1
|
Delgado L, Heckmann CM, Di Pisa F, Gourlay L, Paradisi F. Release of Soybean Isoflavones by Using a β-Glucosidase from Alicyclobacillus herbarius. Chembiochem 2021; 22:1223-1231. [PMID: 33237595 PMCID: PMC8048572 DOI: 10.1002/cbic.202000688] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Revised: 11/24/2020] [Indexed: 12/17/2022]
Abstract
β-Glucosidases are used in the food industry to hydrolyse glycosidic bonds in complex sugars, with enzymes sourced from extremophiles better able to tolerate the process conditions. In this work, a novel β-glycosidase from the acidophilic organism Alicyclobacillus herbarius was cloned and heterologously expressed in Escherichia coli BL21(DE3). AheGH1 was stable over a broad range of pH values (5-11) and temperatures (4-55 °C). The enzyme exhibited excellent tolerance to fructose and good tolerance to glucose, retaining 65 % activity in the presence of 10 % (w/v) glucose. It also tolerated organic solvents, some of which appeared to have a stimulating effect, in particular ethanol with a 1.7-fold increase in activity at 10 % (v/v). The enzyme was then applied for the cleavage of isoflavone from isoflavone glucosides in an ethanolic extract of soy flour, to produce soy isoflavones, which constitute a valuable food supplement, full conversion was achieved within 15 min at 30 °C.
Collapse
Affiliation(s)
- Lidia Delgado
- University of Nottingham, School of ChemistryDepartment of Chemical BiologyUniversity ParkNottinghamNG7 2RDUK
| | - Christian M. Heckmann
- University of Nottingham, School of ChemistryDepartment of Chemical BiologyUniversity ParkNottinghamNG7 2RDUK
| | - Flavio Di Pisa
- Dipartimento di BioscienzeUniversità di MilanoVia Celoria 2620133MilanItaly
| | - Louise Gourlay
- Dipartimento di BioscienzeUniversità di MilanoVia Celoria 2620133MilanItaly
| | - Francesca Paradisi
- University of Nottingham, School of ChemistryDepartment of Chemical BiologyUniversity ParkNottinghamNG7 2RDUK
- University of BernDepartment of Chemistry and BiochemistryFreiestrasse 33012BernSwitzerland
| |
Collapse
|
2
|
Harrell EA, Miller ES. Genome Sequence of Aeromicrobium erythreum NRRL B-3381, an Erythromycin-Producing Bacterium of the Nocardioidaceae. GENOME ANNOUNCEMENTS 2016; 4:e00300-16. [PMID: 27103725 PMCID: PMC4841140 DOI: 10.1128/genomea.00300-16] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 02/29/2016] [Accepted: 03/02/2016] [Indexed: 11/23/2022]
Abstract
ITALIC! Aeromicrobium erythreumNRRL B-3381 has a 3,629,239-bp circular genome that has 72% G+C content. There are at least 3,121 coding sequences (CDSs), two rRNA gene operons, and 47 tRNAs. The genome and erythromycin ( ITALIC! ery) biosynthetic gene sequences provide resources for metabolic and combinatorial engineering of polyketides.
