ATP and Mg2+ promote the reversible oligomerization and aggregation of chloroplast 2-Cys peroxiredoxin

2-Cys peroxiredoxins (2-Cys Prxs) are ubiquitous peroxidases with important roles in cellular antioxidant defense and hydrogen peroxide-mediated signaling. Post-translational modifications of conserved cysteines cause the transition from low to high molecular weight oligomers, triggering the functio...

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Autores principales: Arán, Martín, Mora García, Santiago, Wolosiuk, Ricardo Alejandro
Publicado: 2011
Materias:
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00219258_v286_n26_p23441_Aran
http://hdl.handle.net/20.500.12110/paper_00219258_v286_n26_p23441_Aran
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id paper:paper_00219258_v286_n26_p23441_Aran
record_format dspace
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic 2 ,2 ,2-trifluoroethanol
Antioxidant defense
Chaperone activity
Conserved residues
Cosolvents
Cysteine residues
Decamers
Functional changes
Helical conformation
Higher order
In-line
Low-to-high
Molecular chaperones
Native conformation
Non-covalent interaction
Peroxiredoxins
Post-translational modifications
Quaternary structure
Redox transformations
Self-polymerization
Amino acids
Chlorophyll
Conformations
Dichroism
Ethanol
Hydrogen peroxide
Oligomerization
Polymerization
Spheres
Transmission electron microscopy
Oligomers
2 cysteine peroxiredoxin
adenosine triphosphate
arginine
cysteine
magnesium ion
peroxiredoxin
trifluoroethanol
unclassified drug
magnesium
peroxiredoxin
recombinant protein
vegetable protein
alpha helix
article
beta sheet
cell energy
chloroplast
circular dichroism
controlled study
enzyme activity
enzyme regulation
molecular interaction
molecular weight
nonhuman
oligomerization
oxidation reduction reaction
particle size
photochemistry
priority journal
protein aggregation
protein analysis
protein conformation
protein function
protein polymerization
protein processing
protein quaternary structure
rapeseed
surface plasmon resonance
transmission electron microscopy
chemistry
chloroplast
enzymology
genetics
metabolism
protein multimerization
protein secondary structure
Adenosine Triphosphate
Chloroplasts
Circular Dichroism
Magnesium
Peroxiredoxins
Plant Proteins
Protein Multimerization
Protein Structure, Quaternary
Protein Structure, Secondary
Recombinant Proteins
spellingShingle 2 ,2 ,2-trifluoroethanol
Antioxidant defense
Chaperone activity
Conserved residues
Cosolvents
Cysteine residues
Decamers
Functional changes
Helical conformation
Higher order
In-line
Low-to-high
Molecular chaperones
Native conformation
Non-covalent interaction
Peroxiredoxins
Post-translational modifications
Quaternary structure
Redox transformations
Self-polymerization
Amino acids
Chlorophyll
Conformations
Dichroism
Ethanol
Hydrogen peroxide
Oligomerization
Polymerization
Spheres
Transmission electron microscopy
Oligomers
2 cysteine peroxiredoxin
adenosine triphosphate
arginine
cysteine
magnesium ion
peroxiredoxin
trifluoroethanol
unclassified drug
magnesium
peroxiredoxin
recombinant protein
vegetable protein
alpha helix
article
beta sheet
cell energy
chloroplast
circular dichroism
controlled study
enzyme activity
enzyme regulation
molecular interaction
molecular weight
nonhuman
oligomerization
oxidation reduction reaction
particle size
photochemistry
priority journal
protein aggregation
protein analysis
protein conformation
protein function
protein polymerization
protein processing
protein quaternary structure
rapeseed
surface plasmon resonance
transmission electron microscopy
chemistry
chloroplast
enzymology
genetics
metabolism
protein multimerization
protein secondary structure
Adenosine Triphosphate
Chloroplasts
