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Proteins/UNIPROT:P13584
Catalyzes the omega- and (omega-1)-hydroxylation of saturated fatty acids and n-alkanes (By similarity). Also bioactivates xenobiotics such as the procarcinogen 3-methoxy-4-aminoazobenzene and the cyclic arylamines 2-aminofluorene and 2-aminoanthracene (By similarity). In addition, catalyzes O-dealkylation of 7-ethoxycoumarin (By similarity). Functions at the interface of xenobiotic and endobiotic metabolism, contributing both to fatty acid and hydrocarbon oxidation and to the bioactivation of diverse xenobiotics. Preferentially hydroxylates the terminal carbon (omega-hydroxylation) of medium-chain fatty acids (C8-C10), with regioselectivity decreasing as chain length increases. C8 fatty acids and C7 n-alkanes display optimal chain length for regioselective omega-hydroxylation, and n-alkanes (C7-C10) are generally turned over faster and with higher regioselectivity than the corresponding fatty acids. In addition to omega/omega-1 hydroxylation, also catalyzes alpha-, beta-, gamma- and delta-hydroxylation of mid-chain length fatty acids, whereas fatty alcohols of the same chain length are almost exclusively hydroxylated at the omega, omega-1 and omega-2 positions (By similarity)..
Function from UniProtKB (P13584), read 2026-09-23. CC BY 4.0.
Curated compounds routed: 1 · metabolized by
1 compound
1 compound.
0 reported routes1 assembled route
71 statements
71 statements · 6 reference databases · Subject: CYP4B1 · Sources: Bgee, Human-GEM, Reactome, Rhea, UniProt, WikiPathways
58 reactions
3 names
Resolves to: CYP4B1
Reaction pageLeft to rightBalancedEC 1.14.14.1cytosol
Human-GEM MAR00931CC BY 4.0Reference data
(5Z,8Z,11Z,14Z)-eicosatetraenoate+proton+NADPH(4-)+dioxygenMAM01213c+water+NADP(3-)
Catalysed by CYP3A43 or CYP2D6 or CYP3A5 or CYP2C18 or CYP2E1 or CYP2J2 or CYP1B1 or CYP2C9 or CYP2C8 or CYP1A1 or CYP1A2 or CYP4B1 and 13 more alternatives
Reaction pageLeft to rightBalancedEC 1.14.14.1cytosol
Human-GEM MAR00932CC BY 4.0Reference data
(5Z,8Z,11Z,14Z)-eicosatetraenoate+proton+NADPH(4-)+dioxygenMAM01239c+water+NADP(3-)
Catalysed by CYP3A43 or CYP2D6 or CYP3A5 or CYP2C18 or CYP2E1 or CYP2J2 or CYP1B1 or CYP2C9 or CYP2C8 or CYP1A1 or CYP1A2 or CYP4B1 and 14 more alternatives
Reaction pageLeft to rightBalancedEC 1.14.14.1cytosol
Human-GEM MAR00933CC BY 4.0Reference data
(5Z,8Z,11Z,14Z)-eicosatetraenoate+proton+NADPH(4-)+dioxygen20-hydroxy-(5Z,8Z,11Z,14Z)-eicosatetraenoate+water+NADP(3-)
Catalysed by CYP3A43 or CYP2D6 or CYP3A5 or CYP2C18 or CYP2E1 or CYP2J2 or CYP1B1 or CYP2C9 or CYP2C8 or CYP1A1 or CYP1A2 or CYP4B1 and 15 more alternatives
Reaction pageLeft to rightBalancedEC 1.14.14.1, 1.14.15.3cytosol
Human-GEM MAR00934CC BY 4.0Reference data
