Rhodopirellula baltica is a marine, aerobic, heterotrophic bacterium belonging to the phylum Planctomycetes, found in the Baltic Sea . Planctomycetes are known for their unique cell structures and life cycles, differing from typical bacteria . R. baltica cells undergo growth phase-dependent changes in protein composition, influencing their morphology, including motile swarmer cells and sessile cell aggregates .
Proteomic studies of R. baltica have identified a large number of proteins, enhancing our understanding of its cellular processes. A detailed proteome analysis of growing R. baltica cells identified 1115 nonredundant proteins from the intracellular proteome and cell wall fractions . Including 709 novel proteins, the R. baltica proteomic dataset consists of 1267 unique proteins, accounting for 17.3% of the total putative protein-coding ORFs .
The UPF0753 protein family, to which RB1129 belongs, contains proteins with unknown function . Proteins of unknown function were found to be up- or downregulated in the stationary phase, suggesting they may play a role in adapting to changing environmental conditions .
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This protein is a component of an energy-coupled inorganic carbon pump.
KEGG: rba:RB1129
STRING: 243090.RB1129