Image DNA UV mutation.svg thumb right 300px DNA Lesion Thymine Dimer Pyrimidinedimers are molecular ... title The Molecular Perspective Ultraviolet Light and PyrimidineDimers author David S. Goodsell journal ... Type PyrimidineDimers in Polynucleotides author R. B. Setlow pmid 5328566 ref ref cite web ... polymerase s frequently introduce mutations at pyrimidinedimers, both in prokaryotes SOS mutagenesis and in eukaryotes. Although the thymine thymine CPDs thymine dimers are the most frequent lesions caused by UV light, translesion polymerases are biased toward introduction of As, so that TT dimers ... DNA repair Image melanoma.jpg thumb right 300px Melanoma type of skin cancer Pyrimidinedimers introduce ... pyrimidinedimers in humans may lead to melanoma. ref cite journal doi 10.1016 S1011 1344 01 00245 7 author Vink Arie A., Roza Len year 2001 title Biological consequences of cyclobutane pyrimidinedimers url journal Journal of Photochemistry and Photobiology B Biology volume 65 issue 2 3 ... 217 year 2001 pmid 11555330 doi 10.1034 j.1600 0781.2001.170502.x ref In dsRNA , uracil dimers may also accumulate as a result of UV radiation. Two common UV products are cyclobutane pyrimidinedimers CPDs, including thymine dimers and 6,4 photoproducts. These premutagenic lesions alter the structure of DNA and consequently inhibit polymerases and arrest replication. Dimers may be repaired by photoreactivation or nucleotide excision repair, but unrepaired dimers are mutagenic. Pyrimidinedimers are the primary cause of melanoma s in human beings. Citation needed date January 2012 Types of dimers .... Right Cyclobutane pyrimidine dimer. A cyclobutane pyrimidine dimer CPD contains a four membered ... 2nd publisher Benjamin Cummings Publication year 1990 url isbn 978 0805350159 page 1168 ref Such dimers ..., or 6,4 pyrimidine pyrimidones, occur at one third the frequency of CPDs but are more mutagenic. ref ... enables the photochemical reactions to occur, which results in the elimination of the pyrimidine ... more details
Chembox verifiedrevid 464377262 ImageFile1 Ref chemboximage correct ?? ImageFile1 Pyrimidine chemical structure.png ImageSize1 280px ImageFile2 Pyrimidine2.png ImageSize2 190px IUPACName Pyrimidine OtherNames 1,3 Diazine, m Diazine Section1 Chembox Identifiers ChemSpiderID Ref chemspidercite correct chemspider ChemSpiderID 8903 KEGG Ref keggcite correct kegg KEGG C00396 InChI 1 C4H4N2 c1 2 5 4 6 3 ... 95 2 PubChem 9260 ChEBI Ref ebicite correct EBI ChEBI 16898 SMILES c1cncnc1 MeSHName pyrimidine Section2 ... Structures by Physical Methods , Academic Press, New York, 1955. ref protonated pyrimidine Section3 Chembox Hazards MainHazards FlashPt Autoignition Pyrimidine is a heterocyclic aromatic organic ... , with the nitrogen atoms in positions 1 and 4. Chemical properties A pyrimidine has many ... are also less basicity basic The pKa value for protonated pyrimidine is 1.23 compared to 5.30 for pyridine. Pyrimidine is also found in meteorites, but scientists still do not know its origin. Pyrimidine ... photo irradiation of pyrimidine in pure H2O ices. journal Astrobiology volume 9 issue 7 pages ... ref Single Step Synthesis of Pyrimidine Derivatives Mohammad Movassaghi and Matthew D. Hill J. Am ... 400px Pyrimidine Synthesis Movassaghi 2006 Nucleotides Three nucleobase s found in nucleic acid s, cytosine C , thymine T , and uracil U , are pyrimidine derivatives Image Cytosine ... can appear in RNA, or uracil in DNA. Other than the three major pyrimidine bases presented, some minor pyrimidine bases can also occur in nucleic acids . These minor pyrimidines are usually methylated ... 2007 See also Pyrimidine biosynthesis Simple aromatic ring s ANRORC mechanism References reflist Nucleobases ... es Pirimidina eo Pirimidino eu Pirimidina fa fr Pyrimidine gl Pirimidina it Pirimidina he lt Pirimidinas hu Pirimidin mk nl Pyrimidine ja oc Pirimidina pl Pirymidyna ... Pyrimidin ta uk ur Pyrimidine zh ... more details
