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Journal ArticleDOI

Transcriptional regulation by the phosphorylation-dependent factor CREB

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TLDR
The transcription factor CREB functions in glucose homeostasis, growth-factor-dependent cell survival, and has been implicated in learning and memory, and how is specificity achieved in these signalling pathways?
Abstract
The transcription factor CREB -- for 'cyclic AMP response element-binding protein' -- functions in glucose homeostasis, growth-factor-dependent cell survival, and has been implicated in learning and memory. CREB is phosphorylated in response to various signals, but how is specificity achieved in these signalling pathways?

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Citations
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Cyclin-Dependent Kinase 3–Mediated Activating Transcription Factor 1 Phosphorylation Enhances Cell Transformation

TL;DR: It is reported that the protein expression level of cdk3 is higher in human cancer cell lines and human glioblastoma tissue compared with normal brain tissue and results indicated that siRNA directed againstCDk3 (si-cdk3) suppresses ATF1 activity, resulting in inhibition of proliferation and growth of humangliobenteroma T98G cells in soft agar.
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Hereditary Nephrogenic Diabetes Insipidus: Pathophysiology and Possible Treatment. An Update

TL;DR: An updated overview of the genetic defects causing nephrogenic diabetes insipidus, the most recent strategies under investigation for rescuing the activity of mutated AVPR2 or AQP2, or for bypassing defective AV PR2 signaling and restoring AQP1 plasma membrane expression are provided.
Journal ArticleDOI

Deregulated protein kinase A signaling and myospryn expression in muscular dystrophy.

TL;DR: It is reported that dystrophic muscle exhibits reduced PKA activity resulting, in part, from severely mislocalized myospryn and the type II regulatory subunit (RIIα) of PKA and it is shown that myosp Kathryn and dystrophin coimmunoprecipitate in native muscle extracts and directly interact in vitro.
Journal ArticleDOI

Oestrogen upregulates L‐type Ca2+ channels via oestrogen‐receptor‐α by a regional genomic mechanism in female rabbit hearts

TL;DR: It is shown that physiological concentrations of oestrogen increase the calciumCurrent only in cells from the base of the heart, by increasing messenger RNA and proteins levels that encode for the calcium current.
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Purinergic receptors modulate MAP kinases and transcription factors that control microglial inflammatory gene expression.

TL;DR: Data presented here indicate that ATP may be an endogenous inhibitor or neuroprotective molecule decreasing the inflammatory capacity of microglia.
References
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Journal ArticleDOI

Cyclic AMP stimulates somatostatin gene transcription by phosphorylation of CREB at serine 133

TL;DR: Results suggest that phosphorylation of CREB may stimulate transcription by a mechanism other than by simply providing negative charge, as CREB mutants containing acidic residues in place of the Ser-133 phosphoacceptor were also transcriptionally inactive.
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Phosphorylated CREB binds specifically to the nuclear protein CBP

TL;DR: It is proposed that CBP may participate in cAMP-regulated gene expression by interacting with the activated phosphorylated form of CREB, which is activated as a result of phosphorylation by protein kinase A7.
Journal ArticleDOI

Cell survival promoted by the Ras-MAPK signaling pathway by transcription-dependent and -independent mechanisms.

TL;DR: The findings suggest that the MAPK signaling pathway promotes cell survival by a dual mechanism comprising the posttranslational modification and inactivation of a component of the cell death machinery and the increased transcription of pro-survival genes.
Journal ArticleDOI

Deficient long-term memory in mice with a targeted mutation of the cAMP-responsive element-binding protein

TL;DR: Consistent with models claiming a role for long-term potentiation (LTP) in memory, LTP in hippocampal slices from CREB mutants decayed to baseline 90 min after tetanic stimulation, however, paired-pulse facilitation and posttetanic potentiation are normal.
Journal ArticleDOI

Nuclear protein CBP is a coactivator for the transcription factor CREB

TL;DR: Fluorescence anisotropy measurements are used to define the equi-librium binding parameters of the phosphoCREB:CBP interaction and report here that CBP can activate transcription through a region in its carboxy terminus.
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