Glutaredoxins regulate maize inflorescence meristem development via redox control of TGA transcriptional activity

Yang, RS, Xu, F, Wang, YM, Zhong, WS, Dong, L, Shi, YN, Tang, TJ, Sheng, HJ, Jackson, D, Yang, F (December 2021) Glutaredoxins regulate maize inflorescence meristem development via redox control of TGA transcriptional activity. Nature Plants. ISSN 2055-0278

Abstract

Glutaredoxins (GRXs) are small oxidoreductases that can modify target protein activities through control of the redox (reduction/oxidation) state by reducing or glutathionylating disulfide bridges. Although CC-type GRXs are plant specific and play important roles in many processes, the mechanisms by which they modulate the activity of target proteins in vivo are unknown. In this study, we show that a maize CC-type GRX, MALE STERILE CONVERTED ANTHER1 (MSCA1), acts redundantly with two paralogues, ZmGRX2 and ZmGRX5, to modify the redox state and the activity of its putative target, the TGA transcription factor FASCIATED EAR4 (FEA4) that acts as a negative regulator of inflorescence meristem development. We used CRISPR-Cas9 to create a GRX triple knockout, resulting in severe suppression of meristem, ear and tassel growth and reduced plant height. We further show that GRXs regulate the redox state, DNA accessibility and transcriptional activities of FEA4, which acts downstream of MSCA1 and its paralogues to control inflorescence development. Our findings reveal the function of GRXs in meristem development, and also provide direct evidence for GRX-mediated redox modification of target proteins in plants.

Item Type: Paper
Subjects: bioinformatics
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > transcription
bioinformatics > genomics and proteomics > genetics & nucleic acid processing
bioinformatics > genomics and proteomics
organism description > plant > maize
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification
organs, tissues, organelles, cell types and functions > tissues types and functions > inflorescence
organs, tissues, organelles, cell types and functions > tissues types and functions > meristem
organs, tissues, organelles, cell types and functions
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types
organs, tissues, organelles, cell types and functions > tissues types and functions
bioinformatics > genomics and proteomics > genetics & nucleic acid processing > protein structure, function, modification > protein types > transcription factor
CSHL Authors:
Communities: CSHL labs > Jackson lab
SWORD Depositor: CSHL Elements
Depositing User: CSHL Elements
Date: 14 December 2021
Date Deposited: 22 Dec 2021 16:02
Last Modified: 25 Jan 2024 21:14
URI: https://repository.cshl.edu/id/eprint/40464

Actions (login required)

Administrator's edit/view item Administrator's edit/view item