Sarcosynapsin (SRYP)

KBTBD5, Contains 1 BACK (BTB/Kelch associated) domain. Kelch proteins are a widespread group of proteins that contain multiple Kelch motifs. The kelch domain generally occurs as a set of five to seven kelch repeats that form a β-propeller tertiary structure. Kelch-repeat β-propellers are generally involved in protein-protein interactions, though the large diversity of domain architectures and limited sequence identity between kelch motifs make characterisation of the kelch superfamily difficult. The N-terminus of several Kelch proteins contain other protein domains, including Discoidin, F-box, and Broad-complex, Tramtrack, Bric-a-Brac/Poxvirus and Zincfinger (BTB/POZ) domains. Kelch proteins may also have only a β-propeller architecture only. The BTB domain of kelch proteins (if present) allows the formation of homo- or heterodimers that mediate protein-protein interactions.