MAP3K1（mitogen-activated protein kinase kinase kinase 1），癌症关联基因，基因ID：4214，该基因编码的蛋白是丝氨酸/苏氨酸激酶，是一些信号转导通路的一部分，包括erk和jnk激酶途径以及nf-kappa-b途径。编码的蛋白质被自磷酸化激活，需要镁作为其他蛋白质磷酸化的辅助因子。该蛋白具有e3连接酶活性，由植物同源结构域（phd）赋予其n-末端，磷酸激酶活性由激酶结构域赋予其c-末端。[由RefSeq提供，2012年3月]The protein encoded by this gene is a serine/threonine kinase and is part of some signal transduction cascades， including the ERK and JNK kinase pathways as well as the NF-kappa-B pathway. The encoded protein is activated by autophosphorylation and requires magnesium as a cofactor in phosphorylating other proteins. This protein has E3 ligase activity conferred by a plant homeodomain (PHD) in its N-terminus and phospho-kinase activity conferred by a kinase domain in its C-terminus. [provided by RefSeq， Mar 2012]。