Survey, analysis and genetic organization of genes encoding eukaryotic-like signaling proteins on a cyanobacterial genome.
Bacteria usually use two-component systems for signal transduction, while eukaryotic organisms employ Ser/Thr and Tyr kinases and phosphatases for the same purpose. Many prokaryotes turn out to harbor Ser/Thr and Tyr kinases, Ser/Thr and Tyr phosphatases, and their accessory components as well. The sequence determination of the genome of the cyanobacterium Synechocystis sp. strain PCC 6803 offers the possibility to survey the extent of such molecules in a prokaryotic organism. This cyanobacterium possesses seven Ser/Thr kinases, seven Ser/Thr and Tyr phosphatases, one protein kinase interacting protein, one protein kinase regulatory subunit and several WD40-repeat-containing proteins. The majority of the protein phosphatases presented in this study were previously reported as hypothetical proteins. We analyze here the structure and genetic organization of these ORFs in the hope of providing a guidance for their functional analysis. Unlike their eukaryotic counterparts, many of these genes are clustered on the chromosome, and this genetic organization offers the opportunity to study their possible interaction. In several cases, genes of two-component transducers are found within the same cluster as those encoding a Ser/Thr kinase or a Ser/Thr phosphatase; the implication for signal transduction mechanism will be discussed.
Unité d'Immunotechnologie et Microbiologie Moléculaires, Ecole Supérieure de Biotechnologie de Strasbourg, Université Louis Pasteur de Strasbourg, Boulevard Sébastien Brandt, F-67400 Illkirch, France. cheng-cai.zhang@esbs.u-strasbg.fr
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Gonzalez
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D000595:Amino Acid Sequence; D001426:Bacterial Proteins / Q000235:genetics*; D001483:Base Sequence; D000458:Cyanobacteria / Q000235:genetics* / Q000378:metabolism; D017931:DNA Primers / Q000235:genetics; D005057:Eukaryotic Cells; D005798:Genes, Bacterial; D016680:Genome, Bacterial; D008969:Molecular Sequence Data; D005810:Multigene Family; D010749:Phosphoprotein Phosphatases / Q000235:genetics; D016133:Polymerase Chain Reaction; D011387:Prokaryotic Cells; D017346:Protein Serine-Threonine Kinases / Q000235:genetics; D021382:Protein Sorting Signals / Q000235:genetics*; D017027:Protein Tyrosine Phosphatases / Q000235:genetics; D011505:Protein-Tyrosine Kinases / Q000235:genetics; D017386:Sequence Homology, Amino Acid
D001426:Bacterial Proteins; D017931:DNA Primers; D021382:Protein Sorting Signals; D011505:Protein-Tyrosine Kinases; D017346:Protein Serine-Threonine Kinases; D010749:Phosphoprotein Phosphatases; D017027:Protein Tyrosine Phosphatases