Peptidesequence or amino acid sequence is the order in which amino acid residues, connected by peptide bond s, lie in the chain in peptide s and protein s . The sequence is generally reported from the N terminal end containing free amino group to the C terminal end containing free carboxyl group . Peptidesequence is often called protein sequence if it represents the primary structure of a protein . Sequence notation and applications Many peptide sequences have been in sequence database s. These databases may use various notations to describe the peptidesequence. The full names of the amino acids are rarely given instead, Amino acid Table of standard amino acid abbreviations and properties 3 letter or 1 letter abbreviations are usually recorded for conciseness. Several deductions can be made from the sequence itself. Long stretches of hydrophobic residues may indicate transmembrane helix transmembrane helices . These helices may indicate the peptide is a cell receptor . Certain residues indicate a beta sheet area. If full length protein sequence is available, it is possible to estimate the isoelectric point of the protein. Methods for determining the peptidesequence include deduction from DNA sequence, Edman degradation , and mass spectrometry . Techniques in sequence analysis can be applied to learn more about the peptide. These techniques generally consist of comparing the sequence to other sequences from sequence databases. Other sequences may have already been studied and determined to be significant. Findings about these sequences may be applicable to the sequence under investigation. See also Protein Protein sequencing Rosetta home SIMAP External links http www.nslij genetics.org dnacorr A bibliography on features, patterns, correlations in DNA and protein texts Category Protein structure Category Bioinformatics de Aminos uresequenz el es Secuencia de amino cidos eo Aminoacida sinsekvo ko it Sequenza peptidica pt Sequ ncia pept dica ... more details
A peptidesequence tag is a piece of information about a peptide obtained by tandem mass spectrometry that can be used to identify this peptide in a Sequence database protein database . ref name pmid17492750 cite journal author Hardouin J title Protein sequence information by matrix assisted laser desorption ... information about the amino acid sequence of the peptide. The peptidesequence tag approach, developed ... M, Wilm M title Error tolerant identification of peptides in sequence databases by peptidesequence ... Peptidesequence tag tutorial Category Mass spectrometry Category Proteomics ... author Shadforth I, Crowther D, Bessant C title Protein and peptide identification algorithms using ... M rtz E, O Connor PB, Roepstorff P, Kelleher NL, Wood TD, McLafferty FW, Mann M title Sequence tag identification of intact proteins by matching tanden mass spectral data against sequence data bases ... with a gas within the mass spectrometer and break into pieces at their peptide bond s. The resulting ... ref uses this information to identify the peptide in a database. Briefly, a couple of masses are extracted from the spectrum in order to obtain the peptidesequence tag. This peptidesequence tag is a unique identifier of a specific peptide and can be used to find it in a database containing all possible peptide sequences. Peptide fragment notation Image Peptide fragmentation.gif thumb right 300 px Peptide fragmentation notation using the scheme of Roepstorff and Fohlman 1984 . ref name pmid6525415 cite journal author Roepstorff P, Fohlman J title Proposal for a common nomenclature for sequence ... 1984 pmid 6525415 doi 10.1002 bms.1200111109 ref A notation has been developed for indicating peptide fragments that arise from a tandem mass spectrum. ref name pmid6525415 Peptide fragment ions are indicated ... to a protonated peptide, y nowiki nowiki sup 2 sup is a doubly charged ion analogous to a doubly protonated peptide. ref name pmid7504416 cite journal author Tang XJ, Thibault P, Boyd RK title Fragmentation ... more details
Orphan date April 2012 Chembox ImageFile Peptide T.svg ImageSize 250px IUPACName small L small Alanyl small L small seryl small L small threonyl small L small threonyl small L small threonyl small L small asparaginyl small L small tyrosyl small L small threonine OtherNames Section1 Chembox Identifiers CASNo 106362 32 7 CASNo Ref cascite correct CAS PubChem 73352 ChemSpiderID 66081 SMILES O C N C H C O N C H C O N C H C O N C H C O N C H C O N C H C O N C H C O O C H O C Cc1ccc O cc1 CC O N C H O C C H O C C H O C CO C H N C InChI 1 C35H55N9O16 c1 13 36 28 52 40 22 12 45 31 55 41 25 15 3 47 33 57 ... Peptide T is an HIV entry inhibitor discovered in 1986 by National Institutes of Health National ... FW last8 Farrar first8 WL ref Peptide T, and its modified analog Dala1 peptide T amide DAPTA , a drug in clinical trial s, is a short peptide derived from the HIV envelope protein gp120 which blocks ... 5 CCR5 is a receptor for the HIV entry inhibitor peptide T DAPTA journal Antiviral Res. volume ... ref cite journal author Ruff MR title Peptide T inhibits HIV 1 infection mediated by the chemokine ... Francis A. ref of viral strains which use the CCR5 receptor to infect cells. Peptide T has several ... M, Yang QE, Leoung GS, Ruscetti FW, Pert CB title Update on D ala peptide T amide DAPTA a viral entry ... and 1995. The results showed that peptide T was not significantly different from placebo on the study primary end points. However, peptide T was associated with improved performance in the subgroup of patients ... double blind placebo controlled trial of peptide T for HIV associated cognitive impairment journal ..., double blind, placebo controlled trial of D Ala1 peptide T amide for HIV 1 associated cognitive ... study for peptide T effects on cellular viral load showed reductions in the persistently infected monocyte ... MT title Antiviral and immunological benefits in HIV patients receiving intranasal peptide T DAPTA journal ... doi 10.1016 j.neuroscience.2005.04.029 title Chemokine receptor 5 antagonist Ala peptide T amide ... more details
