SPARC related modular calcium binding 1
The SMOC1 gene provides instructions for making a protein called secreted modular calcium-binding protein 1 (SMOC-1). This protein is found in basement membranes, which are thin, sheet-like structures that support cells in many tissues and help anchor cells to one another during embryonic development. The SMOC-1 protein attaches (binds) to many different proteins and is thought to regulate molecules called growth factors that stimulate the growth and development of tissues throughout the body. These growth factors play important roles in skeletal formation, normal shaping (patterning) of the limbs, as well as eye formation and development. The SMOC-1 protein also likely promotes the maturation (differentiation) of cells that build bones, called osteoblasts.
At least 12 mutations in the SMOC1 gene have been found to cause ophthalmo-acromelic syndrome, a condition that results in malformations of the eyes, hands, and feet. Most of these mutations likely result in a nonfunctional SMOC-1 protein. The loss of SMOC-1 could disrupt growth factor signaling, which would impair the normal development of the skeleton, limbs, and eyes. These changes likely underlie the signs and symptoms of ophthalmo-acromelic syndrome.
- secreted modular calcium-binding protein 1
- SPARC-related modular calcium-binding protein 1