Anti-RASA1 Antibody Picoband®

RASA1, also known as RAS p21 protein activator 1, is a 120-kDacytosolic human protein. The protein encoded by this gene is located in the cytoplasm and is part of the GAP1 family of GTPase-activating proteins. The gene product stimulates the GTPase activity of normal RAS p21 but not its oncogenic counterpart. Acting as a suppressor of RAS function, the protein enhances the weak intrinsic GTPase activity of RAS proteins resulting in the inactive GDP-bound form of RAS, thereby allowing control of cellular proliferation and differentiation. Mutations leading to changes in the binding sites of either protein are associated with basal cell carcinomas. Mutations also have been associated with hereditary capillary malformations (CM) with or without arteriovenous malformations (AVM) and Parkes Weber syndrome. Alternative splicing results in two isoforms where the shorter isoform, lacking the N-terminal hydrophobic region but retaining the same activity, appears to be abundantly expressed in placental but not adult tissues.

In placental villi, detected only in the trophoblast layer (cytotrophoblast and syncytiotrophoblast) . Not detected in stromal, endothelial or Hofbauer cells (at protein level) . .

Inhibitory regulator of the Ras-cyclic AMP pathway. Stimulates the GTPase of normal but not oncogenic Ras p21; this stimulation may be further increased in the presence of NCK1. .

1. Entrez Gene: RASA1 RAS p21 protein activator (GTPase activating protein) 1. 2. Chow A, Gawler D (October 1999) . Mapping the site of interaction between annexin VI and the p120GAP C2 domain. FEBS Lett. 460 (1) : 166–72.

Store at -20°C for one year from date of receipt. After reconstitution, at 4°C for one month. It can also be aliquotted and stored frozen at -20°C for six months. Avoid repeated freeze-thaw cycles.