Computational design of the temperature optimum of an enzyme reaction
Cold-adapted enzymes are characterized both by a higher catalytic activity at low temperatures and by having their temperature optimum down-shifted, compared to mesophilic orthologs. In several cases, the optimum does not coincide with the onset of protein melting but reflects some other type of ina...
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ftpubmed:oai:pubmedcentral.nih.gov:10306287 2023-07-23T04:14:36+02:00 Computational design of the temperature optimum of an enzyme reaction van der Ent, Florian Skagseth, Susann Lund, Bjarte A. Sočan, Jaka Griese, Julia J. Brandsdal, Bjørn O. Åqvist, Johan 2023-06-28 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10306287/ http://www.ncbi.nlm.nih.gov/pubmed/37379391 https://doi.org/10.1126/sciadv.adi0963 en eng American Association for the Advancement of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10306287/ http://www.ncbi.nlm.nih.gov/pubmed/37379391 http://dx.doi.org/10.1126/sciadv.adi0963 Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Sci Adv Physical and Materials Sciences Text 2023 ftpubmed https://doi.org/10.1126/sciadv.adi0963 2023-07-02T01:30:06Z Cold-adapted enzymes are characterized both by a higher catalytic activity at low temperatures and by having their temperature optimum down-shifted, compared to mesophilic orthologs. In several cases, the optimum does not coincide with the onset of protein melting but reflects some other type of inactivation. In the psychrophilic α-amylase from an Antarctic bacterium, the inactivation is thought to originate from a specific enzyme-substrate interaction that breaks around room temperature. Here, we report a computational redesign of this enzyme aimed at shifting its temperature optimum upward. A set of mutations designed to stabilize the enzyme-substrate interaction were predicted by computer simulations of the catalytic reaction at different temperatures. The predictions were verified by kinetic experiments and crystal structures of the redesigned α-amylase, showing that the temperature optimum is indeed markedly shifted upward and that the critical surface loop controlling the temperature dependence approaches the target conformation observed in a mesophilic ortholog. Text Antarc* Antarctic PubMed Central (PMC) Antarctic Science Advances 9 26 |
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English |
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Physical and Materials Sciences |
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Physical and Materials Sciences van der Ent, Florian Skagseth, Susann Lund, Bjarte A. Sočan, Jaka Griese, Julia J. Brandsdal, Bjørn O. Åqvist, Johan Computational design of the temperature optimum of an enzyme reaction |
topic_facet |
Physical and Materials Sciences |
description |
Cold-adapted enzymes are characterized both by a higher catalytic activity at low temperatures and by having their temperature optimum down-shifted, compared to mesophilic orthologs. In several cases, the optimum does not coincide with the onset of protein melting but reflects some other type of inactivation. In the psychrophilic α-amylase from an Antarctic bacterium, the inactivation is thought to originate from a specific enzyme-substrate interaction that breaks around room temperature. Here, we report a computational redesign of this enzyme aimed at shifting its temperature optimum upward. A set of mutations designed to stabilize the enzyme-substrate interaction were predicted by computer simulations of the catalytic reaction at different temperatures. The predictions were verified by kinetic experiments and crystal structures of the redesigned α-amylase, showing that the temperature optimum is indeed markedly shifted upward and that the critical surface loop controlling the temperature dependence approaches the target conformation observed in a mesophilic ortholog. |
format |
Text |
author |
van der Ent, Florian Skagseth, Susann Lund, Bjarte A. Sočan, Jaka Griese, Julia J. Brandsdal, Bjørn O. Åqvist, Johan |
author_facet |
van der Ent, Florian Skagseth, Susann Lund, Bjarte A. Sočan, Jaka Griese, Julia J. Brandsdal, Bjørn O. Åqvist, Johan |
author_sort |
van der Ent, Florian |
title |
Computational design of the temperature optimum of an enzyme reaction |
title_short |
Computational design of the temperature optimum of an enzyme reaction |
title_full |
Computational design of the temperature optimum of an enzyme reaction |
title_fullStr |
Computational design of the temperature optimum of an enzyme reaction |
title_full_unstemmed |
Computational design of the temperature optimum of an enzyme reaction |
title_sort |
computational design of the temperature optimum of an enzyme reaction |
publisher |
American Association for the Advancement of Science |
publishDate |
2023 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10306287/ http://www.ncbi.nlm.nih.gov/pubmed/37379391 https://doi.org/10.1126/sciadv.adi0963 |
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Antarctic |
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Antarctic |
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Antarc* Antarctic |
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Antarc* Antarctic |
op_source |
Sci Adv |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC10306287/ http://www.ncbi.nlm.nih.gov/pubmed/37379391 http://dx.doi.org/10.1126/sciadv.adi0963 |
op_rights |
Copyright © 2023 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution License 4.0 (CC BY). https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution license (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
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https://doi.org/10.1126/sciadv.adi0963 |
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Science Advances |
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9 |
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26 |
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