Synthetic phosphopeptide corresponding to residues surrounding Ser1756 of rat IP3 receptor.
Inositol 1,4,5-triphosphate receptor, also known as IP3R or InsP3R, is a member of the intracellular calcium release channel family, and is located in the endo- plasmic reticulum. It functions as a Ca2+ release channel for intracellular stores of calcium ions. There are three types of IP3 receptors (IP3 receptor 1, 2 and 3) that require the second messenger inositol 1,4,5-triphosphate (IP3) for activation (1). Four individual receptor subunits, resulting in homo- or hetero-oligomerization of the receptor isoform, form a functional channel (2). Phosphorylation of IP3R1 at Ser1756 by cyclic-AMP-dependent protein kinase A (PKA) regulates the sensitivity of IP3R1 to IP3 and may thus be a mode of regulation for Ca2+ release (3,4). IP3R1 mediated calcium release appears to have an effect on the induction of long term depression (LTD) in Purkinje cells (5). Applications: Suitable for use in Western Blot. Other applications not tested. Recommended Dilution: Western Blot: 1:1000, incubate membrane with diluted antibody in TBS, 5% BSA, 0.1% Tween-20 at 4C with gentle shaking, overnight. Optimal dilutions to be determined by the researcher. Storage and Stability: May be stored at 4C for short-term only. Aliquot to avoid repeated freezing and thawing. Store at -20C. Aliquots are stable for 12 months after receipt. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap.
