This domain is found in CdsD from Chlamydia trachomatis (Swiss:O84671) and similar sequences from Chlamydiia. CdsD is a structural contact-dependent secretion (Cds) protein that form part of the basal body of the type III secretion system (T3SS) inje ...
This domain is found in CdsD from Chlamydia trachomatis (Swiss:O84671) and similar sequences from Chlamydiia. CdsD is a structural contact-dependent secretion (Cds) protein that form part of the basal body of the type III secretion system (T3SS) injectisome of the bacteria. The periplasmic part of this protein contains at least 3 domains: PD1, PD2 (this entry) and PD3 (Pfam:PF04972), all of them sharing the same alpha-beta-beta-alpha-beta topology, known as the BON fold, in which the two antiparallel alpha-helices are on the same side of a three stranded beta-sheet [1,2].
This domain is found in a family of osmotic shock protection proteins (e.g. Swiss:P27291). It is also found in some Secretins and a group of potential haemolysins. Its likely function is attachment to phospholipid membranes [1].