title: Disruption of type III secretion in Salmonella enterica serovar Typhimurium by external guide sequences.
abstract: The type III secretion system involved in Salmonella enterica serovar Typhimurium invasion of host cells has been disrupted using inducibly expressed oligonucleotide external guide sequences (EGSs) complementary to invB or invC mRNA. These EGSs direct single site cleavage in these mRNAs by endogenous RNase P, and their expression in Salmonella results in invC mRNA and InvC protein depletion, decreased type III secretion and interference with host cell invasion. Comparison of these effects with those from studies of Salmonella invB and invC mutants suggests that invB EGSs have polar effects on invC mRNA.
authors.affiliation: Department of Molecular, Cellular and Developmental Biology, Yale University, New Haven, CT 06520, USA. McKinney_J@kids.wustl.edu
authors.forename: Jeffrey S
authors.initials: JS
authors.lastname: McKinney
authors.forename: Haifeng
authors.initials: H
authors.lastname: Zhang
authors.forename: Tomoko
authors.initials: T
authors.lastname: Kubori
authors.forename: Jorge E
authors.initials: JE
authors.lastname: Galán
authors.forename: Sidney
authors.initials: S
authors.lastname: Altman
mesh_terms: D001426:Bacterial Proteins / Q000235:genetics* / Q000378:metabolism; D015153:Blotting, Western; D002460:Cell Line; D015870:Gene Expression / Q000235:genetics; D015964:Gene Expression Regulation, Bacterial; D005798:Genes, Bacterial / Q000235:genetics; D009841:Oligonucleotides / Q000235:genetics / Q000378:metabolism*; D010641:Phenotype; D006180:Proton-Translocating ATPases / Q000172:deficiency / Q000235:genetics* / Q000378:metabolism; D012329:RNA, Bacterial / Q000235:genetics / Q000378:metabolism*; D012333:RNA, Messenger / Q000235:genetics / Q000378:metabolism; D043262:Ribonuclease P / Q000378:metabolism; D012486:Salmonella typhimurium / Q000235:genetics* / Q000378:metabolism* / Q000472:pathogenicity; D013379:Substrate Specificity; D058727:RNA, Small Untranslated
chemical_list: D001426:Bacterial Proteins; D009841:Oligonucleotides; D012329:RNA, Bacterial; D012333:RNA, Messenger; C088597:invB protein, Salmonella; C088598:invC protein, Salmonella typhimurium; D043262:Ribonuclease P; D006180:Proton-Translocating ATPases; D058727:RNA, Small Untranslated