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Identification
HMDB Protein ID HMDBP01560
Secondary Accession Numbers
  • 6856
  • HMDBP05596
Name Cytochrome P450 1A2
Synonyms
  1. CYPIA2
  2. Cytochrome P(3)450
  3. Cytochrome P450 4
  4. Cytochrome P450-P3
Gene Name CYP1A2
Protein Type Unknown
Biological Properties
General Function Involved in monooxygenase activity
Specific Function Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It oxidizes a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. Most active in catalyzing 2-hydroxylation. Caffeine is metabolized primarily by cytochrome CYP1A2 in the liver through an initial N3-demethylation. Also acts in the metabolism of aflatoxin B1 and acetaminophen. Participates in the bioactivation of carcinogenic aromatic and heterocyclic amines. Catalizes the N-hydroxylation of heterocyclic amines and the O-deethylation of phenacetin.
Pathways
  • Acetaminophen Metabolism Pathway
  • Caffeine metabolism
  • Caffeine Metabolism
  • Chemical carcinogenesis
  • Clomipramine Metabolism Pathway
  • Clopidogrel Action Pathway
  • Clopidogrel Metabolism Pathway
  • Doxepin Metabolism Pathway
  • Drug metabolism - cytochrome P450
  • Imipramine Action Pathway
  • Imipramine Metabolism Pathway
  • Lidocaine (Antiarrhythmic) Action Pathway
  • Lidocaine (Local Anaesthetic) Action Pathway
  • Lidocaine (Local Anaesthetic) Metabolism Pathway
  • Linoleic acid metabolism
  • Metabolism of xenobiotics by cytochrome P450
  • Phenytoin (Antiarrhythmic) Action Pathway
  • Retinol metabolism
  • Tryptophan metabolism
Reactions
RH + reduced flavoprotein + Oxygen → ROH + oxidized flavoprotein + Water details
GO Classification
Biological Process
dibenzo-p-dioxin metabolic process
oxidative demethylation
hydrogen peroxide biosynthetic process
porphyrin-containing compound metabolic process
alkaloid metabolic process
cellular respiration
exogenous drug catabolic process
heterocycle metabolic process
monocarboxylic acid metabolic process
monoterpenoid metabolic process
oxidative deethylation
steroid catabolic process
toxin biosynthetic process
xenobiotic metabolic process
cellular response to cadmium ion
lung development
regulation of gene expression
methylation
post-embryonic development
Cellular Component
endoplasmic reticulum membrane
Function
ion binding
cation binding
metal ion binding
binding
catalytic activity
transition metal ion binding
electron carrier activity
iron ion binding
monooxygenase activity
heme binding
oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen
oxidoreductase activity
Molecular Function
electron carrier activity
aromatase activity
demethylase activity
caffeine oxidase activity
oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen
iron ion binding
heme binding
