Biology:Phytoene desaturase (3,4-didehydrolycopene-forming)
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| Phytoene desaturase (3,4-didehydrolycopene-forming) | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| EC number | 1.3.99.30 | ||||||||
| Databases | |||||||||
| IntEnz | IntEnz view | ||||||||
| BRENDA | BRENDA entry | ||||||||
| ExPASy | NiceZyme view | ||||||||
| KEGG | KEGG entry | ||||||||
| MetaCyc | metabolic pathway | ||||||||
| PRIAM | profile | ||||||||
| PDB structures | RCSB PDB PDBe PDBsum | ||||||||
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Phytoene desaturase (3,4-didehydrolycopene-forming) (EC 1.3.99.30, 5-step phytoene desaturase, five-step phytoene desaturase, phytoene desaturase (ambiguous), Al-1) is an enzyme with systematic name 15-cis-phytoene:acceptor oxidoreductase (3,4-didehydrolycopene-forming).[1][2] This enzyme catalyses the following chemical reaction
- 15-cis-phytoene + 5 acceptor [math]\displaystyle{ \rightleftharpoons }[/math] all-trans-3,4-didehydrolycopene + 5 reduced acceptor (overall reaction)
- (1a) 15-cis-phytoene + acceptor [math]\displaystyle{ \rightleftharpoons }[/math] all-trans-phytofluene + reduced acceptor
- (1b) all-trans-phytofluene + acceptor [math]\displaystyle{ \rightleftharpoons }[/math] all-trans-zeta-carotene + reduced acceptor
- (1c) all-trans-zeta-carotene + acceptor [math]\displaystyle{ \rightleftharpoons }[/math] all-trans-neurosporene + reduced acceptor
- (1d) all-trans-neurosporene + acceptor [math]\displaystyle{ \rightleftharpoons }[/math] all-trans-lycopene + reduced acceptor
- (1e) all-trans-lycopene + acceptor [math]\displaystyle{ \rightleftharpoons }[/math] all-trans-3,4-didehydrolycopene + reduced acceptor
This enzyme is involved in carotenoid biosynthesis.
See also
- Phytoene desaturase (lycopene-forming)
- Phytoene desaturase (neurosporene-forming)
- Phytoene desaturase (zeta-carotene-forming)
- 15-Cis-phytoene desaturase
References
- ↑ "A single five-step desaturase is involved in the carotenoid biosynthesis pathway to beta-carotene and torulene in Neurospora crassa". Fungal Genetics and Biology 30 (2): 147–53. July 2000. doi:10.1006/fgbi.2000.1212. PMID 11017770.
- ↑ "Novel apocarotenoid intermediates in Neurospora crassa mutants imply a new biosynthetic reaction sequence leading to neurosporaxanthin formation". Fungal Genetics and Biology 45 (11): 1497–505. November 2008. doi:10.1016/j.fgb.2008.09.001. PMID 18812228.
External links
- Phytoene+desaturase+(3,4-didehydrolycopene-forming) at the US National Library of Medicine Medical Subject Headings (MeSH)
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