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Phytochrome B interacts with SWC6 and ARP6 to regulate H2A.Z deposition and photomorphogensis in Arabidopsis

Journal of integrative plant biology. 2021-06; 
Xuxu Wei, Wanting Wang, Peng Xu, Wenxiu Wang, Tongtong Guo, Shuang Kou, Minqing Liu, Yake Niu, Hong‐Quan Yang and Zhilei Mao
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Light serves as a crucial environmental cue which modulates plant growth and development, and which is controlled by multiple photoreceptors including the primary red light photoreceptor, phytochrome B (phyB). The signaling mechanism of phyB involves direct interactions with a group of basic helix-loop-helix (bHLH) transcription factors, PHYTOCHROME-INTERACTING FACTORS (PIFs), and the negative regulators of photomorphogenesis, COP1 and SPAs. H2A.Z is an evolutionarily conserved H2A variant which plays essential roles in transcriptional regulation. The replacement of H2A with H2A.Z is catalyzed by the SWR1 complex. Here, we show that the Pfr form of phyB physically interacts with the SWR1 complex subunits SWC6 a... More


ARP6; H2A.Z; SWC6; hypocotyl elongation; photomorphogenesis; phytochrome B; red light.