Dynamics of CTCF- and cohesin-mediated chromatin looping revealed by live-cell imaging.
Dynamics of CTCF- and cohesin-mediated chromatin looping revealed by live-cell imaging.
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DOI:
10.1126/science.abn6583
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发表时间:
2022-04-29
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Animal genomes are folded into loops and topologically associating domains (TADs) by CTCF and loop extruding cohesins, but the live dynamics of loop formation and stability remain unknown. Here, we directly visualize chromatin looping at the Fbn2 TAD in mouse embryonic stem cells using super-resolution live-cell imaging and quantify looping dynamics by Bayesian inference. Unexpectedly, the Fbn2 loop is both rare and dynamic, with a looped fraction of ~3-6.5% and a median loop lifetime of ~10-30 min. Our results establish that the Fbn2 TAD is highly dynamic, where ~92% of the time cohesin-extruded loops exist within the TAD without bridging both CTCF boundaries. This suggests that single CTCF boundaries rather than the fully CTCF-CTCF looped state may be the primary regulators of functional interactions. Super-resolution live-cell imaging of CTCF/cohesin-mediated chromatin loops reveal these loops to be rare and dynamic.
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DOI:
10.1126/science.aar7831
发表时间:
2018-04-06
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Ganji M;Shaltiel IA;Bisht S;Kim E;Kalichava A;Haering CH;Dekker C
通讯作者:
Dekker C
影响因子:
16.6
作者:
Cattoni DI;Cardozo Gizzi AM;Georgieva M;Di Stefano M;Valeri A;Chamousset D;Houbron C;Déjardin S;Fiche JB;González I;Chang JM;Sexton T;Marti-Renom MA;Bantignies F;Cavalli G;Nollmann M
通讯作者:
Nollmann M
影响因子:
64.5
作者:
Bonev B;Mendelson Cohen N;Szabo Q;Fritsch L;Papadopoulos GL;Lubling Y;Xu X;Lv X;Hugnot JP;Tanay A;Cavalli G
通讯作者:
Cavalli G
影响因子:
12.3
作者:
Arbona JM;Herbert S;Fabre E;Zimmer C
通讯作者:
Zimmer C
影响因子:
4.3
作者:
Eastman P;Swails J;Chodera JD;McGibbon RT;Zhao Y;Beauchamp KA;Wang LP;Simmonett AC;Harrigan MP;Stern CD;Wiewiora RP;Brooks BR;Pande VS
通讯作者:
Pande VS