MST1（macrophage stimulating 1），癌症关联基因，基因ID：4485，该基因编码的蛋白质包含四个kringle结构域和一个丝氨酸蛋白酶结构域，与在肝生长因子中发现的类似尽管存在丝氨酸蛋白酶结构域，编码的蛋白质可能没有任何蛋白水解活性。这种蛋白的受体是RON酪氨酸激酶，激活后可刺激纤毛上皮肺细胞的纤毛运动这种蛋白质被分泌和切割形成一个α链和一个由二硫键连接的β链。[由RefSeq提供，2010年1月]The protein encoded by this gene contains four kringle domains and a serine protease domain， similar to that found in hepatic growth factor. Despite the presence of the serine protease domain， the encoded protein may not have any proteolytic activity. The receptor for this protein is RON tyrosine kinase， which upon activation stimulates ciliary motility of ciliated epithelial lung cells. This protein is secreted and cleaved to form an alpha chain and a beta chain bridged by disulfide bonds. [provided by RefSeq， Jan 2010]。