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
Image DNA UV mutation.svg thumb right 300px DNA Lesion Thymine Dimer Pyrimidine dimers are molecular lesion s formed from thymine or cytosine bases in DNA via photochemical reaction s. ref cite journal title The Molecular Perspective Ultraviolet Light and Pyrimidine Dimers author David S. Goodsell journal The Oncologist volume 6 issue 3 pages 298 299 year 2001 url http theoncologist.alphamedpress.org cgi content full 6 3 298 doi 10.1634 theoncologist.6 3 298 pmid 11423677 ref ref cite book title DNA repair and mutagenesis author E. C. Friedberg, G. C. Walker, W. Siede, R. D. Wood, R. A. Schultz and T. Ellenberger publisher ASM Press place Washington issue year 2006 url isbn 978 1555813192 page 1118 ref Ultraviolet light induces the formation of covalent bond covalent linkages by reactions localized on the C C double bonds. ref cite journal title Effect of photoreactivating light on UV radiation induced alterations in human skin author S. E. Whitmore, C. S. Potten, C. A. Chadwick, P. T. Strickland ... also accumulate as a result of UV radiation. Two common UV products are cyclobutane pyrimidine dimers ... or nucleotide excision repair, but unrepaired dimers are mutagenic. Pyrimidine dimers .... Right Cyclobutane pyrimidine dimer. A cyclobutane pyrimidine dimer CPD contains a four membered ... Type Pyrimidine Dimers in Polynucleotides author R. B. Setlow pmid 5328566 ref ref cite web ..., or 6,4 pyrimidine pyrimidones, occur at one third the frequency of CPDs but are more mutagenic. ref ... polymerase s frequently introduce mutations at pyrimidine dimers, both in prokaryotes SOS mutagenesis ... DNA repair Image melanoma.jpg thumb right 300px Melanoma type of skin cancer Pyrimidine dimers introduce ... enables the photochemical reactions to occur, which results in the elimination of the pyrimidine ... pyrimidine dimers 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 pyrimidine ... 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
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
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
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
unreferenced date November 2010 protein name dihydropyrimidine dehydrogenase caption image width HGNCid 3012 Symbol DPYD AltSymbols EntrezGene 1806 OMIM 274270 RefSeq NM 000110 UniProt PDB ECnumber 1.3.1.2 Chromosome 1 Arm p Band 22 LocusSupplementaryData Dihydropyrimidine dehydrogenase DPD is an enzyme that is involved in pyrimidine degradation. It is the initial and rate limiting step in pyrimidine catabolism. It catalyzes the reduction of uracil and thymine . It is also involved in the degradation of the chemotherapeutic drugs 5 fluorouracil and Tegafur uracil . See also Dihydropyrimidine dehydrogenase deficiency External links enzyme stub Nucleotide metabolism de Dihydropyrimidin Dehydrogenase ... more details
acid inhibit the hydrolysis of barbituric acid. Dihydro L orotate is an intermediate in the pyrimidine ... acid inhibits multiple enzyme s that are involved in de novo pyrimidine synthesis. These last two points suggest a connection between pyrimidine anabolism and oxidative catabolism. Image with unknown ... of oxidative pyrimidine metabolism has not yet been discovered in mammals. References ... in oxidative pyrimidine metabolism analysis of the barbiturase reaction and discovery of a novel enzyme ... S title Barbiturase, a novel zinc containing amidohydrolase involved in oxidative pyrimidine metabolism ... more details
