Function
RUNX2 is a transcription factor that plays a crucial role in osteoblastic differentiation and skeletal morphogenesis. It is essential for the maturation of osteoblasts and both intramembranous and endochondral ossification. RUNX2 binds to the core site, 5'-PYGPYGGT-3', of various enhancers and promoters, including murine leukemia virus, polyomavirus enhancer, T-cell receptor enhancers, osteocalcin, osteopontin, bone sialoprotein, alpha 1(I) collagen, LCK, IL-3, and GM-CSF promoters. Within osteoblasts, RUNX2 supports transcription activation, synergizing with SPEN/MINT to enhance FGFR2-mediated activation of the osteocalcin FGF-responsive element (OCFRE). Additionally, RUNX2 inhibits KAT6B-dependent transcriptional activation.