Computational construction of 3D chromatin ensembles and prediction of functional interactions of alpha-globin locus from 5C data.
Computational construction of 3D chromatin ensembles and prediction of functional interactions of alpha-globin locus from 5C data.
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DOI:
10.1093/nar/gkx784
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发表时间:
2017-11-16
影响因子:
14.9
通讯作者:
Liang J
中科院分区:
文献类型:
--
作者:
Gürsoy G;Xu Y;Kenter AL;Liang J
Conformation capture technologies measure frequencies of interactions between chromatin regions. However, understanding gene-regulation require knowledge of detailed spatial structures of heterogeneous chromatin in cells. Here we describe the nC-SAC (n-Constrained-Self Avoiding Chromatin) method that transforms experimental interaction frequencies into 3D ensembles of chromatin chains. nC-SAC first distinguishes specific from non-specific interaction frequencies, then generates 3D chromatin ensembles using identified specific interactions as spatial constraints. Application to α-globin locus shows that these constraints (∼20%) drive the formation of ∼99% all experimentally captured interactions, in which ∼30% additional to the imposed constraints is found to be specific. Many novel specific spatial contacts not captured by experiments are also predicted. A subset, of which independent ChIA-PET data are available, is validated to be RNAPII-, CTCF-, and RAD21-mediated. Their positioning in the architectural context of imposed specific interactions from nC-SAC is highly important. Our results also suggest the presence of a many-body structural unit involving α-globin gene, its enhancers, and POL3RK gene for regulating the expression of α-globin in silent cells.
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46.9
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16.8
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影响因子:
64.5
作者:
Giorgetti L;Galupa R;Nora EP;Piolot T;Lam F;Dekker J;Tiana G;Heard E
通讯作者:
Heard E
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7
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Heidari N;Phanstiel DH;He C;Grubert F;Jahanbani F;Kasowski M;Zhang MQ;Snyder MP
通讯作者:
Snyder MP
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7
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Ay F;Bunnik EM;Varoquaux N;Bol SM;Prudhomme J;Vert JP;Noble WS;Le Roch KG
通讯作者:
Le Roch KG