Model for the light-harvesting complex I (B875) of Rhodobacter sphaeroides

被引：92

作者：

Hu, X ^{[1
]}

Schulten, K ^{[1
]}

机构：

[1] Univ Illinois, Dept Phys, Beckman Inst 3147, Urbana, IL 61801 USA

来源：

BIOPHYSICAL JOURNAL | 1998年 / 75卷 / 02期

关键词：

D O I：

10.1016/S0006-3495(98)77558-7

中图分类号：

Q6 [生物物理学];

学科分类号：

071011 ;

摘要：

The light-harvesting complex I (LH-I) of Rhodobacter sphaeroides has been modeled computationally as a hexadecamer of alpha beta-heterodimers, based on a close homology of the heterodimer to that of light-harvesting complex II (LH-II) of Rhodospirillum molischianum. The resulting LH-I structure yields an electron density projection map that is in agreement with an 8.5-Angstrom resolution electron microscopic projection map for the highly homologous LH-I of Rs. rubrum. A complex of the modeled LH-I with the photosynthetic reaction center of the same species has been obtained by a constrained conformational search. This complex and the available structures of LH-II from Rs. molischianum and Rhodopseudomonas acidophila furnish a complete model of the pigment organization in the photosynthetic membrane of purple bacteria.

引用

页码：683 / 694

页数：12

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