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Title | Structural basis for electron transport mechanism of complex I-like photosynthetic NAD(P)H dehydrogenase. |
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Journal, issue, pages | Nat Commun, Vol. 11, Issue 1, Page 610, Year 2020 |
Publish date | Jan 30, 2020 |
Authors | Xiaowei Pan / Duanfang Cao / Fen Xie / Fang Xu / Xiaodong Su / Hualing Mi / Xinzheng Zhang / Mei Li / |
PubMed Abstract | 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 ...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 links | Nat Commun / PubMed:32001694 / PubMed Central |
Methods | EM (single particle) |
Resolution | 3.0 Å |
Structure data | |
Chemicals | ChemComp-DGD: ChemComp-LHG: ChemComp-SQD: ChemComp-BCR: ChemComp-LMG: ChemComp-SF4: ChemComp-FES: ChemComp-PL9: ChemComp-LMT: |
Source |
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Keywords | ELECTRON TRANSPORT / Cylic electron transport / photosynthetic NDH complex / Cyanobacteria / Supercomplex / cyclic electron transport |