Comparison of aerobic and photosynthetic Rhodobacter sphaeroides 2.4.1 proteomes.
The analysis of proteomes from aerobic and photosynthetic Rhodobacter sphaeroides 2.4.1 cell cultures by liquid chromatography-mass spectrometry yielded approximately 6,500 high confidence peptides representing 1,675 gene products (39% of the predicted proteins). The identified proteins corresponded primarily to open reading frames (ORFs) contained within the two chromosomal elements of this bacterium, but a significant number were also observed from ORFs associated with 5 naturally occurring plasmids. Using the accurate mass and time (AMT) tag approach, comparative studies showed that a number of proteins were uniquely detected within the photosynthetic cell culture. The estimated abundances of proteins observed in both aerobic respiratory and photosynthetic grown cultures were compared to provide insights into bioenergetic models for both modes of growth. Additional emphasis was placed on gene products annotated as hypothetical to gain information as to their potential roles within these two growth conditions. Where possible, transcriptome and proteome data for R. sphaeroides obtained under the same culture conditions were also compared.
Callister
Stephen J
SJ
Biological Separations and Mass Spectrometry, Mail Stop, K8-98, Pacific Northwest National Laboratory, Richland, WA 99352, USA.
Nicora
Carrie D
CD
Zeng
Xiaohua
X
Roh
Jung Hyeob
JH
Dominguez
Miguel A
MA
Tavano
Christine L
CL
Monroe
Matthew E
ME
Kaplan
Samuel
S
Donohue
Timothy J
TJ
Smith
Richard D
RD
Lipton
Mary S
MS
D000332:Aerobiosis; D001426:Bacterial Proteins / Q000032:analysis*; D002853:Chromatography, Liquid; D002876:Chromosomes, Bacterial; D005798:Genes, Bacterial; D013058:Mass Spectrometry; D016366:Open Reading Frames; D010788:Photosynthesis; D010957:Plasmids; D020543:Proteome; D012242:Rhodobacter sphaeroides / Q000737:chemistry* / Q000235:genetics / Q000378:metabolism
D001426:Bacterial Proteins; D020543:Proteome