Chiral analysis of β‐alanyl‐d,l‐tyrosine and its derivatives and estimation of binding constants of their complexes with 2‐hydroxypropyl‐β‐cyclodextrin by capillary electrophoresis

Chiral CE methods were developed for the elucidation of l‐ or d‐configuration of tyrosine residue in antimicrobial dipeptide β‐alanyl‐tyrosine (β‐Ala‐Tyr) isolated from the hemolymph of larvae of fleshfly Neobellieria bullata and for the evaluation of enantiopurity of its synthetic isomers (β‐Ala‐d‐...

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Published inJournal of separation science Vol. 45; no. 17; pp. 3328 - 3338
Main Authors Sázelová, Petra, Šolínová, Veronika, Schimperková, Tereza, Jiráček, Jiří, Kašička, Václav
Format Journal Article
LanguageEnglish
Published Germany Wiley Subscription Services, Inc 01.09.2022
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ISSN1615-9306
1615-9314
1615-9314
DOI10.1002/jssc.202200158

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Abstract Chiral CE methods were developed for the elucidation of l‐ or d‐configuration of tyrosine residue in antimicrobial dipeptide β‐alanyl‐tyrosine (β‐Ala‐Tyr) isolated from the hemolymph of larvae of fleshfly Neobellieria bullata and for the evaluation of enantiopurity of its synthetic isomers (β‐Ala‐d‐Tyr and β‐Ala‐l‐Tyr), and enantiomers of their amidated and acetylated derivatives, β‐Ala‐d,l‐Tyr‐NH2 and N‐Ac‐β‐Ala‐d,l‐Tyr, respectively. Baseline separations were achieved for all three pairs of enantiomers: (i) for β‐Ala‐d,l‐Tyr in acidic background electrolyte composed of 32/50 mM tris(hydroxymethyl)aminomethane/H3PO4, pH 2.5, and 20 mg/mL 2‐hydroxypropyl‐β‐cyclodextrin as chiral selector; (ii) for β‐Ala‐d,l‐Tyr‐NH2 enantiomers in acidic background electrolyte consisting of 48/50 mM tris(hydroxymethyl)aminomethane/H3PO4, pH 3.5, and 30 mg/mL 2‐hydroxypropyl‐β‐cyclodextrin; and (iii) for enantiomers of N‐Ac‐β‐Ala‐d,l‐Tyr in alkaline background electrolyte composed of 50/49 mM Na2B4O7/NaOH, pH 10.5, and 60 mg/mL 2‐hydroxypropyl‐β‐cyclodextrin. From CE analyses of mixed samples of isolated β‐Ala‐Tyr and synthetic standards β‐Ala‐l‐Tyr and β‐Ala‐d‐Tyr, it turned out that isolated β‐Ala‐Tyr was pure l‐enantiomer. In addition, the average apparent binding constants, Kb, and average actual ionic mobilities of the complexes of β‐Ala‐d,l‐Tyr and its above derivatives with 2‐hydroxypropyl‐β‐cyclodextrin were determined. These complexes were weak, with Kb values ranging from 11.2 to 79.1 L/mol. Their cationic mobilities were equal to (5.6–9.2) × 10–9 m2/V/s, and anionic mobilities to (‐1.3–1.6) × 10–9 m2/V/s.
