该基因编码丝氨酸/苏氨酸蛋白激酶，在丝裂原活化蛋白激酶（MAPK）信号传导的上游起作用编码的蛋白质被caspases切割成两条链；n末端片段（mst3/n）转移到细胞核并促进细胞程序性死亡。在x染色体上有一个假基因。选择性剪接导致多个转录变异。
This gene encodes a serine/threonine protein kinase that functions upstream of mitogen-activated protein kinase (MAPK) signaling. The encoded protein is cleaved into two chains by caspases; the N-terminal fragment (MST3/N) translocates to the nucleus and promotes programmed cells death. There is a pseudogene for this gene on chromosome X. Alternative splicing results in multiple transcript variants.