钙束蛋白属于钙结合蛋白家族，是中心体的结构成分从藻类到人类的高度保守性及其与中心体的联系表明，caltractin在微管组织中心的结构和功能中起着基础性作用，这可能是中心体正确复制和分离所必需的。[由RefSeq提供，2008年7月]
Caltractin belongs to a family of calcium-binding proteins and is a structural component of the centrosome. The high level of conservation from algae to humans and its association with the centrosome suggested that caltractin plays a fundamental role in the structure and function of the microtubule-organizing center, possibly required for the proper duplication and segregation of the centrosome. [provided by RefSeq, Jul 2008]