Other uses In mathematics , a sequence is an ordered list of objects or events . Like a Set mathematics ... possibly infinite is called the length of the sequence. Unlike a set, order matters, and exactly the same elements can appear multiple times at different positions in the sequence. A sequence is a Discrete mathematics discrete function mathematics function . For example, C, R, Y is a sequence of letters ..., or Infinite set infinite , such as the sequence of all even and odd numbers even ... notions of sequence, but may be excluded depending on the context. Image Cauchy sequence illustration2.svg right thumb 350px An infinite sequence of real numbers in blue . This sequence is neither increasing, nor decreasing, nor convergent, nor Cauchy sequence Cauchy . It is, however, bounded ... of which e.g. , exact sequence are not covered by the notations introduced below. In addition to identifying the elements of a sequence by their position, such as the 3rd element , elements may be given names for convenient referencing. For example a sequence might be written as a sub 1 sub , a sub ... definition of a finite sequence with terms in a set S is a function mathematics function from 1, 2, ..., n to S for some n 0. An infinite sequence in S is a function from 1, 2, ... to S . For example, the sequence of prime numbers 2,3,5,7,11, is the function 1 2 , 2 3 , 3 5 , 4 7 , 5 11 , . A sequence of a finite length n is also called an n tuple n tuple . Finite sequences include the empty sequence ... sequence or two way infinite sequence . An example is the bi infinite sequence of all even integers , 4, 2, 0, 2, 4, 6, 8 . Multiplicative Let A a sequence defined by a function f 1, 2, 3, ... 1, 2, 3, ... , such that a sub i sub f i . The sequence is multiplicative if f xy f x f y for all x , y ... of sequences A subsequence of a given sequence is a sequence formed from the given sequence by deleting ... of the sequence are a subset of an partially ordered set ordered set , then a monotonically ... more details
Infobox musical artist See Wikipedia WikiProject Musicians name The Sequence image caption image size Only for images narrower than 220 pixels background group or band alias origin Columbia, South Carolina Columbia , South Carolina , United States U.S. genre Old school hip hop br Funk years active 1979 1985 label Sugar Hill Records rap Sugar Hill associated acts Spoonie Gee website past members Angie Stone Angie Brown Stone Angie B. br Cheryl Cook Cheryl The Pearl br Gwendolyn Chisolm Blondy The Sequence is a former female old school hip hop trio signed to the Sugar Hill Records rap Sugar Hill label in the early 1980s. The group consisted of Cheryl Cook Cheryl The Pearl , Gwendolyn Chisolm Blondie , and lead singer rapper Angie Stone Angie Brown Stone Angie B. . The group originated from Columbia, South Carolina Columbia , South Carolina as a group of high school cheerleader s. Their most notable single was Funk You Up 1979 , which was the first rap record released by a female group and the second single released by Sugar Hill Records rap Sugar Hill Records . ref name Greenberg1999 Greenberg, Steve Light, Alan ed. 1999 . The VIBE History of Hip Hop . Three Rivers Press. p. 28. ISBN 0609805037 ref Elements of Funk You Up were later used by Dr. Dre for his 1995 single Keep Their Heads Ringin . ref Ego Trip s Book of Rap Lists Book of Rap Lists . 1999. Macmillan Publishers Macmillan ... song Let s Do It Again Discography Albums Sugarhill Presents the Sequence 1980 , Sugar Hill Records rap Sugar Hill The Sequence 1982 , Sugar Hill 51 Black Albums The Sequence Party 1983 , Sugar Hill Compilations Funky Sound 1995 , P Vine The Best of the Sequence 1996 , Deep Beats Monster Jam Back ... class artist id p194849 pure url yes The Sequence . Allmusic . External links http www.discogs.com artist Sequence, The Discography DEFAULTSORT Sequence, The Category African American musical groups ... Musical trios Hiphop band stub no The Sequence ... more details
