Thermal Inactivation of a Cold-Active Esterase PMGL3 Isolated from the Permafrost Metagenomic Library
PMGL3 is a cold-adapted esterase which was recently isolated from the permafrost metagenomic library. It exhibits maximum activity at 30 °C and low stability at elevated temperatures (40 °C and higher). Sequence alignment has revealed that PMGL3 is a member of the hormone-sensitive lipase (HSL) fami...
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ftpubmed:oai:pubmedcentral.nih.gov:6995580 2023-05-15T17:57:19+02:00 Thermal Inactivation of a Cold-Active Esterase PMGL3 Isolated from the Permafrost Metagenomic Library Kryukova, M.V. Petrovskaya, L.E. Kryukova, E.A. Lomakina, G.Yu. Yakimov, S.A. Maksimov, E.G. Boyko, K.M. Popov, V.O. Dolgikh, D.A. Kirpichnikov, M.P. 2019-12-16 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6995580/ http://www.ncbi.nlm.nih.gov/pubmed/31888238 https://doi.org/10.3390/biom9120880 en eng MDPI http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6995580/ http://www.ncbi.nlm.nih.gov/pubmed/31888238 http://dx.doi.org/10.3390/biom9120880 © 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). CC-BY Article Text 2019 ftpubmed https://doi.org/10.3390/biom9120880 2020-02-16T01:21:35Z PMGL3 is a cold-adapted esterase which was recently isolated from the permafrost metagenomic library. It exhibits maximum activity at 30 °C and low stability at elevated temperatures (40 °C and higher). Sequence alignment has revealed that PMGL3 is a member of the hormone-sensitive lipase (HSL) family. In this work, we demonstrated that incubation at 40 °C led to the inactivation of the enzyme (t(1/2) = 36 min), which was accompanied by the formation of tetramers and higher molecular weight aggregates. In order to increase the thermal stability of PMGL3, its two cysteines Cys49 and Cys207 were substituted by the hydrophobic residues, which are found at the corresponding positions of thermostable esterases from the HSL family. One of the obtained mutants, C207F, possessed improved stability at 40 °C (t(1/2) = 169 min) and increased surface hydrophobicity, whereas C49V was less stable in comparison with the wild type PMGL3. Both mutants exhibited reduced values of V(max) and k(cat), while C207F demonstrated increased affinity to the substrate, and improved catalytic efficiency. Text permafrost PubMed Central (PMC) Biomolecules 9 12 880 |
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Article Kryukova, M.V. Petrovskaya, L.E. Kryukova, E.A. Lomakina, G.Yu. Yakimov, S.A. Maksimov, E.G. Boyko, K.M. Popov, V.O. Dolgikh, D.A. Kirpichnikov, M.P. Thermal Inactivation of a Cold-Active Esterase PMGL3 Isolated from the Permafrost Metagenomic Library |
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PMGL3 is a cold-adapted esterase which was recently isolated from the permafrost metagenomic library. It exhibits maximum activity at 30 °C and low stability at elevated temperatures (40 °C and higher). Sequence alignment has revealed that PMGL3 is a member of the hormone-sensitive lipase (HSL) family. In this work, we demonstrated that incubation at 40 °C led to the inactivation of the enzyme (t(1/2) = 36 min), which was accompanied by the formation of tetramers and higher molecular weight aggregates. In order to increase the thermal stability of PMGL3, its two cysteines Cys49 and Cys207 were substituted by the hydrophobic residues, which are found at the corresponding positions of thermostable esterases from the HSL family. One of the obtained mutants, C207F, possessed improved stability at 40 °C (t(1/2) = 169 min) and increased surface hydrophobicity, whereas C49V was less stable in comparison with the wild type PMGL3. Both mutants exhibited reduced values of V(max) and k(cat), while C207F demonstrated increased affinity to the substrate, and improved catalytic efficiency. |
format |
Text |
author |
Kryukova, M.V. Petrovskaya, L.E. Kryukova, E.A. Lomakina, G.Yu. Yakimov, S.A. Maksimov, E.G. Boyko, K.M. Popov, V.O. Dolgikh, D.A. Kirpichnikov, M.P. |
author_facet |
Kryukova, M.V. Petrovskaya, L.E. Kryukova, E.A. Lomakina, G.Yu. Yakimov, S.A. Maksimov, E.G. Boyko, K.M. Popov, V.O. Dolgikh, D.A. Kirpichnikov, M.P. |
author_sort |
Kryukova, M.V. |
title |
Thermal Inactivation of a Cold-Active Esterase PMGL3 Isolated from the Permafrost Metagenomic Library |
title_short |
Thermal Inactivation of a Cold-Active Esterase PMGL3 Isolated from the Permafrost Metagenomic Library |
title_full |
Thermal Inactivation of a Cold-Active Esterase PMGL3 Isolated from the Permafrost Metagenomic Library |
title_fullStr |
Thermal Inactivation of a Cold-Active Esterase PMGL3 Isolated from the Permafrost Metagenomic Library |
title_full_unstemmed |
Thermal Inactivation of a Cold-Active Esterase PMGL3 Isolated from the Permafrost Metagenomic Library |
title_sort |
thermal inactivation of a cold-active esterase pmgl3 isolated from the permafrost metagenomic library |
publisher |
MDPI |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6995580/ http://www.ncbi.nlm.nih.gov/pubmed/31888238 https://doi.org/10.3390/biom9120880 |
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permafrost |
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permafrost |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6995580/ http://www.ncbi.nlm.nih.gov/pubmed/31888238 http://dx.doi.org/10.3390/biom9120880 |
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© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
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CC-BY |
op_doi |
https://doi.org/10.3390/biom9120880 |
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