Aliases for CYP4F3 Gene
- Cytochrome P450, Family 4, Subfamily F, Polypeptide 3 2 3
- LTB4H 3 4 6
- Cytochrome P450, Subfamily IVF, Polypeptide 3 (Leukotriene B4 Omega Hydroxylase) 2 3
- 20-Hydroxyeicosatetraenoic Acid Synthase 3 4
- Leukotriene-B(4) Omega-Hydroxylase 2 3 4
- Leukotriene-B(4) 20-Monooxygenase 2 3 4
- Cytochrome P450-LTB-Omega 3 4
- Cytochrome P450 4F3 3 4
- 20-HETE Synthase 3 4
- CYPIVF3 3 4
External Ids for CYP4F3 Gene
Previous Symbols for CYP4F3 Gene
This gene, CYP4F3, 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 protein localizes to the endoplasmic reticulum. The enzyme starts the process of inactivating and degrading leukotriene B4, a potent mediator of inflammation. This gene is part of a cluster of cytochrome P450 genes on chromosome 19. Another member of this family, CYP4F8, is approximately 18 kb away. Three transcript variants encoding two different isoforms have been found for this gene. [provided by RefSeq, Nov 2010]
GeneCards Summary for CYP4F3 Gene
CYP4F3 (Cytochrome P450, Family 4, Subfamily F, Polypeptide 3) is a Protein Coding gene. Diseases associated with CYP4F3 include ascariasis and trichuriasis. Among its related pathways are Metabolism and Metabolism. GO annotations related to this gene include electron carrier activity and heme binding. An important paralog of this gene is CYP4F12.
UniProtKB/Swiss-Prot for CYP4F3 Gene
Isoform CYP4F3A: Catalyzes the omega-hydroxylation of leukotriene-B(4), a potent chemoattractant for polymorphonuclear leukocytes, it has low activity for arachidonic acid.
Isoform CYP4F3B: Shows arachidonic acid omega-hydroxylase activity by mediating conversion of arachidonic acid to 20-hydroxyeicosatetraenoic acid (20-HETE) (PubMed:11461919, PubMed:16820285). Has a 30-fold higher Km for leukotriene-B(4) compared with CYP4F3A (PubMed:11461919). Also converts eicosapentaenoate (EPA) to 20-hydroxyeicosapentaenoate (20-OH-EPA) (PubMed:16820285). Acts as a polyunsaturated omega-3 fatty acids hydroxylase: mediates conversion of docosahexaenoate (DHA) to 22-hydroxydocosahexaenoate (PubMed:16820285).
Cytochrome P450 (CYP450) enzymes are a diverse group of catalysts that contains 57 members in humans. CYPs are usually membrane-bound and are localized to the inner mitochondrial or endoplasmic reticular membrane. CYPs have oxygenase activity and commonly catalyze redox reactions, involving the oxidation of the substrate and reduction of water. This group of enzymes contain a heme ion within the active site, which is essential for catalytic activity. CYPs have been found in all organisms tested and are ubiquitously expressed. They are found at high levels in the liver, where they have an important role in metabolism of drugs and endogenous toxic compounds (for example bilirubin). Most CYPs can metabolize numerous substrates and this accounts for their major role in drug interactions. CYPs also have functions in steroid hormone synthesis, cholesterol synthesis and vitamin D metabolism.