Process
metabolic process
oxidation reduction
Cellular Location
  1. Peripheral membrane protein
  2. Peripheral membrane protein
  3. Endoplasmic reticulum membrane
  4. Microsome membrane
Gene Properties
Chromosome Location 15
Locus 15q24.1
SNPs CYP1A2
Gene Sequence
>1548 bp
ATGGCATTGTCCCAGTCTGTTCCCTTCTCGGCCACAGAGCTTCTCCTGGCCTCTGCCATC
TTCTGCCTGGTATTCTGGGTGCTCAAGGGTTTGAGGCCTCGGGTCCCCAAAGGCCTGAAA
AGTCCACCAGAGCCATGGGGCTGGCCCTTGCTCGGGCATGTGCTGACCCTGGGGAAGAAC
CCGCACCTGGCACTGTCAAGGATGAGCCAGCGCTACGGGGACGTCCTGCAGATCCGCATT
GGCTCCACGCCCGTGCTGGTGCTGAGCCGCCTGGACACCATCCGGCAGGCCCTGGTGCGG
CAGGGCGACGATTTCAAGGGCCGGCCTGACCTCTACACCTCCACCCTCATCACTGATGGC
CAGAGCTTGACCTTCAGCACAGACTCTGGACCGGTGTGGGCTGCCCGCCGGCGCCTGGCC
CAGAATGCCCTCAACACCTTCTCCATCGCCTCTGACCCAGCTTCCTCATCCTCCTGCTAC
CTGGAGGAGCATGTGAGCAAGGAGGCTAAGGCCCTGATCAGCAGGTTGCAGGAGCTGATG
GCAGGGCCTGGGCACTTCGACCCTTACAATCAGGTGGTGGTGTCAGTGGCCAACGTCATT
GGTGCCATGTGCTTCGGACAGCACTTCCCTGAGAGTAGCGATGAGATGCTCAGCCTCGTG
AAGAACACTCATGAGTTCGTGGAGACTGCCTCCTCCGGGAACCCCCTGGACTTCTTCCCC
ATCCTTCGCTACCTGCCTAACCCTGCCCTGCAGAGGTTCAAGGCCTTCAACCAGAGGTTC
CTGTGGTTCCTGCAGAAAACAGTCCAGGAGCACTATCAGGACTTTGACAAGAACAGTGTC
CGGGACATCACGGGTGCCCTGTTCAAGCACAGCAAGAAGGGGCCTAGAGCCAGCGGCAAC
CTCATCCCACAGGAGAAGATTGTCAACCTTGTCAATGACATCTTTGGAGCAGGATTTGAC
ACAGTCACCACAGCCATCTCCTGGAGCCTCATGTACCTTGTGACCAAGCCTGAGATACAG
AGGAAGATCCAGAAGGAGCTGGACACTGTGATTGGCAGGGAGCGGCGGCCCCGGCTCTCT
GACAGACCCCAGCTGCCCTACTTGGAGGCCTTCATCCTGGAGACCTTCCGACACTCCTCC
TTCTTGCCCTTCACCATCCCCCACAGCACAACAAGGGACACAACGCTGAATGGCTTCTAC
ATCCCCAAGAAATGCTGTGTCTTCGTAAACCAGTGGCAGGTCAACCATGACCCAGAGCTG
TGGGAGGACCCCTCTGAGTTCCGGCCTGAGCGGTTCCTCACCGCCGATGGCACTGCCATT
AACAAGCCCTTGAGTGAGAAGATGATGCTGTTTGGCATGGGCAAGCGCCGGTGTATCGGG
GAAGTCCTGGCCAAGTGGGAGATCTTCCTCTTCCTGGCCATCCTGCTACAGCAACTGGAG
TTCAGCGTGCCGCCGGGCGTGAAAGTCGACCTGACCCCCATCTACGGGCTGACCATGAAG
CACGCCCGCTGTGAACATGTCCAGGCGCGGCGCTTCTCCATCAATTGA
Protein Properties
Number of Residues 515
Molecular Weight 58406.915
Theoretical pI 9.049
Pfam Domain Function
Signals Not Available
Transmembrane Regions Not Available
Protein Sequence
>Cytochrome P450 1A2
MALSQSVPFSATELLLASAIFCLVFWVLKGLRPRVPKGLKSPPEPWGWPLLGHVLTLGKN
PHLALSRMSQRYGDVLQIRIGSTPVLVLSRLDTIRQALVRQGDDFKGRPDLYTSTLITDG
QSLTFSTDSGPVWAARRRLAQNALNTFSIASDPASSSSCYLEEHVSKEAKALISRLQELM
AGPGHFDPYNQVVVSVANVIGAMCFGQHFPESSDEMLSLVKNTHEFVETASSGNPLDFFP
ILRYLPNPALQRFKAFNQRFLWFLQKTVQEHYQDFDKNSVRDITGALFKHSKKGPRASGN
LIPQEKIVNLVNDIFGAGFDTVTTAISWSLMYLVTKPEIQRKIQKELDTVIGRERRPRLS
DRPQLPYLEAFILETFRHSSFLPFTIPHSTTRDTTLNGFYIPKKCCVFVNQWQVNHDPEL
WEDPSEFRPERFLTADGTAINKPLSEKMMLFGMGKRRCIGEVLAKWEIFLFLAILLQQLE
FSVPPGVKVDLTPIYGLTMKHARCEHVQARRFSIN
GenBank ID Protein 30339
UniProtKB/Swiss-Prot ID P05177
UniProtKB/Swiss-Prot Entry Name CP1A2_HUMAN
PDB IDs
GenBank Gene ID Z00036
GeneCard ID CYP1A2
GenAtlas ID CYP1A2
HGNC ID HGNC:2596
