Molecular Mechanism of Methanol Inhibition in CALB-Catalyzed Alcoholysis: Analyzing Molecular Dynamics Simulations by a Markov State Model
Lipases are widely used enzymes that catalyze hydrolysis and alcoholysis of fatty acid esters. At high concentrations of small alcohols such as methanol or ethanol, many lipases are inhibited by the substrate. The molecular basis of the inhibition of Candida antarctica lipase B (CALB) by methanol wa...
Main Authors: | , , |
---|---|
Format: | Other Non-Article Part of Journal/Newspaper |
Language: | unknown |
Published: |
2021
|
Subjects: | |
Online Access: | https://doi.org/10.1021/acs.jctc.1c00559.s001 |
id |
ftsmithonian:oai:figshare.com:article/16587137 |
---|---|
record_format |
openpolar |
spelling |
ftsmithonian:oai:figshare.com:article/16587137 2023-05-15T13:54:13+02:00 Molecular Mechanism of Methanol Inhibition in CALB-Catalyzed Alcoholysis: Analyzing Molecular Dynamics Simulations by a Markov State Model Henrique F. Carvalho (11408021) Valerio Ferrario (651292) Jürgen Pleiss (1723024) 2021-09-08T00:00:00Z https://doi.org/10.1021/acs.jctc.1c00559.s001 unknown https://figshare.com/articles/journal_contribution/Molecular_Mechanism_of_Methanol_Inhibition_in_CALB-Catalyzed_Alcoholysis_Analyzing_Molecular_Dynamics_Simulations_by_a_Markov_State_Model/16587137 doi:10.1021/acs.jctc.1c00559.s001 CC BY-NC 4.0 CC-BY-NC Biophysics Biochemistry Genetics Molecular Biology Pharmacology Biotechnology Inorganic Chemistry Biological Sciences not elsewhere classified Chemical Sciences not elsewhere classified widely used enzymes markov state models fatty acid esters experimental activity profile substrate binding kinetics substrate access channel structural analysis uncovered unbiased molecular dynamics kinetic bottleneck results derive kinetic information productive methanol binding methanol patches close beyond 300 mm realistic substrate concentrations unbiased md simulations 300 mm msm analysis molecular mechanism molecular basis 50 mm small alcohols msms ) modeled fluxes many lipases high concentrations helix α10 gradual formation good agreement findings demonstrate catalyze hydrolysis active site Text Journal contribution 2021 ftsmithonian https://doi.org/10.1021/acs.jctc.1c00559.s001 2021-12-20T02:39:25Z Lipases are widely used enzymes that catalyze hydrolysis and alcoholysis of fatty acid esters. At high concentrations of small alcohols such as methanol or ethanol, many lipases are inhibited by the substrate. The molecular basis of the inhibition of Candida antarctica lipase B (CALB) by methanol was investigated by unbiased molecular dynamics (MD) simulations, and the substrate binding kinetics was analyzed by Markov state models (MSMs). The modeled fluxes of productive methanol binding at concentrations between 50 mM and 5.5 M were in good agreement with the experimental activity profile of CALB, with a peak at 300 mM. The kinetic and structural analysis uncovered the molecular basis of CALB inhibition. Beyond 300 mM, the kinetic bottleneck results from crowding of methanol in the substrate access channel, which is caused by the gradual formation of methanol patches close to Leu140 (helix α5), Leu278, and Ile285 (helix α10) at a distance of 4–5 Å from the active site. Our findings demonstrate the usefulness of unbiased MD simulations to study enzyme–substrate interactions at realistic substrate concentrations and the feasibility of scale-bridging by an MSM analysis to derive kinetic information. Other Non-Article Part of Journal/Newspaper Antarc* Antarctica Unknown |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
ftsmithonian |
language |
unknown |
topic |
Biophysics Biochemistry Genetics Molecular Biology Pharmacology Biotechnology Inorganic Chemistry Biological Sciences not elsewhere classified Chemical Sciences not elsewhere classified widely used enzymes markov state models fatty acid esters experimental activity profile substrate binding kinetics substrate access channel structural analysis uncovered unbiased molecular dynamics kinetic bottleneck results derive kinetic information productive methanol binding methanol patches close beyond 300 mm realistic substrate concentrations unbiased md simulations 300 mm msm analysis molecular mechanism molecular basis 50 mm small alcohols msms ) modeled fluxes many lipases high concentrations helix α10 gradual formation good agreement findings demonstrate catalyze hydrolysis active site |
spellingShingle |
