Based on the provided abstracts, osteomodulin (OMD) appears to function primarily in biomineralization processes and osteogenic differentiation. OMD is upregulated in human renal interstitial fibroblasts within Randall's plaques (calcium deposits in renal papillae) and colocalizes with calcium phosphate crystals and calcium vesicles 1. The protein enhances osteogenic-like differentiation of renal interstitial fibroblasts both in vitro and in vivo through a positive feedback loop involving OMD/BMP2/BMPR1A/RUNX2/OMD signaling 1. Mechanistically, OMD induces an osteogenic-like microenvironment in the renal interstitium that contributes to Randall's plaque formation, which serves as niduses for calcium oxalate kidney stones 1. Crystal deposits are significantly reduced in mice with Omd deletion in renal interstitial fibroblasts following nephrocalcinosis induction, demonstrating its functional importance in pathological mineralization 1. While the UniProt annotation suggests a role in osteoblast binding via αVβ3-integrin, this specific function was not supported by the provided abstracts. The available evidence indicates OMD plays a crucial role in pathological biomineralization processes, particularly in kidney stone formation.