BSPRY, a novel protein of the Ro-Ret family

Utilizing the yeast two-hybrid system we have identified a novel protein of the Ro-Ret family that was termed BSPRY. This protein is composed of a B-box, an alpha-helical coiled coil and a SPRY domain. BSPRY from human beings shares 80% sequence identity with the homologous protein from mice. The gene for BSPRY resides on human chromosome 9 and is specifically expressed in testis. It comprises six exons and five introns and possesses a GC rich promoter forming a typical CpG island. The function of BSPRY is not known, but several related proteins of the RBCC family have been implicated in cell transformation.