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Lyophilization protects [FeFe]-hydrogenases against O(2)-induced H-cluster degradation

Nature has developed an impressive repertoire of metal-based enzymes that perform complex chemical reactions under moderate conditions. Catalysts that produce molecular hydrogen (H(2)) are particularly promising for renewable energy applications. Unfortunately, natural and chemical H(2)-catalysts ar...

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Autores principales: Noth, Jens, Kositzki, Ramona, Klein, Kathrin, Winkler, Martin, Haumann, Michael, Happe, Thomas
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4568494/
https://www.ncbi.nlm.nih.gov/pubmed/26364994
http://dx.doi.org/10.1038/srep13978
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author Noth, Jens
Kositzki, Ramona
Klein, Kathrin
Winkler, Martin
Haumann, Michael
Happe, Thomas
author_facet Noth, Jens
Kositzki, Ramona
Klein, Kathrin
Winkler, Martin
Haumann, Michael
Happe, Thomas
author_sort Noth, Jens
collection PubMed
description Nature has developed an impressive repertoire of metal-based enzymes that perform complex chemical reactions under moderate conditions. Catalysts that produce molecular hydrogen (H(2)) are particularly promising for renewable energy applications. Unfortunately, natural and chemical H(2)-catalysts are often irreversibly degraded by molecular oxygen (O(2)). Here we present a straightforward procedure based on freeze-drying (lyophilization), that turns [FeFe]-hydrogenases, which are excellent H(2)-producers, but typically extremely O(2)-sensitive in solution, into enzymes that are fully resistant against O(2). Complete dryness protects and conserves both, the [FeFe]-hydrogenase proteins and their inorganic active-site cofactor (H-cluster), when exposed to 100% O(2) for days. The full H(2)-formation capacity is restored after solvation of the lyophilized enzymes. However, even minimal moisturizing re-establishes O(2)-sensitivity. The dry [FeFe]-hydrogenase material is superior also for advanced spectroscopic investigations on the H-cluster reaction mechanism. Our method provides a convenient way for long-term storage and impacts on potential biotechnological hydrogen production applications of hydrogenase enzymes.
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spelling pubmed-45684942015-09-23 Lyophilization protects [FeFe]-hydrogenases against O(2)-induced H-cluster degradation Noth, Jens Kositzki, Ramona Klein, Kathrin Winkler, Martin Haumann, Michael Happe, Thomas Sci Rep Article Nature has developed an impressive repertoire of metal-based enzymes that perform complex chemical reactions under moderate conditions. Catalysts that produce molecular hydrogen (H(2)) are particularly promising for renewable energy applications. Unfortunately, natural and chemical H(2)-catalysts are often irreversibly degraded by molecular oxygen (O(2)). Here we present a straightforward procedure based on freeze-drying (lyophilization), that turns [FeFe]-hydrogenases, which are excellent H(2)-producers, but typically extremely O(2)-sensitive in solution, into enzymes that are fully resistant against O(2). Complete dryness protects and conserves both, the [FeFe]-hydrogenase proteins and their inorganic active-site cofactor (H-cluster), when exposed to 100% O(2) for days. The full H(2)-formation capacity is restored after solvation of the lyophilized enzymes. However, even minimal moisturizing re-establishes O(2)-sensitivity. The dry [FeFe]-hydrogenase material is superior also for advanced spectroscopic investigations on the H-cluster reaction mechanism. Our method provides a convenient way for long-term storage and impacts on potential biotechnological hydrogen production applications of hydrogenase enzymes. Nature Publishing Group 2015-09-14 /pmc/articles/PMC4568494/ /pubmed/26364994 http://dx.doi.org/10.1038/srep13978 Text en Copyright © 2015, Macmillan Publishers Limited http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Noth, Jens
Kositzki, Ramona
Klein, Kathrin
Winkler, Martin
Haumann, Michael
Happe, Thomas
Lyophilization protects [FeFe]-hydrogenases against O(2)-induced H-cluster degradation
title Lyophilization protects [FeFe]-hydrogenases against O(2)-induced H-cluster degradation
title_full Lyophilization protects [FeFe]-hydrogenases against O(2)-induced H-cluster degradation
title_fullStr Lyophilization protects [FeFe]-hydrogenases against O(2)-induced H-cluster degradation
title_full_unstemmed Lyophilization protects [FeFe]-hydrogenases against O(2)-induced H-cluster degradation
title_short Lyophilization protects [FeFe]-hydrogenases against O(2)-induced H-cluster degradation
title_sort lyophilization protects [fefe]-hydrogenases against o(2)-induced h-cluster degradation
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4568494/
https://www.ncbi.nlm.nih.gov/pubmed/26364994
http://dx.doi.org/10.1038/srep13978
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