Chemical Modification of Microcin J25 Reveals New Insights on the Stereospecific Requirements for Antimicrobial Activity
Abstract
:1. Introduction
2. Results
2.1. Chemical Treatment
2.2. Minimum Inhibitory Concentration (MIC)
2.3. Synergy Study
2.4. Minimal Biofilm Eradication Concentration (MBEC)
2.5. Stability Assays
2.6. MS/MS Analysis
2.7. Ion-Mobility Mass Spectrometry (IM-MS) Analysis
2.8. Circular Dichroism (CD) Spectroscopy
2.9. Nuclear Magnetic Ressonance (NMR) Spectroscopy
2.10. Structure Calculation
3. Discussion
4. Materials and Methods
4.1. Heterologous Expression of MccJ25
4.2. Minimum Inhibitory Concentration (MIC)
4.3. Synergy Study
4.4. Minimal Biofilm Eradication Concentration (MBEC)
4.5. NMR Spectroscopy
4.6. Ion-Mobility Mass Spectrometry (IM-MS)
4.7. MS/MS Analysis
4.8. Structure Calculation
4.9. Circular Dichroism (CD)
Supplementary Materials
Author Contributions
Acknowledgments
Conflicts of Interest
References
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Strains[a] | Native MccJ25 | New Compound |
---|---|---|
Escherichia coli MDR 39255 | 0.5 | >256 |
Escherichia coli MDR 208691 | >128 | >128 |
Escherichia coli MDR 246415 | 00625 | >128 |
Escherichia coli MDR 239910 | >128 | >128 |
Salmonella enterica ATCC 14028 | >128 | >128 |
Salmonella enterica ATCC 13076 | <0.0625 | >128 |
Salmonella enterica ATCC 49214 | 0.8 | >128 |
Salmonella typhimurium SY5015 | >128 | >128 |
Residue | δ (ppm)[a] | Residue | δ (ppm)[a] |
---|---|---|---|
Ser18 | 7.80 | Glu8 | 7.90 |
Gly4 | 7.80 | Ile13 | 7.89 |
Tyr9 | 7.84 | Ala3 | 8.44 |
His5 | 7.79 | Val11 | 8.42 |
Gly12 | 8.39 |
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Martin-Gómez, H.; Jorba, M.; Albericio, F.; Viñas, M.; Tulla-Puche, J. Chemical Modification of Microcin J25 Reveals New Insights on the Stereospecific Requirements for Antimicrobial Activity. Int. J. Mol. Sci. 2019, 20, 5152. https://doi.org/10.3390/ijms20205152
Martin-Gómez H, Jorba M, Albericio F, Viñas M, Tulla-Puche J. Chemical Modification of Microcin J25 Reveals New Insights on the Stereospecific Requirements for Antimicrobial Activity. International Journal of Molecular Sciences. 2019; 20(20):5152. https://doi.org/10.3390/ijms20205152
Chicago/Turabian StyleMartin-Gómez, Helena, Marta Jorba, Fernando Albericio, Miguel Viñas, and Judit Tulla-Puche. 2019. "Chemical Modification of Microcin J25 Reveals New Insights on the Stereospecific Requirements for Antimicrobial Activity" International Journal of Molecular Sciences 20, no. 20: 5152. https://doi.org/10.3390/ijms20205152