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Estimation of acidity constants, ionic mobilities and charges of antimicrobial peptides by capillary electrophoresis

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388963%3A_____%2F16%3A00470552" target="_blank" >RIV/61388963:_____/16:00470552 - isvavai.cz</a>

  • Result on the web

    <a href="http://dx.doi.org/10.1002/elps.201600342" target="_blank" >http://dx.doi.org/10.1002/elps.201600342</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1002/elps.201600342" target="_blank" >10.1002/elps.201600342</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Estimation of acidity constants, ionic mobilities and charges of antimicrobial peptides by capillary electrophoresis

  • Original language description

    Capillary electrophoresis (CE) was employed for the determination of thermodynamic acidity constants (pK(a)) and actual ionic mobilities of polycationic antimicrobial peptides (AMPs). The effective electrophoretic mobilities of AMPs were measured by CE in a series of the background electrolytes within a wide pH range (2.00-12.25), at constant ionic strength (25mM) and ambient temperature, using polybrene coated fused silica capillaries to suppress sorption of cationic AMPs to the capillary wall. Eventually, Haarhoff-Van der Linde peak fitting function was used for the determination of correct migration times of some AMPs peaks that were distorted by electromigration dispersion. The measured effective mobilities were corrected to 25 degrees C. Mixed acidity constants, pK(a,i)(mix), and actual ionic mobilities, m(i), of AMPs were determined by the nonlinear regression analysis of pH dependence of their effective mobilities. The pK(a,i)(mix) values were recalculated to thermodynamic pK(a)s using the Debye-Huckel theory. Thermodynamic pK(a) of imidazolium group of histidine residues was found to be in the range 3.72-4.98, pK(a) of alpha-NH3+ group was in the range 6.14-6.93, and pK(a) of epsilon-NH3+ group of lysine spanned the interval 7.26-9.84, depending on the particular amino acid sequence of the AMPs. Actual ionic mobilities of AMPs with positive charges from one to six elementary units achieved values (9.8-36.5) x 10(-9) m(2)V(-1)s(-1).

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

  • CEP classification

    CB - Analytical chemistry, separation

  • OECD FORD branch

Result continuities

  • Project

    <a href="/en/project/GA15-01948S" target="_blank" >GA15-01948S: Capillary electromigration techniques using affinity selectors & smart polymers for analysis and properties and interactions studies of biomolecules</a><br>

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2016

  • Confidentiality

    S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Data specific for result type

  • Name of the periodical

    Electrophoresis

  • ISSN

    0173-0835

  • e-ISSN

  • Volume of the periodical

    37

  • Issue of the periodical within the volume

    23/24

  • Country of publishing house

    DE - GERMANY

  • Number of pages

    10

  • Pages from-to

    3186-3195

  • UT code for WoS article

    000392421400019

  • EID of the result in the Scopus database

    2-s2.0-84991671385