Circular molecules of DNA , such as plasmids and typical mitochondrial genome s, consist of Nucleic acid double helix two strands of DNA called the heavy strand or H strand and the light strand or L strand . The two strands have different masses due to different proportions of heavier nucleic acid s. While this difference is not known to have any functional significance, it can be used in the laboratory to segregate the strands of Denaturation biochemistry Nucleic acid denaturation denatured DNA, and hence to analyze the strands separately. Adenine and guanine purine s are heavier than cytosine and thymine pyrimidine s due to their extra ring. Because a purine always DNA Base pairing pairs with a pyrimidine, any excess of purines in one strand will occur with a corresponding excess of pyrimidines in the other strand and vice versa. Statistically, there is more likely to be such an imbalance than an exact 50 50 ratio. In addition, bias may arise due to differentials in the amount of protein coding sequence on each strand, as codon s do not all occur with equal frequency. Category DNA biology stub ... more details
S, Saccucci F, Magni G title Human erythrocyte pyrimidine 5 nucleotidase, PN I, is identical to p36 ... summary text Pyrimidine 5 prime nucleotidase P5N EC 3.1.3.5 , also called uridine 5 prime monophosphate hydrolase UMPH , catalyzes the dephosphorylation of the pyrimidine 5 prime monophosphates UMP and CMP to the corresponding nucleosides. There are 2 isozymes of pyrimidine 5 prime nucleotidase in red ... pyrimidine nucleotidase from human erythrocytes enzymic and molecular properties journal Biochem. J ... doi 10.1101 gr.6.9.807 cite journal author Amici A, Emanuelli M, Magni G, et al. title Pyrimidine nucleotidases from human erythrocyte possess phosphotransferase activities specific for pyrimidine nucleotides .... title Genetic basis of hemolytic anemia caused by pyrimidine 5 nucleotidase deficiency journal Blood ... author Amici A, Magni G title Human erythrocyte pyrimidine 5 nucleotidase, PN I journal Arch. Biochem ... enzyme intermediate in phosphotransferase activity of human red cell pyrimidine nucleotidases ... N, et al. title Molecular characterization of Turkish patients with pyrimidine 5 nucleotidase ... of six unrelated Italian patients affected by pyrimidine 5 nucleotidase deficiency journal Br ... of pyrimidine 5 nucleotidase deficiency journal Br. J. Haematol. volume 126 issue 2 pages 265 ... LR, Bianchi P, Fermo E, et al. title Functional analysis of pyrimidine 5 nucleotidase mutants ... more details
A salvage pathway is a Metabolic pathway pathway in which nucleotide s purine and pyrimidine are synthesized from intermediates in the degradative pathway for nucleotides. Salvage pathways are used to recover bases and nucleosides that are formed during biodegradation degradation of RNA and DNA . This is important in some organs because some tissues cannot undergo de novo synthesis . The salvaged bases and nucleosides can then be converted back into nucleotides. Substrates The salvage pathway requires distinct substrates Pyrimidines Uridine phosphorylase adds ribose 1 phosphate to the free base uracil, forming uridine monophosphate. Uridine kinase then phosphorylates this nucleoside into its diphosphate and triphosphate forms. Deoxythymidine phosphorylase adds deoxyribose 1 phosphate to thymine, forming deoxythymidine monophosphate. Thymidine kinase can then phosphorylate this compound to deoxythymidine diphosphate and triphosphate. Image Pyrimidine Ribonucleotide Salvage.png thumb none 400px The salvage of pyrimidine ribonucleotides. Purines Phosphoribosyltransferases add activated ribose 5 phosphate called phosphoribosyl pyrophosphate or PRPP to bases, creating nucleotide monophosphates. There are two types of phosphoribosyltransferases adenine phosphoribosyltransferase APRT and hypoxanthine guanine phosphoribosyltransferase HGPRT . Lesch Nyhan syndrome is associated with a deficiency of HGPRT. class wikitable Nucleoside Enzyme Nucleotide hypoxanthine hypoxanthine guanine phosphoribosyl transferase HGPRT Inosine monophosphate IMP guanine hypoxanthine guanine phosphoribosyl transferase HGPRT Guanosine monophosphate GMP adenine adenine phosphoribosyltransferase APRT Adenosine monophosphate AMP External links http www.chem.brandeis.edu pochapsky research.html Enzymes in the methionine salvage pathway structure and function at Brandeis University Category Genetics genetics stub Protein metabolism Nucleotide metabolism ca Salvament de nucle tids de Salvage Pathway ja ... more details