Circular Dichroism
Magnesium
Peroxiredoxins
Plant Proteins
Protein Multimerization
Protein Structure, Quaternary
Protein Structure, Secondary
Recombinant Proteins
Arán, Martín
Mora García, Santiago
Wolosiuk, Ricardo Alejandro
ATP and Mg2+ promote the reversible oligomerization and aggregation of chloroplast 2-Cys peroxiredoxin
topic_facet 2 ,2 ,2-trifluoroethanol
Antioxidant defense
Chaperone activity
Conserved residues
Cosolvents
Cysteine residues
Decamers
Functional changes
Helical conformation
Higher order
In-line
Low-to-high
Molecular chaperones
Native conformation
Non-covalent interaction
Peroxiredoxins
Post-translational modifications
Quaternary structure
Redox transformations
Self-polymerization
Amino acids
Chlorophyll
Conformations
Dichroism
Ethanol
Hydrogen peroxide
Oligomerization
Polymerization
Spheres
Transmission electron microscopy
Oligomers
2 cysteine peroxiredoxin
adenosine triphosphate
arginine
cysteine
magnesium ion
peroxiredoxin
trifluoroethanol
unclassified drug
magnesium
peroxiredoxin
recombinant protein
vegetable protein
alpha helix
article
beta sheet
cell energy
chloroplast
circular dichroism
controlled study
enzyme activity
enzyme regulation
molecular interaction
molecular weight
nonhuman
oligomerization
oxidation reduction reaction
particle size
photochemistry
priority journal
protein aggregation
protein analysis
protein conformation
protein function
protein polymerization
protein processing
protein quaternary structure
rapeseed
surface plasmon resonance
transmission electron microscopy
chemistry
chloroplast
enzymology
genetics
metabolism
protein multimerization
protein secondary structure
Adenosine Triphosphate
Chloroplasts
Circular Dichroism
Magnesium
Peroxiredoxins
Plant Proteins
Protein Multimerization
Protein Structure, Quaternary
Protein Structure, Secondary
Recombinant Proteins
description 2-Cys peroxiredoxins (2-Cys Prxs) are ubiquitous peroxidases with important roles in cellular antioxidant defense and hydrogen peroxide-mediated signaling. Post-translational modifications of conserved cysteines cause the transition from low to high molecular weight oligomers, triggering the functional change from peroxidase to molecular chaperone. However, it remains unclear how non-covalent interactions of 2-Cys Prx with metabolites modulate the quaternary structure. Here, we disclose that ATP and Mg2+ (ATP/Mg) promote the self-polymerization of chloroplast 2-Cys Prx (polypeptide 23.5 kDa) into soluble higher order assemblies (>2 MDa) that proceed to insoluble aggregates beyond 5mMATP. Remarkably, the withdrawal of ATP or Mg2+ brings soluble oligomers and insoluble aggregates back to the native conformation without compromising the associated functions. As confirmed by transmission electron microscopy, ATP/Mg drive the toroid-like decamers (diameter 13 nm) to the formation of large sphere-like particles (diameter ∼30 nm). Circular dichroism studies on ATP-labeled 2-Cys Prx reveal that ATP/Mg enhance the proportion of β-sheets with the concurrent decrease in the content of α-helices. In line with this observation, the formation of insoluble aggregates is strongly prevented by 2,2,2-trifluoroethanol, a cosolvent employed to induce α-helical conformations. We further find that the response of self-polymerization to ATP/Mg departs abruptly from that of the associated peroxidase and chaperone activities when two highly conserved residues, Arg129 and Arg152, are mutated. Collectively, our data uncover that non-covalent interactions of ATP/Mg with 2-Cys Prx modulate dynamically the quaternary structure, thereby coupling the non-redox chemistry of cell energy with redox transformations at cysteine residues. © 2011 by The American Society for Biochemistry and Molecular Biology, Inc.
