Analysis of the gene encoding cyclomaltodextrinase from alkalophilic Bacillus sp. I-5 and characterization of enzymatic properties

Tae Jip Kim, Jong Heon Shin, Jung Hwa Oh, Myo Jeong Kim, Soo Bok Lee, Sangryeol Ryu, Kisung Kwon, Jung Wan Kim, Eon Ho Choi, John F. Robyt, Kwan Hwa Park

Research output: Contribution to journalArticle

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Abstract

The gene encoding cyclomaltodextrinase (CDase) was cloned from alkalophilic Bacillus sp. I-5. The nucleotide sequence of the gene was determined and the physicochemical properties of the enzyme were investigated. The gene had an open reading frame of 559 amino acids with a predicted molecular weight of 64,884. The enzyme was purified to near homogeneity from Escherichia coli cells carrying a recombinant plasmid that contained the CDase gene. The enzyme hydrolyzed cyclomaltoheptaose (β-CD) 13 times better than starch and 33 times better than pullulan, and it had transglycosylation activity. The enzyme also hydrolyzed acarbose, a pseudotetrasaccharide inhibitor of glucosidases. The enzyme was stabilized by Ca2+ and the activity was increased more than twofold in the presence of 5 mM EDTA. The optimum temperature of the enzyme was elevated from 40 to 50°C by Ca2+ ion and the thermal activity was maintained more than 80% at 60°C in the presence of Ca2+. Comparison of known amino acid sequences of several amylolytic enzymes with cyclomaltodextrinase activity, site-directed mutagenesis of the enzyme, and substrate specificity of the enzyme imply that the region between the third and the fourth conserved regions of the enzyme may play an important role in binding and degradation of cyclomaltodextrin.

Original languageEnglish
Pages (from-to)221-227
Number of pages7
JournalArchives of Biochemistry and Biophysics
Volume353
Issue number2
DOIs
Publication statusPublished - 1998 May 15

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cyclomaltodextrinase
Gene encoding
Bacilli
Bacillus
Enzymes
Genes
Acarbose
Glucosidases
Amino Acids
Mutagenesis

All Science Journal Classification (ASJC) codes

  • Biophysics
  • Biochemistry
  • Molecular Biology

Cite this

Kim, Tae Jip ; Shin, Jong Heon ; Oh, Jung Hwa ; Kim, Myo Jeong ; Lee, Soo Bok ; Ryu, Sangryeol ; Kwon, Kisung ; Kim, Jung Wan ; Choi, Eon Ho ; Robyt, John F. ; Park, Kwan Hwa. / Analysis of the gene encoding cyclomaltodextrinase from alkalophilic Bacillus sp. I-5 and characterization of enzymatic properties. In: Archives of Biochemistry and Biophysics. 1998 ; Vol. 353, No. 2. pp. 221-227.
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abstract = "The gene encoding cyclomaltodextrinase (CDase) was cloned from alkalophilic Bacillus sp. I-5. The nucleotide sequence of the gene was determined and the physicochemical properties of the enzyme were investigated. The gene had an open reading frame of 559 amino acids with a predicted molecular weight of 64,884. The enzyme was purified to near homogeneity from Escherichia coli cells carrying a recombinant plasmid that contained the CDase gene. The enzyme hydrolyzed cyclomaltoheptaose (β-CD) 13 times better than starch and 33 times better than pullulan, and it had transglycosylation activity. The enzyme also hydrolyzed acarbose, a pseudotetrasaccharide inhibitor of glucosidases. The enzyme was stabilized by Ca2+ and the activity was increased more than twofold in the presence of 5 mM EDTA. The optimum temperature of the enzyme was elevated from 40 to 50°C by Ca2+ ion and the thermal activity was maintained more than 80{\%} at 60°C in the presence of Ca2+. Comparison of known amino acid sequences of several amylolytic enzymes with cyclomaltodextrinase activity, site-directed mutagenesis of the enzyme, and substrate specificity of the enzyme imply that the region between the third and the fourth conserved regions of the enzyme may play an important role in binding and degradation of cyclomaltodextrin.",
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Analysis of the gene encoding cyclomaltodextrinase from alkalophilic Bacillus sp. I-5 and characterization of enzymatic properties. / Kim, Tae Jip; Shin, Jong Heon; Oh, Jung Hwa; Kim, Myo Jeong; Lee, Soo Bok; Ryu, Sangryeol; Kwon, Kisung; Kim, Jung Wan; Choi, Eon Ho; Robyt, John F.; Park, Kwan Hwa.

In: Archives of Biochemistry and Biophysics, Vol. 353, No. 2, 15.05.1998, p. 221-227.

Research output: Contribution to journalArticle

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AU - Kim, Tae Jip

AU - Shin, Jong Heon

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AU - Kim, Myo Jeong

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