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Structure paper

TitleStructural basis for electron transport mechanism of complex I-like photosynthetic NAD(P)H dehydrogenase.
Journal, issue, pagesNat Commun, Vol. 11, Issue 1, Page 610, Year 2020
Publish dateJan 30, 2020
AuthorsXiaowei Pan / Duanfang Cao / Fen Xie / Fang Xu / Xiaodong Su / Hualing Mi / Xinzheng Zhang / Mei Li /
PubMed AbstractNAD(P)H dehydrogenase-like (NDH) complex NDH-1L of cyanobacteria plays a crucial role in cyclic electron flow (CEF) around photosystem I and respiration processes. NDH-1L couples the electron ...NAD(P)H dehydrogenase-like (NDH) complex NDH-1L of cyanobacteria plays a crucial role in cyclic electron flow (CEF) around photosystem I and respiration processes. NDH-1L couples the electron transport from ferredoxin (Fd) to plastoquinone (PQ) and proton pumping from cytoplasm to the lumen that drives the ATP production. NDH-1L-dependent CEF increases the ATP/NADPH ratio, and is therefore pivotal for oxygenic phototrophs to function under stress. Here we report two structures of NDH-1L from Thermosynechococcus elongatus BP-1, in complex with one Fd and an endogenous PQ, respectively. Our structures represent the complete model of cyanobacterial NDH-1L, revealing the binding manner of NDH-1L with Fd and PQ, as well as the structural elements crucial for proper functioning of the NDH-1L complex. Together, our data provides deep insights into the electron transport from Fd to PQ, and its coupling with proton translocation in NDH-1L.
External linksNat Commun / PubMed:32001694 / PubMed Central
MethodsEM (single particle)
Resolution3.0 Å
Structure data

9989

6khi

EMDB-9989, PDB-6khi:
Supercomplex for cylic electron transport in cyanobacteria
Method: EM (single particle) / Resolution: 3.0 Å

9990

6khj

EMDB-9990, PDB-6khj:
Supercomplex for electron transfer
Method: EM (single particle) / Resolution: 3.0 Å

Chemicals

ChemComp-DGD:
DIGALACTOSYL DIACYL GLYCEROL (DGDG)

ChemComp-LHG:
1,2-DIPALMITOYL-PHOSPHATIDYL-GLYCEROLE / phospholipid*YM

ChemComp-SQD:
1,2-DI-O-ACYL-3-O-[6-DEOXY-6-SULFO-ALPHA-D-GLUCOPYRANOSYL]-SN-GLYCEROL

ChemComp-BCR:
BETA-CAROTENE

ChemComp-LMG:
1,2-DISTEAROYL-MONOGALACTOSYL-DIGLYCERIDE

ChemComp-SF4:
IRON/SULFUR CLUSTER

ChemComp-FES:
FE2/S2 (INORGANIC) CLUSTER

ChemComp-PL9:
2,3-DIMETHYL-5-(3,7,11,15,19,23,27,31,35-NONAMETHYL-2,6,10,14,18,22,26,30,34-HEXATRIACONTANONAENYL-2,5-CYCLOHEXADIENE-1,4-DIONE-2,3-DIMETHYL-5-SOLANESYL-1,4-BENZOQUINONE

ChemComp-LMT:
DODECYL-BETA-D-MALTOSIDE / detergent*YM

Source
  • thermosynechococcus elongatus bp-1 (bacteria)
  • thermosynechococcus elongatus (strain bp-1) (bacteria)
KeywordsELECTRON TRANSPORT / Cylic electron transport / photosynthetic NDH complex / Cyanobacteria / Supercomplex / cyclic electron transport

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