Abstract
Affinity capillary electrophoresis was used to study quantitatively the noncovalent interactions between β-lactoglobulin (β-LG), a milk whey protein, and two lantibiotics, nisin (a dairy biopreservative lantibiotic) and duramycin (a bovine mastitis treatment lantibiotic). The study involved measuring the change in effective electrophoretic mobility of the lantibiotic as the concentration of β-LG in the background electrolyte is increased. Nonlinear regression analysis was used to model the dependence of the effective mobility of the lantibiotic on β-LG concentration in the BGE. Using this approach, binding constants were determined to be 3.1 (±0.2) × 108 M−1 for nisin and 2.2 (±0.1) × 108 M−1 for duramycin. Both binding constants were comparable indicating the similarity of affinity properties of nisin and duramycin towards β-LG. These results demonstrate that affinity capillary electrophoresis is a suitable method for characterizing the interaction between lantibiotics and β-LG.
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References
Kontopidis G, Holt C, Sawyer L (2004) J Dairy Sci 87:785–796
Qin BY, Bewley MC, Creamer LK, Baker HM, Baker EN, Jameson GB (1999) Prot. Sci. 8:75–83
Pérez MD, Calvo M (1995) J Dairy Sci 78(5):978–988
Jung G (1996) Combinatorial Peptides and Nonpeptide Libraries. VCH: Weinheim, Germany: 303
Järvinen K-M, Chatchatee P, Bardina L, Beyer K, Sampson HA (2001) Int. Arch. Of Allergy and Immun. 126(2):111–118
Willey JM, van der Donk WA (2007) Annu Rev Microbiol 61:477–501
Twomey D, Ross RP, Meaney B, Jill C (2002) Antoine van Leeuwenhoek. 82:165–185
Field D, Connor PMO, Cotter PD, Hill C, Ross RP (2008) Mol Micro 69(1):218–230
de Arauz LJ, Jozala AF, Mazzola PG, Penna TCV (2009) Trends Food Sci Technol 20:146–154
Delves-Broughton J (2005) Food Australia 57(12):525–527
Chen H, Hoover DG (2003) Comp Revs Food Sci Food Saf 2:82–100
Cotter PD, Hill C, Ross PR (2005) Curr Prot Pep Sci 6:61–75
Yada RY (2004) Proteins in food processing CRC Press, Boca Raton 402
El Deeb S, Wätzing H, El-Hady A (2013) Trends in. Anal Chem 48:112–131
Bowser MT, Chen DDY (1998) Anal Chem 70:3261–3270
Acknowledgments
The authors would like to thank Natural Science and Engineering Research Council (NSERC) of Canada for funding this study and Thompson Rivers University (TRU) for their support.
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Risley, J.M., Soliman, L.C. & Donkor, K.K. Characterization of the Interaction Between Lantibiotics, Nisin and Duramycin, and β-Lactoglobulin by Affinity Capillary Electrophoresis. Chromatographia 76, 1773–1777 (2013). https://doi.org/10.1007/s10337-013-2579-3
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DOI: https://doi.org/10.1007/s10337-013-2579-3
Keywords
- Capillary electrophoresis
- Lantibiotics
- Nisin
- Duramycin
- β-Lactoglobulin
- Binding constant