nofootnotes date August 2008 Pyrimidine biosynthesis occurs both in the body and through organic synthesis. De novo biosynthesis of pyrimidine carbamoyl phosphate synthetase II ref cite web title Entrez Gene Dihydroorotase CAD carbamoyl phosphate synthetase 2 , aspartate transcarbamylase, and dihydroorotase url http www.ncbi.nlm.nih.gov sites entrez?Db gene&Cmd ShowDetailView&TermToSearch 790 accessdate ref carbamoyl phosphate This is the regulated step in the pyrimidine biosynthesis. aspartic transcarbamolyase aspartate carbamoyl transferase ref cite web title Entrez Gene CAD carbamoyl phosphate synthetase 2, aspartate transcarbamylase, and dihydroorotase url http www.ncbi.nlm.nih.gov sites entrez?Db gene&Cmd ShowDetailView&TermToSearch 790 accessdate ref carbamoyl aspartic acid dihhydroorotase ref cite web title Entrez Gene CAD carbamoyl phosphate synthetase 2, aspartate transcarbamylase, and dihydroorotase url http www.ncbi.nlm.nih.gov sites entrez?Db gene&Cmd ShowDetailView&TermToSearch 790 accessdate ref dihydroorotate Dehydration dihydroorotate dehydrogenase ref cite web title Entrez Gene DHODH dihydroorotate dehydrogenase url http www.ncbi.nlm.nih.gov sites entrez?Db gene&Cmd ShowDetailView&TermToSearch 1723 accessdate ref the only mitochondrial enzyme orotate Dihydroorotate then enters the mitochondria where it is oxidised through removal of hydrogens. This is the only mitochondrial step in nucleotide rings biosynthesis. orotate phosphoribosyltransferase ref cite web title Entrez Gene UMPS uridine monophosphate synthetase url http www.ncbi.nlm.nih.gov sites entrez?Db gene&Cmd ShowDetailView&TermToSearch 7372 accessdate ref orotidine 5 monophosphate OMP PRPP is used ... , the first three steps are done by three different enzymes. Pyrimidine catabolism Pyrimidines are ultimately ... for rate of DNA turnover. Fact date February 2007 Pharmacotherapy Modulating the pyrimidine metabolism pharmacologically has therapeutical uses. Pyrimidine synthesis inhibitors are used in active ... more details
enzyme Name pyrimidine nucleoside phosphorylase EC number 2.4.2.2 CAS number 9055 35 0 IUBMB EC number 2 4 2 2 GO code 0016154 image width caption In enzymology , a pyrimidine nucleoside phosphorylase EC number 2.4.2.2 is an enzyme that catalysis catalyzes the chemical reaction a pyrimidine nucleoside phosphate math rightleftharpoons math a pyrimidine base alpha D ribose 1 phosphate Thus, the two substrate biochemistry substrates of this enzyme are pyrimidine nucleoside and phosphate , whereas its two product chemistry products are pyrimidine base and alpha D ribose 1 phosphate . This enzyme belongs to the family of glycosyltransferase s, specifically the pentosyltransferases. The systematic name of this enzyme class is pyrimidine nucleoside phosphate alpha D ribosyltransferase . This enzyme is also called Py NPase . This enzyme participates in pyrimidine metabolism . Structural studies As of late 2007, two tertiary structure structures have been solved for this class of enzymes, with Protein Data Bank PDB accession codes PDB link 1BRW and PDB link 2DSJ . References reflist 1 Boyer, P.D., Lardy, H. and Myrback, K. Eds. , The Enzymes, 2nd ed., vol. 5, Academic Press, New York, 1961, p. 237 255. cite journal author Saunders PP, Wilson BA, Saunders GF