Function
The tailspike protein (TSP) of bacteriophage is a trimeric protein which serves as the receptor-binding protein of the bacteriophage to its bacterial host[1]. O-antigen polysaccharides found on the outer surface of bacteria are the natural substrates for TSP[2].
Relevance
Bacteriophage research is becoming important due to the problem of antibiotics resistance. TSP binding to pathogenic bacteria can be used for their detection[3].
Structural highlights
The C-terminal domain (CTD) (residues 109-end) of TSP is responsible for the attachment of the tailspike protein to the O-antigen moiety on bacterial cell surface. The 3D structure of an bound to CTP of TSP shows [4].
3D structures of tailspike protein
Tailspike protein 3D structures
References
- ↑ Williams J, Venkatesan K, Ayariga JA, Jackson D, Wu H, Villafane R. A genetic analysis of an important hydrophobic interaction at the P22 tailspike protein N-terminal domain. Arch Virol. 2018 Jun;163(6):1623-1633. doi: 10.1007/s00705-018-3777-y. Epub 2018 , Mar 2. PMID:29500571 doi:http://dx.doi.org/10.1007/s00705-018-3777-y
- ↑ Andres D, Hanke C, Baxa U, Seul A, Barbirz S, Seckler R. Tailspike interactions with lipopolysaccharide effect DNA ejection from phage P22 particles in vitro. J Biol Chem. 2010 Nov 19;285(47):36768-75. doi: 10.1074/jbc.M110.169003. Epub, 2010 Sep 3. PMID:20817910 doi:http://dx.doi.org/10.1074/jbc.M110.169003
- ↑ Kunstmann S, Scheidt T, Buchwald S, Helm A, Mulard LA, Fruth A, Barbirz S. Bacteriophage Sf6 Tailspike Protein for Detection of Shigella flexneri Pathogens. Viruses. 2018 Aug 15;10(8). pii: v10080431. doi: 10.3390/v10080431. PMID:30111705 doi:http://dx.doi.org/10.3390/v10080431
- ↑ Andres D, Gohlke U, Broeker NK, Schulze S, Rabsch W, Heinemann U, Barbirz S, Seckler R. An essential serotype recognition pocket on phage P22 tailspike protein forces Salmonella enterica serovar Paratyphi A O-antigen fragments to bind as nonsolution conformers. Glycobiology. 2013 Apr;23(4):486-94. doi: 10.1093/glycob/cws224. Epub 2013 Jan 3. PMID:23292517 doi:http://dx.doi.org/10.1093/glycob/cws224