Molecular mechanism of energy conservation in polysulfide respiration.
Molecular mechanism of energy conservation in polysulfide respiration.
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DOI:
10.1038/nsmb.1434
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发表时间:
2008-07
影响因子:
16.8
通讯作者:
中科院分区:
文献类型:
--
作者:
Bacterial polysulfide reductase (PsrABC) is an integral membrane protein complex responsible for quinone coupled reduction of polysulfide, a process important in extreme environments such as deep-sea vents and hot springs. We determined the structure of polysulfide reductase from Thermus thermophilus at 2.4 Å resolution, revealing how the PsrA subunit recognizes and reduces its unique poly anionic substrate. The integral membrane subunit PsrC was characterized using the natural substrate menaquinone-7 and inhibitors, providing a comprehensive representation of a quinone binding site and revealing the presence of a water filled cavity connecting the quinone binding site on the periplasmic side to the cytoplasm. These results suggest that polysulfide reductase could be a key energy-conserving enzyme of the T. thermophilus respiratory chain, utilizing polysulfide as the terminal electron acceptor and pumping protons across the membrane via a previously unknown mechanism.
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影响因子:
64.8
作者:
IWATA, S;OSTERMEIER, C;MICHEL, H
通讯作者:
MICHEL, H
影响因子:
3.6
作者:
Hensel, M;Hinsley, AP;Berks, BC
通讯作者:
Berks, BC
影响因子:
3.6
作者:
Ansaldi, Mireille;Theraulaz, Laurence;Mejean, Vincent
通讯作者:
Mejean, Vincent
影响因子:
2.8
作者:
Ellington, MJK;Sawers, G;Ferguson, SJ
通讯作者:
Ferguson, SJ
DOI:
10.1107/s0907444998003254
发表时间:
1998-09-01
期刊:
ACTA CRYSTALLOGRAPHICA SECTION D-BIOLOGICAL CRYSTALLOGRAPHY
影响因子:
--
作者:
Brunger, AT;Adams, PD;Warren, GL
通讯作者:
Warren, GL