FAP（fibroblast activation protein alpha），癌症关联基因，基因ID：2191，该基因编码的蛋白是丝氨酸蛋白酶家族中的一种全膜明胶酶。在上皮癌的反应性基质成纤维细胞、愈合伤口的肉芽组织、骨和软组织肉瘤的恶性细胞中有选择性表达这种蛋白被认为参与了在发育、组织修复和上皮癌变过程中成纤维细胞生长或上皮-间质相互作用的控制。另外，已经发现该基因编码不同亚型的剪接转录变体[由RefSeq提供，2014年4月]The protein encoded by this gene is a homodimeric integral membrane gelatinase belonging to the serine protease family. It is selectively expressed in reactive stromal fibroblasts of epithelial cancers， granulation tissue of healing wounds， and malignant cells of bone and soft tissue sarcomas. This protein is thought to be involved in the control of fibroblast growth or epithelial-mesenchymal interactions during development， tissue repair， and epithelial carcinogenesis. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq， Apr 2014]。