1
|
Wen W, Hu M, Gao Y, Zhang P, Meng W, Zhang F, Fan B, Wang F, Li S. Effect of Soy Protein Products on Growth and Metabolism of Bacillus subtilis, Streptococcus lactis, and Streptomyces clavuligerus. Foods 2024; 13:1525. [PMID: 38790825 PMCID: PMC11121397 DOI: 10.3390/foods13101525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2024] [Revised: 05/08/2024] [Accepted: 05/10/2024] [Indexed: 05/26/2024] Open
Abstract
Microbial nitrogen sources are promising, and soy protein as a plant-based nitrogen source has absolute advantages in creating microbial culture medium in terms of renewability, eco-friendliness, and greater safety. Soy protein is rich in variety due to different extraction technologies and significantly different in the cell growth and metabolism of microorganisms as nitrogen source. Therefore, different soy proteins (soy meal powder, SMP; soy peptone, SP; soy protein concentrate, SPC; soy protein isolate, SPI; and soy protein hydrolysate, SPH) were used as nitrogen sources to culture Bacillus subtilis, Streptococcus lactis, and Streptomyces clavuligerus to evaluate the suitable soy nitrogen sources of the above strains. The results showed that B. subtilis had the highest bacteria density in SMP medium; S. lactis had the highest bacteria density in SPI medium; and S. clavuligerus had the highest PMV in SPI medium. Nattokinase activity was the highest in SP medium; the bacteriostatic effect of nisin was the best in SPI medium; and the clavulanic acid concentration was the highest in SMP medium. Based on analyzing the correlation between the nutritional composition and growth metabolism of the strains, the results indicated that the protein content and amino acid composition were the key factors influencing the cell growth and metabolism of the strains. These findings present a new, high-value application opportunity for soybean protein.
Collapse
Affiliation(s)
- Wei Wen
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China; (W.W.); (M.H.); (Y.G.); (P.Z.); (W.M.); (F.Z.); (B.F.)
| | - Miao Hu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China; (W.W.); (M.H.); (Y.G.); (P.Z.); (W.M.); (F.Z.); (B.F.)
| | - Yaxin Gao
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China; (W.W.); (M.H.); (Y.G.); (P.Z.); (W.M.); (F.Z.); (B.F.)
| | - Pengfei Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China; (W.W.); (M.H.); (Y.G.); (P.Z.); (W.M.); (F.Z.); (B.F.)
| | - Weimin Meng
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China; (W.W.); (M.H.); (Y.G.); (P.Z.); (W.M.); (F.Z.); (B.F.)
| | - Fengxia Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China; (W.W.); (M.H.); (Y.G.); (P.Z.); (W.M.); (F.Z.); (B.F.)
| | - Bei Fan
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China; (W.W.); (M.H.); (Y.G.); (P.Z.); (W.M.); (F.Z.); (B.F.)
| | - Fengzhong Wang
- Key Laboratory of Agro-Products Quality and Safety Control in Storage and Transport Process, Ministry of Agriculture and Rural Affairs, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Shuying Li
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, No. 2 Yuan Ming Yuan West Road, Beijing 100193, China; (W.W.); (M.H.); (Y.G.); (P.Z.); (W.M.); (F.Z.); (B.F.)
| |
Collapse
|
2
|
Yamaguchi S, Fujioka T, Yoshimi A, Kumagai T, Umemura M, Abe K, Machida M, Kawai K. Discovery of a gene cluster for the biosynthesis of novel cyclic peptide compound, KK-1, in Curvularia clavata. FRONTIERS IN FUNGAL BIOLOGY 2023; 3:1081179. [PMID: 37746209 PMCID: PMC10512319 DOI: 10.3389/ffunb.2022.1081179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Accepted: 12/15/2022] [Indexed: 09/26/2023]
Abstract
KK-1, a cyclic depsipeptide with 10 residues produced by a filamentous fungus Curvularia clavata BAUA-2787, is a promising pesticide active compound with high activity against many plant pathogens, especially Botrytis cinerea. As a first step toward the future mass production of KK-1 through synthetic biological approaches, we aimed to identify the genes responsible for the KK-1 biosynthesis. To achieve this, we conducted whole genome sequencing and transcriptome analysis of C. clavata BAUA-2787 to predict the KK-1 biosynthetic gene cluster. We then generated the overexpression and deletion mutants for each cluster gene using our originally developed transformation system for this fungus, and analyzed the KK-1 production and the cluster gene expression levels to confirm their involvement in KK-1 biosynthesis. As a result of these, a region of approximately 71 kb was found, containing 10 open reading frames, which were co-induced during KK-1 production, as a biosynthetic gene cluster. These include kk1B, which encodes nonribosomal peptide synthetase with a domain structure that is consistent with the structural features of KK-1, and kk1F, which encodes a transcription factor. The overexpression of kk1F increased the expression of the entire cluster genes and, consequently, improved KK-1 production, whereas its deletion decreased the expression of the entire cluster genes and almost eliminated KK-1 production, demonstrating that the protein encoded by kk1F regulates the expressions of the other nine cluster genes cooperatively as the pathway-specific transcription factor. Furthermore, the deletion of each cluster gene caused a reduction in KK-1 productivity, indicating that each gene is involved in KK-1 production. The genes kk1A, kk1D, kk1H, and kk1I, which showed a significant decrease in KK-1 productivity due to deletion, were presumed to be directly involved in KK-1 structure formation, including the biosynthesis of the constituent residues. kk1C, kk1E, kk1G, and kk1J, which maintained a certain level of KK-1 productivity despite deletion, were possibly involved in promoting or assisting KK-1 production, such as extracellular transportation and the removal of aberrant units incorporated into the peptide chain.
