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The Eighth Bacteriochlorophyll Completes the Excitation Energy Funnel in the FMO Protein.

Authors
Type
Published Article
Journal
The Journal of Physical Chemistry Letters
1948-7185
Publisher
American Chemical Society
Publication Date
Volume
2
Issue
2
Pages
93–98
Identifiers
DOI: 10.1021/jz101541b
PMID: 26295526
Source
Medline
Keywords
  • Fmo Complex Of Prosthecochloris Aestuarii.
  • Excitation Energy Transfer
  • Optical Properties Of A Pigment−Protein Complex
  • Site Energies
  • Structure-Based Calculations Of Optical Spectra

Abstract

The Fenna-Matthews-Olson (FMO) light-harvesting protein connects the outer antenna system (chlorosome/baseplate) with the reaction center complex in green sulfur bacteria. Since its first structure determination in the mid-70s, this pigment-protein complex has become an important model system to study excitation energy transfer. Recently, an additional bacteriochlorophyll a (the eighth) pigment was discovered in each subunit of this homotrimer. Our structure-based calculations of the optical properties of the FMO protein demonstrate that the eighth pigment is the linker to the baseplate, confirming recent suggestions from crystallographic studies.

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