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著作: 峯 大典/[水口 仁志]/[髙栁 俊夫]/Kinetic analyses of two-steps oxidation from L-tyrosine to L-dopaquinone with tyrosinase by capillary electrophoresis/dynamic frontal analysis/[Analytical Biochemistry: Methods in the Biological Sciences]

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EID
389408
EOID
1117498
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0
LastModified
2024年8月29日(木) 15:40:17
Operator
髙橋 ひとみ
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TRUE
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Owner
髙栁 俊夫
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種別 必須 学術論文(審査論文)
言語 必須 英語
招待 推奨
審査 推奨 Peer Review
カテゴリ 推奨
共著種別 推奨 単独著作(徳島大学内の単一の研究グループ(研究室等)内の研究 (単著も含む))
学究種別 推奨
組織 推奨
著者 必須
  1. (英) Mine Masanori / (日) 峯 大典 / (読) みね まさのり
    役割 任意
    貢献度 任意
    学籍番号 推奨 ****
  2. 水口 仁志([徳島大学.大学院社会産業理工学研究部.理工学域.応用化学系.物質機能化学分野]/[徳島大学.理工学部.理工学科.応用化学システムコース.物質機能化学講座])
    役割 任意
    貢献度 任意
    学籍番号 推奨
  3. 髙栁 俊夫([徳島大学.大学院社会産業理工学研究部.理工学域.応用化学系.物質機能化学分野]/[徳島大学.理工学部.理工学科.応用化学システムコース.物質機能化学講座])
    役割 任意
    貢献度 任意
    学籍番号 推奨
題名 必須

(英) Kinetic analyses of two-steps oxidation from L-tyrosine to L-dopaquinone with tyrosinase by capillary electrophoresis/dynamic frontal analysis

副題 任意
要約 任意

(英) Tyrosinase catalyzes the oxidation of l-tyrosine in two stages to produce l-dopa and l-dopaquinone stepwise, and l-dopaquinone is subsequently converted to dopachrome. Most of the conventional analyses subjected only one-step reaction from l-tyrosine to l-dopa or from l-dopa to l-dopaquinone. In this study, kinetic analyses of two-steps oxidation of l-tyrosine with tyrosinase were made by capillary electrophoresis/dynamic frontal analysis (CE/DFA). When l-dopa was introduced into a capillary as a sample plug in a CE/DFA format, the enzymatic oxidation continuously occurred during the electrophoresis, and the product l-dopaquinone was subsequently converted to dopachrome which was detected as a plateau signal. A Michaelis-Menten constant of the second-step kinetic reaction, K, was determined as 0.45 ± 0.03 mmol L. In the analysis of the first-step kinetic reaction from l-tyrosine to l-dopa, l-dopa was not resolved by CE/DFA because both l-tyrosine and l-dopa are electrically neutral. The l-dopa formed and co-migrated at the l-tyrosine zone was calibrated beforehand with the final product of dopachrome detected as a plateau signal. Constantly formed l-dopa was successfully detected as a plateau signal of dopachrome, and a Michaelis-Menten constant of K was also determined as 0.061 ± 0.009 mmol L by the CE/DFA. CE/DFA is applicable to two-steps enzymatic reactions.

キーワード 推奨
  1. (英) Benzoquinones
  2. (英) Dihydroxyphenylalanine
  3. (英) Electrophoresis, Capillary
  4. (英) Kinetics
  5. (英) Monophenol Monooxygenase
  6. (英) Tyrosine
発行所 推奨 Elsevier Science
誌名 必須 Analytical Biochemistry: Methods in the Biological Sciences([Elsevier Science])
(pISSN: 0003-2697, eISSN: 1096-0309)
ISSN 任意 0003-2697
ISSN: 0003-2697 (pISSN: 0003-2697, eISSN: 1096-0309)
Title: Analytical biochemistry
Title(ISO): Anal Biochem
Publisher: Academic Press Inc.
 (NLM Catalog  (Scopus  (CrossRef (Scopus information is found. [need login])
必須 655
必須 ---
必須 114856 114856
都市 任意
年月日 必須 2022年 10月 15日
URL 任意
DOI 任意 10.1016/j.ab.2022.114856    (→Scopusで検索)
PMID 任意 35964734    (→Scopusで検索)
CRID 任意
WOS 任意
Scopus 任意
評価値 任意
被引用数 任意
指導教員 推奨
備考 任意
  1. (英) Article.ELocationID: 10.1016/j.ab.2022.114856

  2. (英) Article.ELocationID: S0003-2697(22)00316-5

  3. (英) Article.PublicationTypeList.PublicationType: Journal Article

  4. (英) Article.PublicationTypeList.PublicationType: Research Support, Non-U.S. Gov't

  5. (英) KeywordList.Keyword: Capillary electrophoresis

  6. (英) KeywordList.Keyword: Dynamic frontal analysis

  7. (英) KeywordList.Keyword: Kinetic analysis

  8. (英) KeywordList.Keyword: Two-steps oxidation

  9. (英) KeywordList.Keyword: Tyrosinase

  10. (英) CoiStatement: Declaration of competing interest The authors declare that they have no conflict of interest.