Entry
Name
phytoene desaturase (3,4-didehydrolycopene-forming);
5-step phytoene desaturase;
five-step phytoene desaturase;
phytoene desaturase (ambiguous);
Al-1
Class
Oxidoreductases;
Acting on the CH-CH group of donors;
With unknown physiological acceptors
BRITE hierarchy
Sysname
15-cis-phytoene:acceptor oxidoreductase (3,4-didehydrolycopene-forming)
Reaction(IUBMB)
15-cis-phytoene + 5 acceptor = all-trans-3,4-didehydrolycopene + 5 reduced acceptor (overall reaction) [RN:
R09703 ];
(1a) 15-cis-phytoene + acceptor = all-trans-phytofluene + reduced acceptor [RN:
R09692 ];
(1b) all-trans-phytofluene + acceptor = all-trans-zeta-carotene + reduced acceptor [RN:
R04787 ];
(1c) all-trans-zeta-carotene + acceptor = all-trans-neurosporene + reduced acceptor [RN:
R04798 ];
(1d) all-trans-neurosporene + acceptor = all-trans-lycopene + reduced acceptor [RN:
R04800 ];
(1e) all-trans-lycopene + acceptor = all-trans-3,4-didehydrolycopene + reduced acceptor [RN:
R07518 ]
Reaction(KEGG)
Substrate
15-cis-phytoene [CPD:
C05421 ];
acceptor [CPD:
C00028 ];
all-trans-phytofluene [CPD:
C05414 ];
all-trans-zeta-carotene [CPD:
C05430 ];
all-trans-neurosporene [CPD:
C05431 ];
all-trans-lycopene [CPD:
C05432 ]
Product
all-trans-3,4-didehydrolycopene [CPD:
C15867 ];
reduced acceptor [CPD:
C00030 ];
all-trans-phytofluene [CPD:
C05414 ];
all-trans-zeta-carotene [CPD:
C05430 ];
all-trans-neurosporene [CPD:
C05431 ];
all-trans-lycopene [CPD:
C05432 ]
Comment
This enzyme is involved in carotenoid biosynthesis and catalyses up to five desaturation steps (cf. EC
1.3.99.28 [phytoene desaturase (neurosporene-forming)], EC
1.3.99.29 [phytoene desaturase (zeta-carotene-forming)] and EC
1.3.99.31 [phytoene desaturase (lycopene-forming)]).
History
EC 1.3.99.30 created 2011
Pathway
ec01110 Biosynthesis of secondary metabolites
Orthology
K15745 phytoene desaturase (3,4-didehydrolycopene-forming)
Genes
AGIF : 122854590 122854592 122854593
API : 100159050 100161380 100169110 100169245(tor)
ACOO : 126834667 126834668
TUT : 107364307 107364309 107365911
NTE : NEUTE1DRAFT92886(NEUTE1DRAFT_92886)
SMP : 10810047(SMAC4_01244)
CDET : 87944659(CDEST_08156)
BFU : BCIN_01g04550(Bcphd1)
ALUC : AKAW2_12022A AKAW2_61045S AKAW2_61046A
POU : POX_a01893 POX_a01895
PTRR : 6345636(PtrM4_040010)
KMG : 30160148(I203_104720)
KNE : 92180956(IAR55_003698)
FCY : FRACYDRAFT_195646(PDH1) FRACYDRAFT_231974
» show all
Taxonomy
Reference
Authors
Hausmann A, Sandmann G
Title
A single five-step desaturase is involved in the carotenoid biosynthesis pathway to beta-carotene and torulene in Neurospora crassa.
Journal
Sequence
Reference
Authors
Estrada AF, Maier D, Scherzinger D, Avalos J, Al-Babili S
Title
Novel apocarotenoid intermediates in Neurospora crassa mutants imply a new biosynthetic reaction sequence leading to neurosporaxanthin formation.
Journal
Sequence
Other DBs
ExPASy - ENZYME nomenclature database: 1.3.99.30
LinkDB
All DBs