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Sarian FD, Janeček Š, Pijning T, Ihsanawati, Nurachman Z, Radjasa OK, Dijkhuizen L, Natalia D, van der Maarel MJEC. A new group of glycoside hydrolase family 13 α-amylases with an aberrant catalytic triad. Sci Rep 2017; 7:44230. [PMID: 28287181 PMCID: PMC5347038 DOI: 10.1038/srep44230] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 01/31/2017] [Indexed: 11/09/2022] Open
Abstract
α-Amylases are glycoside hydrolase enzymes that act on the α(1→4) glycosidic linkages in glycogen, starch, and related α-glucans, and are ubiquitously present in Nature. Most α-amylases have been classified in glycoside hydrolase family 13 with a typical (β/α)8-barrel containing two aspartic acid and one glutamic acid residue that play an essential role in catalysis. An atypical α-amylase (BmaN1) with only two of the three invariant catalytic residues present was isolated from Bacillus megaterium strain NL3, a bacterial isolate from a sea anemone of Kakaban landlocked marine lake, Derawan Island, Indonesia. In BmaN1 the third residue, the aspartic acid that acts as the transition state stabilizer, was replaced by a histidine. Three-dimensional structure modeling of the BmaN1 amino acid sequence confirmed the aberrant catalytic triad. Glucose and maltose were found as products of the action of the novel α-amylase on soluble starch, demonstrating that it is active in spite of the peculiar catalytic triad. This novel BmaN1 α-amylase is part of a group of α-amylases that all have this atypical catalytic triad, consisting of aspartic acid, glutamic acid and histidine. Phylogenetic analysis showed that this group of α-amylases comprises a new subfamily of the glycoside hydrolase family 13.
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Affiliation(s)
- Fean D Sarian
- Biochemistry Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia.,Aquatic Biotechnology and Bioproduct Engineering, Engineering and Technology institute Groningen (ENTEG), University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
| | - Štefan Janeček
- Laboratory of Protein Evolution, Institute of Molecular Biology, Slovak Academy of Sciences, Dubravska cesta 21, SK-84551 Bratislava, Slovakia.,Department of Biology, Faculty of Natural Sciences, University of SS. Cyril and Mehtodius, Nam. J. Herdu 2, SK-91701 Trnava, Slovakia
| | - Tjaard Pijning
- X-Ray Crystallography, Groningen Biomolecular Sciences and Biotechnology Institute (GBB), University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - Ihsanawati
- Biochemistry Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia
| | - Zeily Nurachman
- Biochemistry Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia
| | - Ocky K Radjasa
- Department of Marine Science, Faculty of Fishery and Marine Science, Diponegoro University, Semarang 50275, Central Java, Indonesia
| | - Lubbert Dijkhuizen
- Microbial Physiology, Groningen Biomolecular Sciences and Biotechnology Institute (GBB), University of Groningen, Nijenborgh 7, 9747 AG Groningen, The Netherlands
| | - Dessy Natalia
- Biochemistry Research Division, Faculty of Mathematics and Natural Sciences, Institut Teknologi Bandung, Jl. Ganesha 10, Bandung, 40132, Indonesia
| | - Marc J E C van der Maarel
- Aquatic Biotechnology and Bioproduct Engineering, Engineering and Technology institute Groningen (ENTEG), University of Groningen, Nijenborgh 4, 9747 AG Groningen, The Netherlands
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Wang C, Wang Q, Liao S, He B, Huang R. Thermal stability and activity improvements of a Ca-independent α-amylase fromBacillus subtilisCN7 by C-terminal truncation and hexahistidine-tag fusion. Biotechnol Appl Biochem 2014; 61:93-100. [DOI: 10.1002/bab.1150] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2013] [Accepted: 08/21/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Chenghua Wang
- College of Biotechnology and Pharmaceutical Engineering; Nanjing University of Technology; Nanjing People's Republic of China
- State Key Laboratory of Non-Food Biomass and Enzyme Technology; National Engineering Research Center for Non-Food Biorefinery; Guangxi Key Laboratory of Biorefinery; Guangxi Academy of Sciences; Nanning People's Republic of China
| | - Qingyan Wang
- State Key Laboratory of Non-Food Biomass and Enzyme Technology; National Engineering Research Center for Non-Food Biorefinery; Guangxi Key Laboratory of Biorefinery; Guangxi Academy of Sciences; Nanning People's Republic of China
| | - Siming Liao
- State Key Laboratory of Non-Food Biomass and Enzyme Technology; National Engineering Research Center for Non-Food Biorefinery; Guangxi Key Laboratory of Biorefinery; Guangxi Academy of Sciences; Nanning People's Republic of China
| | - Bingfang He
- College of Biotechnology and Pharmaceutical Engineering; Nanjing University of Technology; Nanjing People's Republic of China
| | - Ribo Huang
- College of Biotechnology and Pharmaceutical Engineering; Nanjing University of Technology; Nanjing People's Republic of China
- State Key Laboratory of Non-Food Biomass and Enzyme Technology; National Engineering Research Center for Non-Food Biorefinery; Guangxi Key Laboratory of Biorefinery; Guangxi Academy of Sciences; Nanning People's Republic of China
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