General Information of Drug-Metabolizing Enzyme (DME ID: DME0005)
DME Name Cytochrome P450 2A6 (CYP2A6), Homo sapiens DME Info
UniProt ID
CP2A6_HUMAN
EC Number    EC: 1.14.14.1     (Click to Show/Hide the Complete EC Tree)
Oxidoreductase
Oxygen paired donor oxidoreductase
Flavin/flavoprotein donor oxidoreductase
EC: 1.14.14.1
Lineage    Species: Homo sapiens     (Click to Show/Hide the Complete Species Lineage)
Kingdom: Metazoa
Phylum: Chordata
Class: Mammalia
Order: Primates
Family: Hominidae
Genus: Homo
Species: Homo sapiens
Interactome
Disease Specific Interactions between Host Protein and DME (HOSPPI)
      ICD Disease Classification Healthy
               ICD-11: Healthy Click to Show/Hide the Full List of HOSPPI:        3 HOSPPI
                     Oligomerization
                            Cytochrome b5 (CYB5A) Health Heterooligomer
Uniprot ID
CYB5_HUMAN
Interaction Name CYB5A, POR and CYP2A6 heterooligomerization [1]
Studied Cell Lines Whole-BTC cell line
Activity Km = 1.45 microM
Description Cytochrome b5 (CYB5A) and NADPH-CYP450 reductase (POR) are reported to heterooligomerize with the CYP2A6 gene, which is necessary for sustaining the enzyme activity of Cytochrome P450 2A6. As a result, the interaction among CYB5A, POR and CYP2A6 is necessary for sustaining the drug-metabolizing process of Cytochrome P450 2A6.
                            NADPH-CYP450 reductase (POR) Health Heterooligomer
Uniprot ID
NCPR_HUMAN
Interaction Name POR, CYB5A and CYP2A6 heterooligomerization [1]
Studied Cell Lines Whole-BTC cell line
Activity Km = 1.45 microM
Description NADPH-CYP450 reductase (POR) and Cytochrome b5 (CYB5A) are reported to heterooligomerize with the CYP2A6 gene, which is necessary for sustaining the enzyme activity of Cytochrome P450 2A6. As a result, the interaction among POR, CYB5A and CYP2A6 is necessary for sustaining the drug-metabolizing process of Cytochrome P450 2A6.
                            NADPH-CYP450 reductase (POR) Health Heterooligomer
Uniprot ID
NCPR_HUMAN
Interaction Name POR, CYP2E1 and CYP2A6 heterooligomerization [2]
Studied Cell Lines Baculovirus expression system
Affected Substrate(s): Coumarin
N-nitrosodimethylamine
Description NADPH-CYP450 reductase (POR) and Cytochrome P450 2E1 (CYP2E1) are reported to heterooligomerize with the CYP2A6 protein, which leads to a decreased activity of the drug-metabolizing enzyme Cytochrome P450 2A6. As a result, the interaction among POR, CYP2E1 and CYP2A6 can decrease the drug-metabolizing process of Cytochrome P450 2A6.
      ICD Disease Classification 02 Neoplasms
               ICD-11: 2C12 Liver cancer Click to Show/Hide the Full List of HOSPPI:        1 HOSPPI
                     Transcription-factor regulation
                            Nuclear TF factor Y alpha (NFYA) Liver cancer Activation
Uniprot ID
NFYA_HUMAN
Interaction Name NFYA-CYP2A6 interaction [3]
Studied Cell Lines HepG2 cell line
Ensembl ID
ENSG00000001167
Description Nuclear TF factor Y alpha (NFYA) is reported to activate the transcription of CYP2A6 gene, which leads to an increased expression of the drug-metabolizing enzyme Cytochrome P450 2A6. As a result, the interaction between NFYA and CYP2A6 can activate the drug-metabolizing process of Cytochrome P450 2A6.
References
1 Human cytochrome P450 expression in bacteria: whole-cell high-throughput activity assay for CYP1A2, 2A6 and 3A4. Biochem Pharmacol. 2018 Dec;158:134-140.
2 Competitive interactions between cytochromes P450 2A6 and 2E1 for NADPH-cytochrome P450 oxidoreductase in the microsomal membranes produced by a baculovirus expression system. Arch Biochem Biophys. 1997 Jun 1;342(1):82-91.
3 Polymorphic NF-Y dependent regulation of human nicotine C-oxidase (CYP2A6). Pharmacogenetics. 2004 Jun;14(6):369-79.

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