Function
Structural component of the distal part of the tail. Mediates T5 binding to its host receptor, the E.coli outer membrane ferrichrome transporter fhuA protein. Upon binding to host FhuA, pb5 undergoes conformational changes that are probably the key to the transmission of the signal through the tail to the capsid, triggering DNA release.
Sequence
MSFFAGKLNNKSILSLRRGSGGDTNQHINPDSQTIFHSDMSHVIITETHSTGLRLDQGAGDYYWSEMPSRVTQLHNNDPNRVVLTEIEFSDGSRHMLSGMSMGVGAKAYGIINPQIMSQGGLKTQITASADLSLDVGYFNTGTSGTIPQKLRDGTGCQHMFGAFSGRRGFASSAMYLGGAALYKSAWSGSGYVVADAGTLTIPSDYVRHPGARNFGFNAIYVRGRSCNRVLYGMEGPNYTTGGAVQGASSSGALNFTYNPSNPESPKYSVGFARADPTNYAYWESMGDPNDSANGPIGIYSEHLGIYPSKITWYVTNLVYNGSGYNIDGGLFNGNDIKLSPREFIIKGVNVNNTSWKFINFIEKNFNVGNRADFRDVGCNLSKDSPSTGISGIATFGLPTTESNNAPSIKGGNVGGLHANVVSIYNFLPSASWYVSSNPPKIGNNYGDVWSENLLPLRLLGGSGSTILSGNIVFQGNGSVHVGTVGLDLNSSRNGAIVCTMEFIDDTWLSAGGIGCFNPTEMLSQGAEYGDSRFRIGGNTINKKLHQILSLPAGEYVPFFTIKGTVVNACKLQAAAYNPTPYWVSGLPGSVGQTGYYTLTYYMRNDGNNNISIWLDSSMSNIIGMKACLPNIKLIIQRLT