Nanoscale chromatin imaging and analysis platform bridges 4D chromatin organization with molecular function.

Nanoscale chromatin imaging and analysis platform bridges 4D chromatin organization with molecular function.
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DOI:
10.1126/sciadv.abe4310
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发表时间:
2021-01
期刊:
影响因子:
13.6
通讯作者:
Backman V
Backman V
中科院分区:
综合性期刊1区
文献类型:
--
作者:
Li Y;Eshein A;Virk RKA;Eid A;Wu W;Frederick J;VanDerway D;Gladstein S;Huang K;Shim AR;Anthony NM;Bauer GM;Zhou X;Agrawal V;Pujadas EM;Jain S;Esteve G;Chandler JE;Nguyen TQ;Bleher R;de Pablo JJ;Szleifer I;Dravid VP;Almassalha LM;Backman V

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nano-ChIA combines multiple nanoimaging modalities to uncover 4D chromatin organization and its relationship to molecular function. Extending across multiple length scales, dynamic chromatin structure is linked to transcription through the regulation of genome organization. However, no individual technique can fully elucidate this structure and its relation to molecular function at all length and time scales at both a single-cell level and a population level. Here, we present a multitechnique nanoscale chromatin imaging and analysis (nano-ChIA) platform that consolidates electron tomography of the primary chromatin fiber, optical super-resolution imaging of transcription processes, and label-free nano-sensing of chromatin packing and its dynamics in live cells. Using nano-ChIA, we observed that chromatin is localized into spatially separable packing domains, with an average diameter of around 200 nanometers, sub-megabase genomic size, and an internal fractal structure. The chromatin packing behavior of these domains exhibits a complex bidirectional relationship with active gene transcription. Furthermore, we found that properties of PDs are correlated among progenitor and progeny cells across cell division.
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