1
|
Vita N, Borne R, Fierobe HP. Cell-surface exposure of a hybrid 3-cohesin scaffoldin allowing the functionalization of Escherichia coli envelope. Biotechnol Bioeng 2020; 117:626-636. [PMID: 31814100 DOI: 10.1002/bit.27242] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 11/27/2019] [Accepted: 11/30/2019] [Indexed: 12/26/2022]
Abstract
Cellulosomes are large plant cell wall degrading complexes secreted by some anaerobic bacteria. They are typically composed of a major scaffolding protein containing multiple receptors called cohesins, which tightly anchor a small complementary module termed dockerin harbored by the cellulosomal enzymes. In the present study, we have successfully cell surface exposed in Escherichia coli a hybrid scaffoldin, Scaf6, fused to the curli protein CsgA, the latter is known to polymerize at the surface of E. coli to form extracellular fibers under stressful environmental conditions. The C-terminal part of the chimera encompasses the hybrid scaffoldin composed of three cohesins from different bacterial origins and a carbohydrate-binding module targeting insoluble cellulose. Using three cellulases hosting the complementary dockerin modules and labeled with different fluorophores, we have shown that the hybrid scaffoldin merged to CsgA is massively exposed at the cell surface of E. coli and that each cohesin module is fully operational. Altogether these data open a new route for a series of biotechnological applications exploiting the cell-surface exposure of CsgA-Scaf6 in various industrial sectors such as vaccines, biocatalysts or bioremediation, simply by grafting the small dockerin module to the desired proteins before incubation with the engineered E. coli.
Collapse
Affiliation(s)
- Nicolas Vita
- Aix-Marseille université, CNRS, LCB, Marseille, France
| | - Romain Borne
- Aix-Marseille université, CNRS, LCB, Marseille, France
| | | |
Collapse
|
2
|
In silico Approach to Elucidate Factors Associated with GH1 β-Glucosidase Thermostability. JOURNAL OF PURE AND APPLIED MICROBIOLOGY 2019. [DOI: 10.22207/jpam.13.4.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
3
|
Gomes-Pepe ES, Machado Sierra EG, Pereira MR, Castellane TCL, Lemos EGDM. Bg10: A Novel Metagenomics Alcohol-Tolerant and Glucose-Stimulated GH1 ß-Glucosidase Suitable for Lactose-Free Milk Preparation. PLoS One 2016; 11:e0167932. [PMID: 28002476 PMCID: PMC5176175 DOI: 10.1371/journal.pone.0167932] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Accepted: 11/22/2016] [Indexed: 11/19/2022] Open
Abstract
New ß-glucosidases with product (glucose) or ethanol tolerances are greatly desired to make industrial processes more marketable and efficient. Therefore, this report describes the in silico/vitro characterization of Bg10, a metagenomically derived homodimeric ß-glucosidase that exhibited a Vmax of 10.81 ± 0.43 μM min-1, Kcat of 175.1± 6.91 min-1, and Km of 0.49 ± 0.12 mM at a neutral pH and 37°C when pNP-ß-D-glucopyranoside was used as the substrate, and the enzyme retained greater than 80% activity within the respective pH and temperature ranges of 6.5 to 8.0 and 35 to 40°C. The enzyme was stimulated by its product, glucose; consequently, the Bg10 activity against 50 and 100 mM of glucose were increased by 36.8% and 22%, respectively, while half of the activity was retained at 350 mM. Moreover, the Bg10 was able to hydrolyse 55% (milk sample) and 100% (purified sugar) of the lactose at low (6°C) and optimum (37°C) temperatures, respectively, suggesting the possibility of further optimization of the reaction for lactose-free dairy production. In addition, the enzyme was able to fully hydrolyse 40 mM of cellobiose at one hour and was tolerant to ethanol up to concentrations of 500 mM (86% of activity), while a 1 M concentration still resulted in 41% residual activity, which could be interesting for biofuel production.
Collapse
Affiliation(s)
- Elisângela Soares Gomes-Pepe
- Department of Technology, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal. Via de Acesso Prof. Paulo Donato Castellane S/N, km 5, CEP, Jaboticabal, São Paulo State, Brazil
- Molecular Biology Laboratory; Institute for Research in Bioenergy (IPBEN), UNESP–Jaboticabal, SP, Brazil
- Agricultural Microbiology postgraduate program of UNESP, Jaboticabal, São Paulo State, Brazil
| | - Elwi Guillermo Machado Sierra
- Department of Technology, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal. Via de Acesso Prof. Paulo Donato Castellane S/N, km 5, CEP, Jaboticabal, São Paulo State, Brazil
- Molecular Biology Laboratory; Institute for Research in Bioenergy (IPBEN), UNESP–Jaboticabal, SP, Brazil
| | - Mariana Rangel Pereira
- Department of Technology, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal. Via de Acesso Prof. Paulo Donato Castellane S/N, km 5, CEP, Jaboticabal, São Paulo State, Brazil
- Molecular Biology Laboratory; Institute for Research in Bioenergy (IPBEN), UNESP–Jaboticabal, SP, Brazil
| | - Tereza Cristina Luque Castellane
- Department of Technology, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal. Via de Acesso Prof. Paulo Donato Castellane S/N, km 5, CEP, Jaboticabal, São Paulo State, Brazil
- Molecular Biology Laboratory; Institute for Research in Bioenergy (IPBEN), UNESP–Jaboticabal, SP, Brazil
| | - Eliana Gertrudes de Macedo Lemos
- Department of Technology, São Paulo State University (Unesp), School of Agricultural and Veterinarian Sciences, Jaboticabal. Via de Acesso Prof. Paulo Donato Castellane S/N, km 5, CEP, Jaboticabal, São Paulo State, Brazil
- Molecular Biology Laboratory; Institute for Research in Bioenergy (IPBEN), UNESP–Jaboticabal, SP, Brazil
| |
Collapse
|
4
|
Feng HW, Zhi YE, Sun YJ, Xu LR, Wang LM, Zhan XJ, Zhou P. Insight into a novel β-1,4-glucosidase from Streptomyces griseorubens JSD-1. APPL BIOCHEM MICRO+ 2016. [DOI: 10.1134/s0003683816040050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
5
|
Qian X, Song L, Ni Y. Enhanced organic solvent tolerance of Escherichia coli by 3-hydroxyacid dehydrogenase family genes. Appl Biochem Biotechnol 2014; 172:3106-15. [PMID: 24492952 DOI: 10.1007/s12010-014-0726-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2013] [Accepted: 01/02/2014] [Indexed: 11/24/2022]
Abstract
A 3-hydroxyisobutyrate dehydrogenase-encoding gene mmsB has been identified as one of the key genes responsible for the enhanced organic solvent tolerance (OST) of Pseudomonas putida JUCT1. In this study, the OST-related effect of two 3-hydroxyacid dehydrogenase family genes (mmsB and zwf) was investigated in Escherichia coli JM109. It was noted that the growth of E. coli JM109 was severely hampered in 4% decalin after zwf knockout. Additionally, its complementation resulted in significantly enhanced solvent tolerance compared with its parent strain. Furthermore, E. coli JM109 carrying mmsB showed better OST capacity than that harboring zwf. To construct E. coli strains with an inheritable OST phenotype, mmsB was integrated into the genome of E. coli JM109 by red-mediated recombination. Using E. coli JM109(DE3) (ΔendA::mmsB) as host strain, whole-cell biocatalysis was successfully carried out in an aqueous/butyl acetate biphasic system with a remarkably improved product yield.
Collapse
Affiliation(s)
- Xiaohong Qian
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, Jiangsu, China
| | | | | |
Collapse
|