Dynamic chromatin accessibility deploys heterotypic cis/trans-acting factors driving stomatal cell-fate commitment.

Dynamic chromatin accessibility deploys heterotypic cis/trans-acting factors driving stomatal cell-fate commitment.
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DOI:
10.1038/s41477-022-01304-w
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发表时间:
2022-12
期刊:
影响因子:
18
通讯作者:
Torii, Keiko U.
Torii, Keiko U.
中科院分区:
生物学1区
文献类型:
--
作者:
Kim, Eun-Deok;Dorrity, Michael W.;Fitzgerald, Bridget A.;Seo, Hyemin;Sepuru, Krishna Mohan;Queitsch, Christine;Mitsuda, Nobutaka;Han, Soon-Ki;Torii, Keiko U.

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Chromatin architecture and transcription factor (TF) binding underpin cell-fate specification during development, but their mutual regulatory relationships remain unclear. Here we report an atlas of dynamic chromatin landscapes during stomatal cell-lineage progression, in which sequential cell-state transitions are governed by lineage-specific bHLH TFs. Major reprogramming of chromatin accessibility occurs at the proliferation-to-differentiation transition. We discover novel co-cis regulatory elements (CREs) signifying the early precursor stage, BBR/BPC (GAGA) and bHLH (E-box) motifs, where master-regulatory bHLH TFs, SPEECHLESS and MUTE, consecutively bind to initiate and terminate the proliferative state, respectively. BPC TFs complex with MUTE to repress SPEECHLESS expression through a local deposition of repressive histone marks. We elucidate the mechanism by which cell-state-specific heterotypic TF complexes facilitate cell-fate commitment by recruiting chromatin modifiers via key co-CREs. Chromatin accessibility dynamics profiling throughout the development of the stomatal lineage uncovers a crucial role for heterotypic cis- and trans-acting factors. These drive cell-fate commitment during specialized cell-type differentiation.
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