AbstractList Chiral CE methods were developed for the elucidation of l ‐ or d ‐configuration of tyrosine residue in antimicrobial dipeptide β‐alanyl‐tyrosine (β‐Ala‐Tyr) isolated from the hemolymph of larvae of fleshfly Neobellieria bullata and for the evaluation of enantiopurity of its synthetic isomers (β ‐ Ala ‐d‐ Tyr and β ‐ Ala‐ l ‐Tyr), and enantiomers of their amidated and acetylated derivatives, β‐Ala‐ d , l ‐Tyr‐NH 2 and N ‐Ac‐β‐Ala‐ d , l ‐Tyr, respectively. Baseline separations were achieved for all three pairs of enantiomers: (i) for β‐Ala‐ d , l ‐Tyr in acidic background electrolyte composed of 32/50 mM tris(hydroxymethyl)aminomethane/H 3 PO 4 , pH 2.5, and 20 mg/mL 2‐hydroxypropyl‐β‐cyclodextrin as chiral selector; (ii) for β‐Ala‐ d,l ‐Tyr‐NH 2 enantiomers in acidic background electrolyte consisting of 48/50 mM tris(hydroxymethyl)aminomethane/H 3 PO 4 , pH 3.5, and 30 mg/mL 2‐hydroxypropyl‐β‐cyclodextrin; and (iii) for enantiomers of N ‐Ac‐β‐Ala‐ d , l ‐Tyr in alkaline background electrolyte composed of 50/49 mM Na 2 B 4 O 7 /NaOH, pH 10.5, and 60 mg/mL 2‐hydroxypropyl‐β‐cyclodextrin. From CE analyses of mixed samples of isolated β‐Ala‐Tyr and synthetic standards β‐Ala‐ l ‐Tyr and β‐Ala‐ d ‐Tyr, it turned out that isolated β‐Ala‐Tyr was pure l ‐enantiomer. In addition, the average apparent binding constants, K b , and average actual ionic mobilities of the complexes of β‐Ala‐ d , l ‐Tyr and its above derivatives with 2‐hydroxypropyl‐β‐cyclodextrin were determined. These complexes were weak, with K b values ranging from 11.2 to 79.1 L/mol. Their cationic mobilities were equal to (5.6–9.2) × 10 –9 m 2 /V/s, and anionic mobilities to (‐1.3–1.6) × 10 –9 m 2 /V/s.
Chiral CE methods were developed for the elucidation of l- or d-configuration of tyrosine residue in antimicrobial dipeptide β-alanyl-tyrosine (β-Ala-Tyr) isolated from the hemolymph of larvae of fleshfly Neobellieria bullata and for the evaluation of enantiopurity of its synthetic isomers (β-Ala-d-Tyr and β-Ala-l-Tyr), and enantiomers of their amidated and acetylated derivatives, β-Ala-d,l-Tyr-NH2 and N-Ac-β-Ala-d,l-Tyr, respectively. Baseline separations were achieved for all three pairs of enantiomers: (i) for β-Ala-d,l-Tyr in acidic background electrolyte composed of 32/50 mM tris(hydroxymethyl)aminomethane/H3 PO4 , pH 2.5, and 20 mg/mL 2-hydroxypropyl-β-cyclodextrin as chiral selector; (ii) for β-Ala-d,l-Tyr-NH2 enantiomers in acidic background electrolyte consisting of 48/50 mM tris(hydroxymethyl)aminomethane/H3 PO4 , pH 3.5, and 30 mg/mL 2-hydroxypropyl-β-cyclodextrin; and (iii) for enantiomers of N-Ac-β-Ala-d,l-Tyr in alkaline background electrolyte composed of 50/49 mM Na2 B4 O7 /NaOH, pH 10.5, and 60 mg/mL 2-hydroxypropyl-β-cyclodextrin. From CE analyses of mixed samples of isolated β-Ala-Tyr and synthetic standards β-Ala-l-Tyr and β-Ala-d-Tyr, it turned out that isolated β-Ala-Tyr was pure l-enantiomer. In addition, the average apparent binding constants, Kb , and average actual ionic mobilities of the complexes of β-Ala-d,l-Tyr and its above derivatives with 2-hydroxypropyl-β-cyclodextrin were determined. These complexes were weak, with Kb values ranging from 11.2 to 79.1 L/mol. Their cationic mobilities were equal to (5.6-9.2) × 10-9 m2 /V/s, and anionic