Mutations that modify or exclude binding of the QA ubiquinone and carotenoid in the reaction center from Rhodobacter sphaeroides
Mutations that modify or exclude binding of the QA ubiquinone and carotenoid in the reaction center from Rhodobacter sphaeroides
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修饰或排除球形红杆菌反应中心中 QA 泛醌和类胡萝卜素结合的突变
DOI:
10.1023/a:1006111321083
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发表时间:
2004
影响因子:
3.7
通讯作者:
Michael R. Jones
中科院分区:
文献类型:
--
作者:
J. P. Ridge;M. V. van Brederode;M. G. Goodwin;R. Grondelle;Michael R. Jones
Three single-site mutations have been introduced at positions close to the QA ubiquinone in the reaction centre from Rhodobacter sphaeroides. Two of these mutations, Ala M260 to Trp and Ala M248 to Trp, result in a reaction centre that does not support photosynthetic growth of the bacterium, and in which electron transfer to the QA ubiquinone is abolished. In the reaction centre with an Ala to Trp mutation at the M260 residue, electron transfer from the primary donor to the acceptor bacteriopheophytin is not affected by the mutation, but electron transfer from the acceptor bacteriopheophytin to QA is not observed. The most likely basis for these effects is that the mutation produces a structural change that excludes binding of the QA ubiquinone. A third mutation, Leu M215 to Trp, produces a reaction centre that has an impaired capacity for supporting photosynthetic growth. The mutation changes the nature of ubiquinone binding at the QA site, and renders the site sensitive to quinone site inhibitors such as o- phenanthroline. Adopting a similar approach, in which a small residue located close to a cofactor is changed to a more bulky residue, we show that the reaction centre can be rendered carotenoid-less by the mutation Gly M71 to Leu.
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影响因子:
2.9
作者:
CHANG, CH;ELKABBANI, O;SCHIFFER, M
通讯作者:
SCHIFFER, M
DOI:
10.1016/0005-2728(86)90243-4
发表时间:
1986
期刊:
Biochimica et biophysica acta
影响因子:
--
作者:
Woodbury,NW;Parson,WW;Gunner,MR;Prince,RC;Dutton,PL
通讯作者:
Dutton,PL
影响因子:
56.9
作者:
Stowell, MHB;McPhillips, TM;Feher, G
通讯作者:
Feher, G
DOI:
10.1073/pnas.84.16.5730
发表时间:
1987-08-01
影响因子:
11.1
作者:
ALLEN, JP;FEHER, G;REES, DC
通讯作者:
REES, DC
DOI:
10.1126/science.2192455
发表时间:
1990
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Robles,SJ;Breton,J;Youvan,DC
通讯作者:
Youvan,DC