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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Ko, Jin-A Nam, Seung-Hee Kim, Doman Lee, Jun-Ho Kim, Young-Min |
| Description | Author Affiliation: Ko JA ( Eco-Friendly Bio-material Research Center, Korea Research Institute of Bioscience and Biotechnology, Jeongeup 56212, Republic of Korea.); Nam SH ( Department of Food Science & Technology and BK21 Plus Program, Bio-enery Research Center, Chonnam Natioanl University, Gwangju 61186, Republic of Korea.); Kim D ( Research Institute of Food Industrialization, Institutes of Green Bio Science & Technology, Seoul National University, Pyeongchang 25354, Republic of Korea.); Lee JH ( Department of Biotechnology, Chonnam National University, Gwangju 61186, Republic of Korea.); Kim YM ( Department of Food Science & Technology and BK21 Plus Program, Bio-enery Research Center, Chonnam Natioanl University, Gwangju 61186, Republic of Korea.) |
| Abstract | A novel endodextranase isolated from Paenibacillus sp. was found to produce isomaltotetraose and small amounts of cycloisomaltooligosaccharides with a degree of polymerization of 7-14 from dextran. To determine the active site, the enzyme was modified with 1-ethyl-3-[3- (dimethylamino)-propyl]-carbodiimide (EDC) and -epoxyalkyl -glucosides (EAGs), an affinity labeling reagent. The inactivation followed pseudo first-order kinetics. Kinetic analysis and chemical modification using EDC and EAGs indicated that carboxyl groups are essential for the enzymatic activity. Three Asp and one Glu residues were identified as candidate catalytic amino acids, since these residues are completely conserved across the GH family of 66 enzymes. Replacement of Asp189, Asp340, or Glu412 completely abolished the enzyme activity, indicating that these residues are essential for catalytic activity. |
| File Format | HTM / HTML |
| ISSN | 10177825 |
| e-ISSN | 17388872 |
| Journal | Journal of Microbiology and Biotechnology |
| Issue Number | 5 |
| Volume Number | 26 |
| Language | English |
| Publisher | Korean Society for Microbiology and Biotechnology |
| Publisher Date | 2016-05-28 |
| Publisher Place | Korea (South) |
| Access Restriction | Open |
| Subject Keyword | Discipline Microbiology Discipline Biotechnology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Medicine Applied Microbiology and Biotechnology Biotechnology |
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