about animal peptide hormones plant peptide hormones plant peptide hormones Peptide hormones are a class of peptide s that are secreted into the blood stream and have endocrine functions in living animals. ref http books.google.com books?id hrp1AAAACAAJ Peptide Hormone Secretion Peptide Hormone Action A Practical Approach, K. Siddle, J. C. Hutton, Oxford University Press, 1991, ISBN 0 19 963073 9. ref Like other protein s, peptide hormone s are synthesized in cell biology cells from amino acid s according to an Messenger RNA mRNA template, which is itself synthesized from a DNA template inside the cell nucleus . Peptide hormone precursors pre prohormones are then processed in several stages, typically in the endoplasmic reticulum , including removal of the N terminal signal sequence and sometimes glycosylation , resulting in prohormone s. The prohormones are then packaged into membrane bound secretory Vesicle biology vesicles , which can be secreted from the cell by exocytosis in response ... books?id QmNrJgAACAAJ&dq peptide hormone Peptide Hormone Secretion A Practical Approach ... system bloodstream , generating the mature hormone form of the molecule. Mature peptide hormones ... receptor biochemistry receptors on the surface of their target cells. Some peptide protein hormone ..., William J. Kraemer, Alan D. Rogol, Blackwell Publishing, 2005, ISBN 1 4051 3017 2. ref Notable peptide hormones Several important peptide hormones are secreted from the pituitary gland. The anterior ... hormone , also called vasopressin, and oxytocin . Peptide hormones are produced by many different organs and tissues, however, including the heart atrial natriuretic peptide ANP or atrial natriuretic ... in a similar fashion to peptide hormones, and some neuropeptides may be used as neurotransmitters in the nervous system in addition to acting as hormones when released into the blood. When a peptide ... reflist Hormones Category Peptide hormones de Proteohormone es Hormona pept dica fr Hormone peptidique ... more details
ref http pubchem.ncbi.nlm.nih.gov summary summary.cgi?cid 16132309 C Peptide Compound Summary , PubChem . ref Section1 Chembox Identifiers CASNo 59112 80 0 PubChem 16132309 SMILES MeSHName C Peptide ... FlashPt Autoignition C peptide is a protein that is produced in the body along with insulin . First preproinsulin is secreted with an A chain, C peptide, a B chain, and a signal sequence. The signal sequence is cut off, leaving proinsulin . Then the C peptide is cut off, leaving the A chain and B chain to form insulin. C peptide should not be confused with c reactive protein or Protein C . History Proinsulin C peptide was first described in 1967 in connection with the discovery of the insulin ... in the endoplasmic reticulum. Equimolar amounts of C peptide and insulin are then stored in secretory .... Initially, the sole interest in C peptide was as a marker of insulin secretion and has as such been .... The first documented use of the C peptide test was in 1972. During the past decade, however, C peptide has been found to be a bioactive peptide in its own right, with effects on microvascular blood flow and tissue health. Function Cellular effects of C peptide C peptide has been shown to bind ... author Hills CE, Brunskill NJ title Intracellular signalling by C peptide journal Exp Diabetes ... that C peptide administration results in significant improvements in nerve and kidney function. Thus, in animals with early signs of diabetes induced neuropathy, C peptide treatment in replacement dosage .... ref cite journal author Sima AA, Zhang W, Sugimoto K, et al. title C peptide prevents and improves ... 889 97 year 2001 month July pmid 11508275 doi 10.1007 s001250100570 url ref Likewise, C peptide administration in animals that had C peptide deficiency type 1 model with nephropathy improves renal ... B, Jacobson SH, Jaremko G, Johansson BL, Sj quist M title Effects of C peptide on glomerular and renal ... Samneg rd B, Jacobson SH, Jaremko G, et al. title C peptide prevents glomerular hypertrophy and mesangial ... more details
Orphan date April 2012 Peptide amphiphile s are peptide based molecules that self assemble into high aspect ratio nanofibers. They were first described by the group of Samuel I. Stupp at Northwestern University in 2003. These molecules typically have three regions a hydrophobic tail, a region of beta sheet forming amino acids, and a peptide epitope designed to allow solubility of the molecule in water, perform a biological function by interacting with living systems, or both. Self assembly occurs by the combination of hydrogen bonding between beta sheet forming amino acids and hydrophobic collapse of the tails to yield the formation of cylindrical micelles that present the peptide epitope at extremely high density at the nanofiber surface. This self assembly of molecules into fibers occurs spontaneously in all solutions of peptide amphiphiles, which have a vanishingly small critical micelle concentration. By changing pH or adding counterions to screen the charged surfaces of fibers, gels can be formed. It has been shown that injection of peptide amphiphile solutions in vivo leads to in situ gel formation due to the presence of counterions in physiological solutions. This, along with the complete ..., the IKVAV sequence in laminin and a consensus sequence to bind heparin sulfate are just a few of the large ... to this, peptide amphiphiles can be used to form more sophisticated architectures. In recent years .... In one study, a thermal treatment of peptide amphiphile solutions led to the formation ... of positively charged peptide amphiphiles and negatively charged long biopolymers led to the formation ... of polymer chains through the diffusion barrier into the peptide amphiphile compartment, leading to the formation ... by altering growth conditions and time. They can incorporate bioactive peptide amphiphiles, encapsulate ... date December 2011 Hartgerink JD, Beniash E, Stupp SI. Self assembly and mineralization of peptide ... Peptide Amphiphile Category Peptides ... more details
