Arabidopsis cryptochrome 1 controls photomorphogenesis through regulation of H2A.Z deposition

• DOI: 10.1093/plcell/koab091
• Publication Date: 2021-03-23T20:36:37Z
• Authors: Zhilei Mao; Xuxu Wei; Ling Li; Peng Xu; Jingyi Zhang; Wenxiu Wang; Tongtong Guo; Shuang Kou; Wanting Wang; Langxi Miao; Xiaoli Cao; Jiachen Zhao; Guangqiong Yang; Shilong Zhang; Hongli Lian; Hong-Quan Yang
• Keywords: Photomorphogenesis

Light is a key environmental cue that fundamentally regulates plant growth and development, which mediated by the multiple photoreceptors including blue light (BL) photoreceptor cryptochrome 1 (CRY1). The signaling mechanism of Arabidopsis thaliana CRY1 involves direct interactions with CONSTITUTIVE PHOTOMORPHOGENIC (COP1)/SUPPRESSOR OF PHYA-105 stabilization COP1 substrate ELONGATED HYPOCOTYL 5 (HY5). H2A.Z an evolutionarily conserved histone variant, plays critical role in transcriptional regulation through its deposition chromatin catalyzed SWR1 complex. Here we show physically interacts SWC6 ARP6, complex core subunits are essential for mediating deposition, BL-dependent manner, BL-activated enhances interaction ARP6. Moreover, HY5 ARP6 to recruitment target loci. Based on previous studies our findings, propose promotes regulate gene expression photomorphogenesis BL enhancement both activity loci, likely HY5, respectively.