| Entry |
|
| Name |
Delta7-sterol 5(6)-desaturase;
lathosterol oxidase;
Delta7-sterol Delta5-dehydrogenase;
Delta7-sterol 5-desaturase;
Delta7-sterol-C5(6)-desaturase;
5-DES;
SC5DL (gene name);
ERG3 (gene name)
|
| Class |
Oxidoreductases;
Acting on paired donors, with incorporation or reduction of molecular oxygen;
With oxidation of a pair of donors resulting in the reduction of O2 to two molecules of water
 |
| Sysname |
Delta7-sterol,ferrocytochrome b5:oxygen oxidoreductase 5,6-dehydrogenating
|
| Reaction(IUBMB) |
a Delta7-sterol + 2 ferrocytochrome b5 + O2 + 2 H+ = a Delta5,7-sterol + 2 ferricytochrome b5 + 2 H2O
|
| Reaction(KEGG) |
|
| Substrate |
|
| Product |
Delta5,7-sterol;
ferricytochrome b5 [CPD: C00996];
H2O [CPD: C00001]
|
| Comment |
This enzyme, found in eukaryotic organisms, catalyses the introduction of a double bond between the C5 and C6 carbons of the B ring of Delta7-sterols, to yield the corresponding Delta5,7-sterols. The enzymes from yeast, plants and vertebrates act on avenasterol, episterol, and lathosterol, respectively. The enzyme is located at the endoplasmic reticulum and is membrane bound.
|
| History |
EC 1.14.19.20 created 1972 as EC 1.3.3.2, transferred 2005 to EC 1.14.21.6, transferred 2015 to EC 1.14.19.20
|
| Pathway |
| Steroid biosynthesis | | Metabolic pathways | | Biosynthesis of secondary metabolites | | Biosynthesis of antibiotics |
|
| Orthology |
| Delta7-sterol 5-desaturase |
|
| Genes |
HSA: | | PTR: | | PPS: | | GGO: | | PON: | | NLE: | | MCC: | | MCF: | | CSAB: | | RRO: | | CJC: | | SBQ: | | MMU: | | RNO: | | CGE: | | NGI: | | HGL: | | CCAN: | | OCU: | | TUP: | | CFA: | | AML: | | UMR: | | FCA: | | PTG: | | AJU: | | BTA: | | BOM: | | BIU: | | PHD: | | CHX: | | OAS: | | SSC: | | CFR: | | BACU: | | LVE: | | ECB: | | MYB: | | MYD: | | HAI: | | RSS: | | PALE: | | LAV: | | MDO: | | SHR: | | OAA: | | GGA: | | MGP: | | CJO: | | APLA: | | ACYG: | | TGU: | | GFR: | | FAB: | | PHI: | | CCW: | | FPG: | | FCH: | | CLV: | | AAM: | | ASN: | | AMJ: | | PSS: | | CMY: | | CPIC: | | ACS: | | PBI: | | GJA: | | XLA: | | XTR: | | NPR: | | DRE: | | SRX: | | SANH: | | SGH: | | IPU: | | TRU: | | TNG: | | LCO: | | NCC: | | MZE: | | OLA: | | XMA: | | CSEM: | | LCF: | | SASA: | | ELS: | | SFM: | | LCM: | | CMK: | | BFO: | | SPU: | | SKO: | | TCA: | | NVL: | | BMOR: | | DPX: | | HRO: | | LGI: | | CRG: | | NVE: | | TAD: | | AQU: | | ATH: | | ALY: | | CRB: | | EUS: | | BRP: | | BNA: | | THJ: | | CIT: | | CIC: | | TCC: | | GRA: | | GHI: | | EGR: | | GMX: | | PVU: | | VRA: | | VAR: | | CCAJ: | | MTR: | | CAM: | | ADU: | | AIP: | | LJA: | | LANG: | | FVE: | | PPER: | | PMUM: | | MDM: | | PXB: | | CSV: | | CMO: | | RCU: | | JCU: | | POP: | | VVI: | | SLY: | | SPEN: | | SOT: | | INI: | | SIND: | | BVG: | | NNU: | | OSA: | | DOSA: | | OBR: | | BDI: | | ATS: | | SBI: | | ZMA: | | SITA: | | PDA: | | EGU: | | MUS: | | ATR: | | SMO: | | PPP: | | CRE: | | VCN: | | OLU: | | OTA: | | BPG: | | MIS: | | MPP: | | CSL: | | CVR: | | APRO: | | CME: | | GSL: | | CCP: | | SCE: | | AGO: | | ERC: | | KLA: | | LTH: | | VPO: | | ZRO: | | CGR: | | NDI: | | TPF: | | TBL: | | TDL: | | KAF: | | PPA: | | DHA: | | PIC: | | SPAA: | | LEL: | | CAL: | | CTP: | | COT: | | CDU: | | CTEN: | | YLI: | | CLU: | | CAUR: | | NCR: | | NTE: | | SMP: | | PAN: | | TTT: | | MTM: | | CTHR: | | MGR: | | TMN: | | FGR: | | FPU: | | FVR: | | FOX: | | NHE: | | TRE: | | MAW: | | MAJ: | | CMT: | | VAL: | | VDA: | | CFJ: | | ELA: | | PFY: | | SSL: | | BFU: | | MBE: | | PSCO: | | GLZ: | | ANI: | | AFM: | | AOR: | | ANG: | | AFV: | | ACT: | | NFI: | | PCS: | | PDP: | | CIM: | | CPW: | | PBL: | | PBN: | | URE: | | ABE: | | TVE: | | AJE: | | PNO: | | PTE: | | BZE: | | BSC: | | BOR: | | ZTR: | | PFJ: | | BCOM: | | NPA: | | TML: | | SPO: | | CNE: | | CNB: | | CGI: | | TMS: | | TVS: | | DSQ: | | PCO: | | SHS: | | HIR: | | PSQ: | | ADL: | | FME: | | GTR: | | LBC: | | MRR: | | CCI: | | SCM: | | ABP: | | ABV: | | CPUT: | | SLA: | | WSE: | | WIC: | | UMA: | | PFP: | | MGL: | | MLR: | | MBR: | | SRE: | | DFA: | | ACAN: | | TET: | | PTM: | | SMIN: | | PTI: | | FCY: | | PIF: | | PSOJ: | | SPAR: | | EHX: | | TBR: | | TCR: | | LMA: | | LIF: | | LDO: | | LMI: | | LBZ: | | NGR: | | HCH: | | SAMY: | | MRM: | | » show all
 |
| Reference |
|
| Authors |
DEMPSEY ME, SEATON JD, SCHROEPFER GJ Jr, TROCKMAN RW. |
| Title |
THE INTERMEDIARY ROLE OF DELTA-5,7-CHOLESTADIEN-3-BETA-OL IN CHOLESTEROL BIOSYNTHESIS. |
| Journal |
J. Biol. Chem. 239 (1964) 1381-7. |
| Reference |
|
| Authors |
Honjo K, Ishibashi T, Imai Y |
| Title |
Partial purification and characterization of lathosterol 5-desaturase from rat liver microsomes. |
| Journal |
J. Biochem. 97 (1985) 955-9. |
| Reference |
|
| Authors |
Arthington BA, Bennett LG, Skatrud PL, Guynn CJ, Barbuch RJ, Ulbright CE, Bard M |
| Title |
Cloning, disruption and sequence of the gene encoding yeast C-5 sterol desaturase. |
| Journal |
Gene. 102 (1991) 39-44. |
| Sequence |
|
| Reference |
|
| Authors |
Taton M, Rahier A. |
| Title |
Plant sterol biosynthesis: identification and characterization of higher plant delta 7-sterol C5(6)-desaturase. |
| Journal |
Arch. Biochem. Biophys. 325 (1996) 279-88. |
| Reference |
|
| Authors |
Nishino H, Nakaya J, Nishi S, Kurosawa T, Ishibashi T. |
| Title |
Temperature-induced differential kinetic properties between an initial burst and the following steady state in membrane-bound enzymes: studies on lathosterol 5-desaturase. |
| Journal |
Arch. Biochem. Biophys. 339 (1997) 298-304. |
| Reference |
|
| Authors |
Taton M, Husselstein T, Benveniste P, Rahier A. |
| Title |
Role of highly conserved residues in the reaction catalyzed by recombinant Delta7-sterol-C5(6)-desaturase studied by site-directed mutagenesis. |
| Journal |
Biochemistry. 39 (2000) 701-11. |
| Sequence |
|
| Reference |
|
| Authors |
Poklepovich TJ, Rinaldi MA, Tomazic ML, Favale NO, Turkewitz AP, Nudel CB, Nusblat AD |
| Title |
The cytochrome b5 dependent C-5(6) sterol desaturase DES5A from the endoplasmic reticulum of Tetrahymena thermophila complements ergosterol biosynthesis mutants in Saccharomyces cerevisiae. |
| Journal |
Steroids. 77 (2012) 1313-20. |
| Other DBs |
ExplorEnz - The Enzyme Database: IUBMB Enzyme Nomenclature: ExPASy - ENZYME nomenclature database: BRENDA, the Enzyme Database: CAS: 37255-37-1 |
| LinkDB |
 |