PMID- 24282406 OWN - NLM STAT- PubMed-not-MEDLINE DCOM- 20131127 LR - 20220310 IS - 1664-462X (Print) IS - 1664-462X (Electronic) IS - 1664-462X (Linking) VI - 4 DP - 2013 TI - Plant cytoplasmic GAPDH: redox post-translational modifications and moonlighting properties. PG - 450 LID - 10.3389/fpls.2013.00450 [doi] LID - 450 AB - Glyceraldehyde-3-phosphate dehydrogenase (GAPDH) is a ubiquitous enzyme involved in glycolysis and shown, particularly in animal cells, to play additional roles in several unrelated non-metabolic processes such as control of gene expression and apoptosis. This functional versatility is regulated, in part at least, by redox post-translational modifications that alter GAPDH catalytic activity and influence the subcellular localization of the enzyme. In spite of the well established moonlighting (multifunctional) properties of animal GAPDH, little is known about non-metabolic roles of GAPDH in plants. Plant cells contain several GAPDH isoforms with different catalytic and regulatory properties, located both in the cytoplasm and in plastids, and participating in glycolysis and the Calvin-Benson cycle. A general feature of all GAPDH proteins is the presence of an acidic catalytic cysteine in the active site that is overly sensitive to oxidative modifications, including glutathionylation and S-nitrosylation. In Arabidopsis, oxidatively modified cytoplasmic GAPDH has been successfully used as a tool to investigate the role of reduced glutathione, thioredoxins and glutaredoxins in the control of different types of redox post-translational modifications. Oxidative modifications inhibit GAPDH activity, but might enable additional functions in plant cells. Mounting evidence support the concept that plant cytoplasmic GAPDH may fulfill alternative, non-metabolic functions that are triggered by redox post-translational modifications of the protein under stress conditions. The aim of this review is to detail the molecular mechanisms underlying the redox regulation of plant cytoplasmic GAPDH in the light of its crystal structure, and to provide a brief inventory of the well known redox-dependent multi-facetted properties of animal GAPDH, together with the emerging roles of oxidatively modified GAPDH in stress signaling pathways in plants. FAU - Zaffagnini, Mirko AU - Zaffagnini M AD - Laboratory of Plant Redox Biology, Department of Pharmacy and Biotechnology, University of Bologna Bologna, Italy. FAU - Fermani, Simona AU - Fermani S FAU - Costa, Alex AU - Costa A FAU - Lemaire, Stephane D AU - Lemaire SD FAU - Trost, Paolo AU - Trost P LA - eng PT - Journal Article PT - Review DEP - 20131112 PL - Switzerland TA - Front Plant Sci JT - Frontiers in plant science JID - 101568200 PMC - PMC3824636 OTO - NOTNLM OT - S-nitrosylation OT - cysteine thiols OT - glycolytic glyceraldehyde-3-phosphate dehydrogenase OT - moonlighting protein OT - redox modifications EDAT- 2013/11/28 06:00 MHDA- 2013/11/28 06:01 PMCR- 2013/01/01 CRDT- 2013/11/28 06:00 PHST- 2013/09/30 00:00 [received] PHST- 2013/10/21 00:00 [accepted] PHST- 2013/11/28 06:00 [entrez] PHST- 2013/11/28 06:00 [pubmed] PHST- 2013/11/28 06:01 [medline] PHST- 2013/01/01 00:00 [pmc-release] AID - 10.3389/fpls.2013.00450 [doi] PST - epublish SO - Front Plant Sci. 2013 Nov 12;4:450. doi: 10.3389/fpls.2013.00450. eCollection 2013.