date 1969 title Purification and comparative properties of a pyrimidine nucleoside phosphorylase from Bacillus stearothermophilus journal J. Biol. Chem. volume 244 pages 3691&ndash 7 pmid 4978445 issue 13 cite journal doi 10.1271 bbb.60.1179 author Hamamoto T, Noguchi T, Midorikawa Y date 1996 title Purification and characterization of purine nucleoside phosphorylase and pyrimidine nucleoside phosphorylase from Bacillus stearothermophilus TH 6 2 journal Biosci. Biotechnol. Biochem. volume 60 pages 1179&ndash 80 pmid 8782414 issue 7 enzyme stub Category EC 2.4.2 Category Enzymes of known structure ... more details
enzyme Name pyrimidine deoxynucleoside 1 dioxygenase EC number 1.14.11.10 CAS number 98865 52 2 IUBMB EC number 1 14 11 10 GO code 0047079 image width caption In enzymology , a pyrimidine deoxynucleoside 1 dioxygenase EC number 1.14.11.10 is an enzyme that catalysis catalyzes the chemical reaction 2 deoxyuridine 2 oxoglutarate O sub 2 sub math rightleftharpoons math uracil 2 deoxyribonolactone succinate CO sub 2 sub The 3 substrate biochemistry substrates of this enzyme are 2 deoxyuridine , 2 oxoglutarate , and oxygen O sub 2 sub , whereas its 4 product chemistry products are uracil , 2 deoxyribonolactone , succinate , and carbon dioxide CO sub 2 sub . This enzyme belongs to the family of oxidoreductase s, specifically those acting on paired donors, with O2 as oxidant and incorporation or reduction of oxygen. The oxygen incorporated need not be derived from O2 with 2 oxoglutarate as one donor, and incorporation of one atom o oxygen into each donor. The systematic name of this enzyme class is 2 deoxyuridine,2 oxoglutarate oxygen oxidoreductase 1 hydroxylating . This enzyme is also called deoxyuridine uridine 1 dioxygenase . It has 2 cofactor biochemistry cofactors iron , and Ascorbate . References reflist 1 cite journal author Stubbe J date 1985 title Identification of two alpha ketoglutarate dependent dioxygenases in extracts of Rhodotorula glutinis catalyzing deoxyuridine hydroxylation journal J. Biol. Chem. volume 260 pages 9972&ndash 5 pmid 4040518 issue 18 1.14 enzyme stub Category EC 1.14.11 Category Iron enzymes Category Ascorbate enzymes Category Enzymes of unknown structure it Pirimidina deossinucleoside 1 diossigenasi ja 1 ... more details
enzyme Name pyrimidine deoxynucleoside 2 dioxygenase EC number 1.14.11.3 CAS number 9076 89 5 IUBMB EC number 1 14 11 3 GO code 0047080 image width caption In enzymology , a pyrimidine deoxynucleoside 2 dioxygenase EC number 1.14.11.3 is an enzyme that catalysis catalyzes the chemical reaction 2 deoxyuridine 2 oxoglutarate O sub 2 sub math rightleftharpoons math uridine succinate CO sub 2 sub The 3 substrate biochemistry substrates of this enzyme are 2 deoxyuridine , 2 oxoglutarate , and oxygen O sub 2 sub , whereas its 3 product chemistry products are uridine , succinate , and carbon dioxide CO sub 2 sub . This enzyme belongs to the family of oxidoreductase s, specifically those acting on paired donors, with O2 as oxidant and incorporation or reduction of oxygen. The oxygen incorporated need not be derived from O2 with 2 oxoglutarate as one donor, and incorporation of one atom o oxygen into each donor. The systematic name of this enzyme class is 2 deoxyuridine,2 oxoglutarate oxygen oxidoreductase 2 hydroxylating . Other names in common use include deoxyuridine 2 dioxygenase , deoxyuridine 2 hydroxylase , pyrimidine deoxyribonucleoside 2 hydroxylase , thymidine 2 dioxygenase , thymidine 2 hydroxylase , thymidine 2 oxoglutarate dioxygenase , and thymidine dioxygenase . It has 2 cofactor biochemistry cofactors iron , and