Enhancement of glucose isomerase activity by pretreatment with substrates prior to immobilization

Yoon Seok Song, Ji Eun Kim, Chulhwan Park, Seung Wook Kim

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11 Citations (Scopus)


To improve the activity of covalently immobilized glucose isomerase, the effects of glucose isomerase pretreatment with d-glucose or d-xylose prior to immobilization were investigated. Glucose isomerase was pretreated with d-glucose or d-xylose to prevent loss of activity, followed by immobilization on a silica gel surface. Pretreated immobilized glucose isomerase (PIGI) with 2.0M d-xylose (194.0 U/g matrix) had higher activity than PIGIs with d-glucose. The optimal temperature, reaction time, and agitation speed for glucose isomerase pretreatment were 60°C, 45 min, and 200 rpm, respectively. Consequently, the activity of PIGI with d-xylose was 254.9 U/g matrix, which is about 2.5 times higher than that of non-pretreated immobilized glucose isomerase (non-PIGI). PIGI also showed better reusability than non-PIGI, with 75.2% of its original activity being retained after 10 reuses.

Original languageEnglish
Pages (from-to)1096-1100
Number of pages5
JournalKorean Journal of Chemical Engineering
Issue number4
Publication statusPublished - 2011 Apr

Bibliographical note

Funding Information:
This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MEST) (No. 20100027563).


  • Glucose Isomerase
  • Immobilization
  • Pretreatment
  • Silica Gel
  • d-Xylose

ASJC Scopus subject areas

  • General Chemistry
  • General Chemical Engineering


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