1 align right width 280 The amino acid sequence of MCD peptide ref name Argiolas1985 cite journal ... Sequence of Bumblebee MCD Peptide A New Mast Cell Degranulating Peptide From the Venom of the Bumblebee ... the MCD peptidesequence shows similarity with apamin ref cite journal last1 Gmachl first1 M last2 Kreil first2 G year 1995 title The precursors of the bee Venom Constituents Apamin and MCD Peptide ... Ile Gly Lys Ile Cys Arg Lys Ile Cys Met Met Gln Gln Thr His NH2 Mast cell degranulating MCD peptide is a cationic 22 amino acid residue peptide, which is a component of the venom of the bumblebee Megabombus pennsylvanicus . At low concentrations, MCD peptide can stimulate mast cell degranulation. At higher ... sensitive potassium channels . Source MCD peptide is a component of bumblebee Megabombus pennsylvanicus ... 261 issue 3 pages 252 270 url doi 10.1007 BF00536989 ref . In addition to MCD peptide, melittin and apamin ... blockers. MCD peptide is also present in the venom of the honey bee Apis mellifera ref cite journal ... url doi 10.1016 j.neuint.2004.05.006 ref . Chemistry MCD peptide is a cationic 22 amino acid residue peptide with two disulfide bridges ref name Buku1999 cite journal last1 Buku first1 A year 1999 title Mast cell degranulating MCD peptide a prototypic peptide in allergy and inflammation journal Peptides ... properties. MCD peptide belongs to a large family composed of numerous derivatives detecting specific targets and displaying different toxic effects ref name Buku1999 . Targets MCD peptide has immunotoxic as well as neurotoxic properties due to different active sites of the MCD peptide ref name Dreyer1990 cite journal last1 Dreyer first1 F year 1990 title Peptide Toxins and potassium channels journal Rev. Physiol. Biochem. Pharmacol volume 115 issue pages url doi ref . The MCD peptide has an immunotoxic ... role of two venom components of yellow jackets Vespula vulgaris a mast cell degranulating peptide ... 1 pages 25 32 url doi 10.1159 000070431 ref . MCD peptide has also been described as a potent modulator ... more details
A peptide library is a newly developed technique for protein related study. A peptide library contains a great number of peptides that have a systematic combination of amino acids . Usually, peptide library is synthesized on solid phase, mostly on resin , which can be made as flat surface or beads. The peptide library provides a powerful tool for drug design , protein protein interactions , and other biochemical as well as pharmaceutical applications. You can create a mix of desired amino acids at each point in a sequence. In this way, you could create a library of 20 different polypeptides with only one amino acid residue at random and the rest being the same. usefulness of this form of peptide synthesis is limited as you can t go beyond 70 peptides in length. This would give you 70 20 possible combinations and that s only if you don t include the plethora of available amino acids with pre installed post translational modifications. Most drug development does not involve such a random assortment of proteins as you wouldn t learn very much. Important example. Say you wanted a peptide chain 10 residues in length to use in native chemical ligation with a larger recombinantly expressed protein. Chosen out of complete randomness you want a set of proteins with the following. residue 1 Alanine only residue 2 glutamine, glycine, arginine, glutamic acid, serine, or methionine residue 3 any one of all 20 amino acids residue 4 acetyl lysine only residue 5 alanine residue 6 isoleucine residue 7 aspartic acid residue 8 phenylalanine residue 9 acetyl lysine residue 10 argineine with the carboxy terminal thioester. there would be 20 different proteins at residue 3. each one of those would .... this peptide library would be useful for analyzing the effect of the post translational modification ... formula, if you made a completely random peptide library with n amino acids for each link in the chain ... Peptide 20Library.htm Peptide library at pbcpeptide.com Category Biochemistry methods Category ... more details
A transit peptide used in this system refers to the part of the pre sequence that targets the protein ... is located anywhere on the peptide chain. Nucleolus The nucleolus within the nucleus can be targeted with a sequence called a nucleolar localization signal abbreviated NoLS or NOS . Mitochondrial matrix The signal peptide that directs to the mitochondrial Matrix biology matrix has a sequence consisting ... TCDB OPM family 292 OPM protein 1skh CAZy CDD A signal peptide is a short 3 60 amino acid s long peptide chain that directs the transport of a protein . Signal peptides may also be called targeting ... relating to the precise meaning of the term signal peptide . Some sources refer to signal peptides as only the pre sequence that targets the propeptide to the Endoplasmic Reticulum endoplasmic reticulum and through the secretory pathway. Used in this system it does not refer to Transit Peptide transit ... to the secretory pathway have a sequence consisting of 5 20 hydrophobic amino acids on the N terminal end N terminus , which is commonly referred to as the signal sequence. membrane protein Membrane ... transmembrane