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

URL: https://www.ncbi.nlm.nih.gov/pubmed/34907313
DOI: 10.1038/s41477-021-01029-2

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 > genomics and proteomics > genetics & nucleic acid processing > DNA, RNA structure, function, modification > transcription
organism description > plant > maize
organs, tissues, organelles, cell types and functions > tissues types and functions > inflorescence
organs, tissues, organelles, cell types and functions > tissues types and functions > meristem
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: 22 Dec 2021 16:02
URI: https://repository.cshl.edu/id/eprint/40464

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