JLP Antibody – Rabbit Polyclonal

This gene encodes a member of the cancer testis antigen gene family. The encoded protein functions as a scaffold protein that structurally organizes mitogen-activated protein kinases and mediates c-Jun-terminal kinase signaling. This protein also binds to kinesin-1 and may be involved in microtubule-based membrane transport. This protein may play a role in tumor growth and development. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Oct 2011]

JIP4: The JNK-interacting protein (JIP) group of scaffold proteins selectively mediates JNK signaling by aggregating specific components of the MAPK cascade to form a functional JNK signaling module. Isoform 5 may play a role in spermatozoa-egg- interaction. Homooligomer. Interacts with MAX, MAPK8, MAPK9, MAPK10, MAPK14, MAP3K3, MYC, KNS2 and MAP2K4. Interaction with KNS2 is important in the formation of ternary complex with MAPK8. Interacts with NFKB1. Isoform 3 is increased in systemic sclerosis fibroblasts. Isoform 5 is expressed only in testis on the round spermatids of stage I, II and II. Isoform 5 is absent in spermatogonia and spermatocyte. Isoform 3 is expressed in testis. Isoform 4 is expressed in testis and in acute myeloid leukemia (AML) patients. Belongs to the JIP scaffold family. 6 isoforms of the human protein are produced by alternative splicing.

Protein type: Adaptor/scaffold; Cancer Testis Antigen (CTA)

Chromosomal Location of Human Ortholog: 17q21.33

Cellular Component: perinuclear region of cytoplasm; cytoplasm; integral to membrane; acrosome; cytosol

Molecular Function: JUN kinase binding; MAP-kinase scaffold activity; protein binding; receptor signaling complex scaffold activity; mitogen-activated protein kinase p38 binding; kinesin binding

Biological Process: muscle cell differentiation; striated muscle cell differentiation; positive regulation of muscle cell differentiation; spermatogenesis; positive regulation of neuron differentiation; retrograde transport, endosome to Golgi; activation of JNK activity; protein homooligomerization; positive regulation of cell migration