alpha helical domain may be recognized as a signal sequence. In prokaryotes , signal ... membrane . A homologous system exists in eukaryotes , where the signal sequence directs the newly synthesized protein to the Sec61 channel, which shares structural and sequence homology with the SecYEG ..., the signal sequence is cleaved by a signal peptidase . In both prokaryotes and eukaryotes signal ... when the signal sequence emerges from the ribosome and is recognized by the signal recognition particle SRP . SRP then halts further translation and directs the signal sequence ribosome mRNA complex ... or the ER in eukaryotes . Once membrane targeting is completed, the signal sequence is inserted ... retention sequence, KDEL lys asp glu leu , on the C terminal end C terminus , they are retained in the ER ... localization signal A nuclear localization signal NLS is a signal peptide directing to the nucleus ... more details
Natriuretic peptide refers to a peptide which induces natriuresis the discharge of sodium through urine . Types include Atrial natriuretic peptide Atrium heart atria Brain natriuretic peptide Ventricle heart ventricles in humans, brains in pigs C type natriuretic peptide Dendroaspis natriuretic peptide External links MeshName Natriuretic peptides Hormones Category Urinary system biology stub cs Natriuretick peptid es P ptido natriur tico ... more details
unreferenced date September 2010 A peptide vaccine is a type of subunit vaccine in which a peptide of the original pathogen is used to immunization immunize an organism . Vaccines Category Vaccines vaccine stub ... more details
events or peptide modifications on the microarray slide. For evaluation and interpretation of detected signals an allocation of the peptide spot visible in the image and the corresponding peptidesequence ...wikify reason Needs infobox daye March 2012 date March 2012 A peptide microarray also commonly known as peptide chip or peptide epitope microarray is a collection of peptides displayed on a solid surface, usually a glass or plastic chip. Peptide chips are used by scientists in biology, medicine and pharmacology ... in general. In basic research, peptide microarray s are often used to profile an enzyme like kinase ... tools and vaccine s. Principle The assay principle of peptide microarrays is similar to an ELISA ... chip. This peptide chip can directly be incubated with a variety of different biological samples like ... anti phosphopeptide antibodies and kinases with peptide microarrays using radioactive and fluorescence ... Zettl first7 UK last8 Thiesen first8 HJ title Computational analysis of high density peptide microarray ... file and supplied together with the peptide microarray. The .gal file a tab separated text file can ... or Microsoft Excel. Major differences between peptide microarrays and protein microarrays Peptide microarrays ..., sequence diversity, non natural amino acids Assays rely on detection of robust linear epitope interactions Extended shelf stability Cost efficiency High batch to batch reproducibility Applications of peptide microarrays Peptide microarrays can be used to study all kinds of protein protein interactions ... j.jaci.2009.05.024 title Development of a novel peptide microarray for large scale epitope mapping of food ... antibodies against the tumor related antigen topoisomerase IIa by peptide chip and proteome analysis ... ref Profiling of antibody signatures ref cite journal doi 10.1128 CVI.00208 09 title Peptide Microarray ... enzyme activities Consensus sequence and key residues determination ref cite journal ... of molecular biology ref Production of a peptide microarray A peptide microarray is a planar slide ... more details
during the synthesis of a given peptide vary depending on the peptidesequence and the type of N terminal ... sequence into an easy peptidesequence . The new technology, called SIP technology, uses structure ... 28D5 4782 A161 B8EC9836CB43 7D ref The SIP technology is a small pre sequencepeptidesequence ...In organic chemistry , peptide synthesis is the production of peptide s, which are organic compound s in which multiple amino acid s are linked via amide bonds which are also known as peptide bond s. The biological process of producing long peptides proteins is known as protein biosynthesis . Image Peptide Synthesis.svg thumb right 500px upright 4.1 alt Table of Amino Acids. Solid Phase Peptide Syntesis ... necessary. Chemical peptide synthesis starts at the C terminal end of the peptide and ends at the N ... phase synthesis Liquid phase peptide synthesis is a classical approach to peptide synthesis. It has ... 250px Coupling step in solid phase peptide synthesis Solid phase peptide synthesis SPPS , pioneered ... Solid Phase Peptide Synthesis. I. The Synthesis of a Tetrapeptide year 1963 journal J. Am. Chem. Soc ... the peptide synthesis community. It is now the accepted method for creating peptide s and protein ... which are difficult to express in bacteria , the incorporation of unnatural amino acid s, peptide protein ... solid beads, insoluble yet porous, are treated with functional units linkers on which peptide chains can be built. The peptide will remain covalently attached to the bead until cleaved from it by a reagent such as anhydrous hydrogen fluoride or trifluoroacetic acid . The peptide is thus immobilized ... of coupling wash deprotection wash. The free N terminal amine of a solid phase attached peptide is coupled ... with all of the growing peptide of interest remaining covalently attached to the insoluble resin ..., if each coupling step were to have 99 yield, a 26 amino acid peptide would be synthesized in 77 ... Fmoc and Boc . Unlike ribosome protein synthesis, solid phase peptide synthesis proceeds in a C ... more details
