Acetylation of conserved lysines fine-tunes mitochondrial malate dehydrogenase activity in land plants.

Autor: Balparda M; Molecular Plant Physiology, University of Bonn, Kirschallee 1, 53115, Bonn, Germany., Elsässer M; Molecular Evolution, Institute for Cellular and Molecular Botany (IZMB), University of Bonn, Kirschallee 1, 53115, Bonn, Germany.; Plant Energy Biology, Institute of Plant Biology and Biotechnology (IBBP), University of Münster, Schlossplatz 8, 48143, Münster, Germany., Badia MB; Plant Molecular Physiology and Biotechnology, Institute of Developmental and Molecular Biology of Plants, Heinrich Heine University, and Cluster of Excellence on Plant Sciences (CEPLAS), 40225, Düsseldorf, Germany.; Facultad de Quı́mica e Ingenierı́a del Rosario, Pontificia Universidad Católica Argentina, Av. Pellegrini 3314, S2002QEO, Rosario, Argentina., Giese J; Plant Physiology, Institute of Plant Biology and Biotechnology (IBBP), University of Münster, Schlossplatz 7, 48149, Münster, Germany., Bovdilova A; Plant Molecular Physiology and Biotechnology, Institute of Developmental and Molecular Biology of Plants, Heinrich Heine University, and Cluster of Excellence on Plant Sciences (CEPLAS), 40225, Düsseldorf, Germany., Hüdig M; Molecular Plant Physiology, University of Bonn, Kirschallee 1, 53115, Bonn, Germany.; Plant Molecular Physiology and Biotechnology, Institute of Developmental and Molecular Biology of Plants, Heinrich Heine University, and Cluster of Excellence on Plant Sciences (CEPLAS), 40225, Düsseldorf, Germany., Reinmuth L; Molecular Evolution, Institute for Cellular and Molecular Botany (IZMB), University of Bonn, Kirschallee 1, 53115, Bonn, Germany., Eirich J; Plant Physiology, Institute of Plant Biology and Biotechnology (IBBP), University of Münster, Schlossplatz 7, 48149, Münster, Germany., Schwarzländer M; Plant Energy Biology, Institute of Plant Biology and Biotechnology (IBBP), University of Münster, Schlossplatz 8, 48143, Münster, Germany., Finkemeier I; Plant Physiology, Institute of Plant Biology and Biotechnology (IBBP), University of Münster, Schlossplatz 7, 48149, Münster, Germany., Schallenberg-Rüdinger M; Molecular Evolution, Institute for Cellular and Molecular Botany (IZMB), University of Bonn, Kirschallee 1, 53115, Bonn, Germany., Maurino VG; Molecular Plant Physiology, University of Bonn, Kirschallee 1, 53115, Bonn, Germany.; Plant Molecular Physiology and Biotechnology, Institute of Developmental and Molecular Biology of Plants, Heinrich Heine University, and Cluster of Excellence on Plant Sciences (CEPLAS), 40225, Düsseldorf, Germany.
Jazyk: angličtina
Zdroj: The Plant journal : for cell and molecular biology [Plant J] 2022 Jan; Vol. 109 (1), pp. 92-111. Date of Electronic Publication: 2021 Nov 10.
DOI: 10.1111/tpj.15556
Abstrakt: Plants need to rapidly and flexibly adjust their metabolism to changes of their immediate environment. Since this necessity results from the sessile lifestyle of land plants, key mechanisms for orchestrating central metabolic acclimation are likely to have evolved early. Here, we explore the role of lysine acetylation as a post-translational modification to directly modulate metabolic function. We generated a lysine acetylome of the moss Physcomitrium patens and identified 638 lysine acetylation sites, mostly found in mitochondrial and plastidial proteins. A comparison with available angiosperm data pinpointed lysine acetylation as a conserved regulatory strategy in land plants. Focusing on mitochondrial central metabolism, we functionally analyzed acetylation of mitochondrial malate dehydrogenase (mMDH), which acts as a hub of plant metabolic flexibility. In P. patens mMDH1, we detected a single acetylated lysine located next to one of the four acetylation sites detected in Arabidopsis thaliana mMDH1. We assessed the kinetic behavior of recombinant A. thaliana and P. patens mMDH1 with site-specifically incorporated acetyl-lysines. Acetylation of A. thaliana mMDH1 at K169, K170, and K334 decreases its oxaloacetate reduction activity, while acetylation of P. patens mMDH1 at K172 increases this activity. We found modulation of the malate oxidation activity only in A. thaliana mMDH1, where acetylation of K334 strongly activated it. Comparative homology modeling of MDH proteins revealed that evolutionarily conserved lysines serve as hotspots of acetylation. Our combined analyses indicate lysine acetylation as a common strategy to fine-tune the activity of central metabolic enzymes with likely impact on plant acclimation capacity.
(© 2021 The Authors. The Plant Journal published by Society for Experimental Biology and John Wiley & Sons Ltd.)
Databáze: MEDLINE
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