DARPP32, phosphorylated (Thr75) (Dopamine and cAMP-regulated Phosphoprotein, Protein phosphatase 1 regulatory subunit 1B, PP1R1B)

DARPP-32, a dopamine (DA) and cAMP-regulated ~32k phosphoprotein, is associated with dopaminoceptive neurons bearing D-1 receptors in the basal ganglia. The protein inhibits protein phosphatase I when it is phosphorylated on Thr34. In contrast, when DARPP-32 is phosphorylated on Thr75 the protein acts as an inhibitor of PKA. Phosphorylation of DARPP is thought to play a critical role in the regulation of dopaminergic neurotransmission. In addition, the activity of DARPP-32 is also thought to play important roles in the actions of alcohol, caffeine and Prozac\n\nApplications: \nSuitable for use in Western Blot and Dot Blot. Other applications not tested.\n\nRecommended Dilution:\nOptimal dilutions to be determined by the researcher.\n\nStorage and Stability:\nMay be stored at 4 degrees C for short-term only. For long-term storage and to avoid repeated freezing and thawing, aliquot Store at -20 degrees C. Aliquots are stable for at least 12 months at -20 degrees C. For maximum recovery of product, centrifuge the original vial after thawing and prior to removing the cap. Further dilutions can be made in assay buffer.

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SPECIFICATIONS

Catalog Number

D1075-02K

Size

100ul

Applications

WB

Hosts

Rabbit

Reactivities

Hum, Mouse, Rat

Form

As reported

P Type

Pab

Purity

Purified by immunoaffinity chromatography.

References

1. Svenningsson, P., Tzavara, E.T., Carruthers, R., Rachleff, I., Wattler, S., Nehls, M., McKinzie, D.L., Fienberg, A.A., Nomikos, G.G.and Greengard, P., "Diverse psychotomimetics act through a common signaling pathway," Science, 302 (2003) 1412 - 1415.\n2. Lindskog, M., Svenningsson, P., Pozzi, L., Kim, Y., Fienberg, A.A., Bibb, J.A.., Fredholm, B.B., Nairn, A.C., Greengard, P. and Fisone, G., "Involvement of DARPP-32 phosphorylation in the stimulant action of caffeine, Nature (London), 418 (2002) 774 - 778.\n3. Maldve, R.E., Zhang, T.A., Ferrani-Kile, K., Schreiber, S.S., Lippmann, M.J., Snyder, G.L., Feinberg, A.A., Leslie, S.W., Gonzales, R.A., and Morrisett, R.A., "DARPP-32 and the regulation of the ethanol sensitivity of NMDA receptors in the nucleus accumbens," Nature Neurosci. 5 (2002) 641 - 648.\n4. Greengard, P., "The neurobiology of slow synaptic transmission," Science 294 (2001) 1024 -1030.\n5. Bibb, J.A., Snyder, G.L., Nishi, A., Yan, Z., Meijer, L., Fienberg, A.A., Tsai, L.H., Kwon, Y.T., Girault, J.A., Czernik, A.J., Huganir, R.L., Hemmings, Jr., H.C., Nairn, A.C., and Greengard, P., "Phosphorylation of DARPP-32 by Cdk5 modulates dopamine signalling in neurons, Nature (London) 402 (1999) 669 - 671.\n6. Fienberg, A.A., Hiroi, N., Mermelstein, P.G., Song, W., Snyder, G.L., Nishi, A., Cheramy, A. O'Callaghan, J.P., Miller, D.B., Cole, D.G., Corbett, R., Haile, C.N., Cooper, D,C., Onn, S.P., Grace, A.A., Ouimet, C.C., White, F.G., Hyman, S.E., Surmeier, D.G., Girault, J., Nestler, E.J., and Greengard, P., "DARPP-32: regulator of the efficacy of dopaminergic neurotransmission," Science 281 (1998) 838 - 842.\n7. Walaas, S.I. and Greengard, P., "DARPP-32, A dopamine- and adenosine 3':5'-monophosphate-regulated phosphoprotein enriched in dopamine-innervated brain regions," J. Neurosci. 4 (1984) 84 -98.\n8. Han, J., Han, L., Tiwari, P., Wen, Z., and Zheng, J. Q. (2007) Spatial targeting of type II protein kinase A to filopodia mediates the regulation of growth cone guidance by cAMP, 176, 101-111.

Additional Info

Specific for the ~34k DARPP-32 phosphorylated at Thr75. Species Crossreactivity: This antibody recognizes human, mouse, and rat forms of the protein. Other species have not been tested.

Alternative Names

DARPP 32, DARPP32, Dopamine- and cAMP-regulated neuronal phosphoprotein