. The nucleotide sequence of the human gene for proopiomelanocortin POMC was characterized in 1980. ref ... the pro opiomelanocortin peptide year 1980 month August journal Proc. Natl. Acad. Sci. U.S.A. pages ... opioid peptides called endorphins . The human gene for enkephalin s was isolated and its sequence ... of sequence similarity to the enkephalin gene was isolated and its sequence described in 1983. ref ... ca P ptid opioide de Opioidpeptid es P ptido opioide fr Peptide opio de nl Opio de peptide ja ... more details
Peptide PHI or peptide histidine isoleucine is a peptide which functions as a hormone . It plays a role in the regulation of prolactin in humans. ref cite journal author Kulick R, Chaiseha Y, Kang S, Rozenboim I, El Halawani M title The relative importance of vasoactive intestinal peptide and peptide histidine isoleucine as physiological regulators of prolactin in the domestic turkey journal Gen Comp Endocrinol volume 142 issue 3 pages 267 273 year 2005 pmid 15935152 doi 10.1016 j.ygcen.2004.12.024 ref References references External links MeshName Peptide PHI Category Hormones biochemistry stub sr Peptid PHI ... more details
nofootnotes date March 2011 Orphan date August 2010 Image WALP 19.png thumb 280px WALP 19 protein peptide of the following sequence of 19 amino acids GWWLALALALALALALWWA. Tryptophan residues are shown in green while leucines and alanines are displayed in red and blue, respectively. WALP peptides are a class of synthesized, membrane spanning Alpha helix helices composed of tryptophan W , alanine A , and leucine L amino acids. They are designed to study properties of proteins in lipid membranes such as orientation, extent of insertion, and hydrophobic mismatch . Significance The transmembrane region of many integral membrane proteins consists of at least one alpha helix, which can directly affect cell signaling and molecular transport across the bilayer. The hydrophobic environment of the phospholipid tails affects the position and structure of such domains and thus may influence protein function. The bilayer can change the thickness of its hydrocarbon region to interact optimally with hydrophobic regions of a transmembrane protein, such as a WALP. WALPs provide an effective model for studying such interactions because of their hydrophobic, alternating alanine and leucine regions. They are readily manipulated by extending or decreasing the number of amino acids and by substituting the anchoring tryptophan residues for charged residues, such as arginine and lysine. Additionally, they are useful for studying the impact of changes in lipid composition on peptide insertion. Responses to lipid environment When hydrophobic mismatch occurs, WALPs are known to tilt in the bilayer. The extent of this tilt is affected up to a certain point by an entropy contribution that arises from the helix s presence in the bilayer and then by more specific helix lipid interactions. When charged residues are substituted for the anchoring residues, these charged amino acids prefer a higher position ... pmc 2895360 Reflist External links http www.example.com example.com DEFAULTSORT Walp Peptide Category ... more details
Orphan date April 2012 Chembox verifiedrevid 319453975 Reference ref name Sigma http www.sigmaaldrich.com catalog ProductDetail.do?N4 F3506 SIGMA&N5 SEARCH CONCAT PNO BRAND KEY&F SPEC N Formyl Met Leu Phe at Sigma Aldrich ref ImageFile Chemotactic peptide.png ImageSize 200px IUPACName 2 S 2 nowiki nowiki 2 S 2 nowiki nowiki 2 S 2 Formamido 4 methylsulfanylbutanoyl amino 4 methylpentanoyl amino 3 phenylpropanoic acid OtherNames fMLF N Formyl Met Leu Phe N Formyl small L small methionyl small L small leucyl small L small phenylalanine Section1 Chembox Identifiers CASNo 59880 97 6 PubChem 443295 SMILES OC C H CC1 CC CC C1 NC C H CC C C NC C H CCSC NC O O O O ChemSpiderID 391541 InChI 1 C21H31N3O5S c1 14 2 11 17 23 19 26 16 22 13 25 9 10 30 3 20 27 24 18 21 28 29 12 15 7 5 4 6 8 15 h4 8,13 14,16 18H,9 12H2,1 3H3, H,22,25 H,23,26 H,24,27 H,28,29 t16 ,17 ,18 m0 s1 InChIKey PRQROPMIIGLWRP BZSNNMDCBS StdInChI 1S C21H31N3O5S c1 14 2 11 17 23 19 26 16 22 13 25 9 10 30 3 20 27 24 18 21 28 29 12 15 7 5 4 6 8 15 h4 8,13 14,16 18H,9 12H2,1 3H3, H,22,25 H,23,26 H,24,27 H,28,29 t16 ,17 ,18 m0 s1 StdInChIKey PRQROPMIIGLWRP BZSNNMDCSA N Section2 Chembox Properties C 21 H 31 N 3 O 5 S 1 Appearance Density MeltingPt BoilingPt Solubility Section3 Chembox Hazards MainHazards FlashPt Autoignition SPhrases S22 Chemotactic peptide is a formylation formylated tripeptide produced by some types of bacteria. The amino acid sequence is N Formylmethionine N formylmethionine , leucine , phenylalanine . It is a potent inducer of leucocyte chemotaxis and is also a macrophage activator. ref name Sigma References reflist Category Peptides ... more details
