1
|
Oren A, Göker M. Validation List no. 217. Valid publication of new names and new combinations effectively published outside the IJSEM. Int J Syst Evol Microbiol 2024; 74:006275. [PMID: 38828845 PMCID: PMC11165881 DOI: 10.1099/ijsem.0.006275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2024] [Indexed: 06/05/2024] Open
Affiliation(s)
- Aharon Oren
- The Institute of Life Sciences, The Hebrew University of Jerusalem, The Edmond J. Safra Campus, 9190401 Jerusalem, Israel
| | - Markus Göker
- Leibniz Institute DSMZ – German Collection of Microorganisms and Cell Cultures, Inhoffenstrasse 7B, 38124 Braunschweig, Germany
| |
Collapse
|
2
|
Huang YY, Lv ZH, Zheng HZ, Zhu Q, Liu MT, Sang P, Wang F, Zhu D, Xian WD, Yin YR. Characterization of a thermophilic and glucose-tolerant GH1 β-glucosidase from hot springs and its prospective application in corn stover degradation. Front Microbiol 2023; 14:1286682. [PMID: 38179451 PMCID: PMC10764553 DOI: 10.3389/fmicb.2023.1286682] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2023] [Accepted: 12/05/2023] [Indexed: 01/06/2024] Open
Abstract
Introduction β-Glucosidase serves as the pivotal rate-limiting enzyme in the cellulose degradation process, facilitating the hydrolysis of cellobiose and cellooligosaccharides into glucose. However, the widespread application of numerous β-glucosidases is hindered by their limited thermostability and low glucose tolerance, particularly in elevated-temperature and high-glucose environments. Methods This study presents an analysis of a β-glucosidase gene belonging to the GH1 family, denoted lqbg8, which was isolated from the metagenomic repository of Hehua hot spring located in Tengchong, China. Subsequently, the gene was cloned and heterologously expressed in Escherichia coli BL21(DE3). Post expression, the recombinant β-glucosidase (LQBG8) underwent purification through a Ni affinity chromatography column, thereby enabling the in-depth exploration of its enzymatic properties. Results LQBG8 had an optimal temperature of 70°C and an optimum pH of 5.6. LQBG8 retained 100 and 70% of its maximum activity after 2-h incubation periods at 65°C and 70°C, respectively. Moreover, even following exposure to pH ranges of 3.0-10.0 for 24 h, LQBG8 retained approximately 80% of its initial activity. Notably, the enzymatic prowess of LQBG8 remained substantial at glucose concentrations of up to 3 M, with a retention of over 60% relative activity. The kinetic parameters of LQBG8 were characterized using cellobiose as substrate, with Km and Vmax values of 28 ± 1.9 mg/mL and 55 ± 3.2 μmol/min/mg, respectively. Furthermore, the introduction of LQBG8 (at a concentration of 0.03 mg/mL) into a conventional cellulase reaction system led to an impressive 43.7% augmentation in glucose yield from corn stover over a 24-h period. Molecular dynamics simulations offered valuable insights into LQBG8's thermophilic nature, attributing its robust stability to reduced fluctuations, conformational changes, and heightened structural rigidity in comparison to mesophilic β-glucosidases. Discussion In summation, its thermophilic, thermostable, and glucose-tolerant attributes, render LQBG8 ripe for potential applications across diverse domains encompassing food, feed, and the production of lignocellulosic ethanol.
Collapse
Affiliation(s)
- Yu-Ying Huang
- College of Agriculture and Biological Science, Dali University, Dali, China
| | - Zhi-Hua Lv
- College of Agriculture and Biological Science, Dali University, Dali, China
| | - Hong-Zhao Zheng
- College of Agriculture and Biological Science, Dali University, Dali, China
| | - Qian Zhu
- College of Agriculture and Biological Science, Dali University, Dali, China
| | - Meng-Ting Liu
- College of Agriculture and Biological Science, Dali University, Dali, China
- Key Laboratory of Bioinformatics and Computational Biology, Department of Education of Yunnan Province, Dali University, Dali, China
| | - Peng Sang
- College of Agriculture and Biological Science, Dali University, Dali, China
- Key Laboratory of Bioinformatics and Computational Biology, Department of Education of Yunnan Province, Dali University, Dali, China
| | - Fei Wang
- College of Agriculture and Biological Science, Dali University, Dali, China
| | - Dan Zhu
- College of Agriculture and Biological Science, Dali University, Dali, China
| | - Wen-Dong Xian
- Marine Microorganism Ecological and Application Lab, Marine Science and Technology College, Zhejiang Ocean University, Zhoushan, China
| | - Yi-Rui Yin
- College of Agriculture and Biological Science, Dali University, Dali, China
- Key Laboratory of Bioinformatics and Computational Biology, Department of Education of Yunnan Province, Dali University, Dali, China
- Cangshan Forest Ecosystem Observation and Research Station of Yunnan Province, Dali University, Dali, China
| |
Collapse
|
3
|
Oren A, Garrity GM. Valid publication of new names and new combinations effectively published outside the IJSEM. Int J Syst Evol Microbiol 2021; 71. [PMID: 34850678 DOI: 10.1099/ijsem.0.005096] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Affiliation(s)
- Aharon Oren
- The Institute of Life Sciences, The Hebrew University of Jerusalem, The Edmond J. Safra Campus, 9190401 Jerusalem, Israel
| | - George M Garrity
- Department of Microbiology & Molecular Genetics, Biomedical Physical Sciences, Michigan State University, East Lansing, MI 48824-4320, USA
| |
Collapse
|