mobilities to (-1.3-1.6) × 10-9 m2 /V/s.Chiral CE methods were developed for the elucidation of l- or d-configuration of tyrosine residue in antimicrobial dipeptide β-alanyl-tyrosine (β-Ala-Tyr) isolated from the hemolymph of larvae of fleshfly Neobellieria bullata and for the evaluation of enantiopurity of its synthetic isomers (β-Ala-d-Tyr and β-Ala-l-Tyr), and enantiomers of their amidated and acetylated derivatives, β-Ala-d,l-Tyr-NH2 and N-Ac-β-Ala-d,l-Tyr, respectively. Baseline separations were achieved for all three pairs of enantiomers: (i) for β-Ala-d,l-Tyr in acidic background electrolyte composed of 32/50 mM tris(hydroxymethyl)aminomethane/H3 PO4 , pH 2.5, and 20 mg/mL 2-hydroxypropyl-β-cyclodextrin as chiral selector; (ii) for β-Ala-d,l-Tyr-NH2 enantiomers in acidic background electrolyte consisting of 48/50 mM tris(hydroxymethyl)aminomethane/H3 PO4 , pH 3.5, and 30 mg/mL 2-hydroxypropyl-β-cyclodextrin; and (iii) for enantiomers of N-Ac-β-Ala-d,l-Tyr in alkaline background electrolyte composed of 50/49 mM Na2 B4 O7 /NaOH, pH 10.5, and 60 mg/mL 2-hydroxypropyl-β-cyclodextrin. From CE analyses of mixed samples of isolated β-Ala-Tyr and synthetic standards β-Ala-l-Tyr and β-Ala-d-Tyr, it turned out that isolated β-Ala-Tyr was pure l-enantiomer. In addition, the average apparent binding constants, Kb , and average actual ionic mobilities of the complexes of β-Ala-d,l-Tyr and its above derivatives with 2-hydroxypropyl-β-cyclodextrin were determined. These complexes were weak, with Kb values ranging from 11.2 to 79.1 L/mol. Their cationic mobilities were equal to (5.6-9.2) × 10-9 m2 /V/s, and anionic mobilities to (-1.3-1.6) × 10-9 m2 /V/s.
Chiral CE methods were developed for the elucidation of l‐ or d‐configuration of tyrosine residue in antimicrobial dipeptide β‐alanyl‐tyrosine (β‐Ala‐Tyr) isolated from the hemolymph of larvae of fleshfly Neobellieria bullata and for the evaluation of enantiopurity of its synthetic isomers (β‐Ala‐d‐Tyr and β‐Ala‐l‐Tyr), and enantiomers of their amidated and acetylated derivatives, β‐Ala‐d,l‐Tyr‐NH2 and N‐Ac‐β‐Ala‐d,l‐Tyr, respectively. Baseline separations were achieved for all three pairs of enantiomers: (i) for β‐Ala‐d,l‐Tyr in acidic background electrolyte composed of 32/50 mM tris(hydroxymethyl)aminomethane/H3PO4, pH 2.5, and 20 mg/mL 2‐hydroxypropyl‐β‐cyclodextrin as chiral selector; (ii) for β‐Ala‐d,l‐Tyr‐NH2 enantiomers in acidic background electrolyte consisting of 48/50 mM tris(hydroxymethyl)aminomethane/H3PO4, pH 3.5, and 30 mg/mL 2‐hydroxypropyl‐β‐cyclodextrin; and (iii) for enantiomers of N‐Ac‐β‐Ala‐d,l‐Tyr in alkaline background electrolyte composed of 50/49 mM Na2B4O7/NaOH, pH 10.5, and 60 mg/mL 2‐hydroxypropyl‐β‐cyclodextrin. From CE analyses of mixed samples of isolated β‐Ala‐Tyr and synthetic standards β‐Ala‐l‐Tyr and β‐Ala‐d‐Tyr, it turned out that isolated β‐Ala‐Tyr was pure l‐enantiomer. In addition, the average apparent binding constants, Kb, and average actual ionic mobilities of the complexes of β‐Ala‐d,l‐Tyr and its above derivatives with 2‐hydroxypropyl‐β‐cyclodextrin were determined. These complexes were weak, with Kb values ranging from 11.2 to 79.1 L/mol. Their cationic mobilities were equal to (5.6–9.2) × 10–9 m2/V/s, and anionic mobilities to (‐1.3–1.6) × 10–9 m2/V/s.
