2026-03-24 理化学研究所
WIND1はヒストン修飾複合体を形成し、遺伝子発現のオン／オフを切り替えて発生運命を転換
＜関連情報＞
- https://www.riken.jp/press/2026/20260324_1/index.html
- https://www.cell.com/molecular-plant/fulltext/S1674-2052(26)00075-4
WIND1は、体細胞胚発生中にヒストンアセチル化と脱アセチル化を介した転写再プログラミングを協調的に統合することにより、細胞運命転換を制御する WIND1 controls cell fate transition through coordinately integrating histone acetylation and deacetylation-mediated transcriptional reprogramming during somatic embryogenesis
Akira Iwase ∙ Arika Takebayashi ∙ Fu-Yu Hung ∙ … ∙ Takamasa Suzuki ∙ Ken Shirasu, ∙ Keiko Sugimoto
Molecular Plant Published:March 10, 2026
DOI:https://doi.org/10.1016/j.molp.2026.03.005
ABSTRACT
Regeneration involves large-scale transcriptional reprogramming to drive cell identity transitions. These transcriptional changes are tightly coupled with chromatin remodelling but molecular mechanisms that coordinate these changes remain unclear. Here we show that WOUND INDUCED DEDIFFERENTIATION 1 (WIND1) transcription factor promotes somatic embryogenesis by repressing pre-existing cell fate and activating new cell identity programmes. WIND1 interacts with histone deacetylase HISTONE DEACETYLASE 9 (HDA9) and histone acetyltransferase complex component HOMOLOG OF YEAST ADA1 2a (ADA2a) via conserved N-terminal domain. These interactions enable WIND1 to mediate both H3K27 deacetylation and acetylation at distinct target loci, leading to repression of organ-primordium/procambium development genes such as AINTEGUMENTA (ANT) and activation of embryogenesis regulators including LEAFY COTYLEDON 2 (LEC2). Our findings identify WIND1 as a bifunctional chromatin regulator that integrates opposing histone acetylation dynamics to coordinate transcriptional reprogramming. This mechanism provides a molecular framework for how a transcription factor directs complex cell fate transitions during regeneration.
