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Guo B, Lin B, Huang Q, Li Z, Zhuo K, Liao J. A nematode effector inhibits plant immunity by preventing cytosolic free Ca 2+ rise. PLANT, CELL & ENVIRONMENT 2022; 45:3070-3085. [PMID: 35880644 DOI: 10.1111/pce.14406] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/01/2022] [Revised: 07/20/2022] [Accepted: 07/21/2022] [Indexed: 06/15/2023]
Abstract
The Meloidogyne enterolobii effector MeTCTP is a member of the translationally controlled tumour protein (TCTP) family, involved in M. enterolobii parasitism. In this study, we found that MeTCTP forms homodimers and, in this form, binds calcium ions (Ca2+ ). At the same time, Ca2+ could induce homodimerization of MeTCTP. We further identified that MeTCTP inhibits the increase of cytosolic free Ca2+ concentration ([Ca2+ ]cyt ) in plant cells and suppresses plant immune responses. This includes suppression of reactive oxygen species burst and cell necrosis, further promoting M. enterolobii parasitism. Our results have elucidated that the effector MeTCTP can directly target Ca2+ by its homodimeric form and prevent [Ca2+ ]cyt rise in plant roots, revealing a novel mechanism utilized by plant pathogens to suppress plant immunity.
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Affiliation(s)
- Bin Guo
- Laboratory of Plant Nematology, College of Plant Protection, South China Agricultural University, Guangzhou, China
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
| | - Borong Lin
- Laboratory of Plant Nematology, College of Plant Protection, South China Agricultural University, Guangzhou, China
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
| | - Qiuling Huang
- Laboratory of Plant Nematology, College of Plant Protection, South China Agricultural University, Guangzhou, China
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
| | - Zhiwen Li
- Laboratory of Plant Nematology, College of Plant Protection, South China Agricultural University, Guangzhou, China
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
| | - Kan Zhuo
- Laboratory of Plant Nematology, College of Plant Protection, South China Agricultural University, Guangzhou, China
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
| | - Jinling Liao
- Laboratory of Plant Nematology, College of Plant Protection, South China Agricultural University, Guangzhou, China
- Guangdong Province Key Laboratory of Microbial Signals and Disease Control, South China Agricultural University, Guangzhou, China
- Guangdong Vocational College of Ecological Engineering, Guangzhou, China
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Velours C, Zhou J, Zecchin P, He N, Salameh M, Golinelli-Cohen MP, Golinelli-Pimpaneau B. Determination of the Absolute Molar Mass of [Fe-S]-Containing Proteins Using Size Exclusion Chromatography-Multi-Angle Light Scattering (SEC-MALS). Biomolecules 2022; 12:biom12020270. [PMID: 35204772 PMCID: PMC8961635 DOI: 10.3390/biom12020270] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Revised: 01/25/2022] [Accepted: 02/03/2022] [Indexed: 12/12/2022] Open
Abstract
Size Exclusion Chromatography coupled with Multi-Angle Light Scattering (SEC-MALS) is a technique that determines the absolute molar mass (molecular weight) of macromolecules in solution, such as proteins or polymers, by detecting their light scattering intensity. Because SEC-MALS does not rely on the assumption of the globular state of the analyte and the calibration of standards, the molar mass can be obtained for proteins of any shape, as well as for intrinsically disordered proteins and aggregates. Yet, corrections need to be made for samples that absorb light at the wavelength of the MALS laser, such as iron–sulfur [Fe-S] cluster-containing proteins. We analyze several examples of [2Fe-2S] and [4Fe-4S] cluster-containing proteins, for which various corrections were applied to determine the absolute molar mass of both the apo- and holo-forms. Importantly, the determination of the absolute molar mass of the [2Fe-2S]-containing holo-NEET proteins allowed us to ascertain a change in the oligomerization state upon cluster binding and, thus, to highlight one essential function of the cluster.
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Affiliation(s)
- Christophe Velours
- Fundamental Microbiology and Pathogenicity Laboratory, UMR 5234 CNRS-University of Bordeaux, SFR TransBioMed, 33076 Bordeaux, France
- Institute for Integrative Biology of the Cell (I2BC), CNRS, Université Paris-Saclay, 91198 Gif-sur-Yvette, France
- Correspondence: (C.V.); (B.G.-P.)
| | - Jingjing Zhou
- Laboratoire de Chimie des Processus Biologiques, UMR 8229 CNRS, Collège de France, Sorbonne Université, 11 Place Marcelin Berthelot, 75231 Paris, France; (J.Z.); (P.Z.); (N.H.)
| | - Paolo Zecchin
- Laboratoire de Chimie des Processus Biologiques, UMR 8229 CNRS, Collège de France, Sorbonne Université, 11 Place Marcelin Berthelot, 75231 Paris, France; (J.Z.); (P.Z.); (N.H.)
| | - Nisha He
- Laboratoire de Chimie des Processus Biologiques, UMR 8229 CNRS, Collège de France, Sorbonne Université, 11 Place Marcelin Berthelot, 75231 Paris, France; (J.Z.); (P.Z.); (N.H.)
| | - Myriam Salameh
- Institut de Chimie des Substances Naturelles, Université Paris-Saclay, CNRS, UPR2301, 91198 Gif-sur-Yvette, France; (M.S.); (M.-P.G.-C.)
| | - Marie-Pierre Golinelli-Cohen
- Institut de Chimie des Substances Naturelles, Université Paris-Saclay, CNRS, UPR2301, 91198 Gif-sur-Yvette, France; (M.S.); (M.-P.G.-C.)
| | - Béatrice Golinelli-Pimpaneau
- Laboratoire de Chimie des Processus Biologiques, UMR 8229 CNRS, Collège de France, Sorbonne Université, 11 Place Marcelin Berthelot, 75231 Paris, France; (J.Z.); (P.Z.); (N.H.)
- Correspondence: (C.V.); (B.G.-P.)
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