Chiral CE methods were developed for the elucidation of l- or d-configuration of tyrosine residue in antimicrobial dipeptide β-alanyl-tyrosine (β-Ala-Tyr) isolated from the hemolymph of larvae of fleshfly Neobellieria bullata and for the evaluation of enantiopurity of its synthetic isomers (β-Ala-d-Tyr and β-Ala-l-Tyr), and enantiomers of their amidated and acetylated derivatives, β-Ala-d,l-Tyr-NH and N-Ac-β-Ala-d,l-Tyr, respectively. Baseline separations were achieved for all three pairs of enantiomers: (i) for β-Ala-d,l-Tyr in acidic background electrolyte composed of 32/50 mM tris(hydroxymethyl)aminomethane/H PO , pH 2.5, and 20 mg/mL 2-hydroxypropyl-β-cyclodextrin as chiral selector; (ii) for β-Ala-d,l-Tyr-NH enantiomers in acidic background electrolyte consisting of 48/50 mM tris(hydroxymethyl)aminomethane/H PO , pH 3.5, and 30 mg/mL 2-hydroxypropyl-β-cyclodextrin; and (iii) for enantiomers of N-Ac-β-Ala-d,l-Tyr in alkaline background electrolyte composed of 50/49 mM Na B O /NaOH, pH 10.5, and 60 mg/mL 2-hydroxypropyl-β-cyclodextrin. From CE analyses of mixed samples of isolated β-Ala-Tyr and synthetic standards β-Ala-l-Tyr and β-Ala-d-Tyr, it turned out that isolated β-Ala-Tyr was pure l-enantiomer. In addition, the average apparent binding constants, K , and average actual ionic mobilities of the complexes of β-Ala-d,l-Tyr and its above derivatives with 2-hydroxypropyl-β-cyclodextrin were determined. These complexes were weak, with K values ranging from 11.2 to 79.1 L/mol. Their cationic mobilities were equal to (5.6-9.2) × 10 m /V/s, and anionic mobilities to (-1.3-1.6) × 10 m /V/s.
Chiral CE methods were developed for the elucidation of l‐ or d‐configuration of tyrosine residue in antimicrobial dipeptide β‐alanyl‐tyrosine (β‐Ala‐Tyr) isolated from the hemolymph of larvae of fleshfly Neobellieria bullata and for the evaluation of enantiopurity of its synthetic isomers (β‐Ala‐d‐Tyr and β‐Ala‐l‐Tyr), and enantiomers of their amidated and acetylated derivatives, β‐Ala‐d,l‐Tyr‐NH₂ and N‐Ac‐β‐Ala‐d,l‐Tyr, respectively. Baseline separations were achieved for all three pairs of enantiomers: (i) for β‐Ala‐d,l‐Tyr in acidic background electrolyte composed of 32/50 mM tris(hydroxymethyl)aminomethane/H₃PO₄, pH 2.5, and 20 mg/mL 2‐hydroxypropyl‐β‐cyclodextrin as chiral selector; (ii) for β‐Ala‐d,l‐Tyr‐NH₂ enantiomers in acidic background electrolyte consisting of 48/50 mM tris(hydroxymethyl)aminomethane/H₃PO₄, pH 3.5, and 30 mg/mL 2‐hydroxypropyl‐β‐cyclodextrin; and (iii) for enantiomers of N‐Ac‐β‐Ala‐d,l‐Tyr in alkaline background electrolyte composed of 50/49 mM Na₂B₄O₇/NaOH, pH 10.5, and 60 mg/mL 2‐hydroxypropyl‐β‐cyclodextrin. From CE analyses of mixed samples of isolated β‐Ala‐Tyr and synthetic standards β‐Ala‐l‐Tyr and β‐Ala‐d‐Tyr, it turned out that isolated β‐Ala‐Tyr was pure l‐enantiomer. In addition, the average apparent binding constants, Kb, and average actual ionic mobilities of the complexes of β‐Ala‐d,l‐Tyr and its above derivatives with 2‐hydroxypropyl‐β‐cyclodextrin were determined. These complexes were weak, with Kb values ranging from 11.2 to 79.1 L/mol. Their cationic mobilities were equal to (5.6–9.2) × 10–⁹ m²/V/s, and anionic mobilities to (‐1.3–1.6) × 10–⁹ m²/V/s.
