Abstract
Recruitment of the coactivator CBP by signal-regulated transcription factors and stimulation of CBP activity are key regulatory events in the induction of gene transcription following Ca2+ flux through ligand- and/or voltage-gated ion channels in hippocampal neurons. The mode of Ca2+ entry (L-type Ca2+ channels versus NMDA receptors) differentially controls the CBP recruitment step to CREB, providing a molecular basis for the observed Ca2+ channel type-dependent differences in gene expression. In contrast, activation of CBP is triggered irrespective of the route of Ca2+ entry, as is activation of c-Jun, that recruits CBP independently of phosphorylation at major regulatory c-Jun phosphorylation sites, serines 63 and 73. This control of CBP recruitment and activation is likely relevant to other CBP-interacting transcription factors and represents a general mechanism through which Ca2+ signals associated with electrical activity may regulate the expression of many genes.
Original language | English |
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Pages (from-to) | 789-98 |
Number of pages | 10 |
Journal | Neuron |
Volume | 22 |
Issue number | 4 |
Publication status | Published - 1999 |
Keywords
- CREB-Binding Protein
- Calcium
- Calcium Channels
- Cells, Cultured
- Gene Expression Regulation
- Hippocampus
- Humans
- Membrane Potentials
- Nerve Tissue Proteins
- Neurons
- Nuclear Proteins
- Phosphorylation
- Proto-Oncogene Proteins c-fos
- Receptors, N-Methyl-D-Aspartate
- Recruitment, Neurophysiological
- Trans-Activators
- Transcriptional Activation