PRY/SPRY domain of tripartite motif-binding protein 1 (TRIM1) or MID2
This domain, consisting of the distinct N-terminal PRY subdomain followed by the SPRY subdomain, is found at the C-terminus of TRIM1 (also known as MID2 or midline 2). MID2 and its close homolog, TRIM18 (also known as MID1), both contain a B30.2-like domain at their C-terminus and a single fibronectin type III (FN3) motif between it and their N-terminal RBCC domain. MID2 and MID1 coiled-coil motifs mediate both homo- and heterodimerization, a prerequisite for association of the rapamycin-sensitive PP2A regulatory subunit Alpha 4 with microtubules. Mutations in MID1 have shown to cause Opitz syndrome, a disorder causing congenital anomalies such as cleft lip and palate as well as heart defects.
Jiyao W et al.(2023). "The conserved domain database in 2023.",