Ras activity is regulated by GAP (GTPase activating proteins) and GEFs (guanine nucleotide exchange factors). Ras-GRF1 (also known as CDC25Mm) is neuronal RasGEF and is regulated by heterotrimeric G proteins and calcium influx . Binding to calmodulin and phosphorylation stimulate Ras-GRF1 activity. Multiple PKA phosphorylation sites on Ras-GRF have been identified. Phosphorylation on the two major sites, Ser54 and Ser822, inhibits Ras-GRF activity. Carbachol (a muscarinic agonist)-induced phosphorylation on Ser916 is essential but not sufficient for maximal Ras-GRF activity.Huibin Yang, J. Biol. Chem., Apr 2003; 278: 13278 - 13285. Huibin Yang, Mol. Biol. Cell, May 2006; 17: 2177 - 2189. Raymond R. Mattingly, J. Biol. Chem., Dec 1999; 274: 37379. Tie-Nian Zhu, J. Biol. Chem., May 2007; 282: 14816 - 14826.
Host
Rabbit
Immunogen
Peptide sequence around phosphorylation site of Serine 916(N-E-G(p)-T P) derived from Human Ras-GRF1.
Raised In
Rabbit
Reactivity
Mouse, Rat
Regulatory
RUO
Relevance
Ras activity is regulated by GAP (GTPase activating proteins) and GEFs (guanine nucleotide exchange factors). Ras-GRF1 (also known as CDC25Mm) is neuronal RasGEF and is regulated by heterotrimeric G proteins and calcium influx . Binding to calmodulin and phosphorylation stimulate Ras-GRF1 activity. Multiple PKA phosphorylation sites on Ras-GRF have been identified. Phosphorylation on the two major sites, Ser54 and Ser822, inhibits Ras-GRF activity. Carbachol (a muscarinic agonist)-induced phosphorylation on Ser916 is essential but not sufficient for maximal Ras-GRF activity.
Huibin Yang, J. Biol. Chem., Apr 2003; 278: 13278 - 13285. Huibin Yang, Mol. Biol. Cell, May 2006; 17: 2177 - 2189. Raymond R. Mattingly, J. Biol. Chem., Dec 1999; 274: 37379. Tie-Nian Zhu, J. Biol. Chem., May 2007; 282: 14816 - 14826.
Species
Homo Sapiens (Human)
Specificity
The antibody detects endogenous levels of Ras-GRF1 only when phosphorylated at serine 916.
Rabbit IgG in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
Form
Rabbit IgG in phosphate buffered saline (without Mg2+ and Ca2+), pH 7.4, 150mM NaCl, 0.02% sodium azide and 50% glycerol.
Format
liquid
Purification
Antibodies were produced by immunizing rabbits with synthetic phosphopeptide and KLH conjugates. Antibodies were purified by affinity-chromatography using epitope-specific phosphopeptide. Non-phospho specific antibodies were removed by chromatogramphy usi
Purity
Antibodies were produced by immunizing rabbits with synthetic phosphopeptide and KLH conjugates. Antibodies were purified by affinity-chromatography using epitope-specific phosphopeptide. Non-phospho specific antibodies were removed by chromatogramphy using non-phosphopeptide.
Storage
Upon receipt, store at -20°C or -80°C. Avoid repeated freeze.