{Reference Type}: Journal Article {Title}: In vivo inhibition of TonB-dependent processes by a TonB box consensus pentapeptide. {Author}: Tuckman M;Osburne MS; {Journal}: J Bacteriol {Volume}: 174 {Issue}: 1 {Year}: Jan 1992 {Factor}: 3.476 {DOI}: 10.1128/jb.174.1.320-323.1992 {Abstract}: The TonB box, a conserved pentapeptide sequence found in TonB-dependent colicins and receptors, is thought to interact physically with the TonB protein to facilitate TonB-dependent processes. Strains of Escherichia coli were treated in vivo with the synthetic TonB box pentapeptide Glu-Thr-Val-Ile-Val. The pentapeptide inhibited several TonB-dependent processes, including cell growth in low-iron medium, phi 80 infection, and killing by colicins B and Ia. Two unrelated control pentapeptides had no effect on TonB-dependent processes.