Ascorbate . References reflist 1 cite journal author Bankel L, Lindstedt G, Lindstedt S date 1972 title Thymidine 2 hydroxylation in Neurospora crassa journal J. Biol. Chem. volume 247 pages 6128&ndash 34 pmid 4265566 issue 19 cite journal author Stubbe J date 1985 title Identification of two alpha ketoglutarate dependent dioxygenases in extracts of Rhodotorula glutinis catalyzing deoxyuridine hydroxylation journal J. Biol. Chem. volume 260 pages 9972&ndash 5 pmid 4040518 issue 18 cite journal author Warn Cramer BJ, Macrander LA, Abbott MT date 1983 title Markedly different ascorbate dependencies of the sequential alpha ketoglutarate dioxygenase reactions ... more details
Infobox disease Name Inborn errors of purine pyrimidine metabolism Image Caption DiseasesDB ICD10 ICD10 E 79 e 70 ICD9 ICD9 277.2 ICDO OMIM MedlinePlus eMedicineSubj eMedicineTopic MeshID D011686 Inborn errors of purine pyrimidine metabolism are a class of inborn error of metabolism disorders specifically affecting purine metabolism and pyrimidine metabolism . An example is Lesch Nyhan syndrome . Urine tests may be of use in identifying some of these disorders. ref name pmid10102915 cite journal author Wevers RA title 1H NMR spectroscopy of body fluids inborn errors of purine and pyrimidine metabolism journal Clin. Chem. volume 45 issue 4 pages 539 48 year 1999 month April pmid 10102915 doi url http www.clinchem.org cgi pmidlookup?view long&pmid 10102915 accessdate 2008 05 07 author separator , author2 Engelke UF author3 Moolenaar SH display authors 3 last4 Br utigam first4 C last5 De Jong first5 JG last6 Duran first6 R last7 De Abreu first7 RA last8 Van Gennip first8 AH ref References reflist Purine, pyrimidine, porphyrin, bilirubin metabolic pathology medicine stub Category Inborn errors of purine pyrimidine metabolism ru ... more details
B type proanthocyanidins are a specific type of proanthocyanidin , which are a class of flavanoid s. They are oligomer s of flavan 3 ol s. Dimeric B type proanthoanthocyanidins These molecules have the molecular formula C sub 30 sub H sub 26 sub O sub 12 sub molar mass 578.52 g mol, exact mass 578.142426 . Molecules with 4 8 bonds File Dimeric 4 8 Procyanidin B numbered.PNG thumb right 200px Dimeric 4 8 B type proanthocyanidin chemical structure The 4 8 bond can be in the alpha or in the beta position. Proanthocyanidin B1 or epicatechin 4 8 catechin Proanthocyanidin B2 or epicatechin 4 8 epicatechin Proanthocyanidin B3 or catechin 4 8 catechin Proanthocyanidin B4 or catechin 4 8 epicatechin Molecules with 4 6 bonds File Dimeric 4 6 Procyanidin B numbered.PNG thumb left 200px chemical structure of a 4 6 dimeric B type proanthocyanidin Proanthocyanidin B5 or epicatechin 4 6 epicatechin Proanthocyanidin B6 or catechin 4 6 catechin Proanthocyanidin B8 or catechin 4 6 epicatechin Trimers Proanthocyanidin C1 or epicatechin 4 8 epicatechin 4 8 epicatechin Arecatannin B1 or epicatechin 4 8 epicatechin 4 6 catechin Chemistry B type procyanidin catechin dimer can be converted to A type proanthocyanidin A type procyanidin by radical oxidation ref http www.sciencedirect.com science? ob ArticleURL& udi B6THS 40K9BV9 D& user 10& coverDate 01 2F22 2F2000& rdoc 1& fmt high& orig search& sort d& docanchor &view c& acct C000050221& version 1& urlVersion 0& userid 10&md5 f26a4f71c500331898643f7521cee334 Conversion of procyanidin B type catechin dimer to A type evidence for abstraction of C 2 hydrogen in catechin during radical oxidation. Kazunari Kondo, Masaaki Kurihara, Kiyoshi Fukuhara, Takashi Tanaka, Takashi Suzuki, Naoki Miyata and Masatake Toyoda, Tetrahedron Letters, Volume 41, Issue 4, 22 January 2000, Pages 485 488, doi 10.1016 S0040 4039 99 02097 3 ref . See also A type proanthocyanidin References reflist proanthocyanidin DEFAULTSORT B Type Proanthocyanidin Catego ... more details
