Specificity of Human Sulfiredoxin for Reductant and Peroxiredoxin Oligomeric State
Human peroxiredoxins (Prx) are a family of antioxidant enzymes involved in a myriad of cellular functions and diseases. During the reaction with peroxides (e.g., H<sub>2</sub>O<sub>2</sub>), the typical 2-Cys Prxs change oligomeric structure between higher order (do)decamers...
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doaj-d55fdb246166416a82421dcc5de5c96d2021-06-30T23:55:28ZengMDPI AGAntioxidants2076-39212021-06-011094694610.3390/antiox10060946Specificity of Human Sulfiredoxin for Reductant and Peroxiredoxin Oligomeric StateTom E. Forshaw0Julie A. Reisz1Kimberly J. Nelson2Rajesh Gumpena3J. Reed Lawson4Thomas J. Jönsson5Hanzhi Wu6Jill E. Clodfelter7Lynnette C. Johnson8Cristina M. Furdui9W. Todd Lowther10Department of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USADepartment of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USACenter for Structural Biology, Department of Biochemistry, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USACenter for Structural Biology, Department of Biochemistry, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USACenter for Structural Biology, Department of Biochemistry, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USACenter for Structural Biology, Department of Biochemistry, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USADepartment of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USACenter for Structural Biology, Department of Biochemistry, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USACenter for Structural Biology, Department of Biochemistry, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USADepartment of Internal Medicine, Section on Molecular Medicine, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USACenter for Structural Biology, Department of Biochemistry, Wake Forest School of Medicine, Medical Center Blvd., Winston-Salem, NC 27157, USAHuman peroxiredoxins (Prx) are a family of antioxidant enzymes involved in a myriad of cellular functions and diseases. During the reaction with peroxides (e.g., H<sub>2</sub>O<sub>2</sub>), the typical 2-Cys Prxs change oligomeric structure between higher order (do)decamers and disulfide-linked dimers, with the hyperoxidized inactive state (-SO<sub>2</sub>H) favoring the multimeric structure of the reduced enzyme. Here, we present a study on the structural requirements for the repair of hyperoxidized 2-Cys Prxs by human sulfiredoxin (Srx) and the relative efficacy of physiological reductants hydrogen sulfide (H<sub>2</sub>S) and glutathione (GSH) in this reaction. The crystal structure of the toroidal Prx1-Srx complex shows an extended active site interface. The loss of this interface within engineered Prx2 and Prx3 dimers yielded variants more resistant to hyperoxidation and repair by Srx. Finally, we reveal for the first time Prx isoform-dependent use of and potential cooperation between GSH and H<sub>2</sub>S in supporting Srx activity.https://www.mdpi.com/2076-3921/10/6/946redoxperoxiredoxinsulfiredoxinthiolshydrogen sulfideglutathione |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Tom E. Forshaw Julie A. Reisz Kimberly J. Nelson Rajesh Gumpena J. Reed Lawson Thomas J. Jönsson Hanzhi Wu Jill E. Clodfelter Lynnette C. Johnson Cristina M. Furdui W. Todd Lowther |
spellingShingle |
Tom E. Forshaw Julie A. Reisz Kimberly J. Nelson Rajesh Gumpena J. Reed Lawson Thomas J. Jönsson Hanzhi Wu Jill E. Clodfelter Lynnette C. Johnson Cristina M. Furdui W. Todd Lowther Specificity of Human Sulfiredoxin for Reductant and Peroxiredoxin Oligomeric State Antioxidants redox peroxiredoxin sulfiredoxin thiols hydrogen sulfide glutathione |
author_facet |
Tom E. Forshaw Julie A. Reisz Kimberly J. Nelson Rajesh Gumpena J. Reed Lawson Thomas J. Jönsson Hanzhi Wu Jill E. Clodfelter Lynnette C. Johnson Cristina M. Furdui W. Todd Lowther |
author_sort |
Tom E. Forshaw |
title |
Specificity of Human Sulfiredoxin for Reductant and Peroxiredoxin Oligomeric State |
title_short |
Specificity of Human Sulfiredoxin for Reductant and Peroxiredoxin Oligomeric State |
title_full |
Specificity of Human Sulfiredoxin for Reductant and Peroxiredoxin Oligomeric State |
title_fullStr |
Specificity of Human Sulfiredoxin for Reductant and Peroxiredoxin Oligomeric State |
title_full_unstemmed |
Specificity of Human Sulfiredoxin for Reductant and Peroxiredoxin Oligomeric State |
title_sort |
specificity of human sulfiredoxin for reductant and peroxiredoxin oligomeric state |
publisher |
MDPI AG |
series |
Antioxidants |
issn |
2076-3921 |
publishDate |
2021-06-01 |
description |
Human peroxiredoxins (Prx) are a family of antioxidant enzymes involved in a myriad of cellular functions and diseases. During the reaction with peroxides (e.g., H<sub>2</sub>O<sub>2</sub>), the typical 2-Cys Prxs change oligomeric structure between higher order (do)decamers and disulfide-linked dimers, with the hyperoxidized inactive state (-SO<sub>2</sub>H) favoring the multimeric structure of the reduced enzyme. Here, we present a study on the structural requirements for the repair of hyperoxidized 2-Cys Prxs by human sulfiredoxin (Srx) and the relative efficacy of physiological reductants hydrogen sulfide (H<sub>2</sub>S) and glutathione (GSH) in this reaction. The crystal structure of the toroidal Prx1-Srx complex shows an extended active site interface. The loss of this interface within engineered Prx2 and Prx3 dimers yielded variants more resistant to hyperoxidation and repair by Srx. Finally, we reveal for the first time Prx isoform-dependent use of and potential cooperation between GSH and H<sub>2</sub>S in supporting Srx activity. |
topic |
redox peroxiredoxin sulfiredoxin thiols hydrogen sulfide glutathione |
url |
https://www.mdpi.com/2076-3921/10/6/946 |
work_keys_str_mv |
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