FACTORS CONTROLLING THE BINDING OF 2 PROTONS PER ELECTRON TRANSFERRED THROUGH THE UBIQUINONE AND CYTOCHROME B-C2 SEGMENT OF RHODOPSEUDOMONAS-SPHAEROIDES CHROMATOPHORES

被引：56

作者：

PETTY, K ^{[1
]}

JACKSON, JB ^{[1
]}

DUTTON, PL ^{[1
]}

机构：

[1] UNIV PENN,DEPT BIOCHEM & BIOPHYS,PHILADELPHIA,PA 19104

来源：

BIOCHIMICA ET BIOPHYSICA ACTA | 1979年 / 546卷 / 01期

关键词：

(Rhodopseudomonas sphaeroides); Electron transport; photosynthetic bacterium; Proton transport;

D O I：

10.1016/0005-2728(79)90167-1

中图分类号：

Q5 [生物化学]; Q7 [分子生物学];

学科分类号：

071010 ; 081704 ;

摘要：

1. 1. On every turnover, 2.0 protons can be bound by the membrane for each single electron moving through the Q-b c2 oxidoreductase. 2. 2. One proton (H+II) binding reaction is, and one (H+I) is not, sensitive to antimycin. 3. 3. The redox states of electron transfer components other than the proton binding agents can affect both the rate of proton uptake and the apparent pK values on the agents binding the protons. 4. 4. The presence of valinomycin under certain well-defined conditions can strongly influence the value of the measured pK on the H+II binding agent. © 1979.

引用

页码：17 / 42

页数：26

共 51 条

[1] UBIQUINONE REDUCTION AND PROTON UPTAKE BY CHROMATOPHORES OF RHODOPSEUDOMONAS-SPHAEROIDES R-26 - PERIODICITY OF 2 IN CONSECUTIVE LIGHT-FLASHES [J].