该基因编码一种钙调素和肌动蛋白结合蛋白，在平滑肌和非肌肉收缩的调节中起重要作用该蛋白的保守结构域具有与钙钙调素、肌动蛋白、原肌球蛋白、肌球蛋白和磷脂的结合活性。该蛋白是肌动蛋白原肌球蛋白激活的肌球蛋白mgatp酶的有效抑制剂，是钙依赖性抑制平滑肌收缩的中介因子该基因的选择性剪接导致编码不同亚型的多个转录变体。[由RefSeq提供，2008年7月]
This gene encodes a calmodulin- and actin-binding protein that plays an essential role in the regulation of smooth muscle and nonmuscle contraction. The conserved domain of this protein possesses the binding activities to Ca(2+)-calmodulin, actin, tropomyosin, myosin, and phospholipids. This protein is a potent inhibitor of the actin-tropomyosin activated myosin MgATPase, and serves as a mediating factor for Ca(2+)-dependent inhibition of smooth muscle contraction. Alternative splicing of this gene results in multiple transcript variants encoding distinct isoforms. [provided by RefSeq, Jul 2008]
