title: Genome-wide survey of prokaryotic O-protein phosphatases.
abstract: Complex and diverse signal transduction circuits are responsible for the efficient functioning of cellular network. Protein kinases and O-protein phosphatases are primarily responsible for propagating such stimuli within a eukaryotic cell. However, there is limited understanding of O-protein phosphatases in the prokaryotic genomes. The availability of complete genome sequence information for several prokaryotes permits a genome-wide survey of O-protein phosphatases. The distribution of the various protein phosphatase families has been observed to be mosaic, with the exception of the members of the phospho protein family P (PPP), which is consistent with previous studies. The PPP family is ubiquitous in the prokaryotic world and undergoes the highest sequence divergence within a genome amongst phosphatases studied. The co-occurrence of low molecular mass tyrosine phosphatase (LMWPc) and PPP domain in a single polypeptide suggests that the protein present in Archaeoglobus fulgidus might represent the progenitor for all protein phosphatases. The curation of data on prokaryotic protein phosphatases provides a convenient framework for the analysis of domain architectures and for characterising structural and functional properties of this important family of signalling proteins.
authors.affiliation: National Centre for Biological Sciences, Tata Institute of Fundamental Research, UAS-GKVK Campus, Bangalore 560065, India.
authors.forename: Anirban
authors.initials: A
authors.lastname: Bhaduri
authors.forename: R
authors.initials: R
authors.lastname: Sowdhamini
mesh_terms: D000595:Amino Acid Sequence; D001105:Archaea / Q000201:enzymology / Q000235:genetics; D001419:Bacteria / Q000201:enzymology / Q000235:genetics; D001665:Binding Sites / Q000235:genetics; D005057:Eukaryotic Cells; D014644:Genetic Variation; D016678:Genome; D008958:Models, Molecular; D008969:Molecular Sequence Data; D010749:Phosphoprotein Phosphatases / Q000737:chemistry* / Q000235:genetics* / Q000378:metabolism; D010802:Phylogeny; D011387:Prokaryotic Cells; D011487:Protein Conformation; D017434:Protein Structure, Tertiary; D017386:Sequence Homology, Amino Acid; D015398:Signal Transduction
chemical_list: D010749:Phosphoprotein Phosphatases