1
|
Zhao JY, Gao F, Wu M, Li Y, Chen Y, Xiao Z. Microbial synthesis of enantiopure (S)-2-methylbutanoic acid via L-isoleucine catabolism in Bacillus spizizenii. World J Microbiol Biotechnol 2025; 41:117. [PMID: 40148725 DOI: 10.1007/s11274-025-04324-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2024] [Accepted: 03/13/2025] [Indexed: 03/29/2025]
Abstract
Enantiopure (S)-2-methylbutanoic acid [(S)-2-MBA] is a high-value chiral compound with applications in fragrances, pharmaceuticals, and agrochemicals. However, conventional chemical synthesis lacks stereoselectivity, while existing biosynthetic methods suffer from low yield and purity. Here, we report a novel microbial process using Bacillus spizizenii ATCC 6633 for efficient (S)-2-MBA production via L-isoleucine catabolism. Through targeted screening of rhizospheric soil isolates and Bacillaceae strains, ATCC 6633 demonstrated superior performance, producing 3.67 g/L (S)-2-MBA with 99.32% enantiomeric excess (ee) under optimized conditions (45 °C, 8% inoculation, 5 g/L glucose, and 8 g/L L-isoleucine). A 58.92% conversion efficiency was achieved, and a simplified purification process recovered 63.90% product with 97.32% purity. Mechanistic studies suggested glucose depletion triggered (S)-2-MBA accumulation, aligning with starvation-induced secondary metabolism. This cost-effective, eco-friendly approach eliminates racemic separation steps and harsh reagents, positioning ATCC 6633 as a promising biocatalyst for sustainable (S)-2-MBA production.
Collapse
Affiliation(s)
- Jing-Yi Zhao
- Department of Biology and Energy Chemical Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Huangdao District, Qingdao, 266580, China
| | - Fan Gao
- Department of Biology and Energy Chemical Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Huangdao District, Qingdao, 266580, China
| | - Mengru Wu
- Department of Biology and Energy Chemical Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Huangdao District, Qingdao, 266580, China
| | - Yang Li
- Department of Biology and Energy Chemical Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Huangdao District, Qingdao, 266580, China
| | - Yong Chen
- Department of Biology and Energy Chemical Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Huangdao District, Qingdao, 266580, China
| | - Zijun Xiao
- Department of Biology and Energy Chemical Engineering, College of Chemistry and Chemical Engineering, China University of Petroleum (East China), 66 Changjiang West Road, Huangdao District, Qingdao, 266580, China.
| |
Collapse
|
2
|
Chadha A, Padhi SK, Stella S, Venkataraman S, Saravanan T. Microbial alcohol dehydrogenases: recent developments and applications in asymmetric synthesis. Org Biomol Chem 2024; 22:228-251. [PMID: 38050738 DOI: 10.1039/d3ob01447a] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/06/2023]
Abstract
Alcohol dehydrogenases are a well-known group of enzymes in the class of oxidoreductases that use electron transfer cofactors such as NAD(P)+/NAD(P)H for oxidation or reduction reactions of alcohols or carbonyl compounds respectively. These enzymes are utilized mainly as purified enzymes and offer some advantages in terms of green chemistry. They are environmentally friendly and a sustainable alternative to traditional chemical synthesis of bulk and fine chemicals. Industry has implemented several whole-cell biocatalytic processes to synthesize pharmaceutically active ingredients by exploring the high selectivity of enzymes. Unlike the whole cell system where cofactor regeneration is well conserved within the cellular environment, purified enzymes require additional cofactors or a cofactor recycling system in the reaction, even though cleaner reactions can be carried out with fewer downstream work-up problems. The challenge of producing purified enzymes in large quantities has been solved in large part by the use of recombinant enzymes. Most importantly, recombinant enzymes find applications in many cascade biotransformations to produce several important chiral precursors. Inevitably, several dehydrogenases were engineered as mere recombinant enzymes could not meet the industrial requirements for substrate and stereoselectivity. In recent years, a significant number of engineered alcohol dehydrogenases have been employed in asymmetric synthesis in industry. In a parallel development, several enzymatic and non-enzymatic methods have been established for regenerating expensive cofactors (NAD+/NADP+) to make the overall enzymatic process more efficient and economically viable. In this review article, recent developments and applications of microbial alcohol dehydrogenases are summarized by emphasizing notable examples.
