Structural Basis for the Versatile and Methylation-Dependent Binding of CTCF to DNA.
Structural Basis for the Versatile and Methylation-Dependent Binding of CTCF to DNA.
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DOI:
10.1016/j.molcel.2017.05.004
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发表时间:
2017-06-01
期刊:
影响因子:
16
通讯作者:
Cheng X
中科院分区:
文献类型:
--
作者:
Hashimoto H;Wang D;Horton JR;Zhang X;Corces VG;Cheng X
The multidomain CCCTC-binding factor (CTCF), containing a tandem array of 11-zinc fingers (ZF), modulates the three-dimensional organization of chromatin. We crystallized the human CTCF DNA binding domain in complex with a known CTCF binding site. While ZF2 does not make sequence-specific contacts, each finger of ZF3-7 contacts three bases of the 15-bp consensus sequence. Each conserved nucleotide makes base-specific hydrogen bonds with a particular residue. Most of the variable base pairs within the core sequence also engage in interactions with the protein. These interactions compensate for deviations from the consensus sequence, allowing CTCF to adapt to sequence variations. CTCF is sensitive to cytosine methylation at position 2, but insensitive at position 12 of the 15-bp core sequence. These differences can be rationalized structurally. Although included in crystallizations, ZF10-11 are not visible, while ZF8-9 span the backbone of the DNA duplex, conferring no sequence specificity but adding to overall binding stability Hiashimoto et al. described several protein-DNA complex structures of human CTCF tandem zinc-finger array, explaining the adaptability of CTCF to sequence variations, the position-dependent effect of differential DNA methylation at two cytosine residues, and revealing a potential function of C-terminal ZF8-9 spanning across DNA phosphate backbone.
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影响因子:
64.8
作者:
通讯作者:
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DOI:
10.1038/nrg3663
发表时间:
2014-04
期刊:
Nature reviews. Genetics
影响因子:
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作者:
Ong CT;Corces VG
通讯作者:
Corces VG
影响因子:
64.8
作者:
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通讯作者:
Tilghman, SM
影响因子:
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作者:
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通讯作者:
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DOI:
10.1107/s0907444909052925
发表时间:
2010-02
期刊:
Acta crystallographica. Section D, Biological crystallography
影响因子:
--
作者:
Adams PD;Afonine PV;Bunkóczi G;Chen VB;Davis IW;Echols N;Headd JJ;Hung LW;Kapral GJ;Grosse-Kunstleve RW;McCoy AJ;Moriarty NW;Oeffner R;Read RJ;Richardson DC;Richardson JS;Terwilliger TC;Zwart PH
通讯作者:
Zwart PH