The dockerin repeat is the binding partner of the cohesin domain Pfam:PF00963. The cohesin-dockerin interaction is the crucial interaction for complex formation in the cellulosome [1]. The dockerin repeats, each bearing homology to the EF-hand calcium-binding loop bind calcium [2]. This family contains two copies of the repeat.

1: The cellulosome concept as an efficient microbial strategy for the degradation of insoluble polysaccharides [In Process Citation] Shoham Y, Lamed R, Bayer EA; Trends Microbiol 1999;7:275-281. PMID:10390637

2: Secondary structure and calcium-induced folding of the Clostridium thermocellum dockerin domain determined by NMR spectroscopy. Lytle BL, Volkman BF, Westler WM, Wu JH; Arch Biochem Biophys 2000;379:237-244. PMID:10898940