Collapse
Affiliation(s)
- Anju Chadha
- Department of Biotechnology, Indian Institute of Technology Madras, Chennai, 600 036, Tamil Nadu, India.
| | - Santosh Kumar Padhi
- Biocatalysis and Enzyme Engineering Laboratory, Department of Biochemistry, School of Life Sciences, University of Hyderabad, Hyderabad 500 046, Telangana, India.
| | - Selvaraj Stella
- Department of Chemistry, Sarah Tucker College (Affiliated to Manonmaniam Sundaranar University), Tirunelveli-627007, Tamil Nadu, India.
| | - Sowmyalakshmi Venkataraman
- Department of Pharmaceutical Chemistry, Sri Ramachandra Faculty of Pharmacy, Sri Ramachandra Institute of Higher Education & Research, Chennai, 600116, Tamil Nadu, India.
| | - Thangavelu Saravanan
- School of Chemistry, University of Hyderabad, Hyderabad 500 046, Telangana, India.
| |
Collapse
|
3
|
Olaniyi OO, Ajulo AS, Lawal OT, Olatunji VK. Engineered Alcaligenes sp. by chemical mutagen produces thermostable and acido-alkalophilic endo-1,4-β-mannanases for improved industrial biocatalyst. Prep Biochem Biotechnol 2023; 53:1120-1136. [PMID: 36752611 DOI: 10.1080/10826068.2023.2172038] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
This study reported physicochemical properties of purified endo-1,4-β-mannanase from the wild type, Alcaligenes sp. and its most promising chemical mutant. The crude enzymes from fermentation of wild and mutant bacteria were purified by ammonium sulfate precipitation, ion exchange and gel-filtration chromatography followed by an investigation of the physicochemical properties of purified wild and mutant enzymes. β-mannanase from wild and mutant Alcaligenes sp. exhibited 1.75 and 1.6 purification-folds with percentage recoveries of 2.6 and 2.5% and molecular weights of 61.6 and 80 kDa respectively. The wild and mutant β-mannanase were most active at 40 and 50 °C with optimum pH 6.0 for both and were thermostable with very high percentage activity but the wild-type β-mannanase showed better stability over a broad pH activity. The β-mannanase activity from the parent strain was stimulated in the presence of Mn2+, Co2+, Zn2+, Mg2+ and Na+. Vmax and Km for the wild type and its mutant were found to be 0.747 U//mL/min and 5.2 × 10-4 mg/mL, and 0.247 U/mL/min and 2.47 × 10-4 mg/mL, respectively. Changes that occurred in the nucleotide sequences of the most improved mutant may be attributed to its thermo-stability, thermo-tolerant and high substrate affinity- desired properties for improved bioprocesses.
Collapse
Affiliation(s)
| | | | - Olusola Tosin Lawal
- Department of Biochemistry, Federal University of Technology, Akure, Nigeria
| | | |
Collapse
|
4
|
Jeny SR, Srinivasan K. Cesium Carbonate-Promoted Reaction of Nitro-Substituted Donor-Acceptor Cyclopropanes with Salicylaldehydes in Water: Access to Chromane Derivatives. J Org Chem 2023. [PMID: 37318855 DOI: 10.1021/acs.joc.2c03087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
Nitro-substituted donor-acceptor cyclopropanes react with salicylaldehydes in the presence of cesium carbonate in water to give new chromane derivatives. The reaction takes place through in situ formation of allene intermediates from the cyclopropanes and subsequent Michael-initiated ring closure of the intermediates with salicylaldehydes.
Collapse
Affiliation(s)
- Sebastin Raj Jeny
- School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India
| | - Kannupal Srinivasan
- School of Chemistry, Bharathidasan University, Tiruchirappalli 620 024, Tamil Nadu, India
| |
Collapse
|
5
|
Influence of anaerobic biotransformation process of agro-industrial waste with Lactobacillus acidophilus on the rheological parameters: case of study of pig manure. Arch Microbiol 2023; 205:99. [PMID: 36853421 DOI: 10.1007/s00203-023-03437-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Revised: 01/30/2023] [Accepted: 02/09/2023] [Indexed: 03/01/2023]
Abstract
This study evaluated the rheological behavior of the pig waste biotransformation process to produce lactic acid (LA) and biomass with Lactobacillus acidophilus in a stirred reactor. In addition, cell growth, carbohydrate consumption, and LA production were measured at three different agitation speeds, 100, 150, and 200 rpm at 37 °C, with a reaction time of 52 h. During the development of the process, the kinetic and rheological parameters were obtained using the logistic, Gompertz, generalized Gompertz, Ostwald de Waele, and Herschel-Bulkley mathematical models, respectively. The substrate used was pig manure, to which molasses was added at 12% v/v to increase the concentration of carbohydrates. The results suggest that mass exchange is favorable at low agitation speeds. Nevertheless, the presence of molasses rich in carbohydrates as a carbon source modifies the characteristics of the fluid, dilatant (n > 1) at the beginning of the process to end up as pseudoplastic (n < 1) due to the addition of exopolysaccharides and the modification of the physical structure of the substrate. This effect was confirmed by the Herschel-Bulkley model, which presented a better fit to the data obtained, in addition to finding a direct relationship between viscosity and pH that can be used as variables for the control of bioconversion processes of pig manure into biomass rich in Lactobacillus acidophilus.
