1
|
Characterization of a novel type of glycogen-degrading amylopullulanase from Lactobacillus crispatus. Appl Microbiol Biotechnol 2022; 106:4053-4064. [PMID: 35612627 DOI: 10.1007/s00253-022-11975-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 04/21/2022] [Accepted: 05/09/2022] [Indexed: 11/02/2022]
Abstract
Glycogen is one of the major carbohydrates utilized by the human vaginal microbiota, which is commonly dominated by Lactobacillus, especially L. crispatus. An in silico analysis predicted that a type I pullulanase was involved in glycogen degradation in L. crispatus. The biochemical and genetic properties of the pullulanase still need to be determined. Here, we de novo identified the glycogen (Glg)-utilization enzyme (named GlgU) from L. crispatus through a biochemical assay. GlgU was optimally active at acidic pH, approximately 4.0 ~ 4.5, and was able to hydrolyze glycogen into low-molecular-weight malto-oligosaccharides. Actually, GlgU was a type II pullulanase (amylopullulanase) with just one catalytic domain that possessed substrate specificity toward both α-1,4 and α-1,6-glucosidic bonds. Phylogenetically, GlgU was obviously divergent from the known amylases and pullulanases (including amylopullulanases) in lactobacilli. In addition, we confirmed the catalytic activity of glgU in a nonglycogen-utilizing lactobacilli strain, demonstrating the essential role of glgU in glycogen metabolism. Overall, this study characterized a novel type of amylopullulanases, contributing to the knowledge of the glycogen utilization mechanism of the dominant species of human vaginal microbiota. KEY POINTS: • GlgU was a type II pullulanase, not a type I pullulanase predicted before. • GlgU was able to completely hydrolyze glycogen into malto-oligosaccharides. • GlgU played a key role in the metabolism of extracellular glycogen.
Collapse
|
2
|
Monica P, Mutturi S, Kapoor M. Truncation of C-terminal amino acids of GH26 endo-mannanase (ManB-1601) affects biochemical properties and stability against anionic surfactants. Enzyme Microb Technol 2022; 157:110031. [DOI: 10.1016/j.enzmictec.2022.110031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 02/18/2022] [Accepted: 03/10/2022] [Indexed: 11/16/2022]
|
3
|
Ni D, Kırtel O, Yin D, Xu W, Chen Q, Öner ET, Mu W. Improving the catalytic behaviors of Lactobacillus-derived fructansucrases by truncation strategies. Enzyme Microb Technol 2021; 149:109857. [PMID: 34311894 DOI: 10.1016/j.enzmictec.2021.109857] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 06/04/2021] [Accepted: 06/21/2021] [Indexed: 01/17/2023]
Abstract
Fructansucrases (FSs), including inulosucrase (IS) and levansucrase (LS), are the members of the Glycoside Hydrolase family 68 (GH68) enzymes. IS and LS catalyze the polymerization of the fructosyl moiety from sucrose to inulin- and levan-type fructans, respectively. Lactobacillus-derived FSs have relatively extended N- and C-terminal sequences. However, the functional roles of these sequences in their enzymatic properties and fructan biosynthesis remain largely unknown. Limosilactobacillus reuteri (basionym: Lactobacillus reuteri) 121 could produce both IS and LS, abbreviated as Lare121-IS and Lare121-LS, respectively. In this study, it was found that the terminal truncation displayed an obvious effect on their activities and the N-terminal truncated variants, Lare121-ISΔ177-701 and Lare121-LSΔ154-686, displayed the highest activities. Melting temperature (Tm) and the thermostability at 50 °C were measured to evaluate the stability of various truncated versions, revealing the different effects of N-terminal on the stability. The average molecular weight and polymerization degree of the fructans produced by different truncated variants did not change considerably, indicating that N-terminal truncation had low influence on fructan biosynthesis. In addition, it was found that N-terminal truncation could also improve the activity of other reported FSs from Lactobacillus species.
Collapse
Affiliation(s)
- Dawei Ni
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Onur Kırtel
- IBSB-Industrial Biotechnology and Systems Biology Research Group, Department of Bioengineering, Marmara University, Göztepe Campus, Istanbul, Turkey
| | - Dejing Yin
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, Jiangsu, China
| | - Wei Xu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Qiuming Chen
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China
| | - Ebru Toksoy Öner
- IBSB-Industrial Biotechnology and Systems Biology Research Group, Department of Bioengineering, Marmara University, Göztepe Campus, Istanbul, Turkey
| | - Wanmeng Mu
- State Key Laboratory of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, Jiangsu, 214122, China.
