Replication-coupled chromatin assembly generates a neuronal bilateral asymmetry in C. elegans.
Replication-coupled chromatin assembly generates a neuronal bilateral asymmetry in C. elegans.
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DOI:
10.1016/j.cell.2011.11.053
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发表时间:
2011-12-23
期刊:
影响因子:
64.5
通讯作者:
Horvitz HR
中科院分区:
文献类型:
--
作者:
Nakano S;Stillman B;Horvitz HR
Chromatin assembly is a fundamental cellular process, but its role during animal development remains largely elusive. Here we report that the CAF-1 protein complex, an evolutionarily conserved histone chaperone that deposits histone H3-H4 proteins onto replicating DNA, is required to generate a bilateral asymmetry in the C. elegans nervous system. We describe our findings that a mutation in one of 24 C. elegans histone H3 genes specifically eliminates this aspect of neuronal asymmetry. This histone H3 mutation causes a defect in the formation of a histone H3-H4 tetramer and the consequent inhibition of CAF-1-mediated nucleosome formation. Our results reveal that replication-coupled nucleosome assembly is necessary to generate a bilateral asymmetry in C. elegans neuroanatomy and suggest that left-right asymmetric epigenetic regulation can establish bilateral asymmetry in the nervous system.
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