Collapse
|
6
|
Che C, Zhang W, Men Y, Li H, Qin B, Jia X, You S. Development of an enzymatic process for the synthesis of (1S)-2-chloro-1-(3, 4-difluorophenyl) ethanol, the key intermediate of ticagrelor. MOLECULAR CATALYSIS 2023. [DOI: 10.1016/j.mcat.2023.112963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
|
7
|
Hypouricemic, anti-inflammatory, and antioxidant activities of Lactobacillus-based functional yogurt in induced-arthritic male Wistar rats: Therapeutic and protective potentials. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2022. [DOI: 10.1016/j.bcab.2022.102597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
8
|
Kalay E, Dertli E, Şahin E. Biocatalytic asymmetric synthesis of (S)-1-indanol using Lactobacillus paracasei BD71. BIOCATAL BIOTRANSFOR 2021. [DOI: 10.1080/10242422.2021.2004133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Erbay Kalay
- Kars Vocational School, Kafkas University, Kars, Turkey
| | - Enes Dertli
- Food Engineering Department, Chemical and Metallurgical Engineering Faculty, Yildiz Technical University, Istanbul, Turkey
| | - Engin Şahin
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Bayburt University, Bayburt, Turkey
| |
Collapse
|
9
|
Kalay E, Şahin E. Biocatalytic asymmetric synthesis of (R)-1-tetralol using Lactobacillus paracasei BD101. Chirality 2021; 33:447-453. [PMID: 33970507 DOI: 10.1002/chir.23318] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 04/19/2021] [Accepted: 04/26/2021] [Indexed: 11/10/2022]
Abstract
Asymmetric bioreduction of ketones is a fundamental process in the production of organic molecules. Compounds containing tetralone rings are found in the structure of many biologically active and pharmaceutical molecules. Biocatalytic reduction of ketones is one of the most promising and significant routes to prepare optically active alcohols. In this study, the reductive capacity of Lactobacillus paracasei BD101 was investigated as whole-cell biocatalyst in the enantioselective reduction of 1-tetralone (1). In biocatalytic reduction reactions, the conversion of the substrate and the enantiomeric excess (ee) of the product are significantly affected by optimization parameters such as temperature, agitation rate, pH, and incubation time. Effects of these parameters on ee and conversion were investigated comprehensively. (R)-1-tetralol ((R)-2), which can be used to treat disorder such as obsessive compulsive, post-traumatic stress, premenstrual dysphoric, and social anxiety, was manufactured in enantiopure form, high yield and gram-scale, using whole-cell biocatalysts of L. paracasei BD101. The 7.04 g of (R)-2 was obtained in optically pure form with 95% yield. Also, to our knowledge, this is the first report on production of (R)-2 using whole-cell biocatalyst in excellent yield, conversion, enantiopure form and gram scale. This is a clean, eco-friendly and cheap method for the synthesis of (R)-2 compared with chemical catalyst.
Collapse
Affiliation(s)
- Erbay Kalay
- Kars Vocational School, Kafkas University, Kars, Turkey
| | - Engin Şahin
- Faculty of Health Sciences, Department of Nutrition and Dietetics, Bayburt University, Bayburt, Turkey
| |
Collapse
|
10
|
Qin L, Wu L, Nie Y, Xu Y. Biosynthesis of chiral cyclic and heterocyclic alcohols via CO/C–H/C–O asymmetric reactions. Catal Sci Technol 2021. [DOI: 10.1039/d1cy00113b] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This review covers the recent progress in various biological approaches applied to the synthesis of enantiomerically pure cyclic and heterocyclic alcohols through CO/C–H/C–O asymmetric reactions.
Collapse
Affiliation(s)
- Lei Qin
- School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education
- Jiangnan University
- Wuxi 214122
- China
| | - Lunjie Wu
- School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education
- Jiangnan University
- Wuxi 214122
- China
| | - Yao Nie
- School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education
- Jiangnan University
- Wuxi 214122
- China
- International Joint Research Laboratory for Brewing Microbiology and Applied Enzymology at Jiangnan University
| | - Yan Xu
- School of Biotechnology and Key Laboratory of Industrial Biotechnology of Ministry of Education
- Jiangnan University
- Wuxi 214122
- China
- International Joint Research Laboratory for Brewing Microbiology and Applied Enzymology at Jiangnan University
| |
Collapse
|
11
|
Baydaş Y, Kalay E, Şahin E. Production of enantiomerically enriched chiral carbinols using whole-cell biocatalyst. BIOCATAL BIOTRANSFOR 2020. [DOI: 10.1080/10242422.2020.1837782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Yasemin Baydaş
- Faculty of Engineering, Department of Food Engineering, Bayburt University, Bayburt, Turkey
| | - Erbay Kalay
- Kars Vocational School, Kafkas University, Kars, Turkey
| | - Engin Şahin
- Faculty of Health Sciences, Department of Nutrition and Dietetics, Bayburt University, Bayburt, Turkey
| |
Collapse
|