Functional basis of electron transport within photosynthetic complex I.
Functional basis of electron transport within photosynthetic complex I.
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DOI:
10.1038/s41467-021-25527-1
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发表时间:
2021-09-10
影响因子:
16.6
通讯作者:
Roessler MM
中科院分区:
文献类型:
--
作者:
Richardson KH;Wright JJ;Šimėnas M;Thiemann J;Esteves AM;McGuire G;Myers WK;Morton JJL;Hippler M;Nowaczyk MM;Hanke GT;Roessler MM
Photosynthesis and respiration rely upon a proton gradient to produce ATP. In photosynthesis, the Respiratory Complex I homologue, Photosynthetic Complex I (PS-CI) is proposed to couple ferredoxin oxidation and plastoquinone reduction to proton pumping across thylakoid membranes. However, little is known about the PS-CI molecular mechanism and attempts to understand its function have previously been frustrated by its large size and high lability. Here, we overcome these challenges by pushing the limits in sample size and spectroscopic sensitivity, to determine arguably the most important property of any electron transport enzyme – the reduction potentials of its cofactors, in this case the iron-sulphur clusters of PS-CI (N0, N1 and N2), and unambiguously assign them to the structure using double electron-electron resonance. We have thus determined the bioenergetics of the electron transfer relay and provide insight into the mechanism of PS-CI, laying the foundations for understanding of how this important bioenergetic complex functions. Photosynthetic Complex I (PS-CI) is proposed to couple ferredoxin oxidation and plastoquinone reduction to proton pumping across thylakoid membranes. Here the authors determine the reduction potentials of the iron-sulphur clusters of PS-CI and thus the bioenergetics of the electron transfer relay.
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影响因子:
16.6
作者:
Bridges HR;Fedor JG;Blaza JN;Di Luca A;Jussupow A;Jarman OD;Wright JJ;Agip AA;Gamiz-Hernandez AP;Roessler MM;Kaila VRI;Hirst J
通讯作者:
Hirst J
影响因子:
64.8
作者:
Efremov, Rouslan G.;Sazanov, Leonid A.
通讯作者:
Sazanov, Leonid A.
影响因子:
4.1
作者:
INGLEDEW, WJ;OHNISHI, T
通讯作者:
OHNISHI, T
影响因子:
56.9
作者:
Kampjut, Domen;Sazanov, Leonid A.
通讯作者:
Sazanov, Leonid A.
DOI:
10.1073/pnas.0510977103
发表时间:
2006-05-16
影响因子:
11.1
作者:
Kussmaul, Lothar;Hirst, Judy
通讯作者:
Hirst, Judy