This family contains several Chlamydia polymorphic membrane proteins. Chlamydia pneumoniae is an obligate intracellular bacterium and a common human pathogen causing infection of the upper and lower respiratory tract. This domain is found between the beta-helical repeats (Pfam:PF02415) and the C-terminal Pfam:PF03797. This domain is excised subsequent to secretion [2].

1: The Chlamydophila abortus genome sequence reveals an array of variable proteins that contribute to interspecies variation. Thomson NR, Yeats C, Bell K, Holden MT, Bentley SD, Livingstone M, Cerdeno-Tarraga AM, Harris B, Doggett J, Ormond D, Mungall K, Clarke K, Feltwell T, Hance Z, Sanders M, Quail MA, Price C, Barrell BG, Parkhill J, Longbottom D; Genome Res 2005;15:629-640. PMID:15837807

2: From the inside out--processing of the Chlamydial autotransporter PmpD and its role in bacterial adhesion and activation of human host cells. Wehrl W, Brinkmann V, Jungblut PR, Meyer TF, Szczepek AJ; Mol Microbiol 2004;51:319-334. PMID:14756775