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pCP29黄杆菌-大肠杆菌穿梭载体质粒 BioVector NTCC质粒载体菌种细胞基因保藏中心

  • 价  格:¥49865
  • 货  号:pCP29黄杆菌-大肠杆菌穿梭载体质粒
  • 产  地:北京
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pCP29黄杆菌-大肠杆菌穿梭载体质粒
The mechanism of bacterial gliding motility (active movement over surfaces without the aid of flagella) is not known. A large number of nonmotile mutants of the gliding bacterium Flavobacterium johnsoniae (Cytophaga johnsonae) have been previously isolated, and genetic techniques to analyze these mutants have recently been developed. We complemented a nonmotile mutant of F. johnsoniae (UW102-09) with a library of wild-type DNA by using the shuttle cosmid pCP17. The complementing plasmid (pCP100) contained an insert of 13 kbp, and restored motility to 4 of 61 independently isolated nonmotile mutants. A 1.3-kbp fragment that encompassed a single ORF, gldA, complemented all four mutants. Disruption of the chromosomal copy of gldA in wild-type F. johnsoniae UW101 eliminated gliding motility. The predicted protein produced by gldA has strong sequence similarity to ATP binding cassette transport proteins.
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