title: [Cloning and bioinformatics analysis of recombinant methyl-accepting chemotaxis signal transduction protein of Helicobacter hepaticus].
abstract: OBJECTIVE
  To clone the gene encoding methyl-accepting chemotaxis signal transduction protein (MCSTP) of Helicobacter hepaticus and analyze the gene structures using bioinformatics methods.
  
  
  METHODS
  With the specific primer of Helicobacter hepaticus MCSTP c1977, MCSTP gene was amplified by PCR from the genomic DNA of Helicobacter hepaticus and ligated to the prokaryotic expression vector pET22b(+). After sequencing, the sequence homology and structural feature of MCSTP gene were analyzed by bioinformatics method.
  
  
  RESULTS
  A 99% similarity was identified between MCSTP gene cloned and its counterpart in standard Helicobacter hepaticus strain ATCC51449 genome DNA published by GenBank, with only a replacement of A by T at 1160 bp. A low homology was found in the MCSTP genes between Helicobacter hepaticus, Campylobacter jejuni and Helicobacter pylori by bioinformatics analysis, suggesting the specificity of MCSTP gene in Helicobacter hepaticus among the microbes.
  
  
  CONCLUSIONS
  The prokaryotic expression plasmid pET22b(+)/MCSTP is constructed successfully, and the bioinformatics analysis provided evidences and clues for further study of the biological functions and pathogenic mechanism of MCSTP.
authors.affiliation: Institute of Digestive Diseases, Nanfang Hospital, Southern Medical University, Guangzhou, China. nlycloud@hotmail.com
authors.forename: Ling-Yun
authors.initials: LY
authors.lastname: Niu
authors.forename: Yang
authors.initials: Y
authors.lastname: Bai
authors.forename: Zheng
authors.initials: Z
authors.lastname: Guo
authors.forename: Guo-Sheng
authors.initials: GS
authors.lastname: Xia
authors.forename: Jing
authors.initials: J
authors.lastname: Li
authors.forename: He-Ping
authors.initials: HP
authors.lastname: Qin
authors.forename: Ji-de
authors.initials: JD
authors.lastname: Wang
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics / Q000378:metabolism*; D003001:Cloning, Molecular; D019295:Computational Biology / Q000379:methods; D005822:Genetic Vectors / Q000235:genetics; D044923:Helicobacter hepaticus / Q000235:genetics* / Q000302:isolation & purification / Q000378:metabolism; D008565:Membrane Proteins / Q000235:genetics / Q000378:metabolism*; D000072236:Methyl-Accepting Chemotaxis Proteins; D011993:Recombinant Fusion Proteins / Q000235:genetics / Q000378:metabolism; D015398:Signal Transduction
chemical_list: D001426:Bacterial Proteins; D008565:Membrane Proteins; D000072236:Methyl-Accepting Chemotaxis Proteins; D011993:Recombinant Fusion Proteins