Explanation of the Formation of Complexes between Representatives of Oxazolidinones and HDAS-β-CD Using Molecular Modeling as a Complementary Technique to cEKC and NMR
Abstract
:1. Introduction
1.1. General Concept
1.2. Evolution of Views on the Mechanisms of Chiral Recognition
1.3. Published Results of cEKC Experiments and NMR Measurement of New Oxazolidinone Analogues
2. Results and Discussion
3. Computational Methods
3.1. Preparing the Molecular Dynamic Calculations for TED and RAD
3.2. Calculating Binding Enthalpies Using Explicit Water Molecular Dynamics Simulations (Absolute Binding Free Energy)
3.3. Calculating Binding Free Energies (Enthalpies) Using MM-PBSA and MM-GBSA Methods
4. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
References
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Analyte | Type of BGE | Separation Conditions | EMO Reversal for a Leading Compound | Ref. | Method of Determination of Binding Constant | pH | Binding Constant Ka * [M−1] | Ref. | |
---|---|---|---|---|---|---|---|---|---|
-(R) | -(S) | ||||||||
LIN leading | ACE | 27.5 mM HDAS-β-CD in 50 mM borate buffer, pH 9.0, 15 °C, capillary (1), NP, 15 kV | 18.75 mM HDAS-β-CD in 50 mM borate buffer, pH 8.0, 15 °C, capillary (2), RP, 15 kV | [4] | NMR diffusion, D2O buffer | 2.4 | 76 ± 5 | 66 ± 5 | [5] |
7.0 | 52 ± 2 | 35 ± 2 | |||||||
LIN | ACE | 37.5 mM HDAS-β-CD in 50 mM formic buffer, pH 4.0 with ACN (81.4:18.6, v/v), 27 °C, capillary (1), 12 kV, NP/ or 35 mM HDAS-β-CD in 50 mM borate buffer, pH 9.0 with ACN (81.4:18.6, v/v), 27 °C, capillary (1), 12 kV, NP | not observed | [6] | cEKC | 4.0 | 1311 ± 256 | 1507 ± 307 | [6] |
9.0 | 571 ± 80 | 625 ± 88 | |||||||
TED leading | 4.0 | 747 ± 155 | 728 ± 145 | ||||||
9.0 | 319 ± 51 | 326 ± 50 | |||||||
TED | - | - | - | NMR diffusion, D2O | - | 140 ± 30 | - | [8] | |
TED-PO4 | - | 98 ± 20 | - | ||||||
LIN | ACE | 6 mM HDAS-β-CD in 50 mM phosphoric buffer, pH 2.5, capillary (1), 28 kV, 17–27 °C, NP | 18 mM HDAS-β-CD in 50 mM phosphate buffer, pH 6.6, 27 °C, capillary (1), NP | [9] | cEKC | 2.5 | 41.5 ± 10 | 42.9 ± 10 | [9] |
6.6 | 45.8 ± 10 | 53.4 ± 10 | |||||||
RAD leading | 20 mM HDAS-β-CD in 50 mM phosphoric buffer, pH 2.5, capillary (1), 28 kV, 52 °C, RP (partial resolution) | 2.5 | 2940 ± 600 | 2817 ± 600 | |||||
6.6 | 999 ± 200 | 1082 ± 200 | |||||||
