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Technical Data Sheet

TP5681

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TRPM7 (Ser-1569), phospho-specific
Rabbit Polyclonal
Price
Size
Species Reactivity
MW

$295
100 μl
Hu, Rt, Ms
220 kDa

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Enlarge

Western blot image of rat PC12 cells (lanes 1-4). The blot was treated with lambda phosphatase to dephosphorylate TRPM7 (lanes 2 & 4). The blot was probed with rabbit polyclonals anti-TRPM7 (Extracellular region) TP5651 (lanes 1 & 2) or anti-TRPM7 (Ser-1569), phospho-specific (lanes 3 & 4).

Application
Dilution


ELISA
1:2000


WB
1:1000



End user should determine optimal dilution for their particular applications and experiments.Western blot membranes were incubated with diluted antibody in 5% non-fat milk, PBS, 0.04% Tween20 for 1hour at room temperature.
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Background
The transient receptor potential melastatin (TRPM) subfamily of cation-permeable TRP channels is ubiquitously expressed in mammalian tissues. This family includes TRPM1-8. In addition to acting as a calcium-permeant channel, TRPM6 and TRPM7 possess an inherent serine/threonine kinase activity. TRPM7 specifically is involved with cellular magnesium homeostasis and neurotransmitter release. Due to the magnesium inhibition, TRPM7’s ion channel activity is very low. TRPM7 has been implicated in cell proliferation and migration during cancer progression, and its expression levels correlate with prognosis in breast cancer. TRPM7 kinase activation leads to massive autophosphorylation of the C-terminal region, including phosphorylation of Ser-1493, Ser-1513, and Ser-1569. Both Ser-1513 and Ser-1569 phosphorylation is required for kinase activity, and phosphorylation of Ser-1513 may inhibit Caspase-mediated cleavage of the C-terminal tail. Thus, TRPM7 is a multifunctional transmembrane protein with roles in cell signaling, proliferation, migration, and death.


Background References
Masayuki, M. et al. (2005) J of Bio Chem 280(21): 20793
Clark, K. et al. (2008) PLoS ONE 3(3): e1876
Desai, BN. et al. (2012) Dev. Cell. 22(6): 1149
Park, HS, et al. (2014) Korean J Phys Pharm. 18(1):15-23.
Immunogen
Phospho-TRPM7 (Ser-1569) synthetic peptide (coupled to carrier) corresponding to amino acids surrounding Ser-1569 in human TRPM7. This site is well conserved in rat and mouse TRPM7, and is conserved in TRPM6 (Thr-1724) however the site is threonine instead of serine. This site has no homology to other TRPM family members.
Buffer and Storage
Rabbit polyclonal, affinity-purified antibody is supplied in 100µl phosphate-buffered saline, 50% glycerol, 1 mg/ml BSA, and 0.05% sodium azide. Store at –20°C. Stable for 1 year.
Specificity
The antibody was cross-adsorbed to unphosphorylated TRPM7 (Ser-1569) then affinity purified using phospho-TRPM7 (Ser-1569) peptide. This antibody detects a 220 kDa* protein on SDS-PAGE immunoblots of human MDA-MB-231 stimulated with calyculin A and rat PC12 cells, as well as detects a 70 kDa autophosphorylated recombinant kinase domain of human TRPM7. These reactivities are not observed after lambda phosphatase treatment to dephosphorylate TRPM7.

*All molecular weights (MW) are confirmed by comparison to Bio-Rad Rainbow Markers and to western blot mobilities of known proteins with similar MW.
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