Orphan date April 2012 Peptide computing is a form of computing which uses peptide s and molecular biology , instead of traditional silicon based computer technologies. The basis of this computational model is the affinity of antibodies towards peptide sequences. Similar to DNA computing , the parallel interactions of peptide sequences and antibodies have been used by this model to solve a few NP complete problems. Specifically, the hamiltonian path problem HPP and some versions of the set cover problem are a few NP complete problems which have been solved using this computational model so far. This model of computation has also been shown to be Turing completeness computationally universal or Turing complete . This model of computation has some critical advantages over DNA computing . For instance, while DNA is made of four building blocks, peptide s are made of twenty building blocks. The peptide antibody interactions are also more flexible with respect to recognition and affinity than an interaction between a DNA strand and its reverse complement. However, unlike DNA computing, this model is yet to be practically realized. The main limitation is the availability of specific monoclonal antibodies required by the model. See also Biocomputers Computational gene Computational complexity theory DNA computing Molecular electronics Parallel computing References cite journal doi 10.1007 3 540 48017 X 27 author M. Sakthi Balan, Kamala Krithivasan, Y. Sivasubramanyam year 2001 title Peptide Computing Universality and Complexity journal Lecture Notes in Computer Science volume 2340 issue pages 290&ndash 299 url http www.csd.uwo.ca sakthi hpp revised.ps series Lecture Notes in Computer Science isbn 978 3 540 43775 8 cite journal author Hubert Hug and Rainer Schuler year 2001 title Strategies for the development of a peptide computer journal Bioinformatics volume 17 issue 4 pages 364&ndash 368 url http bioinformatics.oxfordjournals.org cgi reprint 17 4 364 doi 10.1093 bioinformatics ... more details
Gastroinhibitory polypeptide s or Gastroinhibitory peptides GIP , are physiologically important in potentiating insulin release. ref name googbook The cholinergic neuron and its target the electromotor innervation of the electric ray Torpedo as a model. Whittaker. Birkhauser. 1992. 572 pgs. ref GIP stimulates insulin release when glucose concentration is elevated. References reflist See also Gastric inhibitory polypeptide glucose dependent insulinotropic peptide Category Peptide hormones biology stub ... more details
Orphan date July 2011 enzyme Name peptide deformylase EC number 3.5.1.88 CAS number IUBMB EC number 3 5 1 88 GO code 0042586 image width caption In enzymology , a peptide deformylase EC number 3.5.1.88 is an enzyme that catalysis catalyzes the chemical reaction formyl L methionyl peptide H sub 2 sub O math rightleftharpoons math formate methionyl peptide Thus, the two substrate biochemistry substrates of this enzyme are formyl L methionyl peptide and water H sub 2 sub O , whereas its two product chemistry products are formate and methionyl peptide . This enzyme belongs to the family of hydrolase s, those acting on carbon nitrogen bonds other than peptide bonds, specifically in linear amides. The systematic name of this enzyme class is formyl L methionyl peptide amidohydrolase . Structural studies As of late 2007, 34 tertiary structure structures have been solved for this class of enzymes ... PT, Hao B, Tsai CM, Pei D year 1997 title Crystal structure of the Escherichia coli peptide ... Structure of peptide deformylase and identification of the substrate binding site journal J. Biol ..., substrate recognition and mechanism of peptide deformylase journal Nat. Struct. Biol. volume 5 ... and Pei D year 1997 title Peptide deformylase a new type of mononuclear iron protein journal J. Am ... of functionally competent Escherichia coli peptide deformylase forms containing either iron ... year 2000 title Characterization of cobalt II substituted peptide deformylase function of the metal ... 1999 title Determination of substrate specificity for peptide deformylase through the screening of a combinatorial peptide library journal Biochemistry. volume 38 pages 643&ndash 50 pmid 9888804 doi ... 1999 title Substrate recognition and selectivity of peptide deformylase Similarities and differences ... title Peptide deformylase as a target for new generation, broad spectrum antimicrobial agents journal ... issue 6 cite journal author Pei D year 2001 title Peptide deformylase a target for novel antibiotics ... more details
File Peptide bond.png thumb Peptide bond File Glycine condensation 2 3D balls.png thumb 180px Glycine condensation A peptide bond amide bond is a covalent bond covalent chemical bond formed between two ... C O NH bond is called a peptide bond, and the resulting molecule is an amide . The four atom functional group C O NH is called a peptide link . Polypeptide s and protein s are chains of amino acid s held together by peptide bonds, as is the backbone of Peptide nucleic acid PNA . File Amidbildung.svg frame Figure 1 Dehydration synthesis condensation reaction forming an amide A peptide bond can be broken by amide hydrolysis the adding of water . The peptide bonds in proteins are metastable ... of peptide bond hydrolysis and formation , Biopolymers , 45 , 351 353. ref of Thermodynamic free energy ... by enzyme s. Living organisms also employ enzymes to form peptide bonds this process requires free