CYP2A6

Last updated
CYP2A6
Protein CYP2A6 PDB 1z10.png
Available structures
PDB Ortholog search: PDBe RCSB
Identifiers
Aliases CYP2A6 , CPA6, CYP2A, CYP2A3, CYPIIA6, P450C2A, P450PB, cytochrome P450 family 2 subfamily A member 6
External IDs OMIM: 122720 MGI: 88597 HomoloGene: 85917 GeneCards: CYP2A6
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_000762

NM_007812

RefSeq (protein)

NP_000753

n/a

Location (UCSC) Chr 19: 40.84 – 40.85 Mb Chr 7: 26.53 – 26.54 Mb
PubMed search [3] [4]
Wikidata
View/Edit Human View/Edit Mouse

Cytochrome P450 2A6 (abbreviated CYP2A6) is a member of the cytochrome P450 mixed-function oxidase system, which is involved in the metabolism of xenobiotics in the body. CYP2A6 is the primary enzyme responsible for the oxidation of nicotine and cotinine. It is also involved in the metabolism of several pharmaceuticals, carcinogens, and a number of coumarin-type alkaloids. CYP2A6 is the only enzyme in the human body that appreciably catalyzes the 7-hydroxylation of coumarin, such that the formation of the product of this reaction, 7-hydroxycoumarin, is used as a probe for CYP2A6 activity.

The CYP2A6 gene is part of a large cluster of cytochrome P450 genes from the CYP2A, CYP2B and CYP2F subfamilies on chromosome 19q. The gene was formerly referred to as CYP2A3; however, it has been renamed CYP2A6. [5]

Interactive pathway map

Click on genes, proteins and metabolites below to link to respective articles. [§ 1]

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FluoropyrimidineActivity WP1601.png go to articlego to articlego to articlego to pathway articlego to pathway articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to pathway articlego to pathway articlego to articlego to articlego to articlego to articlego to articlego to WikiPathwaysgo to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to article
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FluoropyrimidineActivity WP1601.png go to articlego to articlego to articlego to pathway articlego to pathway articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to pathway articlego to pathway articlego to articlego to articlego to articlego to articlego to articlego to WikiPathwaysgo to articlego to articlego to articlego to articlego to articlego to articlego to articlego to articlego to article
|alt=Fluorouracil (5-FU) Activity edit]]
Fluorouracil (5-FU) Activity edit
  1. The interactive pathway map can be edited at WikiPathways: "FluoropyrimidineActivity_WP1601".

Distribution

CYP2A6 localizes to the endoplasmic reticulum and is found predominantly in the liver.

Variability

Significant interindividual variability in CYP2A6 apoprotein and mRNA levels has been observed.

Induction

CYP2A6 is known to be inducible by phenobarbital and rifampicin, and it is suspected that other antiepileptic drugs may also have this effect.

CYP2A6 Ligands

Selected inducers, inhibitors and substrates of CYP2A6
SubstratesInhibitorsInducers

See also

Related Research Articles

<span class="mw-page-title-main">CYP3A4</span> Enzyme that metabolizes substances by oxidation

Cytochrome P450 3A4 is an important enzyme in the body, mainly found in the liver and in the intestine, which in humans is encoded by CYP3A4 gene. It oxidizes small foreign organic molecules (xenobiotics), such as toxins or drugs, so that they can be removed from the body. It is highly homologous to CYP3A5, another important CYP3A enzyme.

<span class="mw-page-title-main">CYP2E1</span> Protein-coding gene in the species Homo sapiens

Cytochrome P450 2E1 is a member of the cytochrome P450 mixed-function oxidase system, which is involved in the metabolism of xenobiotics in the body. This class of enzymes is divided up into a number of subcategories, including CYP1, CYP2, and CYP3, which as a group are largely responsible for the breakdown of foreign compounds in mammals.

<span class="mw-page-title-main">CYP1A2</span> Enzyme in the human body

Cytochrome P450 1A2, a member of the cytochrome P450 mixed-function oxidase system, is involved in the metabolism of xenobiotics in the human body. In humans, the CYP1A2 enzyme is encoded by the CYP1A2 gene.

<span class="mw-page-title-main">CYP2C9</span> Enzyme protein

Cytochrome P450 family 2 subfamily C member 9 is an enzyme protein. The enzyme is involved in the metabolism, by oxidation, of both xenobiotics, including drugs, and endogenous compounds, including fatty acids. In humans, the protein is encoded by the CYP2C9 gene. The gene is highly polymorphic, which affects the efficiency of the metabolism by the enzyme.

<span class="mw-page-title-main">CYP2C8</span> Gene-coded protein involved in metabolism of xenobiotics

Cytochrome P4502C8 (CYP2C8) is a member of the cytochrome P450 mixed-function oxidase system involved in the metabolism of xenobiotics in the body. Cytochrome P4502C8 also possesses epoxygenase activity, i.e. it metabolizes long-chain polyunsaturated fatty acids, e.g. arachidonic acid, eicosapentaenoic acid, docosahexaenoic acid, and Linoleic acid to their biologically active epoxides.

