Description
Product Usage Information
Western Blotting: 1:1000
Storage
Supplied in 10 mM sodium HEPES (pH 7.5), 150 mM NaCl, 100 µg/ml BSA and 50% glycerol. Store at -20°C. Do not aliquot the antibody.
Protocol
Available protocols: Western Blotting
Specificity / Sensitivity
G-alpha(i) Antibody detects endogenous levels of total Gα(i) protein.
Species Reactivity: Human, Mouse, Rat
Source / Purification
Polyclonal antibodies are produced by immunizing animals with a synthetic peptide corresponding to residues surrounding Arg100 of human Gα(i). Antibodies are purified by protein A and peptide affinity chromatography.
Background
Heterotrimeric guanine nucleotide-binding proteins (G proteins) consist of α, β and γ subunits and mediate the effects of hormones, neurotransmitters, chemokines, and sensory stimuli. To date, over 20 known Gα subunits have been classified into four families, Gα(s), Gα(i/o), Gα(q) and Gα(12), based on structural and functional similarities (1,2). Phosphorylation of Tyr356 of Gα(q)/Gα(11) is essential for activation of the G protein, since phenylalanine substitution for Tyr356 changes the interaction of Gα with receptors and abolishes ligand-induced IP formation (3). Gα(i) causes inhibition of adenylate cyclase, leading to a decrease in cellular levels of cAMP. Pertussis toxin catalyzes ADP-ribosylation of Gα(i), which inactivates the Gα(i) protein and attenuates inhibition of adenylate cyclase (4).
Alternate Names
Adenylate cyclase-inhibiting G alpha protein; G protein subunit alpha i1; G-alpha i1; Gi; Gi1 protein alpha subunit; GNAI1; guanine nucleotide binding protein (G protein), alpha inhibiting activity polypeptide 1; Guanine nucleotide-binding protein G(i) subunit alpha-1