energy. The wavelength of absorbance for a peptide bond is 190 230 nm ref Goldfarb AR et al. 1951 ... forms of the peptide group Image Mesomeric peptide bond.svg thumb right 300px Figure 2 Resonance forms of a typical peptide group. The uncharged, single bonded form typically 60 is shown on the left, whereas the charged, double bonded form typically 40 is on the right. Image Prolyl peptide group resonance.png frame right Figure 3 A hydrogen bond dotted line to an X Pro peptide group favors the single bonded resonance form left over the double bonded form right . Image Prolyl peptide group resonance ... double bond character, estimated at 40 under typical conditions. The peptide group is uncharged at all ... in an X proline Pro peptide bond should favor the single bonded form donating it to the double ... Figure 4. Cis trans isomers of the peptide group The partial double bond renders the amide group Plane ... state of proteins, the peptide groups are free to isomerize and adopt both isomers however, in the folded ... form is preferred overwhelmingly in most peptide bonds roughly 1000 1 ratio in trans cis populations ... more details
PBB geneid 5697 Peptide YY is a short 36 amino acid protein released by cells in the ileum and colon ... known as PYY , Peptide Tyrosine Tyrosine , or Pancreatic Peptide YY sub 3 36 sub . ref name entrez cite web title Entrez Gene PYY peptide YY url http www.ncbi.nlm.nih.gov sites entrez?Db gene&Cmd ShowDetailView&TermToSearch 5697 accessdate ref Structure Peptide YY is related to the pancreatic peptide family by having 18 of its 36 amino acids located in the same positions as pancreatic peptide. ref ... quote isbn 0 7216 2888 5 oclc doi url accessdate page 2754 ref There are two major forms of Peptide ... month December pmid 17167473 doi 10.1038 nature05484 url ref Peptide YY sub 3 36 sub PYY is a linear ... title Distribution and release of peptide YY in dog measured by specific radioimmunoassay journal Gastroenterology ... Characterization of brainstem peptide YY PYY neurons. journal J Comp Neurol volume 506 issue 2 pages ... D title Peptide YY a potential proabsorptive hormone for the treatment of malabsorptive disorders ... Peptide YY Secretion in Morbidly Obese Patients Before and After Vertical Banded Gastroplasty ref On the other ... GS, Ghatei MA, Bloom SR title Inhibition of food intake in obese subjects by peptide YY3 36 journal ... K, Herzog H, Le Roux CW, Thomas EL, Bell JD, Withers DJ title Critical role for peptide YY in protein ... of pancreatic polypeptide and peptide YY journal Peptides volume 23 issue 2 pages 251 61 year 2002 ... and the effect of aging on pancreatic polypeptide and peptide YY journal Peptides volume 23 issue ... H title Central and peripheral regulation of gastric acid secretion by peptide YY journal Peptides ... by peptide YY journal Peptides volume 23 issue 2 pages 359 65 year 2002 pmid 11825650 doi 10.1016 ... S0196 9781 01 00613 1 cite journal author Hagan MM title Peptide YY a key mediator of orexigenic ... 9781 01 00614 3 cite journal author Mannon PJ title Peptide YY as a growth factor for intestinal epithelium ... 01 00615 5 cite journal author Tseng WW, Liu CD title Peptide YY and cancer current findings and potential ... more details
Nonribosomal peptide s NRP are a class of peptide secondary metabolites , usually produced by microorganism ... by ribosome s, the term nonribosomal peptide typically refers to a very specific set of these as discussed in this article. Nonribosomal peptides are synthesized by nonribosomal peptide synthetases , which, unlike the ribosome s, are independent of messenger RNA . Each nonribosomal peptide synthetase can synthesize only one type of peptide. Nonribosomal peptides often have a cyclic compound cyclic ... of amino acids against the peptide backbone is often performed, resulting in oxazoline s and thiazoline ... peptide antibiotic s, cytostatic s, and immunosuppressant s are in commercial use. Examples ... MPMI.2000.13.7.742 title Cloning and Characterization of a Cyclic Peptide Synthetase Gene from Alternaria ... by one or more specialized nonribosomal peptide synthetase NRPS enzyme s. The NRPS genes for a certain peptide are usually organized in one operon in bacteria and in gene cluster s in eukaryote ... peptide synthetases contain polyketide polyketide synthase modules for the insertion of acetate or propionic acid propionate derived subunits into the peptide chain. Modules The order of modules and domains of a complete nonribosomal peptide synthetase is as follows Initiation or Starting ... required in a module Peptidyl carrier protein PCP Thiolation and Peptide Carrier Protein with attached ... catalyzes the amide Chemical bond bond formation between the thioester group of the growing peptide chain from the previous module with the amino group of the current module. The extended peptide is now ... of the peptide chain into the D configuration . This cycle is repeated for each elongation module ... lactam s or cyclic ester s lactone s . Also, the peptide can be released by an R domain that Redox reduces the thioester bond to terminal aldehyde or alcohol . Processing The final peptide is often modified ... peptide synthesis have been identified. The condensation domain condensation C domain ... more details
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