[ST5 protein contains a C-terminal region that shares similarity with the Rab 3 family of small GTP binding proteins. This protein preferentially binds to the SH3 domain of c-Abl kinase, and acts as a regulator of MAPK1/ERK2 kinase, which may contribute to its ability to reduce the tumorigenic phenotype in cells. (from LocusLink) ( NCI )] (UMLS (NCI) C0753627) P126; P70; P82; ST5; ST5 Protein; Suppression of Tumorigenicity 5 =Amino Acid, Peptide, or Protein; Biologically Active Substance ;