Molecular origins and consequences of High-800 LH2 in Roseobacter denitrificans. - Archive ouverte HAL Access content directly
Journal Articles Biochemistry Year : 2011

Molecular origins and consequences of High-800 LH2 in Roseobacter denitrificans.

Abstract

Roseobacter denitrificans is a marine bacterium capable of using a wide variety of different metabolic schemes and in particular is an anoxygenic aerobic photosynthetic bacterium. In the work reported here we use a deletion mutant that we have constructed to investigate the structural origin of the unusual High-800 light-harvesting complex absorption in this bacterium. We suggest that the structure is essentially unaltered when compared to the usual nonameric complexes but that a change in the environment of the C(13:1) carbonyl group is responsible for the change in spectrum. We tentatively relate this change to the presence of a serine residue in the α-polypeptide. Surprisingly, the low spectral overlap between the peripheral and core light-harvesting systems appears not to compromise energy collection efficiency too severely. We suggest that this may be at the expense of maintaining a low antenna size.
No file

Dates and versions

hal-01458268 , version 1 (06-02-2017)

Identifiers

Cite

Katia Duquesne, Cecile Blanchard, James N. Sturgis. Molecular origins and consequences of High-800 LH2 in Roseobacter denitrificans.. Biochemistry, 2011, 50 (31), pp.6723--9. ⟨10.1021/bi200538j⟩. ⟨hal-01458268⟩
22 View
0 Download

Altmetric

Share

Gmail Facebook Twitter LinkedIn More