RAS guanyl-releasing protein 1 (RASGRP1)

Functions as a calcium- and diacylglycerol (DAG)- regulated nucleotide exchange factor specifically activating Ras through the exchange of bound GDP for GTP (PubMed:15899849, PubMed:23908768). Activates the Erk/MAP kinase cascade (PubMed:15899849).

Regulates T-cell/B-cell growth, homeostasis and differentiation by coupling T-lymphocyte/B- lymphocyte antigen receptors to Ras (PubMed:10807788, PubMed:12839994). Regulates NK cell cytotoxicity and ITAM- dependent cytokine production by activation of Ras-mediated ERK and JNK pathways (PubMed:19933860).