Collapse
Affiliation(s)
- Erin A Harrell
- Department of Plant & Microbial Biology, North Carolina State University, Raleigh, North Carolina, USA
| | - Eric S Miller
- Department of Plant & Microbial Biology, North Carolina State University, Raleigh, North Carolina, USA
| |
Collapse
|
3
|
Chen D, Feng J, Huang L, Zhang Q, Wu J, Zhu X, Duan Y, Xu Z. Identification and characterization of a new erythromycin biosynthetic gene cluster in Actinopolyspora erythraea YIM90600, a novel erythronolide-producing halophilic actinomycete isolated from salt field. PLoS One 2014; 9:e108129. [PMID: 25250723 PMCID: PMC4176971 DOI: 10.1371/journal.pone.0108129] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 08/25/2014] [Indexed: 12/20/2022] Open
Abstract
Erythromycins (Ers) are clinically potent macrolide antibiotics in treating pathogenic bacterial infections. Microorganisms capable of producing Ers, represented by Saccharopolyspora erythraea, are mainly soil-dwelling actinomycetes. So far, Actinopolyspora erythraea YIM90600, a halophilic actinomycete isolated from Baicheng salt field, is the only known Er-producing extremophile. In this study, we have reported the draft genome sequence of Ac. erythraea YIM90600, genome mining of which has revealed a new Er biosynthetic gene cluster encoding several novel Er metabolites. This Er gene cluster shares high identity and similarity with the one of Sa. erythraea NRRL2338, except for two absent genes, eryBI and eryG. By correlating genotype and chemotype, the biosynthetic pathways of 3'-demethyl-erythromycin C, erythronolide H (EH) and erythronolide I have been proposed. The formation of EH is supposed to be sequentially biosynthesized via C-6/C-18 epoxidation and C-14 hydroxylation from 6-deoxyerythronolide B. Although an in vitro enzymatic activity assay has provided limited evidence for the involvement of the cytochrome P450 oxidase EryFAc (derived from Ac. erythraea YIM90600) in the catalysis of a two-step oxidation, resulting in an epoxy moiety, the attempt to construct an EH-producing Sa. erythraea mutant via gene complementation was not successful. Characterization of EryKAc (derived from Ac. erythraea YIM90600) in vitro has confirmed its unique role as a C-12 hydroxylase, rather than a C-14 hydroxylase of the erythronolide. Genomic characterization of the halophile Ac. erythraea YIM90600 will assist us to explore the great potential of extremophiles, and promote the understanding of EH formation, which will shed new insights into the biosynthesis of Er metabolites.
Collapse
Affiliation(s)
- Dandan Chen
- Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
- Huzhou Center of Bio-synthetic Innovation, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Huzhou, China
| | - Junyin Feng
- Huzhou Center of Bio-synthetic Innovation, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Huzhou, China
| | - Lei Huang
- Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
| | - Qinglin Zhang
- Huzhou Center of Bio-synthetic Innovation, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Huzhou, China
| | - Jiequn Wu
- Huzhou Center of Bio-synthetic Innovation, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, Huzhou, China
| | - Xiangcheng Zhu
- Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discovery, Changsha, Hunan, China
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan, China
| | - Yanwen Duan
- Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discovery, Changsha, Hunan, China
- Xiangya International Academy of Translational Medicine, Central South University, Changsha, Hunan, China
| | - Zhinan Xu
- Department of Chemical and Biological Engineering, Zhejiang University, Hangzhou, China
- * E-mail:
| |
Collapse
|
4
|
Jiang M, Fang L, Pfeifer BA. Improved heterologous erythromycin A production through expression plasmid re-design. Biotechnol Prog 2013; 29:862-9. [PMID: 23804312 DOI: 10.1002/btpr.1759] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 05/14/2013] [Indexed: 01/15/2023]
Abstract
The production of complex compounds from technically convenient microorganisms is an emerging route to the chemical diversity found in the surrounding environment. In this study, the antibiotic compound erythromycin A is produced from Escherichia coli as an alternative to native production through the soil bacterium Saccharopolyspora erythraea. By doing so, there is an opportunity to apply and refine engineering strategies for the manipulation of the erythromycin biosynthetic pathway and for the overproduction of this and other complex natural compounds. Previously, E. coli-derived production was enabled by the introduction of the entire erythromycin pathway (20 genes total) using separately selectable expression plasmids which demonstrated negative effects on final biosynthesis through metabolic burden and plasmid instability. In this study, improvements to final production were made by altering the design of the expression plasmids needed for biosynthetic pathway introduction. Specifically, the total number of genes and plasmids was pruned to reduce both metabolic burden and plasmid instability. Further, a comparison was conducted between species-specific (E. coli vs. S. coelicolor) protein chaperonins. Results indicate improvements in growth and plasmid retention metrics. The newly designed expression platform also increased erythromycin A production levels 5-fold. In conclusion, the steps outlined in this report were designed to upgrade the E. coli erythromycin A production system, led to improved final compound titers, and suggest additional forms of pathway engineering to further improve results from heterologous production attempts.
