RABGEF1, a guanine nucleotide exchange factor for Rab5 GTPase, can negatively regulate mast cell activation in vitro. In addition, RabGEF1-deficient mice develop morbidity and severe skin inflammation associated with marked increases in skin mast cell numbers (Tam et al., Nat Immunol, 5(8):844-52, 2...
ORGANISM(S): Mus musculus