enzyme Name diaminohydroxyphosphoribosylaminopyrimidine deaminase EC number 3.5.4.26 CAS number 68994 19 4 IUBMB EC number 3 5 4 26 GO code 0008835 image width caption In enzymology , a diaminohydroxyphosphoribosylaminopyrimidine deaminase EC number 3.5.4.26 is an enzyme that catalysis catalyzes the chemical reaction 2,5 diamino 6 hydroxy 4 5 phosphoribosylamino pyrimidine H sub 2 sub O math rightleftharpoons math 5 amino 6 5 phosphoribosylamino uracil NH sub 3 sub Thus, the two substrate biochemistry substrates of this enzyme are 2,5 diamino 6 hydroxy 4 5 phosphoribosylamino pyrimidine and water H sub 2 sub O , whereas its two product chemistry products are 5 amino 6 5 phosphoribosylamino uracil and ammonia NH sub 3 sub . This enzyme belongs to the family of hydrolase s, those acting on carbon nitrogen bonds other than peptide bonds specifically in cyclic amidines . The systematic name of this enzyme class is 2,5 diamino 6 hydroxy 4 5 phosphoribosylamino pyrimidine 2 aminohydrolase . This enzyme participates in riboflavin metabolism . Structural studies As of late 2007, 6 tertiary structure structures have been solved for this class of enzymes, with Protein Data Bank PDB accession codes PDB link 2B3Z , PDB link 2D5N , PDB link 2G6V , PDB link 2HXV , PDB link 2O7P , and PDB link 2OBC . References reflist 1 cite journal author Burrows RB, Brown GM date 1978 title Presence of Escherichia coli of a deaminase and a reductase involved in biosynthesis of riboflavin journal J. Bacteriol. volume 136 pages 657&ndash 67 pmid 30756 issue 2 pmc 218591 hydrolase stub Category EC 3.5.4 Category Enzymes of known structure ... 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
Unreferenced date December 2009 Hamilton O. Smith H.O. Smith , K.W. Wilcox, and T.J. Kelley, working at Johns Hopkins University in 1968, isolated and characterized the first restriction nuclease whose functioning depended on a specific DNA nucleotide sequence. Citation needed date September 2011 Working with Haemophilus influenzae bacteria, this group isolated an enzyme , called HindII, that always cut DNA molecules at a particular point within a specific sequence of six base pairs. Citation needed date September 2011 This sequence is 5 G T pyrimidine T or C purine A or G A C 3 P3 C A purine A or G pyrimidine T or C T G 5 They found that the HindII enzyme always cuts directly in the center of this sequence. Citation needed date September 2011 Wherever this particular sequence of six base pairs occurs unmodified in a DNA molecule, HindII will cleave both DNA backbones between the 3rd and 4th base pairs of the sequence. Moreover, HindII will only cleave a DNA molecule at this particular site. For this reason, this specific base sequence is known as the recognition sequence for HindII. See also Nuclease HindIII DEFAULTSORT Hindii Category Molecular biology Category Biotechnology Category Restriction enzymes Category EC 3.1 es HindII ... more details
protein Name carbamoyl phosphate synthetase 2, aspartate transcarbamylase, and dihydroorotase caption image width HGNCid 1424 Symbol CAD AltSymbols EntrezGene 790 OMIM 114010 RefSeq NM 004341 UniProt P27708 PDB ECnumber Chromosome 2 Arm p Band 21 LocusSupplementaryData Carbamoyl phosphate synthetase II is an enzyme that catalyzes the reactions that produce carbamoyl phosphate in the cytosol as opposed to type I, which functions in the mitochondria . In pyrimidine biosynthesis, it catalyzes the following reaction Glutamine Gln CO sub 2 sub 2 ATP H sub 2 sub O carbamoyl phosphate Glutamate Glu 2 ADP P sub i sub It is activated by Adenosine triphosphate ATP and PRPP and it is inhibited by UMP Uridine monophosphate , the end product of the pyrimidine synthesis pathway . Both CPSI and CPSII do not require Biotin as a coenzyme, as seen with most carboxylation reactions. It is one of the three enzyme functions coded by the CAD gene. It is classified under EC number 6.3.5.5 . External links MeshName Carbamoyl Phosphate Synthase Glutamine Hydrolyzing enzyme stub Ligases Nucleotide metabolism Multienzyme complexes pl Syntetaza karbamoilofosforanowa II ... more details