Omega oxidation (ω-oxidation) is a process of fatty acid metabolism in some species of animals. It is an alternative pathway to beta oxidation that, instead of involving the β carbon, involves the oxidation of the ω carbon. The process is normally a minor catabolic pathway for medium-chain fatty acids, but becomes more important when β oxidation is defective.

<span class="mw-page-title-main">CYP2B6</span> Protein-coding gene in the species Homo sapiens

Cytochrome P450 2B6 is an enzyme that in humans is encoded by the CYP2B6 gene. CYP2B6 is a member of the cytochrome P450 group of enzymes. Along with CYP2A6, it is involved with metabolizing nicotine, along with many other substances.

In enzymology, an unspecific monooxygenase (EC 1.14.14.1) is an enzyme that catalyzes the chemical reaction

<span class="mw-page-title-main">CYP3A5</span> Enzyme involved in drug metabolism

Cytochrome P450 3A5 is a protein that in humans is encoded by the CYP3A5 gene.

<span class="mw-page-title-main">CYP4A11</span> Protein-coding gene in the species Homo sapiens

Cytochrome P450 4A11 is a protein that in humans is codified by the CYP4A11 gene.

<span class="mw-page-title-main">CYP26A1</span> Protein-coding gene in the species Homo sapiens

Cytochrome P450 26A1 is a protein that in humans is encoded by the CYP26A1 gene.

<span class="mw-page-title-main">CYP4F2</span> Enzyme protein in the species Homo sapiens

Cytochrome P450 4F2 is a protein that in humans is encoded by the CYP4F2 gene. This protein is an enzyme, a type of protein that catalyzes chemical reactions inside cells. This specific enzyme is part of the superfamily of cytochrome P450 (CYP) enzymes, and the encoding gene is part of a cluster of cytochrome P450 genes located on chromosome 19.

<span class="mw-page-title-main">CYP2A13</span> Protein-coding gene in the species Homo sapiens

Cytochrome P450 2A13 is a protein that in humans is encoded by the CYP2A13 gene.

<span class="mw-page-title-main">CYP7B1</span> Protein-coding gene in the species Homo sapiens

25-hydroxycholesterol 7-alpha-hydroxylase also known as oxysterol and steroid 7-alpha-hydroxylase is an enzyme that in humans is encoded by the CYP7B1 gene. This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids.

<span class="mw-page-title-main">CYP2F1</span> Protein-coding gene in the species Homo sapiens

Cytochrome P450 2F1 is a protein that in humans is encoded by the CYP2F1 gene.

<span class="mw-page-title-main">CYP4Z1</span> Protein-coding gene in the species Homo sapiens

CYP4Z1 is a protein that in humans is encoded by the CYP4Z1 gene.

<span class="mw-page-title-main">CYP4F22</span> Protein-coding gene in the species Homo sapiens

CYP4F22 is a protein that in humans is encoded by the CYP4F22 gene.

<span class="mw-page-title-main">CYP4F11</span> Protein-coding gene in the species Homo sapiens

CYP4F11 is a protein that in humans is encoded by the CYP4F11 gene. This gene encodes a member of the cytochrome P450 superfamily of enzymes. The cytochrome P450 proteins are monooxygenases which catalyze many reactions involved in drug metabolism and synthesis of cholesterol, steroids and other lipids. This gene is part of a cluster of cytochrome P450 genes on chromosome 19. Another member of this family, CYP4F2, is approximately 16 kb away. Alternatively spliced transcript variants encoding the same protein have been found for this gene.

<span class="mw-page-title-main">CYP2U1</span> Protein-coding gene in the species Homo sapiens

CYP2U1 is a protein that in humans is encoded by the CYP2U1 gene

<span class="mw-page-title-main">CYP2A7</span> Protein-coding gene in the species Homo sapiens

CYP2A7 is a protein that in humans is encoded by the CYP2A7 gene.

References

  1. 1 2 3 GRCh38: Ensembl release 89: ENSG00000255974 - Ensembl, May 2017
  2. 1 2 3 GRCm38: Ensembl release 89: ENSMUSG00000005547 - Ensembl, May 2017
  3. "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. PD-icon.svg This article incorporates public domain material from "Entrez Gene: CYP2A6 cytochrome P450, family 2, subfamily A, polypeptide 6". Reference Sequence collection . National Center for Biotechnology Information.
  6. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 Lacy CF, Armstrong LL, Goldman MP, Lance LL (2007). Cytochrome P450 Enzymes: Substrates, Inhibitors, and Inducers. Hudson, OH: LexiComp Inc. pp. 1899–1912.
  7. Wen X, Wang JS, Neuvonen PJ, Backman JT (2002). "Isoniazid is a mechanism-based inhibitor of cytochrome P450 1A2, 2A6, 2C19 and 3A4 isoforms in human liver microsomes". Eur. J. Clin. Pharmacol. 57 (11): 799–804. doi:10.1007/s00228-001-0396-3. PMID   11868802. S2CID   19299097.
  8. Siu EC, Tyndale RF (2008). "Selegiline is a mechanism-based inactivator of CYP2A6 inhibiting nicotine metabolism in humans and mice". J. Pharmacol. Exp. Ther. 324 (3): 992–9. doi:10.1124/jpet.107.133900. PMID   18065502. S2CID   9833233.

Further reading