author Arán, Martín
Mora García, Santiago
Wolosiuk, Ricardo Alejandro
author_facet Arán, Martín
Mora García, Santiago
Wolosiuk, Ricardo Alejandro
author_sort Arán, Martín
title ATP and Mg2+ promote the reversible oligomerization and aggregation of chloroplast 2-Cys peroxiredoxin
title_short ATP and Mg2+ promote the reversible oligomerization and aggregation of chloroplast 2-Cys peroxiredoxin
title_full ATP and Mg2+ promote the reversible oligomerization and aggregation of chloroplast 2-Cys peroxiredoxin
title_fullStr ATP and Mg2+ promote the reversible oligomerization and aggregation of chloroplast 2-Cys peroxiredoxin
title_full_unstemmed ATP and Mg2+ promote the reversible oligomerization and aggregation of chloroplast 2-Cys peroxiredoxin
title_sort atp and mg2+ promote the reversible oligomerization and aggregation of chloroplast 2-cys peroxiredoxin
publishDate 2011
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00219258_v286_n26_p23441_Aran
http://hdl.handle.net/20.500.12110/paper_00219258_v286_n26_p23441_Aran
work_keys_str_mv AT aranmartin atpandmg2promotethereversibleoligomerizationandaggregationofchloroplast2cysperoxiredoxin
AT moragarciasantiago atpandmg2promotethereversibleoligomerizationandaggregationofchloroplast2cysperoxiredoxin
AT wolosiukricardoalejandro atpandmg2promotethereversibleoligomerizationandaggregationofchloroplast2cysperoxiredoxin
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spelling paper:paper_00219258_v286_n26_p23441_Aran2023-06-08T14:43:31Z ATP and Mg2+ promote the reversible oligomerization and aggregation of chloroplast 2-Cys peroxiredoxin Arán, Martín Mora García, Santiago Wolosiuk, Ricardo Alejandro 2 ,2 ,2-trifluoroethanol Antioxidant defense Chaperone activity Conserved residues Cosolvents Cysteine residues Decamers Functional changes Helical conformation Higher order In-line Low-to-high Molecular chaperones Native conformation Non-covalent interaction Peroxiredoxins Post-translational modifications Quaternary structure Redox transformations Self-polymerization Amino acids Chlorophyll Conformations Dichroism Ethanol Hydrogen peroxide Oligomerization Polymerization Spheres Transmission electron microscopy Oligomers 2 cysteine peroxiredoxin adenosine triphosphate arginine cysteine magnesium ion peroxiredoxin trifluoroethanol unclassified drug magnesium peroxiredoxin recombinant protein vegetable protein alpha helix article beta sheet cell energy chloroplast circular dichroism controlled study enzyme activity enzyme regulation molecular interaction molecular weight nonhuman oligomerization oxidation reduction reaction particle size photochemistry priority journal protein aggregation protein analysis protein conformation protein function protein polymerization protein processing protein quaternary structure rapeseed surface plasmon resonance transmission electron microscopy chemistry chloroplast enzymology genetics metabolism protein multimerization protein secondary structure Adenosine Triphosphate Chloroplasts Circular Dichroism Magnesium Peroxiredoxins Plant Proteins Protein Multimerization Protein Structure, Quaternary Protein Structure, Secondary Recombinant Proteins 2-Cys peroxiredoxins (2-Cys Prxs) are ubiquitous peroxidases with important roles in cellular antioxidant defense and hydrogen peroxide-mediated signaling. Post-translational modifications of conserved cysteines cause the transition from low to high molecular weight oligomers, triggering the functional change from peroxidase to molecular chaperone. However, it remains unclear how non-covalent interactions of 2-Cys Prx with metabolites modulate the quaternary structure. Here, we disclose that ATP and Mg2+ (ATP/Mg) promote the self-polymerization of chloroplast 2-Cys Prx (polypeptide 23.5 kDa) into soluble higher order assemblies (>2 MDa) that proceed to insoluble aggregates beyond 5mMATP. Remarkably, the withdrawal of ATP or Mg2+ brings soluble oligomers and insoluble aggregates back to the native conformation without compromising the associated functions. As confirmed by transmission electron microscopy, ATP/Mg drive the toroid-like decamers (diameter 13 nm) to the formation of large sphere-like particles (diameter ∼30 nm). Circular dichroism studies on ATP-labeled 2-Cys Prx reveal that ATP/Mg enhance the proportion of β-sheets with the concurrent decrease in the content of α-helices. In line with this observation, the formation of insoluble aggregates is strongly prevented by 2,2,2-trifluoroethanol, a cosolvent employed to induce α-helical conformations. We further find that the response of self-polymerization to ATP/Mg departs abruptly from that of the associated peroxidase and chaperone activities when two highly conserved residues, Arg129 and Arg152, are mutated. Collectively, our data uncover that non-covalent interactions of ATP/Mg with 2-Cys Prx modulate dynamically the quaternary structure, thereby coupling the non-redox chemistry of cell energy with redox transformations at cysteine residues. © 2011 by The American Society for Biochemistry and Molecular Biology, Inc. Fil:Aran, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Mora-García, S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Wolosiuk, R.A. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00219258_v286_n26_p23441_Aran http://hdl.handle.net/20.500.12110/paper_00219258_v286_n26_p23441_Aran