KEGG   ENZYME: 1.10.9.1Help
Entry
EC 1.10.9.1                 Enzyme                                 

Name
plastoquinol---plastocyanin reductase;
plastoquinol/plastocyanin oxidoreductase;
cytochrome f/b6 complex;
cytochrome b6f complex
Class
Oxidoreductases;
Acting on diphenols and related substances as donors;
With a copper protein as acceptor
BRITE hierarchy
Sysname
plastoquinol:oxidized-plastocyanin oxidoreductase
Reaction(IUBMB)
plastoquinol + 2 oxidized plastocyanin + 2 H+[side 1] = plastoquinone + 2 reduced plastocyanin + 2 H+[side 2] [RN:R03817]
Reaction(KEGG)
R03817;
(other) R08409
Show
Substrate
plastoquinol [CPD:C16693];
oxidized plastocyanin [CPD:C03162];
H+[side 1]
Product
plastoquinone [CPD:C02061];
reduced plastocyanin [CPD:C03025];
H+[side 2]
Comment
Contains two b-type cytochromes, two c-type cytochromes (cn and f), and a [2Fe-2S] Rieske cluster. Cytochrome c-552 can act as acceptor instead of plastocyanin, but more slowly. In chloroplasts, protons are translocated through the thylakoid membrane from the lumen to the stroma.
History
EC 1.10.9.1 created 1984 as EC 1.10.99.1, transferred 2011 to EC 1.10.9.1
Pathway
Photosynthesis
Orthology
K02636  
cytochrome b6-f complex iron-sulfur subunit
Genes
ATH: 
AT4G03280(PETC)
ALY: 
CRB: 
EUS: 
CIT: 
CIC: 
TCC: 
GMX: 
MTR: 
CAM: 
FVE: 
CSV: 
RCU: 
POP: 
POPTR_0013s14520g(POPTRDRAFT_663556) POPTR_0019s14100g(POPTRDRAFT_826333)
VVI: 
SLY: 
SOT: 
OSA: 
DOSA: 
Os07t0556200-01(Os07g0556200)
OBR: 
BDI: 
SBI: 
SORBI_09g020820(SORBIDRAFT_09g020820)
ZMA: 
SITA: 
ATR: 
s00072p00084990(AMTR_s00072p00084990)
SMO: 
PPP: 
CRE: 
VCN: 
OLU: 
MIS: 
MPP: 
CSL: 
CVR: 
CME: 
GSL: 
CCP: 
PTI: 
TPS: 
EHX: 
GTT: 
GEB: 
DDN: 
BMX: 
DOL: 
SCL: 
DTI: 
BSUB: 
BACI: 
STH: 
DSY: 
DHD: 
DDH: 
DDL: 
DOR: 
DAI: 
HMO: 
HM1_0699(petC)
AYM: 
WCH: 
SUS: 
PSL: 
SYN: 
sll1182(petC) sll1316(petC) slr1185(petC)
SYZ: 
MYO_110630(petC) MYO_117060(petC) MYO_131630(petC)
SYY: 
SYT: 
SYS: 
SYQ: 
SYW: 
SYNW1841(petC)
SYC: 
syc0318_d(petC)
SYF: 
SYD: 
SYE: 
SYG: 
sync_2149(petC)
SYR: 
SYX: 
SYP: 
CYA: 
CYA_1403(petC)
CYB: 
CYB_1622(petC)
SYNE: 
SYNP: 
TEL: 
tlr0959(petC)
THN: 
MAR: 
MAE_19220(petC1) MAE_29060(petC2)
CYT: 
cce_2958(petC1) cce_3410(petC2)
CYP: 
CYC: 
CYN: 
CYH: 
CYJ: 
AMR: 
CGC: 
CAN: 
CSN: 
DSL: 
HAO: 
GLP: 
CMP: 
CYU: 
TER: 
LEP: 
GEI: 
OAC: 
ONI: 
PSEU: 
CEP: 
MIC: 
ARP: 
GVI: 
gvip416(petC)
GLJ: 
ANA: 
all0606(petC) all1512(petC) all2453(petC) all4511(petC)
NPU: 
NOS: 
NOP: 
AVA: 
ANB: 
ANA_C10614(petC1) ANA_C13772(petC2)
ACY: 
NAZ: 
CSG: 
CALO: 
CALT: 
RIV: 
PMA: 
Pro_0460(petC)
PMM: 
PMM0462(petC)
PMT: 
PMT1322(petC)
PMN: 
PMI: 
PMB: 
PMC: 
PMF: 
PMG: 
PMH: 
PMJ: 
PME: 
CTHE: 
PLP: 
SCS: 
SLI: 
FAE: 
ZPR: 
CTE: 
CT0302(petC)
CPC: 
CCH: 
CPH: 
CPB: 
CLI: 
PVI: 
PLT: 
PPH: 
PAA: 
CTS: 
MRO: 
HAU: 
CAP: 
TYE: 
LFC: 
LFI: 
MOX: 
TUZ: 
 » show all
Taxonomy
Reference
1  [PMID:6269845]
  Authors
Hurt E, Hauska G.
  Title
A cytochrome f/b6 complex of five polypeptides with plastoquinol-plastocyanin-oxidoreductase activity from spinach chloroplasts.
  Journal
Eur. J. Biochem. 117 (1981) 591-5.
  Organism
Spinacia oleracea
Reference
2  [PMID:16787635]
  Authors
Cramer WA, Zhang H
  Title
Consequences of the structure of the cytochrome b6f complex for its charge transfer pathways.
  Journal
Biochim. Biophys. Acta. 1757 (2006) 339-45.
  Organism
Chlamydomonas reinhardtii, Mastigocladus laminosus
Other DBs
ExplorEnz - The Enzyme Database: 
IUBMB Enzyme Nomenclature: 
ExPASy - ENZYME nomenclature database: 
BRENDA, the Enzyme Database: 
CAS: 
79079-13-3

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