1
|
Jiang B, Zhong Z, Su J, Zhu T, Yueh T, Bragasin J, Bu V, Zhou C, Lin C, Wang X. Co-condensation with photoexcited cryptochromes facilitates MAC3A to positively control hypocotyl growth in Arabidopsis. Sci Adv 2023; 9:eadh4048. [PMID: 37556549 PMCID: PMC10411877 DOI: 10.1126/sciadv.adh4048] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 07/06/2023] [Indexed: 08/11/2023]
Abstract
Cryptochromes (CRYs) are blue light receptors that mediate plant photoresponses through regulating gene expressions. We recently reported that Arabidopsis CRY2 could form light-elicited liquid condensates to control RNA methylation. However, whether CRY2 condensation is involved in other gene expression-regulatory processes remains unclear. Here, we show that MOS4-associated complex subunits 3A and 3B (MAC3A/3B) are CRY-interacting proteins and assembled into nuclear CRY condensates. mac3a3b double mutants exhibit hypersensitive photoinhibition of hypocotyl elongation, suggesting that MAC3A/3B positively control hypocotyl growth. We demonstrate the noncanonical activity of MAC3A as a DNA binding protein that modulates transcription. Genome-wide mapping of MAC3A-binding sites reveals that blue light enhances the association of MAC3A with its DNA targets, which requires CRYs. Further evidence indicates that MAC3A and ELONGATED HYPOCOTYL 5 (HY5) occupy overlapping genomic regions and compete for the same targets. These results argue that photocondensation of CRYs fine-tunes light-responsive hypocotyl growth by balancing the opposed effects of HY5 and MAC3A.
Collapse
Affiliation(s)
- Bochen Jiang
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, CA 90095, USA
| | - Zhenhui Zhong
- State Key Laboratory for Ecological Pest Control of Fujian and Taiwan Crops, College of Plant Protection, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Jun Su
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Tengfei Zhu
- Peking University Institute of Advanced Agricultural Sciences, Shandong Laboratory of Advanced Agricultural Sciences at Weifang, Weifang, Shandong 261325, China
| | - Timothy Yueh
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, CA 90095, USA
| | - Jielena Bragasin
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, CA 90095, USA
| | - Victoria Bu
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, CA 90095, USA
| | - Charles Zhou
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, CA 90095, USA
| | - Chentao Lin
- Department of Molecular, Cell, and Developmental Biology, University of California, Los Angeles, CA 90095, USA
- Basic Forestry and Proteomics Research Center, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xu Wang
- Peking University Institute of Advanced Agricultural Sciences, Shandong Laboratory of Advanced Agricultural Sciences at Weifang, Weifang, Shandong 261325, China
| |
Collapse
|