| |
Collapse
|
4
|
Li X, Bai Y, Ji H, Wang Y, Jin Z. Phenylalanine476 mutation of pullulanase from Bacillus subtilis str. 168 improves the starch substrate utilization by weakening the product β-cyclodextrin inhibition. Int J Biol Macromol 2020; 155:490-497. [DOI: 10.1016/j.ijbiomac.2020.03.239] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 03/16/2020] [Accepted: 03/28/2020] [Indexed: 01/14/2023]
|
5
|
Characterization of an alkali-stable xyloglucanase/mixed-linkage β-glucanase Pgl5A from Paenibacillus sp. S09. Int J Biol Macromol 2019; 140:1158-1166. [DOI: 10.1016/j.ijbiomac.2019.08.210] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2019] [Revised: 08/24/2019] [Accepted: 08/24/2019] [Indexed: 11/15/2022]
|
6
|
Bose H, Satyanarayana T. Utility of thermo-alkali-stable γ-CA from polyextremophilic bacterium Aeribacillus pallidus TSHB1 in biomimetic sequestration of CO 2 and as a virtual peroxidase. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:10869-10884. [PMID: 28293826 DOI: 10.1007/s11356-017-8739-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2016] [Accepted: 03/01/2017] [Indexed: 06/06/2023]
Abstract
Aeribacillus pallidus TSHB1 polyextremophilic bacterium produces a γ-carbonic anhydrase (ApCA), which is a homotrimeric biocatalyst with a subunit molecular mass of 32 ± 2 kDa. The enzyme is stable in the pH range between 8.0 and 11.0 and thus alkali-stable and moderately thermostable with T1/2 values of 40 ± 1, 15 ± 1, and 8 ± 0.5 min at 60, 70, and 80 °C, respectively. Activation energy for irreversible inactivation "E d " of carbonic anhydrase is 67.119 kJ mol-1. The enzyme is stable in the presence of various flue gas contaminants such as SO32-,SO42-, and NO3- and cations Mg2+, Mn2+, Ca2+, and Ba2+. Fluorescence studies in the presence of N-bromosuccinimide and fluorescence quenching using KI and acrylamide revealed the importance of tryptophan residues in maintaining the structural integrity of the enzyme. ApCA is more efficient than the commercially available bovine carbonic anhydrase (BCA) in CO2 sequestration. The enzyme was successfully used in biomineralization of CO2 from flue gas. Replacement of active site Zn2+ with Mn2+ enabled ApCA to function as a peroxidase which exhibited alkali-stability and moderate thermostability like ApCA.
Collapse
Affiliation(s)
- Himadri Bose
- Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India
| | - Tulasi Satyanarayana
- Department of Microbiology, University of Delhi South Campus, Benito Juarez Road, New Delhi, 110021, India.
- Netaji Subhas Institute of Technology, Azad Hind Fauz Marg, Sector 3, Dwarka, New Delhi, 110078, India.
| |
Collapse
|
7
|
Characteristics and applications of recombinant thermostable amylopullulanase of Geobacillus thermoleovorans secreted by Pichia pastoris. Appl Microbiol Biotechnol 2016; 101:2357-2369. [DOI: 10.1007/s00253-016-8025-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 11/20/2016] [Accepted: 11/23/2016] [Indexed: 12/24/2022]
|
8
|
Maurya AK, Parashar D, Satyanarayana T. Bioprocess for the production of recombinant HAP phytase of the thermophilic mold Sporotrichum thermophile and its structural and biochemical characteristics. Int J Biol Macromol 2016; 94:36-44. [PMID: 27697488 DOI: 10.1016/j.ijbiomac.2016.09.102] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 09/10/2016] [Accepted: 09/29/2016] [Indexed: 10/20/2022]
Abstract
Thermophilc mold Sporotrichum thermophile secretes an acidstable and thermostable phytase, which finds application as a food and feed additive because of its adequate thermostability, acid stability, protease insensitivity and broad substrate spectrum. Low extracellular phytase production by the mold is a major bottleneck for its application on a commercial scale. We have successfully overcome this problem by constitutive secretary expression of codon optimized rStPhy under glyceraldehyde phosphate dehydrogenase (GAP) promoter in Pichia pastoris. A ∼41-fold improvement in rStPhy production has been achieved. Circular Dichroism (CD) spectra revealed that rStPhy is composed of 26.65% α-helices, 5.26% β-sheets and 68.09% random coils at pH 5.0 and 60°C, the optima for the enzyme activity. The melting temperature (Tm) of the enzyme is ∼73°C. The 3D structure of rStPhy displayed characteristic signature sequences (RHGXRXP and HD) of HAP phytase. The catalytically important amino acids (Arg74, His75, Arg78, His368 and Asp369) were identified by docking and site directed mutagenesis. Fluorescence quenching by N-bromosuccinimide (NBS) and CsCl exposed tryptophan residues surrounded by negative charges, which play a key role in maintaining structural integrity of rStPhy.
Collapse
Affiliation(s)
- Anay Kumar Maurya
- Department of Microbiology, University of Delhi South Campus, New Delhi 110021, India
| | - Deepak Parashar
- Department of Microbiology, University of Delhi South Campus, New Delhi 110021, India
| | - T Satyanarayana
- Department of Microbiology, University of Delhi South Campus, New Delhi 110021, India.
| |
Collapse
|
9
|
Faridi S, Satyanarayana T. Characteristics of recombinant α-carbonic anhydrase of polyextremophilic bacterium Bacillus halodurans TSLV1. Int J Biol Macromol 2016; 89:659-68. [DOI: 10.1016/j.ijbiomac.2016.05.026] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2016] [Revised: 05/06/2016] [Accepted: 05/07/2016] [Indexed: 11/25/2022]
|
10
|
Nisha M, Satyanarayana T. Characteristics, protein engineering and applications of microbial thermostable pullulanases and pullulan hydrolases. Appl Microbiol Biotechnol 2016; 100:5661-79. [DOI: 10.1007/s00253-016-7572-y] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Revised: 04/15/2016] [Accepted: 04/19/2016] [Indexed: 12/17/2022]
|
11
|
Some like it hot, some like it cold: Temperature dependent biotechnological applications and improvements in extremophilic enzymes. Biotechnol Adv 2015; 33:1912-22. [DOI: 10.1016/j.biotechadv.2015.11.001] [Citation(s) in RCA: 89] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2015] [Revised: 11/12/2015] [Accepted: 11/12/2015] [Indexed: 11/23/2022]
|