LMPD Database

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LMP000541

UniProt Annotations

Entry Information
Gene Namecytochrome P450, family 8, subfamily B, polypeptide 1
Protein EntryCP8B1_HUMAN
UniProt IDQ9UNU6
SpeciesHuman
Comments
Comment typeDescription
Catalytic Activity7-alpha-hydroxycholest-4-en-3-one + NADPH + O(2) = 7-alpha,12-alpha-dihydroxycholest-4-en-3-one + NADP(+) + H(2)O.
CofactorName=heme; Xref=ChEBI
FunctionInvolved in bile acid synthesis and is responsible for the conversion of 7 alpha-hydroxy-4-cholesten-3-one into 7 alpha, 12 alpha-dihydroxy-4-cholesten-3-one. Responsible for the balance between formation of cholic acid and chenodeoxycholic acid. Has a rather broad substrate specificity including a number of 7-alpha- hydroxylated C27 steroids.
SimilarityBelongs to the cytochrome P450 family.
Subcellular LocationEndoplasmic reticulum membrane; Single-pass membrane protein. Microsome membrane; Single-pass membrane protein.
Tissue SpecificityLiver.