TABLE 4.

Distribution of tRNA-associated elements within different gram-negative bacteriaa

Species, serovar, or strainbPresence of hybridization signal
tRNAArgUtRNAArgWtRNAProLtRNAPheU
apeEorf0557pgtEnupCsspH2msgAvexEpilV
S. enterica serovar Typhimurium 12023++++++
S. enterica serovar Typhi++++++++
S. enterica serovar Typhimurium LT2++++++
E. coli DH5α+
EPEC (2)+
EHEC (2)+
ETEC+
EIEC+
EAEC+
Enterobacter cloacae+
Shigella flexneri (2)+
Klebsiella pneumoniae (2)+
Pseudomonas aeruginosa (3)
Yersinia enterocolitica (2)+
Yersinia pseudotuberculosis+
Vibrio cholerae+
  • a Various gram-negative laboratory strains or pathogens isolated from clinical samples were analyzed by Southern hybridization for the presence of apeE and orf0553 (tRNAArgU), pgtE and nupC (tRNAArgW), sspH2 and msgA (tRNAProL), and vexE and pilV (tRNAPheU).

  • b The number of clinical isolates analyzed is indicated in parentheses. EPEC, enteropathogenic E. coli; ETEC, enterotoxigenic E. coli; EIEC, enteroinvasive E. coli; EAEC, enteroaggregative E. coli.