References
General References
  1. Gerhard DS, Wagner L, Feingold EA, Shenmen CM, Grouse LH, Schuler G, Klein SL, Old S, Rasooly R, Good P, Guyer M, Peck AM, Derge JG, Lipman D, Collins FS, Jang W, Sherry S, Feolo M, Misquitta L, Lee E, Rotmistrovsky K, Greenhut SF, Schaefer CF, Buetow K, Bonner TI, Haussler D, Kent J, Kiekhaus M, Furey T, Brent M, Prange C, Schreiber K, Shapiro N, Bhat NK, Hopkins RF, Hsie F, Driscoll T, Soares MB, Casavant TL, Scheetz TE, Brown-stein MJ, Usdin TB, Toshiyuki S, Carninci P, Piao Y, Dudekula DB, Ko MS, Kawakami K, Suzuki Y, Sugano S, Gruber CE, Smith MR, Simmons B, Moore T, Waterman R, Johnson SL, Ruan Y, Wei CL, Mathavan S, Gunaratne PH, Wu J, Garcia AM, Hulyk SW, Fuh E, Yuan Y, Sneed A, Kowis C, Hodgson A, Muzny DM, McPherson J, Gibbs RA, Fahey J, Helton E, Ketteman M, Madan A, Rodrigues S, Sanchez A, Whiting M, Madari A, Young AC, Wetherby KD, Granite SJ, Kwong PN, Brinkley CP, Pearson RL, Bouffard GG, Blakesly RW, Green ED, Dickson MC, Rodriguez AC, Grimwood J, Schmutz J, Myers RM, Butterfield YS, Griffith M, Griffith OL, Krzywinski MI, Liao N, Morin R, Palmquist D, Petrescu AS, Skalska U, Smailus DE, Stott JM, Schnerch A, Schein JE, Jones SJ, Holt RA, Baross A, Marra MA, Clifton S, Makowski KA, Bosak S, Malek J: The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC). Genome Res. 2004 Oct;14(10B):2121-7. [PubMed:15489334 ]
  2. Solus JF, Arietta BJ, Harris JR, Sexton DP, Steward JQ, McMunn C, Ihrie P, Mehall JM, Edwards TL, Dawson EP: Genetic variation in eleven phase I drug metabolism genes in an ethnically diverse population. Pharmacogenomics. 2004 Oct;5(7):895-931. [PubMed:15469410 ]
  3. Corchero J, Pimprale S, Kimura S, Gonzalez FJ: Organization of the CYP1A cluster on human chromosome 15: implications for gene regulation. Pharmacogenetics. 2001 Feb;11(1):1-6. [PubMed:11207026 ]
  4. Quattrochi LC, Okino ST, Pendurthi UR, Tukey RH: Cloning and isolation of human cytochrome P-450 cDNAs homologous to dioxin-inducible rabbit mRNAs encoding P-450 4 and P-450 6. DNA. 1985 Oct;4(5):395-400. [PubMed:3000715 ]
  5. Jiang Z, Dalton TP, Jin L, Wang B, Tsuneoka Y, Shertzer HG, Deka R, Nebert DW: Toward the evaluation of function in genetic variability: characterizing human SNP frequencies and establishing BAC-transgenic mice carrying the human CYP1A1_CYP1A2 locus. Hum Mutat. 2005 Feb;25(2):196-206. [PubMed:15643613 ]
  6. Jaiswal AK, Nebert DW, Gonzalez FJ: Human P3(450): cDNA and complete amino acid sequence. Nucleic Acids Res. 1986 Aug 26;14(16):6773-4. [PubMed:3755823 ]
  7. Quattrochi LC, Pendurthi UR, Okino ST, Potenza C, Tukey RH: Human cytochrome P-450 4 mRNA and gene: part of a multigene family that contains Alu sequences in its mRNA. Proc Natl Acad Sci U S A. 1986 Sep;83(18):6731-5. [PubMed:3462722 ]
