STAT5A（signal transducer and activator of transcription 5A），癌症关联基因，基因ID：6776，这个基因编码的蛋白质是转录因子stat家族的一员。在对细胞因子和生长因子的反应中，stat家族成员被受体相关的激酶磷酸化，然后形成homo-或异二聚体，在那里它们作为转录激活因子转移到细胞核。该蛋白被多种细胞配体如il2、il3、il7 gm-csf、促红细胞生成素、血小板生成素和不同的生长激素激活并介导其反应。该蛋白在骨髓瘤和淋巴瘤中的激活与tel/jak2基因融合无关，已被证明是肿瘤发生的必要条件。该基因在小鼠体内可诱导bcl2l1/bcl-x（l）的表达，提示该基因在细胞中具有抗凋亡作用。另外，已经发现该基因的剪接转录变体。[由RefSeq提供，2013年12月]The protein encoded by this gene is a member of the STAT family of transcription factors. In response to cytokines and growth factors， STAT family members are phosphorylated by the receptor associated kinases， and then form homo- or heterodimers that translocate to the cell nucleus where they act as transcription activators. This protein is activated by， and mediates the responses of many cell ligands， such as IL2， IL3， IL7 GM-CSF， erythropoietin， thrombopoietin， and different growth hormones. Activation of this protein in myeloma and lymphoma associated with a TEL/JAK2 gene fu。