Interaction of carbohydrates with alcohol dehydrogenase: Effect on enzyme activity

Swati B. Jadhav, Sandip B. Bankar, Tom Granström, Heikki Ojamo, Rekha S. Singhal, Shrikant A. Survase*

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

Alcohol dehydrogenase was covalently conjugated with three different oxidized carbohydrates i.e., glucose, starch and pectin. All the carbohydrates inhibited the enzyme. The inhibition was studied with respect to the inhibition rate constant, involvement of thiol groups in the binding, and structural changes in the enzyme. The enzyme activity decreased to half of its original activity at the concentration of 2 mg/mL of pectin, 4 mg/mL of glucose and 10 mg/mL of starch within 10 min at pH 7. This study showed oxidized pectin to be a potent inhibitor of alcohol dehydrogenase followed by glucose and starch. Along with the aldehyde-amino group interaction, thiol groups were also involved in the binding between alcohol dehydrogenase and carbohydrates. The structural changes occurring on binding of alcohol dehydrogenase with oxidized carbohydrates was also confirmed by fluorescence spectrophotometry. Oxidized carbohydrates could thus be used as potential inhibitors of alcohol dehydrogenase.
Original languageEnglish
Pages (from-to)252-256
Number of pages5
JournalJOURNAL OF BIOSCIENCE AND BIOENGINEERING
Volume120
Issue number3
DOIs
Publication statusPublished - 1 Sep 2015
MoE publication typeA1 Journal article-refereed

Keywords

  • Alcohol dehydrogenase
  • Carbohydrates
  • Covalent binding
  • Inhibition
  • Thiol groups

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