Biophysics Biochemistry Genetics Molecular Biology Pharmacology Biotechnology Inorganic Chemistry Biological Sciences not elsewhere classified Chemical Sciences not elsewhere classified widely used enzymes markov state models fatty acid esters experimental activity profile substrate binding kinetics substrate access channel structural analysis uncovered unbiased molecular dynamics kinetic bottleneck results derive kinetic information productive methanol binding methanol patches close beyond 300 mm realistic substrate concentrations unbiased md simulations 300 mm msm analysis molecular mechanism molecular basis 50 mm small alcohols msms ) modeled fluxes many lipases high concentrations helix α10 gradual formation good agreement findings demonstrate catalyze hydrolysis active site Henrique F. Carvalho (11408021) Valerio Ferrario (651292) Jürgen Pleiss (1723024) Molecular Mechanism of Methanol Inhibition in CALB-Catalyzed Alcoholysis: Analyzing Molecular Dynamics Simulations by a Markov State Model |
topic_facet |
Biophysics Biochemistry Genetics Molecular Biology Pharmacology Biotechnology Inorganic Chemistry Biological Sciences not elsewhere classified Chemical Sciences not elsewhere classified widely used enzymes markov state models fatty acid esters experimental activity profile substrate binding kinetics substrate access channel structural analysis uncovered unbiased molecular dynamics kinetic bottleneck results derive kinetic information productive methanol binding methanol patches close beyond 300 mm realistic substrate concentrations unbiased md simulations 300 mm msm analysis molecular mechanism molecular basis 50 mm small alcohols msms ) modeled fluxes many lipases high concentrations helix α10 gradual formation good agreement findings demonstrate catalyze hydrolysis active site |
description |
Lipases are widely used enzymes that catalyze hydrolysis and alcoholysis of fatty acid esters. At high concentrations of small alcohols such as methanol or ethanol, many lipases are inhibited by the substrate. The molecular basis of the inhibition of Candida antarctica lipase B (CALB) by methanol was investigated by unbiased molecular dynamics (MD) simulations, and the substrate binding kinetics was analyzed by Markov state models (MSMs). The modeled fluxes of productive methanol binding at concentrations between 50 mM and 5.5 M were in good agreement with the experimental activity profile of CALB, with a peak at 300 mM. The kinetic and structural analysis uncovered the molecular basis of CALB inhibition. Beyond 300 mM, the kinetic bottleneck results from crowding of methanol in the substrate access channel, which is caused by the gradual formation of methanol patches close to Leu140 (helix α5), Leu278, and Ile285 (helix α10) at a distance of 4–5 Å from the active site. Our findings demonstrate the usefulness of unbiased MD simulations to study enzyme–substrate interactions at realistic substrate concentrations and the feasibility of scale-bridging by an MSM analysis to derive kinetic information. |
format |
Other Non-Article Part of Journal/Newspaper |
author |
Henrique F. Carvalho (11408021) Valerio Ferrario (651292) Jürgen Pleiss (1723024) |
author_facet |
Henrique F. Carvalho (11408021) Valerio Ferrario (651292) Jürgen Pleiss (1723024) |
author_sort |
Henrique F. Carvalho (11408021) |
title |
Molecular Mechanism of Methanol Inhibition in CALB-Catalyzed Alcoholysis: Analyzing Molecular Dynamics Simulations by a Markov State Model |
title_short |
Molecular Mechanism of Methanol Inhibition in CALB-Catalyzed Alcoholysis: Analyzing Molecular Dynamics Simulations by a Markov State Model |
title_full |
Molecular Mechanism of Methanol Inhibition in CALB-Catalyzed Alcoholysis: Analyzing Molecular Dynamics Simulations by a Markov State Model |
title_fullStr |
Molecular Mechanism of Methanol Inhibition in CALB-Catalyzed Alcoholysis: Analyzing Molecular Dynamics Simulations by a Markov State Model |
title_full_unstemmed |
Molecular Mechanism of Methanol Inhibition in CALB-Catalyzed Alcoholysis: Analyzing Molecular Dynamics Simulations by a Markov State Model |
title_sort |
molecular mechanism of methanol inhibition in calb-catalyzed alcoholysis: analyzing molecular dynamics simulations by a markov state model |
publishDate |
2021 |
url |
https://doi.org/10.1021/acs.jctc.1c00559.s001 |
genre |
Antarc* Antarctica |
genre_facet |
Antarc* Antarctica |
op_relation |
https://figshare.com/articles/journal_contribution/Molecular_Mechanism_of_Methanol_Inhibition_in_CALB-Catalyzed_Alcoholysis_Analyzing_Molecular_Dynamics_Simulations_by_a_Markov_State_Model/16587137 doi:10.1021/acs.jctc.1c00559.s001 |
op_rights |
CC BY-NC 4.0 |
op_rightsnorm |
CC-BY-NC |
op_doi |
https://doi.org/10.1021/acs.jctc.1c00559.s001 |
_version_ |
1766259897060556800 |