ANTENNA ORGANIZATION OF RHODOPSEUDOMONAS-ACIDOPHILA - A STUDY OF THE EXCITATION MIGRATION

被引：36

作者：

DEINUM, G ^{[1
]}

OTTE, SCM ^{[1
]}

GARDINER, AT ^{[1
]}

AARTSMA, TJ ^{[1
]}

COGDELL, RJ ^{[1
]}

AMESZ, J ^{[1
]}

机构：

[1] UNIV GLASGOW,DEPT BOT,GLASGOW G12 8QQ,SCOTLAND

来源：

BIOCHIMICA ET BIOPHYSICA ACTA | 1991年 / 1060卷 / 01期

关键词：

EXCITATION ANNIHILATION; FLUORESCENCE YIELD; BACTERIOCHLOROPHYLL; ANTENNA COMPLEX; (RPS-ACIDOPHILA);

D O I：

10.1016/S0005-2728(05)80127-6

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：

Transfer of excitation energy was studied in three different cultures of the purple bacterium Rhodopseudomonas acidophila, which all contained the core antenna complex B880, but differed with respect to the type of peripheral antenna complex, which was either B800-820, B800-850, or both. Contrary to that of B800-850, the fluorescence emitted by B800-820 did not increase upon light-induced oxidation of P-870. Singlet-singlet annihilation measurements showed that in cells containing only B880 and B800-820 energy transfer can take place within a domain of 50 +/- 20 bacteriochlorophyll (BChl) molecules, which number equals that of BChls per reaction center. In cells containing B800-850 energy transfer can take place over at least 200 BChls of B880. Our results are explained by a model where small clusters of B880, the size of one photosynthetic unit, are separated from each other by a more or less continuous array of B800-820 or B800-850 complexes. B800-820, but not B800-850, acts as an energy barrier between different B880 units.

引用

页码：125 / 131

页数：7

共 23 条

[1] CONTROL OF SYNTHESIS OF REACTION CENTER BACTERIOCHLOROPHYLL IN PHOTOSYNTHETIC BACTERIA [J].