O Here, the dimer has a stoichiometry different from the pair of monomers. Biochemical dimersPyrimidinedimers are formed by a photochemical reaction from pyrimidine DNA base s. This cross linking ...refimprove date April 2009 File Carboxylic acid dimers.png right thumb Dimers of carboxylic acid s are often found in vapour phase. A dimer is a chemical entity consisting of two structurally similar monomer s joined by bonds that can be either strong or weak, Covalent bond covalent or Intermolecular force intermolecular . The term homodimer is used when the two molecules are identical e.g. A A and heterodimer when they are not e.g. A B . The reverse of dimerisation is often called Dissociation chemistry dissociation . Noncovalent dimers Carboxylic acid s form dimers by hydrogen bonding of the acidic hydrogen and the carbonyl oxygen when anhydrous. For example, acetic acid forms a dimer in the gas phase, where the monomer units are held together by hydrogen bond s. Under special conditions, most OH containing molecules form dimers, e.g. the water dimer . Borane BH sub 3 sub occurs as the dimer diborane B sub 2 sub H sub 6 sub , due to the high Lewis acid ity of the boron center. Excimer s and exciplex es are Excited state excited structures with a short lifetime. For example, noble gas es do not form stable dimers, but do form the excimers Ar sub 2 sub , Kr sub 2 sub and Xe sub 2 sub under high pressure and electrical stimulation. Covalent dimers File Dicyclopentadiene structure.svg thumb right 100px The dimer of cyclopentadiene although this might not be readily apparent on initial inspection Molecular dimers are often formed by the reaction of two identical compounds e.g. 2A ... as dimers hydrogen , nitrogen , oxygen , the halogen s, i.e. fluorine , chlorine , bromine and iodine ... trimer chemistry Trimer Polymer Commonscat Dimers References cite web url http goldbook.iupac.org D01744.html ... Oligomers Category Dimers chemistry ar ca D mer cs Dimer de Dimer et Dimeer es D mero ... more details
CPD can refer to any of the following US police departments Chicago Police Department Cincinnati Police Department Cleveland Police Department Columbus Police Department Certified Project Director as per IAPPM Town of Carmel Police Department , in New York Also CPD Certification Service Campaign for Peace and Democracy Cape Photographic Durchmusterung Centres of Plant Diversity Centre for Policy Dialogue Cephalo pelvic disproportion Cherry Poppin Daddies Chicago Park District Chronic pulmonary disease Collaborative Product Development Collaborative Professional Development Commission on Presidential Debates Committee on the Present Danger Concert of Parties for Democracy Conditional probability distribution Congress of People s Deputies AKA Congress of Soviets Contact potential difference Continuing Professional Development CPD gene , a human gene encoding the protein Carboxypeptidase D CPD Mark Critical Point Drying , a method of specimen preparation for electron microscopy Pyrimidine dimers Cyclobutane photodimers Cyclobutane Pyrimidine Dimer Cyclopentadiene CPD is the ICAO airline designator for Capital Airlines Limited Kenya PMD software Copy.2FPaste Detector .28CPD.29 PMD Copy&Paste Detector CPD disambiguation de CPD fr CPD it CPD ja CPD ru th CPD ... more details
