News Column

New Findings from Jagiellonian University Update Understanding of Iron-Binding Proteins

June 13, 2014

By a News Reporter-Staff News Editor at Science Letter -- Research findings on Proteins are discussed in a new report. According to news originating from Krakow, Poland, by NewsRx correspondents, research stated, "The previously published method allowing the separation of non-ferric (iron-free) and ferric (iron-saturated) forms of human serum transferrin via capillary electrophoresis has been further developed. Using a surface response methodology and a three-factorial Doehlert design we have established a new optimized running buffer composition: 50 mM Tris-HCl, pH 8.5, 22.5% (v/v) methanol, 17.5 mM SDS."

Our news journalists obtained a quote from the research from Jagiellonian University, "As a result, two previously unobserved monoferric forms of protein have been separated and identified, moreover, the loss of ferric ions from transferrin during electrophoretic separation has been considerably reduced by methanol, and the method selectivity has been yet increased resulting in a total separation of proteins exerting only subtle or none difference in mass-to-charge ratio. The new method has allowed us to monitor the gradual iron saturation of transferrin by mixing the iron-free form of protein with the buffers with different concentrations of ferric ions. It revealed continuously changing contribution of monoferric forms, characterized by different affinities of two existing iron binding sites on N- and C-lobes of protein, respectively. Afterwards, the similar experiment has been conducted on-line, i.e. inside the capillary, comparing the effectiveness of two possible modes of the reactant zones mixing: diffusion mediated and electrophoretically mediated ones."

According to the news editors, the research concluded: "Finally, the total time of separation has been decreased down to 4 min, taking the advantage from a short-end injection strategy and maintaining excellent selectivity."

For more information on this research see: Selective separation of ferric and non-ferric forms of human transferrin by capillary micellar electrokinetic chromatography. Journal of Chromatography A, 2014;1341():73-78. Journal of Chromatography A can be contacted at: Elsevier Science Bv, PO Box 211, 1000 Ae Amsterdam, Netherlands. (Elsevier -; Journal of Chromatography A -

The news correspondents report that additional information may be obtained from P. Nowak, Jagiellonian University, Fac Chem, Dept. of Inorgan Chem, PL-30060 Krakow, Poland. Additional authors for this research include K. Spiewak, J. Nowak, M. Brindell, M. Wozniakiewicz, G. Stochel and P. Koscielniak (see also Proteins).

Keywords for this news article include: Krakow, Poland, Europe, Transferrin, Beta-Globulins, Blood Proteins, Nanotechnology, Electrokinetics, Acute-Phase Proteins, Emerging Technologies, Iron-Binding Proteins

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Source: Science Letter

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