ISDA

Deposition Date 2005-03-02

Release Date 2005-08-16

Last Version Date 2023-08-23

Entry Detail

PDB ID:

1Z10

Keywords:

OXIDOREDUCTASE

Title:

Crystal Structure of Human Microsomal P450 2A6 with Coumarin Bound

Biological Source:

Source Organism:

Homo sapiens (Taxon ID: 9606)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.90 Å

R-Value Free:

0.23

R-Value Work:

0.19

R-Value Observed:

0.19

Space Group:

P 1 21 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:cytochrome P450, family 2, subfamily A, polypeptide 6
Gene (Uniprot):CYP2A6
Chain IDs:A, B, C, D
Chain Length:476
Number of Molecules:4
Biological Source:Homo sapiens

UniProt ID:P11509 Pfam ID:PF00067 EC:1.14.14.1

Primary Citation

Structures of human microsomal cytochrome P450 2A6 complexed with coumarin and methoxsalen

Yano, J.K, Hsu, M.H, Griffin, K.J, Stout, C.D, Johnson, E.F.Show

Nat.Struct.Mol.Biol. 12 822 823 (2005)

PMID: 16086027 DOI: 10.1038/nsmb971

Abstact

Human microsomal cytochrome P450 2A6 (CYP2A6) contributes extensively to nicotine detoxication but also activates tobacco-specific procarcinogens to mutagenic products. The CYP2A6 structure shows a compact, hydrophobic active site with one hydrogen bond donor, Asn297, that orients coumarin for regioselective oxidation. The inhibitor methoxsalen effectively fills the active site cavity without substantially perturbing the structure. The structure should aid the design of inhibitors to reduce smoking and tobacco-related cancers.

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