Kinetic Modeling, Thermodynamic Approach and Molecular Dynamics Simulation of Thermal Inactivation of Lipases from Burkholderia cepacia and Rhizomucor miehei
Abstract
:1. Introduction
2. Materials and Methods
2.1. Materials
2.2. Lipase Assay
2.3. Thermal Inactivation
2.4. Kinetic Models of Enzyme Inactivation
2.5. Statistical Analysis and Model Evaluation
2.6. Molecular Dynamics Simulations
3. Results and Discussion
3.1. Thermal Inactivation Analysis of Lipase PS and Palatase
3.2. Thermodynamic Analysis of Lipase PS and Palatase
3.3. Comparative Molecular Dynamics Simulation
4. Conclusions
Supplementary Materials
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Equation | Model | Equation a | Ref. |
---|---|---|---|
(1) | First-order | [25] | |
(2) | Weibull distribution | [26] | |
(3) | Distinct isoenzymes | [12,27] | |
(4) | Two-fraction | [27,28] | |
(5) | Multi component first-order | [29] | |
(6) | Series-type | [30] | |
(7) | nth order decay | [28] | |
(8) | Fractional conversion | [31] |
Lipase | Model (Eq.) | r2 | χ2 | SEM | Remark |
---|---|---|---|---|---|
Lipase PS | First-order (1) | [0.971;0.996] | [0.0004;0.0030] | [0.0024;0.0170] | Accepted: high r2 and low SEM and χ2; good fit for dependence temperature parameters |
Weibull (2) | [0.973;0.996] | [0.0004;0.0325] | [0.0024;0.1819] | Rejected: n = 1 (first-order model) | |
Distinct isoenzymes (3) | [0.974;0.997] | [0.0004;0.0068] | [0.0025;0.0383] | Rejected: negative parameter estimates | |
Two-fraction (4) | [0.971;0.997] | [0.0004;0.0078] | [0.0020;0.0437] | Rejected: negative parameters estimates | |
Multi component first order (5) | [0.974;0.996] | [0.0006;0.0082] | [0.0034;0.0414] | Rejected: negative parameters estimates | |
Series a (6) | — | — | — | Rejected: not generate parameters answers, either coefficients of determination | |
nth order (7) | — | — | — | Rejected: not generate parameters answers, either coefficients of determination | |
Fractional conversion (8) | — | — | — | Rejected: not generate coefficients of determination | |
Palatase | First-order (1) | [0.687;0.833] | [0.0452;0.1601] | [0.2145;0.6537] | Rejected: low r2 and high SEM and χ2 |
Weibull (2) | [0.965;0.994] | [0.0011;0.0026] | [0.0017;0.0124] | Accepted: higher r2 and lower SEM and χ2 | |
Distinct isoenzymes (3) | [0.749;0.872] | [0.0204;0.0425] | [0.1087;0.2144] | Rejected: equal parameter estimates; kL = kR | |
Two-fraction (4) | [0.896;0.946] | [0.0106;0.0376] | [0.0536;0.4599] | Rejected: negative parameters estimates | |
Multi component first order (5) | [0.896;0.946] | [0.7850;1.6388] | [1.3653;8.2733] | Rejected: negative parameters estimates | |
Series a (6) | — | — | — | Rejected: not generate coefficients of determination | |
nth order (7) | — | — | — | Rejected: not generate parameters answers, either coefficients of determination | |
Fractional conversion (8) | — | — | — | Rejected: not generate coefficients of determination |
Lipase (Model) | Temperature (°C) | r2 | k (min−1) | t1/2 (min) | D (min) | z (°C) |
---|---|---|---|---|---|---|
Lipase PS (first-order) | 40 | 0.988 | 0.0136 ± 0.0003 | 50.97 | 169 | 58.82 |
50 | 0.996 | 0.0197 ± 0.0002 | 35.19 | 117 | ||
60 | 0.998 | 0.0289 ± 0.0003 | 23.98 | 80 | ||
70 | 0.971 | 0.0440 ± 0.0014 | 15.75 | 52 | ||
Temperature (°C) | r2 | b (min−n) | n | tR (min) | z′ (°C) | |
Palatase (Weibull) | 40 | 0.994 | 1.97 × 10−7 ± 1.9 × 10−8 | 4.357 ± 0.173 | 41.97 | 43.86 |
50 | 0.987 | 1.54 × 10−5 ± 1.1 × 10−6 | 3.461 ± 0.227 | 31.57 | ||
60 | 0.990 | 9.37 × 10−5 ± 4.6 × 10−6 | 2.981 ± 0.158 | 29.70 | ||
70 | 0.965 | 4.22 × 10−4 ± 3.0 × 10−5 | 2.869 ± 0.262 | 20.07 |
Lipase | Ea (kJ mol−1) | Temperature (°C) | ΔH# (kJ mol−1) | ΔG# (kJ mol−1) | ΔS# (J mol−1 K−1) | ΔS#/ΔH# |
---|---|---|---|---|---|---|
Lipase PS | 34.80 | 40 | 32.20 | 98.57 | −212.07 | −2.06 |
50 | 32.11 | 100.81 | −212.69 | −2.14 | ||
60 | 32.03 | 102.96 | −213.00 | −2.21 | ||
70 | 31.95 | 104.94 | −212.80 | −2.28 | ||
Palatase a | 23.28 | 40 | 20.68 | 85.97 | −208.59 | −3.16 |
50 | 20.60 | 87.91 | −208.39 | −3.27 | ||
60 | 20.51 | 90.43 | −209.96 | −3.41 | ||
70 | 20.43 | 92.08 | −208.90 | −3.51 |
Lipase | Temperature (K) | Rg (Å) | Hydrogen Bonds | Salt Bridges | Disulfide Bonds |
---|---|---|---|---|---|
3LIP | 313 | 19.00 ± 0.08 | 74 | 2 | 1 |
343 | 19.01 ± 0.05 | 59 | 2 | 1 | |
3TGL | 313 | 17.15 ± 0.05 | 60 | 6 | 3 |
343 | 17.18 ± 0.06 | 51 | 6 | 3 |
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Ortega, N.; Sáez, L.; Palacios, D.; Busto, M.D. Kinetic Modeling, Thermodynamic Approach and Molecular Dynamics Simulation of Thermal Inactivation of Lipases from Burkholderia cepacia and Rhizomucor miehei. Int. J. Mol. Sci. 2022, 23, 6828. https://doi.org/10.3390/ijms23126828
Ortega N, Sáez L, Palacios D, Busto MD. Kinetic Modeling, Thermodynamic Approach and Molecular Dynamics Simulation of Thermal Inactivation of Lipases from Burkholderia cepacia and Rhizomucor miehei. International Journal of Molecular Sciences. 2022; 23(12):6828. https://doi.org/10.3390/ijms23126828
Chicago/Turabian StyleOrtega, Natividad, Laura Sáez, David Palacios, and María D. Busto. 2022. "Kinetic Modeling, Thermodynamic Approach and Molecular Dynamics Simulation of Thermal Inactivation of Lipases from Burkholderia cepacia and Rhizomucor miehei" International Journal of Molecular Sciences 23, no. 12: 6828. https://doi.org/10.3390/ijms23126828