Multi-scale architecture of archaeal chromosomes.
Multi-scale architecture of archaeal chromosomes.
复制标题
古细菌染色体的多尺度结构。
DOI:
10.1016/j.molcel.2020.12.001
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发表时间:
2021-02-04
期刊:
影响因子:
16
通讯作者:
Bell SD
中科院分区:
文献类型:
--
作者:
Takemata N;Bell SD
Chromosome conformation capture (3C) technologies have identified topologically associating domains (TADs), and larger A/B compartments as two salient structural features of eukaryotic chromosomes. These structures are sculpted by the combined actions of transcription and structural maintenance of chromosomes (SMC) superfamily proteins. Bacterial chromosomes fold into TAD-like chromosomal interaction domains (CIDs) but do not display A/B compartment-type organization. We reveal that chromosomes of Sulfolobus archaea are organized into CID-like topological domains in addition to previously described larger A/B compartment-type structures. We uncover local rules governing the identity of the topological domains and their boundaries. We also identify long-range loop structures and provide evidence of a hub-like structure that colocalizes genes involved in ribosome biogenesis. In addition to providing high resolution descriptions of archaeal chromosome architectures, our data provide evidence for multiple modes of organization in prokaryotic chromosomes and yield insight into the evolution of eukaryotic chromosome conformation. Takemata and Bell reveal that chromosomes of archaea of the genus Sulfolobus organize into A and B compartments and, independently, into local domains akin to bacterial CIDs. Additionally, the genomes possess loop structures that can join loci separated by up to half the length of the circular chromosomes.
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