[Functional analysis of promoters of Vibrio cholerea typing phage VP1 with reporter system].
Phage VP1 infects and lyses Vibrio cholerae. The VP1 genome is a circular double-strand DNA and its size is 32176 base pairs. Analysis of the sequence of the VP1 genome revealed the presence of 15 putative promoter sequence. The activities of these putative promoters in V. cholerae were assayed by transformation of reporter gene plasmid and phage infection together. Promoter regions were ligated into pRS1274/BamH I/EcoR I. Then transformed into E. coli JM109 and all of clone display blue. The recombinant plasmids were transformed into V. cholerae 7743 deltaZ by electroporation, then bacteriophage VP1 infect transformant. The time-course expressing lacZ gene and detecting change of beta-galactosidase enzyme activity in V. cholerae transformants at latent period, indicated P17 probably is a early promoter; P2 and P3 and P9 etc are medium-term promoters; P18 is a late promoter.
Li
Yan-Ping
YP
Jiangxi-OAI Joint Research Institute, Nanchang University, Nanchang 330047, China. yanpingli@126.com
Liang
Wei-Li
WL
Wang
Duo-Chun
DC
Qi
Guo-Ming
GM
Kan
Biao
B
Gao
Shou-Yi
SY
Liu
Yan-Qing
YQ
D001434:Bacteriophage Typing; D001435:Bacteriophages / Q000235:genetics*; D004261:DNA Replication; D017930:Genes, Reporter; D016133:Polymerase Chain Reaction; D011401:Promoter Regions, Genetic; D014734:Vibrio cholerae / Q000145:classification / Q000821:virology*