The function of ENSG00000137764 (MAP2K5, mitogen-activated protein kinase kinase 5) is as follows. Acts as a scaffold for the formation of a ternary MAP3K2/MAP3K3-MAP3K5-MAPK7 signaling complex. Activation of this pathway appears to play a critical role in protecting cells from stress-induced apoptosis, neuronal survival and cardiac development and angiogenesis. As part of the MAPK/ERK signaling pathway, acts as a negative regulator of apoptosis in cardiomyocytes via promotion of STUB1/CHIP-mediated ubiquitination and degradation of ICER-type isoforms of CREM (By similarity). {ECO:0000250|UniProtKB:Q62862, ECO:0000269|PubMed:7759517, ECO:0000269|PubMed:9384584}.