FEATURES

FAMILY

DESCRIPTION

Also known as SH3R1_BOVIN, SH3RF1, POSH, POSH1. Has E3 ubiquitin-protein ligase activity. In the absence of an external substrate, it can catalyze self-ubiquitination. Stimulates ubiquitination of potassium channel KCNJ1, enhancing it's dynamin-dependent and clathrin-independent endocytosis. Acts as a scaffold protein that coordinates with MAPK8IP1/JIP1 in organizing different components of the JNK pathway, including RAC1 or RAC2, MAP3K11/MLK3 or MAP3K7/TAK1, MAP2K7/MKK7, MAPK8/JNK1 and/or MAPK9/JNK2 into a functional multiprotein complex to ensure the effective activation of the JNK signaling pathway. Regulates the differentiation of CD4(+) and CD8(+) T-cells and promotes T-helper 1 (Th1) cell differentiation. Regulates the activation of MAPK8/JNK1 and MAPK9/JNK2 in CD4(+) T-cells and the activation of MAPK8/JNK1 in CD8(+) T-cells. Plays a crucial role in the migration of neocortical neurons in the developing brain. Controls proper cortical neuronal migration and the formation of proximal cytoplasmic dilation in the leading process (PCDLP) in migratory neocortical neurons by regulating the proper localization of activated RAC1 and F-actin assembly. Interacts with RAC1; in a GTP-dependent manner. Interacts with MAP3K10/MLK2 and MAP3K11/MLK3. Interacts with MAPK8IP; this interaction leads to the PJAC complex (POSH-JIP or SH3RF1/MAPK8IP apoptotic complex) with a 1:1 ratio. Interacts with SIAH1. Interacts with HERP1. Probably part of a signaling complex that may contain SH3RF1, MAPK8IP, DLK1, MAP2K4/MKK4, MAP2K7/MKK7, MAPK8/JNK1, MAPK9/JNK2, AKT1 and AKT2. Found in a complex with RAC2, MAP3K7/TAK1, MAP2K7/MKK7, MAPK8IP1/JIP1, MAPK8/JNK1 and MAPK9/JNK2. Found in a complex with RAC1, MAP3K11/MLK3, MAP2K7/MKK7, MAPK8IP1/JIP1 and MAPK8/JNK1. Interacts with SH3RF2.

EXTERNAL LINKS

SH3RF1

E3 ubiquitin-protein ligase SH3RF1

SH3RF1

Molecular Synopsis