Pfam box Symbol DNA photolyase Name DNA photolyase image width caption Pfam PF00875 InterPro IPR006050 SMART Prosite PDOC00331 SCOP 1qnf TCDB OPM family OPM protein DNA photolyase is an evolutionary conserved protein domain . This domain binds a light harvesting cofactor. ref name pmid9360600 cite journal author Tamada T, Kitadokoro K, Higuchi Y, Inaka K, Yasui A, de Ruiter PE, Eker AP, Miki K title Crystal structure of DNA photolyase from Anacystis nidulans journal Nat. Struct. Biol. volume 4 issue 11 pages 887 91 year 1997 month November pmid 9360600 doi 10.1038 nsb1197 887 url issn ref Deoxyribodipyrimidine photolyase DNA photolyase is a DNA repair enzyme. It binds to UV damaged DNA containing pyrimidine dimers and, upon absorbing a near UV photon 300 to 500 nm , breaks the cyclobutane ring joining the two pyrimidine s of the dimer. DNA photolyase is an enzyme that requires two chromophore cofactors for its activity a reduced FAD FADH2 and either 5,10 methenyltetrahydrofolate 5,10 Methenyltetrahydrofolate 5,10 MTFH or an oxidized 8 hydroxy 5 deazaflavin 8 HDF derivative Coenzyme F420 F420 . The folate or deazaflavin chromophore appears to function as an antenna, while the FADH2 chromophore is thought to be responsible for electron transfer. On the basis of sequence similarities DNA photolyases can be grouped into two classes. The first class contains enzymes from Gram negative and Gram positive bacteria, the halophilic archaebacteria Halobacterium halobium, fungi and plants. Class 1 enzymes bind either 5,10 MTHF Escherichia coli E. coli , fungi, etc. or 8 HDF Streptomyces griseus S. griseus , Halobacterium H. halobium . Proteins containing this domain also include Arabidopsis thaliana cryptochromes 1 CRY1 and 2 CRY2 , which are blue light photoreceptors that mediate blue light induced gene expression. Examples Human proteins containing this domain include CRY1 CRY2 References Reflist InterPro content IPR005101 protein stub Category Protein domains ... more details
Image direct DNA damage.png thumb right 500px Direct DNA damage The UV photon is directly absorbed by the DNA left . One of the possible reactions from the excited state is the formation of a thymine thymine cyclobutane dimer right . The direct DNA damage leads to sunburn, causing an increase in melanin production, thereby leading to a long lasting tan. However, it is responsible for only 8 of all melanoma. Direct DNA damage can occur when DNA directly absorbs the UV B photon. UVB light causes thymine base pairs next to each other in genetic sequences to bond together into pyrimidine dimers , a disruption in the strand, which reproductive enzymes cannot copy. It causes sunburn and it triggers the production of melanin . ref name Parrish1982 cite journal author John A. Parrish, Kurt F. Jaenicke, R. Rox Anderson title ERYTHEMA AND MELANOGENESIS ACTION SPECTRA OF NORMAL HUMAN SKIN url http www.blackwell synergy.com doi abs 10.1111 j.1751 1097.1982.tb04362.x journal Photochemistry and Photobiology volume 36 issue 2 pages 187 191 year 1982 doi 10.1111 j.1751 1097.1982.tb04362.x pmid 7122713 ref Other names for the direct DNA damage are ref http www.osti.gov bridge servlets purl 6106470 Syh9i7 6106470.PDF Effects of Solar Ultraviolet Photons on Mammalian Cell DNA ref thymine dimer s pyrimidine dimer s Cyclobutane Pyrimidine Dimers CPD s . UV endonuclease sensitive sites ESS Due to the excellent photochemical properties of DNA, this nature made molecule is damaged only by a tiny fraction of the absorbed photons. DNA transforms more than 99.9 of the photons into harmless heat ref name DNA IC But the damage from the remaining 0.1 of the photons is still enough to cause sunburn . ref name Parrish1982 The transformation of excitation energy into harmless heat occurs via a photochemical process called internal conversion chemistry internal conversion . In DNA, this internal conversion chemistry internal conversion is extremely fast and therefore efficient. This ultrafast subpic ... more details
