SMOC2 is a calcium-binding protein that promotes matrix assembly and cell adhesiveness, functioning primarily in extracellular matrix organization and angiogenesis. Mechanistically, SMOC2 stimulates endothelial cell proliferation and migration while positively regulating fibroblast growth factor receptor and vascular endothelial growth factor signaling pathways 1. The protein binds heparin and extracellular matrix components, supporting vascular wound healing and angiogenic processes [GO annotations]. In disease contexts, SMOC2 plays multifaceted roles: it is upregulated in dormant colorectal cancer stem cells and correlates with poor prognosis 2, functions as a key mediator of cancer-stem-cell phenotypes in KRAS-mutant colorectal cancer 3, and marks senescent fibroblasts that create tumor-permissive niches in aged bladder tissue 4. SMOC2 serves as an M2 macrophage-related prognostic marker in prostate cancer 5 and is upregulated in cerebrospinal fluid in Alzheimer's disease, suggesting involvement in neuroinflammatory processes 6. Additionally, SMOC2 is a marker of intestinal stem cell renewal requiring fatty acid oxidation 7 and shows depot-specific expression in adipose tissue correlating with cardiometabolic health 8. SMOC2 is associated with dentin dysplasia 1, indicating developmental roles in mineralized tissue formation.