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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Activating transcription factor-1 is a specific antagonist of the cyclic adenosine 3'.5'-monophosphate (cAMP) response element-binding protein-1-mediated response to cAMP.

We have investigated the molecular basis of the variability of the somatostatin cAMP response element (CRE) function in different cell lines. All cells tested contain detectable levels of the CRE-binding protein CREB-1, which mediates transactivation in response to the cAMP-dependent protein kinase (protein kinase-A), in forms that can bind to a somatostatin CRE. Although both responsive and nonresponsive cells contain CREB-1 in heterodimers with activating transcription factor-1 (ATF-1), only cells that allow a cAMP response have a significant proportion of CREB-1 in a homodimeric form. Transfection experiments demonstrate that ATF-1 is capable of antagonizing CREB-1-dependent activation, suggesting that the ability of CREB-1 to mediate a cAMP response is down-regulated by heterodimer formation with ATF-1.[1]

References

  1. Activating transcription factor-1 is a specific antagonist of the cyclic adenosine 3'.5'-monophosphate (cAMP) response element-binding protein-1-mediated response to cAMP. Ellis, M.J., Lindon, A.C., Flint, K.J., Jones, N.C., Goodbourn, S. Mol. Endocrinol. (1995) [Pubmed]
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