Direct DNA crosslinking with CAP-C uncovers transcription-dependent chromatin organization at high resolution.
Direct DNA crosslinking with CAP-C uncovers transcription-dependent chromatin organization at high resolution.
复制标题
与CAP-C直接DNA交联会在高分辨率下揭示依赖于转录的染色质组织。
DOI:
10.1038/s41587-020-0643-8
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发表时间:
2021-03
影响因子:
46.9
通讯作者:
He C
中科院分区:
文献类型:
--
作者:
You Q;Cheng AY;Gu X;Harada BT;Yu M;Wu T;Ren B;Ouyang Z;He C
Determining the spatial organization of chromatin in cells mainly relies on crosslinking-based chromosome conformation capture techniques, but resolution and signal-to-noise ratio of these approaches is limited by interference from DNA-bound proteins. Here we introduce chemical-crosslinking assisted proximity capture (CAP-C), a method that uses multifunctional chemical crosslinkers with defined sizes to capture chromatin contacts. CAP-C generates chromatin contact maps at subkilobase (sub-kb) resolution with low background noise. We applied CAP-C to formaldehyde prefixed mouse embryonic stem cells (mESCs) and investigated loop domains (median size of 200 kb) and nonloop domains (median size of 9 kb). Transcription inhibition caused a greater loss of contacts in nonloop domains than loop domains. We uncovered conserved, transcription-state-dependent chromatin compartmentalization at high resolution that is shared from Drosophila to human, and a transcription-initiation-dependent nuclear subcompartment that brings multiple nonloop domains in close proximity. We also showed that CAP-C could be used to detect native chromatin conformation without formaldehyde prefixing.
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