Dynamic 3D chromatin architecture contributes to enhancer specificity and limb morphogenesis.

Dynamic 3D chromatin architecture contributes to enhancer specificity and limb morphogenesis.
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DOI:
10.1038/s41588-018-0221-x
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发表时间:
2018-10
期刊:
影响因子:
30.8
通讯作者:
Andrey, Guillaume
Andrey, Guillaume
中科院分区:
生物学1区
文献类型:
--
作者:
Kragesteen, Bjort K.;Spielmann, Malte;Paliou, Christina;Heinrich, Verena;Schoepflin, Robert;Esposito, Andrea;Annunziatella, Carlo;Bianco, Simona;Chiariello, Andrea M.;Jerkovic, Ivana;Harabula, Izabela;Guckelberger, Philine;Pechstein, Michael;Wittler, Lars;Chan, Wing-Lee;Franke, Martin;Lupianez, Dario G.;Kraft, Katerina;Timmermann, Bernd;Vingron, Martin;Visel, Axel;Nicodemi, Mario;Mundlos, Stefan;Andrey, Guillaume

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The regulatory specificity of enhancers and their interaction with gene promoters is thought to be controlled by their sequence and the binding of transcription factors. By studying Pitx1, a regulator of hindlimb development, we show that dynamic changes in chromatin conformation can restrict the activity of enhancers. Inconsistent with its hindlimb-restricted expression, Pitx1 is controlled by an enhancer (Pen) that shows activity in both fore- and hindlimb. By capture HiC and 3D-modeling of the locus, we demonstrate that fore- and hindlimbs have fundamentally different chromatin configurations, whereby Pen and Pitx1 interact in hindlimbs and are physically separated in forelimbs. Structural variants are able to convert the inactive into the active conformation, thereby inducing Pitx1 misexpression in the forelimb, causing partial arm-to-leg transformation in mice and humans. Thus, tissue-specific 3D chromatin conformation can contribute to enhancer activity and specificity in vivo and its disturbance can result in gene misexpression and disease.
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