title: Comparison of aerobic and photosynthetic Rhodobacter sphaeroides 2.4.1 proteomes.
abstract: 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.
authors.affiliation: Biological Separations and Mass Spectrometry, Mail Stop, K8-98, Pacific Northwest National Laboratory, Richland, WA 99352, USA.
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Callister
authors.forename: Carrie D
authors.initials: CD
authors.lastname: Nicora
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Zeng
authors.forename: Jung Hyeob
authors.initials: JH
authors.lastname: Roh
authors.forename: Miguel A
authors.initials: MA
authors.lastname: Dominguez
authors.forename: Christine L
authors.initials: CL
authors.lastname: Tavano
authors.forename: Matthew E
authors.initials: ME
authors.lastname: Monroe
authors.forename: Samuel
authors.initials: S
authors.lastname: Kaplan
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Donohue
authors.forename: Richard D
authors.initials: RD
authors.lastname: Smith
authors.forename: Mary S
authors.initials: MS
authors.lastname: Lipton
mesh_terms: 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
chemical_list: D001426:Bacterial Proteins; D020543:Proteome