  8. Ikeya K, Jaiswal AK, Owens RA, Jones JE, Nebert DW, Kimura S: Human CYP1A2: sequence, gene structure, comparison with the mouse and rat orthologous gene, and differences in liver 1A2 mRNA expression. Mol Endocrinol. 1989 Sep;3(9):1399-408. [PubMed:2575218 ]
  9. Jaiswal AK, Nebert DW, McBride OW, Gonzalez FJ: Human P(3)450: cDNA and complete protein sequence, repetitive Alu sequences in the 3' nontranslated region, and localization of gene to chromosome 15. J Exp Pathol. 1987 Winter;3(1):1-17. [PubMed:3681487 ]
  10. Wrighton SA, Campanile C, Thomas PE, Maines SL, Watkins PB, Parker G, Mendez-Picon G, Haniu M, Shively JE, Levin W, et al.: Identification of a human liver cytochrome P-450 homologous to the major isosafrole-inducible cytochrome P-450 in the rat. Mol Pharmacol. 1986 Apr;29(4):405-10. [PubMed:3517618 ]
  11. Zhou H, Josephy PD, Kim D, Guengerich FP: Functional characterization of four allelic variants of human cytochrome P450 1A2. Arch Biochem Biophys. 2004 Feb 1;422(1):23-30. [PubMed:14725854 ]
  12. Sansen S, Yano JK, Reynald RL, Schoch GA, Griffin KJ, Stout CD, Johnson EF: Adaptations for the oxidation of polycyclic aromatic hydrocarbons exhibited by the structure of human P450 1A2. J Biol Chem. 2007 May 11;282(19):14348-55. Epub 2007 Feb 20. [PubMed:17311915 ]
  13. Huang JD, Guo WC, Lai MD, Guo YL, Lambert GH: Detection of a novel cytochrome P-450 1A2 polymorphism (F21L) in Chinese. Drug Metab Dispos. 1999 Jan;27(1):98-101. [PubMed:9884316 ]
  14. Chevalier D, Cauffiez C, Allorge D, Lo-Guidice JM, Lhermitte M, Lafitte JJ, Broly F: Five novel natural allelic variants-951A>C, 1042G>A (D348N), 1156A>T (I386F), 1217G>A (C406Y) and 1291C>T (C431Y)-of the human CYP1A2 gene in a French Caucasian population. Hum Mutat. 2001 Apr;17(4):355-6. [PubMed:11295848 ]
  15. Murayama N, Soyama A, Saito Y, Nakajima Y, Komamura K, Ueno K, Kamakura S, Kitakaze M, Kimura H, Goto Y, Saitoh O, Katoh M, Ohnuma T, Kawai M, Sugai K, Ohtsuki T, Suzuki C, Minami N, Ozawa S, Sawada J: Six novel nonsynonymous CYP1A2 gene polymorphisms: catalytic activities of the naturally occurring variant enzymes. J Pharmacol Exp Ther. 2004 Jan;308(1):300-6. Epub 2003 Oct 16. [PubMed:14563787 ]
  16. Soyama A, Saito Y, Hanioka N, Maekawa K, Komamura K, Kamakura S, Kitakaze M, Tomoike H, Ueno K, Goto Y, Kimura H, Katoh M, Sugai K, Saitoh O, Kawai M, Ohnuma T, Ohtsuki T, Suzuki C, Minami N, Kamatani N, Ozawa S, Sawada J: Single nucleotide polymorphisms and haplotypes of CYP1A2 in a Japanese population. Drug Metab Pharmacokinet. 2005 Feb;20(1):24-33. [PubMed:15770072 ]
  17. Cornelis MC, El-Sohemy A, Kabagambe EK, Campos H: Coffee, CYP1A2 genotype, and risk of myocardial infarction. JAMA. 2006 Mar 8;295(10):1135-41. [PubMed:16522833 ]