Collapse
Affiliation(s)
- Ming Jiang
- State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, 200240, China
| | | | | |
Collapse
|
5
|
Biotransformation and recovery of the isoflavones genistein and daidzein from industrial antibiotic fermentations. Appl Microbiol Biotechnol 2013; 97:6427-37. [PMID: 23604533 DOI: 10.1007/s00253-013-4839-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 03/06/2013] [Accepted: 03/07/2013] [Indexed: 10/26/2022]
Abstract
The objective of this study was to follow the metabolic fate of isoflavone glucosides from the soybean meal in a model industrial fermentation to determine if commercially useful isoflavones could be harvested as coproducts from the spent broth at the end of the fermentation. The isoflavone aglycones, genistein, and daidzein together make up 0.1-0.2 % of the soybean meal by weight but serve no known function in the manufacturing process. After feeding genistein to washed cells of the erythromycin-producing organism, Saccharopolyspora erythraea, the first biotransformation product (Gbp1) was determined by X-ray crystallography to be genistein-7-O-α-rhamnoside (rhamnosylgenistein). Subsequent feeding of rhamnosylgenistein to growing cells of Saccharopolyspora erythraea led to the production of a second biotransformation product, Gbp2. Chromatographic evidence suggested that Gbp2 accumulated in the spent broth of the erythromycin fermentation. When the spent broth was hydrolyzed with acid or industrial enzyme preparations, the isoflavone biotransformation products were returned back to their parental forms, genistein and daidzein, which were then recovered as coproducts. Desirable features of this method are that it does not require modification of the erythromycin manufacturing process or genetic engineering of the producing organism to be put into practice. A preliminary investigation of five additional antibiotic fermentations of industrial importance also found isoflavone coproduct potential.
Collapse
|
6
|
Reeves AR, Weber JM. Metabolic engineering of antibiotic-producing actinomycetes using in vitro transposon mutagenesis. Methods Mol Biol 2012; 834:153-75. [PMID: 22144359 DOI: 10.1007/978-1-61779-483-4_11] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
A program of mutation and screening, with stepwise reverse engineering or "decoding" of the improved strain, is a way to better understand the genetics and physiology of the strain improvement process. As more is learned about the genetics of strain improvement, it is hoped that more fundamental principles will emerge about the types of mutations and genetic manipulations that reliably lead to higher producing strains. This will accelerate the construction of higher producing strains by metabolic engineering in the future. In this chapter, a detailed tagged mutagenesis approach is described using in vitro transposon mutagenesis which allowed the successful identification of key genes involved in macrolide (erythromycin) antibiotic biosynthesis.
Collapse
|
7
|
Jakeman DL, Sadeghi-Khomami A. A β-(1,2)-Glycosynthase and an Attempted Selection Method for the Directed Evolution of Glycosynthases. Biochemistry 2011; 50:10359-66. [DOI: 10.1021/bi201438q] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- David L. Jakeman
- College of Pharmacy, Dalhousie University, 5968 College Street, P.O. Box
15000, Halifax, Nova Scotia B3H 4R2, Canada
- Department of Chemistry, Dalhousie University, 6274 Coberg Road, P.O. Box 15000,
Halifax, Nova Scotia B3H 4R2, Canada
| | - Ali Sadeghi-Khomami
- College of Pharmacy, Dalhousie University, 5968 College Street, P.O. Box
15000, Halifax, Nova Scotia B3H 4R2, Canada
- Department of Chemistry, Dalhousie University, 6274 Coberg Road, P.O. Box 15000,
Halifax, Nova Scotia B3H 4R2, Canada
| |
Collapse
|
8
|
Fermentation optimization and industrialization of recombinant Saccharopolyspora erythraea strains for improved erythromycin a production. BIOTECHNOL BIOPROC E 2011. [DOI: 10.1007/s12257-010-0020-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
|