LIN | NACE | not observed with HDAS-β-CD | 45 mM HDMS-β-CD in MeOH/ACN (85:15, v/v), 200 mM TFA/20 mM ammonium formate, capillary (1); 25 kV, 22 °C, NP | [12] nd | nd | nd | nd | - | |
STD leading | 5 mM HDAS-β-CD in MeOH/ACN (85:15, v/v), 200 mM TFA/20 mM ammonium formate, capillary (1); 25 kV, 22 °C, NP |
Compound | Average Binding Enthalpies [kcal/mol] (b) | |||||||
---|---|---|---|---|---|---|---|---|
StrA | StrB | StrC | ||||||
H2O | MeOH/ACN | H2O | MeOH/ACN | H2O | ||||
MD | PBSA (GBSA) | PBSA (GBSA) | MD | PBSA (GBSA) | PBSA (GBSA) | MD | PBSA (GBSA) | |
LIN-(R) (a) | − | −21.6 ± 4.8 (−21.1 ± 3.9) | − | − | −26.4 ± 4.5 (−31.7 ± 4.5) | - | - | - |
LIN-S (a) | − | −21.7 ± 5.0 (−22.5 ± 3.3) | − | − | 24.7 ± 3.8 (−30.4 ± 2.6) | - | - | - |
TED-(R) | −21.3 ± 1.7 | −16.2 ± 0.2 (−18.8 ± 0.2) | −16.4 ± 0.2 (−19.1 ± 0.2) | −21.4 ± 1.2 | −22.9 ± 1.0 (−27.9 ± 0.8) | −23.2 ± 1.1 (−28.2 ± 0.8) | −17.5 ± 2.2 | −10.6 ± 2.8 (−9.9 ± 2.7) |
TED-(S) | −21.4 ± 1.5 | −16.1 ± 0.4 (−18.8 ± 0.4) | −16.4 ± 0.4 (−19.2 ± 0.4) | −21.9 ± 0.5 | −23.7 ± 1.1 (−28.3 ± 1.0) | −24.0 ± 1.1 (−28.6 ± 1.0) | - | - |
RAD-(R) | −23.4 ± 0.3 | −28.6 ± 0.3 (−31.1 ± 0.3) | −29.3 ± 0.2 (−31.8 ± 0.3) | −23.6 ± 0.8 | −28.2 ± 0.7 (−31.1 ± 0.7) | −29.1 ± 0.7 (−31.9 ± 0.7) | −21.9 ± 1.9 | −17.2 ± 2.2 (−17.4 ± 2.9) |
RAD-(S) | −24.3 ± 0.4 | −30.2 ± 0.4 (−32.3 ± 0.5) | −31.2 ± 0.4 (−33.2 ± 0.5) | −23.8 ± 0.6 | 27.0 ± 3.8 (−29.9 ± 4.1) | 27.8 ± 4.1 (−30.5 ± 4.1) | - | - |
RADprot-(R) | −26.6 ± 0.9 | −26.6 ± 0.5 (−30.4 ± 0.4) | −30.8 ± 0.7 (−33.5± 0.3) | −27.7 ± 0.7 | −33.3 ± 0.8 (−36.1 ± 0.7) | −40.6 ± 0.8 (−40.8± 0.7) | −20.2 ± 3.2 | −16.4 ± 1.8 −15.8 ± 2.2 |
RADprot-(S) | −27.1 ± 0.6 | −31.3 ± 0.5 (−34.4 ± 0.3) | −35.8 ± 0.7 (−37.6 ± 0.4) | −27.5 ± 0.8 | −34.2 ± 0.7 (−36.9 ± 0.5) | −41.3 ± 0.8 (−41.5 ± 0.6) | - | - |
STD (a) | −18.9 ± 0.7 | −23.4 ± 0.7 (−25.9 ± 0.8) | −24.1 ± 0.7 (−26.6 ± 0.7) | −20.2 ± 0.8 | −25.8 ± 2.1 (−29.3 ± 1.0) | −26.6 ± 2.1 (−29.9 ± 1.0) | −16.5 ± 1.1 | −5.5 ± 4.0 −5.5 ± 3.5 |
STDprot (a) | −18.8 ± 0.7 | −23.8 ± 0.9 (−26.1 ± 0.8) | −24.3 ± 1.2 (−26.7 ± 1.1) | −19.9 ± 0.6 | −26.2 ± 1.0 (−32.1 ± 0.9) | −32.8 ± 1.1 (−36.2 ± 1.2) | - | - |
Complex Structure | Intermolecular H-Bonds | |||
---|---|---|---|---|
Name | Av. Distance [Å] | Population | Av. H-Bonds No. | |
StrA–TED | - | - | No | 0 |
StrB–TED | - | - | No | 0 |