Chiral CE methods were developed for the elucidation of l‐ or d‐configuration of tyrosine residue in antimicrobial dipeptide β‐alanyl‐tyrosine (β‐Ala‐Tyr) isolated from the hemolymph of larvae of fleshfly Neobellieria bullata and for the evaluation of enantiopurity of its synthetic isomers (β‐Ala‐d‐Tyr and β‐Ala‐l‐Tyr), and enantiomers of their amidated and acetylated derivatives, β‐Ala‐d,l‐Tyr‐NH2 and N‐Ac‐β‐Ala‐d,l‐Tyr, respectively. Baseline separations were achieved for all three pairs of enantiomers: (i) for β‐Ala‐d,l‐Tyr in acidic background electrolyte composed of 32/50 mM tris(hydroxymethyl)aminomethane/H3PO4, pH 2.5, and 20 mg/mL 2‐hydroxypropyl‐β‐cyclodextrin as chiral selector; (ii) for β‐Ala‐d,l‐Tyr‐NH2 enantiomers in acidic background electrolyte consisting of 48/50 mM tris(hydroxymethyl)aminomethane/H3PO4, pH 3.5, and 30 mg/mL 2‐hydroxypropyl‐β‐cyclodextrin; and (iii) for enantiomers of N‐Ac‐β‐Ala‐d,l‐Tyr in alkaline background electrolyte composed of 50/49 mM Na2B4O7/NaOH, pH 10.5, and 60 mg/mL 2‐hydroxypropyl‐β‐cyclodextrin. From CE analyses of mixed samples of isolated β‐Ala‐Tyr and synthetic standards β‐Ala‐l‐Tyr and β‐Ala‐d‐Tyr, it turned out that isolated β‐Ala‐Tyr was pure l‐enantiomer. In addition, the average apparent binding constants, Kb, and average actual ionic mobilities of the complexes of β‐Ala‐d,l‐Tyr and its above derivatives with 2‐hydroxypropyl‐β‐cyclodextrin were determined. These complexes were weak, with Kb values ranging from 11.2 to 79.1 L/mol. Their cationic mobilities were equal to (5.6–9.2) × 10–9 m2/V/s, and anionic mobilities to (‐1.3–1.6) × 10–9 m2/V/s.
Author Schimperková, Tereza
Jiráček, Jiří
Šolínová, Veronika
Kašička, Václav
Sázelová, Petra
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IsScholarly true
Issue 17
Keywords enantioseparation
2-hydroxypropyl-β-cyclodextrin
chiral separation
capillary electrophoresis
Binding constant
β-alanyl-tyrosine
Language English
License 2022 Wiley-VCH GmbH.
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Snippet Chiral CE methods were developed for the elucidation of l‐ or d‐configuration of tyrosine residue in antimicrobial dipeptide β‐alanyl‐tyrosine (β‐Ala‐Tyr)...
Chiral CE methods were developed for the elucidation of l ‐ or d ‐configuration of tyrosine residue in antimicrobial dipeptide β‐alanyl‐tyrosine (β‐Ala‐Tyr)...
Chiral CE methods were developed for the elucidation of l- or d-configuration of tyrosine residue in antimicrobial dipeptide β-alanyl-tyrosine (β-Ala-Tyr)...
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SubjectTerms 2‐hydroxypropyl‐β‐cyclodextrin
Antiinfectives and antibacterials
Binding
Binding constant
capillary electrophoresis
chiral separation
Cyclodextrins
dipeptides
Electrolytes
Electrophoresis
Enantiomers
enantioseparation
hemolymph
Larvae
Sarcophaga bullata
separation
Tyrosine
β‐alanyl‐tyrosine
Title Chiral analysis of β‐alanyl‐d,l‐tyrosine and its derivatives and estimation of binding constants of their complexes with 2‐hydroxypropyl‐β‐cyclodextrin by capillary electrophoresis
URI https://onlinelibrary.wiley.com/doi/abs/10.1002%2Fjssc.202200158
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