This domain is found at the N-terminal end of Pesticin from Yersinia pestis (Pst). Pst is a toxin that kills related bacteria of the same niche as Y.pestis. It is organised into three domains: an N-terminal translocation domain, the intermediate receptor binding domain (RB, this entry), and a C-terminal activity domain (Pfam:PF16754). This domain shows a beta-sheet of seven anti-parallel beta-strands together with three helices. It is essential for the intimate contact with the outer membrane protein receptor [1,2].

1: Structural and mechanistic studies of pesticin, a bacterial homolog of phage lysozymes. Patzer SI, Albrecht R, Braun V, Zeth K; J Biol Chem. 2012;287:23381-23396. PMID:22593569

2: Structural engineering of a phage lysin that targets gram-negative pathogens. Lukacik P, Barnard TJ, Keller PW, Chaturvedi KS, Seddiki N, Fairman JW, Noinaj N, Kirby TL, Henderson JP, Steven AC, Hinnebusch BJ, Buchanan SK; Proc Natl Acad Sci U S A. 2012;109:9857-9862. PMID:22679291