Abstract
The light-harvesting complex I (LH-I) of Rhodobacter sphaeroides has been modeled computationally as a hexadecamer of αβ-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-Å 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.
Original language | English (US) |
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Pages (from-to) | 683-694 |
Number of pages | 12 |
Journal | Biophysical journal |
Volume | 75 |
Issue number | 2 |
DOIs | |
State | Published - Aug 1998 |
ASJC Scopus subject areas
- Biophysics