OLFM4 is a 510 amino acid extracellular matrix glycoprotein belonging to the olfactomedin-related protein family and found to be selectively expressed in inflammed colonic epithelium. It has one signal peptide, six N-linked glycosylation motif and forms disulfide-bonded multimers. OLFM4 a transcription factor may have a matrix-related function in differentiation. Constitutively expressed OLFM4 in cancer cells binds to the potent apoptosis inducer GRIM-19 and has a novel antiapoptotic action and hence might serve as a diagnostic marker for human cancers. Reports suggest that OLFM4 promotes proliferation of PANC-1 cells by favoring transition from the S to G2/M phase. Potential interaction of OLFM4 with endogenous cell surface lectins and cadherins may mediate cell adhesion.
Antiapoptotic protein GW112; G-CSF-stimulated clone 1 protein; hGC-1; hOLfD; Olfactomedin-4; OLM4