pmc 2668831 ref Photolyases bind complementary DNA strands and break certain types of pyrimidinedimers that arise when a pair of thymine or cytosine bases on the same strand of DNA become covalent bond covalently linked. These dimers result in a bulge of the DNA structure, referred to as a lesion ... FADH sup sup is activated by light energy and acts as an electron donor to break the pyrimidine dimer ... more details
, which, in presence of Ultraviolet ultraviolet light , may form thymine dimers , causing kinks in the DNA ... also deoxyribose deoxythymidine nucleobase pyrimidine uracil References reflist External links http ... more details
3734 pages 379 386 doi 10.1126 science.153.3734.379 title Cyclobutane Type PyrimidineDimers in Polynucleotides ... year 1990 url isbn 978 0 8053 5015 9 page 1168 ref T T dimers thymine dimers formed in between ... more details
. The tanning activator coumarin is known to induce thymine dimers cyclobutane pyrimidinedimers . ref name Kulkarni cite journal author Kulkarni, Manohar V. Kulkarni, Geeta M. Lin, Chao Hsiung ... thymine dimers . In order to produce this action they have to penetrate into the skin, and this is in contrast ... more details
Image Pyrimidin.svg thumb right Pyrimidine Pyrimidinediones are a class of chemical compounds characterized by a pyrimidine ring substituted with two carbonyl groups. Examples include naturally occurring metabolite s class wikitable Trivial name IUPAC name Structure Pathway Uracil Pyrimidine 2,4 1 H ,3 H dione Image Uracil.svg Pyrimidine biosynthesis Thymine 5 Methylpyrimidine 2,4 1 H ,3 H dione File Thymine chemical structure.png 150px Pyrimidine biosynthesis 5,6 Diaminopyrimidine 2,4 1 H ,3 H dione Riboflavin biosynthesis and drugs Image Primidone.png thumb right Primidone Fluorouracil Idoxuridine Primidone Trifluridine References http www.biam2.org www Cla20291.html Classe PYRIMIDINEDIONE heterocyclic stub Category Pyrimidinediones fr Pyrimidinedione ja sr Pirimidindion zh ... more details
The molecular formula C sub 4 sub H sub 4 sub N sub 2 sub may refer to Pyrazine Pyridazine Pyrimidine Succinonitrile MolFormDisambig fr C4H4N2 sr C4H4N2 ... more details
Infobox protein family Symbol FCSD flav bind Name Flavocytochrome c sulfide dehydrogenase, flavin binding image PDB 1fcd EBI.jpg width caption the structure of flavocytochrome c sulfide dehydrogenase from a purple phototrophic bacterium chromatium vinosum at 2.5 angstroms resolution Pfam PF09242 Pfam clan InterPro IPR015323 SMART PROSITE MEROPS SCOP 1fcd TCDB OPM family OPM protein CAZy CDD In molecular biology, flavocytochrome c sulfide dehydrogenase is an enzyme found in sulfur oxidising bacteria such as the purple phototrophic bacterium bacteria Chromatium vinosum . ref name pmid7939681 cite journal author Chen ZW, Koh M, Van Driessche G, Van Beeumen JJ, Bartsch RG, Meyer TE, Cusanovich MA, Mathews FS title The structure of flavocytochrome c sulfide dehydrogenase from a purple phototrophic bacterium journal Science volume 266 issue 5184 pages 430 2 year 1994 month October pmid 7939681 doi 10.1126 science.7939681 url ref ref name pmid15544340 cite journal author Quentmeier A, Hellwig P, Bardischewsky F, Wichmann R, Friedrich CG title Sulfide dehydrogenase activity of the monomeric flavoprotein SoxF of Paracoccus pantotrophus journal Biochemistry volume 43 issue 46 pages 14696 703 year 