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In the loop: how chromatin topology links genome structure to function in
mechanisms underlying learning and memory
#MMPMID28024185
Watson LA
; Tsai LH
Curr Opin Neurobiol
2017[Apr]; 43
(?): 48-55
PMID28024185
show ga
Different aspects of learning, memory, and cognition are regulated by epigenetic
mechanisms such as covalent DNA modifications and histone post-translational
modifications. More recently, the modulation of chromatin architecture and
nuclear organization is emerging as a key factor in dynamic transcriptional
regulation of the post-mitotic neuron. For instance, neuronal activity induces
relocalization of gene loci to 'transcription factories', and specific
enhancer-promoter looping contacts allow for precise transcriptional regulation.
Moreover, neuronal activity-dependent DNA double-strand break formation in the
promoter of immediate early genes appears to overcome topological constraints on
transcription. Together, these findings point to a critical role for genome
topology in integrating dynamic environmental signals to define precise
spatiotemporal gene expression programs supporting cognitive processes.