Abstract:
:The chromatophore membrane of the photosynthetic diazotroph Rhodospirillum rubrum is of vital importance for a number of central processes, including nitrogen fixation. Using a novel amphiphile, we have identified protein complexes present under different nitrogen availability conditions by the use of two-dimensional Blue Native/SDS-PAGE and NSI-LC-LTQ-Orbitrap mass spectrometry. We have identified several membrane protein complexes, including components of the ATP synthase, reaction center, light harvesting, and NADH dehydrogenase complexes. Additionally, we have identified differentially expressed proteins, such as subunits of the succinate dehydrogenase complex and other TCA cycle enzymes that are usually found in the cytosol, thus hinting at a possible association to the membrane in response to nitrogen deficiency. We propose a redox sensing mechanism that can influence the membrane subproteome in response to nitrogen availability.
journal_name
J Proteome Resjournal_title
Journal of proteome researchauthors
Selao TT,Branca R,Chae PS,Lehtiö J,Gellman SH,Rasmussen SG,Nordlund S,Norén Adoi
10.1021/pr100838xsubject
Has Abstractpub_date
2011-06-03 00:00:00pages
2703-14issue
6eissn
1535-3893issn
1535-3907journal_volume
10pub_type
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