2004 month November pmid 15544340 doi 10.1021 bi048568y url ref These enzymes are dimers of a flavoprotein and a dihaem cytochrome that carry out hydrogen sulfide dependent cytochrome C Redox reduction . The dihaem cytochrome protein folding fold s into two domains, each of which resembles mitochondrion mitochondrial cytochrome c, with the two haem groups bound to the interior of the subunit. The flavoprotein subunit has a glutathione reductase like fold consisting of a beta 3,4 alpha 3 core, and an alpha beta sandwich. The active site of the flavoprotein subunit contains a catalyst catalytically important disulfide bridge located above the pyrimidine portion of the Flavin group flavin ring. The flavoprotein contains a C terminal domain required for binding to flavin, and subsequent ... more details
enzyme Name pyrimidine 5 nucleotide nucleosidase EC number 3.2.2.10 CAS number 9023 31 8 IUBMB EC number 3 2 2 10 GO code 0047405 image width caption In enzymology , a pyrimidine 5 nucleotide nucleosidase EC number 3.2.2.10 is an enzyme that catalysis catalyzes the chemical reaction a pyrimidine 5 nucleotide H sub 2 sub O math rightleftharpoons math D ribose 5 phosphate a pyrimidine base Thus, the two substrate biochemistry substrates of this enzyme are pyrimidine 5 nucleotide and water H sub 2 sub O , whereas its two product chemistry products are D ribose 5 phosphate and pyrimidine base . This enzyme belongs to the family of hydrolase s, specifically those glycosylases that hydrolyse N glycosyl compounds. The systematic name of this enzyme class is pyrimidine 5 nucleotide phosphoribo deoxyribo hydrolase . Other names in common use include pyrimidine nucleotide N ribosidase , and Pyr5N . This enzyme participates in pyrimidine metabolism . References reflist 1 cite journal author Imada A date 1967 title Degradation of pyrimidine nucleotides by enzyme systems of Streptomyces. II. Pyrimidine 5 nucleotide phosphoribo deoxyribo hydrolase of Streptomyces virginiae journal J. Gen. Appl. Microbiol. volume 13 pages 267&ndash 278 doi 10.2323 jgam.13.267 issue 3 cite journal author Imada A, Kuno M and Igarasi S date 1967 title Degradation of pyrimidine nucleotides by enzyme systems of Streptomyces. I. Ribose 5 phosphate formation from pyrimidine nucleotides journal J. Gen. Appl. Microbiol. volume 13 pages 255&ndash 265 hydrolase stub Category EC 3.2.2 Category Enzymes of unknown structure ... more details
G quadruplex es detection Hoogsteen base pair s , hairpins, Primer dimer self dimers and cross dimers in primer pairs. FastPCR has the capacity to handle long sequences and sets of nucleic acid or protein ... pyrimidine skew, linguistic sequence complexity the linguistic sequence complexity generation ... more details
of a class of single ringed chemical structures called pyrimidine s. Purines are complementary only with pyrimidines pyrimidinepyrimidine pairings are energetically unfavorable because the molecules ... unfavorable because the molecules are too close, leading to overlap repulsion. Purine pyrimidine base pairing of AT or GC results in proper duplex structure. The only other purine pyrimidine pairings ... of 10 Stacked Base Dimers. Comparison of Stacked and H Bonded Base Pairs journal Journal ... Acids with Purine and Pyrimidine Derived Neucleosides References Reflist 2 External links http ... more details
pyrimidine nucleoside hydrolase YeiK journal Acta Crystallogr. D volume 60 pages 524&ndash 7 pmid ... title Crystal structure to 1.7 a of the Escherichia coli pyrimidine nucleoside hydrolase YeiK, a novel ... more details
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