This domain, consisting of the distinct N-terminal PRY subdomain followed by the SPRY subdomain, is found at the C terminus of TRIM17, also known as RING finger protein 16 (RNF16) or testis RING finger protein (terf). TRIM17 domain is composed of RING/B-box/coiled-coil core and also known as RBCC protein, expressed almost exclusively in the testis. It exhibits E3 ligase activity, causing protein degradation of ZW10 interacting protein (ZWINT), a known component of the kinetochore complex required for the mitotic spindle checkpoint, and negatively regulates proliferation of breast cancer cells [, , ]. TRIM17 undergoes ubiquitination in COS7 fibroblast-like cells but is inhibited and stabilized by TRIM44 [].