Collapse
Affiliation(s)
- Shigenari Yamaguchi
- Biotechnology Laboratory, Life & Environment Research Center, Life Science Research Institute, Research & Development Division, Kumiai Chemical Industry Co., Ltd., Shizuoka, Japan
| | - Tomonori Fujioka
- Biotechnology Laboratory, Life & Environment Research Center, Life Science Research Institute, Research & Development Division, Kumiai Chemical Industry Co., Ltd., Shizuoka, Japan
| | - Akira Yoshimi
- ABE-Project, New Industry Creation Hatchery Center, Tohoku University, Sendai, Japan
- Laboratory of Terrestrial Microbial Ecology, Graduate School of Agriculture, Kyoto University, Kyoto, Japan
| | | | - Maiko Umemura
- Bio-system Research Group, Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
| | - Keietsu Abe
- ABE-Project, New Industry Creation Hatchery Center, Tohoku University, Sendai, Japan
- Laboratory of Applied Microbiology, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan
| | - Masayuki Machida
- Bio-system Research Group, Bioproduction Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Japan
- Graduate School of Engineering, Genome Biotechnology Laboratory, Kanazawa Institute of Technology, Ishikawa, Japan
| | - Kiyoshi Kawai
- Biotechnology Laboratory, Life & Environment Research Center, Life Science Research Institute, Research & Development Division, Kumiai Chemical Industry Co., Ltd., Shizuoka, Japan
| |
Collapse
|
3
|
Jo HG, Adidjaja JJ, Kim DK, Park BS, Lee N, Cho BK, Kim HU, Oh MK. Comparative genomic analysis of Streptomyces rapamycinicus NRRL 5491 and its mutant overproducing rapamycin. Sci Rep 2022; 12:10302. [PMID: 35717543 PMCID: PMC9206652 DOI: 10.1038/s41598-022-14199-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2022] [Accepted: 06/02/2022] [Indexed: 12/04/2022] Open
Abstract
Streptomyces rapamycinicus NRRL 5491 is a well-known producer of rapamycin, a secondary metabolite with useful bioactivities, including antifungal, antitumor, and immunosuppressive functions. For the enhanced rapamycin production, a rapamycin-overproducing strain SRMK07 was previously obtained as a result of random mutagenesis. To identify genomic changes that allowed the SRMK07 strain’s enhanced rapamycin production, genomes of the NRRL 5491 and SRMK07 strains were newly sequenced in this study. The resulting genome sequences of the wild-type and SRMK07 strains showed the size of 12.47 Mbp and 9.56 Mbp, respectively. Large deletions were observed at both end regions of the SRMK07 strain’s genome, which cover 17 biosynthetic gene clusters (BGCs) encoding secondary metabolites. Also, genes in a genomic region containing the rapamycin BGC were shown to be duplicated. Finally, comparative metabolic network analysis using these two strains’ genome-scale metabolic models revealed biochemical reactions with different metabolic fluxes, which were all associated with NADPH generation. Taken together, the genomic and computational approaches undertaken in this study suggest biological clues for the enhanced rapamycin production of the SRMK07 strain. These clues can also serve as a basis for systematic engineering of a production host for further enhanced rapamycin production.