StrA–RAD | RAD-N(1)H … CD-SO4− | 2.29 +/− 0.47 | High | 1.30 (R) 2.06 (S) |
RAD-N(3)Ha … CD-O3′ | 2.24 +/− 0.34 | High | ||
RAD-N(4)H … CD-O3′ | 2.17 +/− 0.30 | High | ||
RAD-N(4)H … CD-O2′ | 2.29 +/− 0.34 | Mid | ||
RAD-N(3)Ha … CD-O3 | 2.60 +/− 0.28 | Mid | ||
RAD-N(3)Ha … CD-O2 | 2.57 +/− 0.31 | Mid | ||
RAD-N(3)Ha … CD-O2′ | 2.75 +/− 0.30 | Low | ||
StrB–RAD | RAD-N(4)H … CD-SO4− | 2.24 +/− 0.35 | High | 2.08 (R) 2.01 (S) |
RAD-N(3)Ha … CD-SO4− | 2.30 +/− 0.35 | High | ||
RAD-N(3)Ha … CD-O5 | 2.44 +/− 0.31 | Mid | ||
RAD-N(4)H … CD-O5 | 2.39 +/− 0.31 | Mid | ||
RAD-N(4)H … CD-O6 | 2.44 +/− 0.29 | Low | ||
StrA–RADprot | RADprot-N(1)H … CD-SO4− | 2.29 +/− 0.46 | High | 1.94 (R) 2.59 (S) |
RADprot-N(3)Hb … CD-O2′ | 2.12 +/− 0.28 | High | ||
RADprot-N(3)Hb … CD-O3′ | 2.18 +/− 0.35 | High | ||
RADprot-N(3)Ha … CD-O2′ | 2.14 +/− 0.29 | High | ||
RADprot-N(3)Ha … CD-O3′ | 2.08 +/− 0.23 | High | ||
RADprot-N(4)H … CD-O2′ | 2.12 +/− 0.28 | Mid | ||
RADprot-N(4)H … CD-O3′ | 2.22 +/− 0.32 | Mid | ||
StrB–RADprot | RADprot-N(3)Ha … CD-SO4− | 2.27 +/− 0.37 | High | 3.25 (R) 3.21 (S) (*) 3.65 (S) |
RADprot-N(3)Hb … CD-SO4− | 2.23 +/− 0.35 | High | ||
RADprot-N(4)H … CD-SO4− | 2.23 +/− 0.37 | High | ||
RADprot-N(1)H … CD-O2′ | 2.23 +/− 0.41 | Low | ||
(*)RADprot-N(1)H … CD-O3′ | (*) 2.54 +/− 0.44 | (*)High |
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Bocian, W.; Bednarek, E.; Michalska, K. Explanation of the Formation of Complexes between Representatives of Oxazolidinones and HDAS-β-CD Using Molecular Modeling as a Complementary Technique to cEKC and NMR. Int. J. Mol. Sci. 2021, 22, 7139. https://doi.org/10.3390/ijms22137139
Bocian W, Bednarek E, Michalska K. Explanation of the Formation of Complexes between Representatives of Oxazolidinones and HDAS-β-CD Using Molecular Modeling as a Complementary Technique to cEKC and NMR. International Journal of Molecular Sciences. 2021; 22(13):7139. https://doi.org/10.3390/ijms22137139
Chicago/Turabian StyleBocian, Wojciech, Elżbieta Bednarek, and Katarzyna Michalska. 2021. "Explanation of the Formation of Complexes between Representatives of Oxazolidinones and HDAS-β-CD Using Molecular Modeling as a Complementary Technique to cEKC and NMR" International Journal of Molecular Sciences 22, no. 13: 7139. https://doi.org/10.3390/ijms22137139