Infobox rfam Name PyrR binding site image RF00515.jpg width caption Predicted secondary structure and sequence conservation of PyrR Symbol PyrR AltSymbols Rfam RF00515 miRBase miRBase family RNA type Cis regulatory element Cis reg Tax domain Bacteria GO SO SO 0000233 CAS number EntrezGene HGNCid OMIM PDB RefSeq Chromosome Arm Band LocusSupplementaryData The PyrR binding site is an cis regulatory element RNA element that is found upstream of a variety of genes involved in pyrimidine biosynthesis and transport. ref name Bon01 cite journal last Bonner first ER coauthors D Elia JN, Billips BK, Switzer RL year 2001 title Molecular recognition of pyr mRNA by the Bacillus subtilis attenuation regulatory protein PyrR journal Nucleic Acids Res volume 29 pages 4851&ndash 4865 pmid 11726695 doi 10.1093 nar 29.23.4851 issue 23 pmc 96680 ref The RNA secondary structure structure permits binding of PyrR protein which regulates pyrimidine biosynthesis in Bacillus subtilis . When the protein binds, a downstream Intrinsic termination terminator hairpin forms, repressing transcription genetics transcription of biosynthesis genes. ref name Bon01 References reflist 1 External links Rfam id RF00515 name PyrR binding site Category Cis regulatory RNA elements molecular cell biology stub ... more details
Context date October 2009 URA3 is gene on Chromosome V in Saccharomyces yeast . Its systematic name is YEL021W. URA3 is a gene that encodes orotidine 5 phosphate decarboxylase ODCase , which is an enzyme that catalyzes one reaction involved in the synthesis of pyrimidine ribonucleotides in yeast RNA. Loss of ODCase activity leads to a lack of cell growth unless uracil or uridine is added to the media. When the URA3 gene is added, auxotrophic bacteria can now grow positive selection . In contrast, if 5 FOA 5 Fluoroorotic acid is added to the media, the ODCase of prototrophic bacteria can convert 5 FOA into the toxic compound a suicide inhibitor 5 fluorouracil causing death negative selection . Since URA3 allows for both positive and negative selection, it has been developed as a genetic marker for DNA transformations and other genetic techniques in bacteria and many fungal species. It is one of the most important genetic markers in yeast genetic modification. References S. cerevisiae database 2005 URA3 gene. http db.yeastgenome.org cgi bin locus.pl?locus ura3 summaryParagraph accessed 16 10 07 . PAUL J. FLYNN AND RICHARD J. REECE. Activation of Transcription by Metabolic Intermediates of the Pyrimidine Biosynthetic Pathway. MOLECULAR AND CELLULAR BIOLOGY,Vol. 19, No. 1, 882 888 Category Molecular biology ... more details
chembox verifiedrevid 385317369 Name 4 Pyrimidone ImageFile Pyrimidone.png ImageSize 120px IUPACName Pyrimidone OtherNames Hydroxypyrimidine Pyrimidinone Section1 Chembox Identifiers CASNo 51953 17 4 PubChem 20695 SMILES O C1NC NC C1 Section2 Chembox Properties C 4 H 4 N 2 O 1 Appearance White to light yellow powder Density MeltingPt 163 168 C BoilingPt Solubility Section3 Chembox Hazards MainHazards Respiratory system, eye, skin irritation FlashPt Autoignition Pyrimidone is the name given to either of two heterocyclic compound s with the formula Carbon C sub 4 sub Hydrogen H sub 4 sub Nitrogen N sub 2 sub Oxygen O 2 pyrimidone and 4 pyrimidone . The compounds can also be called 2 hydroxypyrimidine or 4 hydroxypyrimidine respectively, based on a Substitution reaction substituted pyrimidine , or 1,3 diazine , ring. Derivatives Derivatives of pyrimidone are the basis of many other biological molecules, including Nucleobases , such as cytosine Barbiturates , such as metharbital gallery File Cytosine chemical structure.png Cytosine File Metharbital.png Metharbital gallery See also Pyrimidine Category Pyrimidones Heterocyclic stub fa zh ... more details
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