(5Z,8Z,11Z,14Z)-eicosatetraenoate+proton+NADPH(4-)+dioxygenMAM00297c+water+NADP(3-)
Catalysed by CYP3A43 or CYP2D6 or CYP3A5 or CYP2C18 or CYP2E1 or CYP2J2 or CYP1B1 or CYP2C9 or CYP2C8 or CYP1A1 or CYP1A2 or CYP4B1 and 14 more alternatives
Reaction pageLeft to rightBalancedEC 1.14.14.1cytosol
Human-GEM MAR00935CC BY 4.0Reference data
(5Z,8Z,11Z,14Z)-eicosatetraenoate+proton+NADPH(4-)+dioxygen13-hydroxy-(5Z,8Z,11Z,14Z)-eicosatetraenoate+water+NADP(3-)
Catalysed by CYP3A43 or CYP2D6 or CYP3A5 or CYP2C18 or CYP2E1 or CYP2J2 or CYP1B1 or CYP2C9 or CYP2C8 or CYP1A1 or CYP1A2 or CYP4B1 and 14 more alternatives
Reaction pageLeft to rightBalancedEC 1.14.14.1cytosol
Human-GEM MAR00936CC BY 4.0Reference data
(5Z,8Z,11Z,14Z)-eicosatetraenoate+proton+NADPH(4-)+dioxygen16(R)-hydroxy-(5Z,8Z,11Z,14Z)-eicosatetraenoate+water+NADP(3-)
Catalysed by CYP3A43 or CYP2D6 or CYP3A5 or CYP2C18 or CYP2E1 or CYP2J2 or CYP1B1 or CYP2C9 or CYP2C8 or CYP1A1 or CYP1A2 or CYP4B1 and 14 more alternatives
Reaction pageLeft to rightBalancedEC 1.14.14.1cytosol
Human-GEM MAR00937CC BY 4.0Reference data
(5Z,8Z,11Z,14Z)-eicosatetraenoate+proton+NADPH(4-)+dioxygen17-hydroxy-(5Z,8Z,11Z,14Z)-eicosatetraenoate+water+NADP(3-)
Catalysed by CYP3A43 or CYP2D6 or CYP3A5 or CYP2C18 or CYP2E1 or CYP2J2 or CYP1B1 or CYP2C9 or CYP2C8 or CYP1A1 or CYP1A2 or CYP4B1 and 14 more alternatives
Reaction pageLeft to rightBalancedEC 1.14.14.1cytosol
Human-GEM MAR00938CC BY 4.0Reference data
(5Z,8Z,11Z,14Z)-eicosatetraenoate+proton+NADPH(4-)+dioxygenMAM00426c+water+NADP(3-)
Catalysed by CYP3A43 or CYP2D6 or CYP3A5 or CYP2C18 or CYP2E1 or CYP2J2 or CYP1B1 or CYP2C9 or CYP2C8 or CYP1A1 or CYP1A2 or CYP4B1 and 14 more alternatives
Reaction pageLeft to rightBalancedEC 1.14.14.1cytosol
Human-GEM MAR00939CC BY 4.0Reference data
(5Z,8Z,11Z,14Z)-eicosatetraenoate+proton+NADPH(4-)+dioxygenMAM00430c+water+NADP(3-)
Catalysed by CYP3A43 or CYP2D6 or CYP3A5 or CYP2C18 or CYP2E1 or CYP2J2 or CYP1B1 or CYP2C9 or CYP2C8 or CYP1A1 or CYP1A2 or CYP4B1 and 14 more alternatives
Reaction pageLeft to rightBalancedEC 1.14.14.1cytosol
Human-GEM MAR00940CC BY 4.0Reference data
(5Z,8Z,11Z,14Z)-eicosatetraenoate+proton+NADPH(4-)+dioxygen5,6-epoxy-(8Z,11Z,14Z)-eicosatrienoate+water+NADP(3-)
Catalysed by CYP3A43 or CYP2D6 or CYP3A5 or CYP2C18 or CYP2E1 or CYP2J2 or CYP1B1 or CYP2C9 or CYP2C8 or CYP1A1 or CYP1A2 or CYP4B1 and 14 more alternatives
Reaction pageLeft to rightBalancedEC 1.14.14.1cytosol
Human-GEM MAR00942CC BY 4.0Reference data
(5Z,8Z,11Z,14Z)-eicosatetraenoate+FADH2+dioxygen5,6-epoxy-(8Z,11Z,14Z)-eicosatrienoate+FAD+water
Catalysed by CYP3A43 or CYP2D6 or CYP3A5 or CYP2C18 or CYP2E1 or CYP2J2 or CYP1B1 or CYP2C9 or CYP2C8 or CYP1A1 or CYP1A2 or CYP4B1 and 14 more alternatives
Reaction pageLeft to rightBalancedEC 1.14.14.1cytosol
Human-GEM MAR00943CC BY 4.0Reference data