Anti-RANGAP1 Antibody Picoband® Fluoro488 Conjugated

Ran GTPase-activating protein 1 is an enzyme that in humans is encoded by the RANGAP1 gene. This gene encodes a protein that associates with the nuclear pore complex and participates in the regulation of nuclear transport. The encoded protein interacts with Ras-related nuclear protein 1 (RAN) and regulates guanosine triphosphate (GTP) -binding and exchange. Alternative splicing results in multiple transcript variants.

Part of the TCR-CD3 complex present on T-lymphocyte cell surface that plays an essential role in adaptive immune response. When antigen presenting cells (APCs) activate T-cell receptor (TCR), TCR-mediated signals are transmitted across the cell membrane by the CD3 chains CD3D, CD3E, CD3G and CD3Z. All CD3 chains contain immunoreceptor tyrosine-based activation motifs (ITAMs) in their cytoplasmic domain. Upon TCR engagement, these motifs become phosphorylated by Src family protein tyrosine kinases LCK and FYN, resulting in the activation of downstream signaling pathways. In addition of this role of signal transduction in T-cell activation, CD3E plays an essential role in correct T-cell development (PubMed:19956738, PubMed:24899501) . Participates also in internalization and cell surface down-regulation of TCR-CD3 complexes via endocytosis sequences present in CD3E cytosolic region.

1. Bernier-Villamor, V., Sampson, D. A., Matunis, M. J., Lima, C. D. Structural basis for E2-mediated SUMO conjugation revealed by a complex between ubiquitin-conjugating enzyme Ubc9 and RanGAP1. Cell 108: 345-356, 2002. 2. Bischoff, F. R., Klebe, C., Kretschmer, J., Wittinghofer, A., Ponstingl, H. RanGAP1 induces GTPase activity of nuclear Ras-related Ran. Proc. Nat. Acad. Sci. 91: 2587-2591, 1994. 3. Bischoff, F. R., Krebber, H., Kempf, T., Hermes, I., Ponstingl, H. Human RanGTPase-activating protein RanGAP1 is a homologue of yeast Rna1p involved in mRNA processing and transport. Proc. Nat. Acad. Sci. 92: 1749-1753, 1995.

Alpha-beta T cell receptor complex; external side of plasma membrane; immunological synapse; cell body; cell-cell junction; dendritic spine; integral component of membrane