Characterization of the Soj/Spo0J chromosome segregation proteins and identification of putative parS sequences in Helicobacter pylori.
The Soj and Spo0J proteins, together with one or more parS sequences, are crucial to chromosome segregation and the progression of cell cycle in many bacteria. In Helicobacter pylori, genes coding for Soj and a plasmid replication-partition-related protein containing a Spo0J or ParB conserved domain, together with two putative parS sites identified in this study, were found to be located within the origin-proximal 20-30% of the circular chromosome. Recombinant H. pylori Spo0J bound specifically to the two putative parS sequences and that of Bacillus subtilis. In addition, hydrolysis of ATP by H. pylori Soj was accelerated in the presence of parS and/or Spo0J. Protein-protein interactions, intracellular levels, and subcellular localization of Soj and Spo0J were analyzed through polyclonal antibodies directed against recombinant Soj and Spo0J. This study was the first implication of the existence of a functional parABS system in H. pylori.
Institute of Biotechnology, National Tsing Hua University, Hsinchu 30013, Taiwan.
Mon-Juan
MJ
Lee
Chien-Hung
CH
Liu
Sin-Yuan
SY
Wang
Chung-Ter
CT
Huang
Haimei
H
Huang
D000251:Adenosine Triphosphatases / Q000378:metabolism; D001426:Bacterial Proteins / Q000378:metabolism*; D020090:Chromosome Segregation; D004268:DNA-Binding Proteins / Q000378:metabolism; D016480:Helicobacter pylori / Q000166:cytology / Q000235:genetics* / Q000378:metabolism*; D047468:Immunoprecipitation; D008970:Molecular Weight; D021381:Protein Transport; D011994:Recombinant Proteins / Q000378:metabolism; D012045:Regulatory Sequences, Nucleic Acid / Q000235:genetics*; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA
D001426:Bacterial Proteins; D004268:DNA-Binding Proteins; D011994:Recombinant Proteins; D000251:Adenosine Triphosphatases