RAC1_HUMAN

Source: hRBCD ; ID: IPI00010271
PM19886704
PM23856902
BSc_CH
PM22954596
Marked as 'Membrane associated protein'
Confidence: high (present in two of the MS resources) Search PubMed for
(RBC AND this entry)
Gene names: RAC1 , TC25 , MIG5
Protein names and data: RAC1_HUMAN , Ras-related C3 botulinum toxin substrate 1 , Cell migration-inducing gene 5 protein; Ras-like protein TC25; p21-Rac1; Flags: Precursor Lenght: 192 a.a.
Mass: 21450 Da
fasta formatted sequence
Function: Plasma membrane-associated small GTPase which cycles between active GTP-bound and inactive GDP-bound states. In its active state, binds to a variety of effector proteins to regulate cellular responses such as secretory processes, phagocytosis of apoptotic cells, epithelial cell polarization and growth-factor induced formation of membrane ruffles. Rac1 p21/rho GDI heterodimer is the active component of the cytosolic factor sigma 1, which is involved in stimulation of the NADPH oxidase activity in macrophages. Essential for the SPATA13-mediated regulation of cell migration and adhesion assembly and disassembly. Stimulates PKN2 kinase activity. In concert with RAB7A, plays a role in regulating the formation of RBs (ruffled borders) in osteoclasts. In glioma cells, promotes cell migration and invasion. In podocytes, promotes nuclear shuttling of NR3C2; this modulation is required for a proper kidney functioning. Required for atypical chemokine receptor ACKR2-induced LIMK1-PAK1-dependent phosphorylation of cofilin (CFL1) and for up-regulation of ACKR2 from endosomal compartment to cell membrane, increasing its efficiency in chemokine uptake and degradation. Isoform B has an accelerated GEF-independent GDP/GTP exchange and an impaired GTP hydrolysis, which is restored partially by GTPase-activating proteins. It is able to bind to the GTPase-binding domain of PAK but not full-length PAK in a GTP- dependent manner, suggesting that the insertion does not completely abolish effector interaction.
Cellular location: Cell membrane; Lipid-anchor; Cytoplasmic side (By similarity). Melanosome. Cytoplasm (By similarity). Note=Inner surface of plasma membrane possibly with attachment requiring prenylation of the C-terminal cysteine (By similarity). Identified by mass spectrometry in melanosome fractions from stage I to stage IV. Found in the ruffled border (a late endosomal-like compartment in the plasma membrane) of bone-resorbing osteoclasts (By similarity).
Tissue specificity: Isoform B is predominantly identified in skin and epithelial tissues from the intestinal tract. Its expression is elevated in colorectal tumors at various stages of neoplastic progression, as compared to their respective adjacent tissues.

Genetic variants

Database cross-references

UniProt: P63000
Ensembl: ENST00000348035
Ensembl: ENST00000356142
MIM: 602048
neXtProt: NX_P63000
Antibodypedia: P63000 (may not find the protein thus also not any antibody)
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