Cell Signaling Technology

Product Pathways - Neuroscience

Phospho-CREB (Ser133) Antibody #9191

Applications Reactivity Sensitivity MW (kDa) Source
W IP H M R Endogenous 43 Rabbit

Applications Key:  W=Western Blotting  IP=Immunoprecipitation
Reactivity Key:  H=Human  M=Mouse  R=Rat
Species cross-reactivity is determined by western blot. Species enclosed in parentheses are predicted to react based on 100% sequence homology.

Protocols

Specificity / Sensitivity

Phospho-CREB (Ser133) Antibody detects endogenous levels of CREB only when phosphorylated at serine 133. This antibody also detects the phosphorylated form of the CREB-related protein ATF-1, and has been shown to react weakly with overexpressed levels of pyruvate dehydrogenase.

Source / Purification

Polyclonal antibodies are produced by immunizing animals with a synthetic phosphopeptide corresponding to residues surrounding Ser133 of human CREB. Antibodies are purified by protein A and peptide affinity chromatography.

Western Blotting

Western Blotting

Western blot analysis of extracts from SK-N-MC cells, untreated or forskolin treated, using Phospho-CREB (Ser133) Antibody (upper) or CREB (48M2) Rabbit mAb #9197 (lower).

Background

CREB is a bZIP transcription factor that activates target genes through cAMP response elements. CREB is able to mediate signals from numerous physiological stimuli, resulting in regulation of a broad array of cellular responses. While CREB is expressed in numerous tissues, it plays a large regulatory role in the nervous system. CREB is believed to play a key role in promoting neuronal survival, precursor proliferation, neurite outgrowth, and neuronal differentiation in certain neuronal populations (1-3). Additionally, CREB signaling is involved in learning and memory in several organisms (4-6). CREB is able to selectively activate numerous downstream genes through interactions with different dimerization partners. CREB is activated by phosphorylation at Ser133 by various signaling pathways including Erk, Ca2+, and stress signaling. Some of the kinases involved in phosphorylating CREB at Ser133 are p90RSK, MSK, CaMKIV, and MAPKAPK-2 (7-9).

  1. Lonze, B.E. et al. (2002) Neuron 34, 371-85.
  2. Lee, M.M. et al. (1999) J Neurosci Res 55, 702-12.
  3. Redmond, L. et al. (2002) Neuron 34, 999-1010.
  4. Dash, P.K. et al. (1990) Nature 345, 718-21.
  5. Yin, J.C. et al. (1994) Cell 79, 49-58.
  6. Guzowski, J.F. and McGaugh, J.L. (1997) Proc Natl Acad Sci USA 94, 2693-8.
  7. Xing, J. et al. (1998) Mol Cell Biol 18, 1946-55.
  8. Ribar, T.J. et al. (2000) J Neurosci 20, RC107.
  9. Tan, Y. et al. (1996) EMBO J 15, 4629-42.

Application References

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For Research Use Only. Not For Use In Diagnostic Procedures.

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