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

Xiche Hu, Klaus Schulten

Research output: Contribution to journalArticlepeer-review

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 languageEnglish (US)
Pages (from-to)683-694
Number of pages12
JournalBiophysical journal
Volume75
Issue number2
DOIs
StatePublished - Aug 1998

ASJC Scopus subject areas

  • Biophysics

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