The function of MAP3K11 (mitogen-activated protein kinase kinase kinase 11, ENSG00000173327) is as follows. Activates the JUN N-terminal pathway. Required for serum- stimulated cell proliferation and for mitogen and cytokine activation of MAPK14 (p38), MAPK3 (ERK) and MAPK8 (JNK1) through phosphorylation and activation of MAP2K4/MKK4 and MAP2K7/MKK7. Plays a role in mitogen- stimulated phosphorylation and activation of BRAF, but does not phosphorylate BRAF directly. Influences microtubule organization during the cell cycle. {ECO:0000269|PubMed:12529434, ECO:0000269|PubMed:15258589, ECO:0000269|PubMed:8195146, ECO:0000269|PubMed:9003778}.