Collapse
Affiliation(s)
- Hee-Geun Jo
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Joshua Julio Adidjaja
- Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Do-Kyung Kim
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Bu-Soo Park
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea
| | - Namil Lee
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Byung-Kwan Cho
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea
| | - Hyun Uk Kim
- Department of Chemical and Biomolecular Engineering (BK21 Four), Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, Republic of Korea.
| | - Min-Kyu Oh
- Department of Chemical and Biological Engineering, Korea University, Seoul, 02841, Republic of Korea.
| |
Collapse
|
4
|
Feng T, Zhao J, Bai YF, Chu J, Wang YH, Zhuang YP. Effect of temperature on synthesis of clavulanic acid and impurity substance G during fermentation by Streptomyces clavuligerus. Prep Biochem Biotechnol 2021; 52:937-941. [PMID: 34871519 DOI: 10.1080/10826068.2021.2009860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Effect of temperature on synthesis of Clavulanic acid (CA) and impurity substance G during fermentation by Streptomyces clavuligerus were investigated. Results show that fermentation at 24 °C is the most favorable for CA synthesis though the fermentation duration was 20-30 hours longer than fermentation at 26 and 28 °C. Meanwhile, the impurity substance G was only 110 mg/L in the end broth of fermentation at 24 °C, which was significantly lower than 148 and 180 mg/L of fermentation at 26 and 28 °C, respectively. Correlation of specific growth rate and CA synthesis was statistically analyzed based on data of 10 batches of industrial fermentation. Two temperature-shift strategies were investigated in 50 L fermenter. Fermentation with 26-24 °C temperature strategy achieved 5097 mg/L CA titer, meanwhile the fermentation duration was shortened 24 hours comparing with fermentation at constant 24 °C. Fermentation with 26-24 °C control strategy was validated in a 60 m3 industrial fermenter, in which 4960 mg/L of CA was achieved while impurity G substance was decreased to titer 65 mg/L from 200 to 300 mg/L of normal production.
Collapse
Affiliation(s)
- Tao Feng
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, People's Republic China.,Sinopharm Weiqida Pharmaceutical Co., Ltd., DaTong, Shanxi Province, People's Republic China
| | - Jie Zhao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, People's Republic China
| | - Yan-Feng Bai
- Sinopharm Weiqida Pharmaceutical Co., Ltd., DaTong, Shanxi Province, People's Republic China
| | - Ju Chu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, People's Republic China
| | - Yong-Hong Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, People's Republic China
| | - Ying-Ping Zhuang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai, People's Republic China
| |
Collapse
|
5
|
Feng T, Zhao J, Chu J, Wang YH, Zhuang YP. Statistical Optimizing of Medium for Clavulanic Acid Production by Streptomyces clavuligerus Using Response Surface Methodology. Appl Biochem Biotechnol 2021; 193:3936-3948. [PMID: 34436750 DOI: 10.1007/s12010-021-03627-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 07/12/2021] [Indexed: 10/20/2022]
Abstract
Clavulanic acid (CA) is a naturally occurring antibiotic produced by Streptomyces clavuligerus. Statistical optimization of the fermentation medium for CA production by Streptomyces clavuligerus was carried out. Multiple carbon sources, glycerol, dextrin, and triolein, were considered simultaneously. A two-level fractional factorial design experiment was conducted to identify the significant components of medium on CA production. Statistical analysis of the results showed that soybean meal, dextrin, and triolein were the most significant medium ingredients on CA production. The optimal level of these screened components was obtained by RSM based on the result of a Box-Behnken design, in which the values of dextrin, soybean meal, and triolein in CA fermentation medium were 12.37 g/L, 39.75 g/L, and 26.98 ml/L, respectively. Using the proposed optimized medium, the model predicted 938 mg/L of CA level and via experimental rechecking the model, 946 mg/L of CA level was attained in shake flask fermentation, significantly high than 630 mg/L of original medium. The optimized medium was further verified in 50-L stirred fermenter, and compared with performance of original medium in parallel, CA titer was increased from 889 to 1310 mg/L; a 47% increase was achieved through medium optimization by statistical approaches.
Collapse
Affiliation(s)
- Tao Feng
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 200237, Shanghai, People's Republic of China.,Sinopharm Weiqida Pharmaceutical Co., Ltd, No.1 Medical Park, Datong Economic Development Zone, Datong, Shanxi Province, 037300, People's Republic of China
| | - Jie Zhao
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 200237, Shanghai, People's Republic of China
| | - Ju Chu
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 200237, Shanghai, People's Republic of China.
| | - Yong-Hong Wang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 200237, Shanghai, People's Republic of China
| | - Ying-Ping Zhuang
- State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 200237, Shanghai, People's Republic of China
| |
Collapse
|
6
|
Palwe S, Khobragade K, Kharat AS. Preserving the Dwindling β-lactams-Based Empiric Therapy Options for Gram-Negative Infections in Challenging Resistance Scenario: Lessons Learned and Way Forward. Microb Drug Resist 2019; 26:637-651. [PMID: 31851576 DOI: 10.1089/mdr.2019.0195] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Appropriate empiric therapy reduces mortality and morbidity associated with serious Gram-negative infections. β-lactams (BLs) owing to their safety, efficacy, and coverage spectrum are the most preferred agents for empiric use. Inappropriate use of older penicillins and cephalosporins led to selection and spread of resistant clones. As a result, these valuable agents have lost their reliability compelling clinicians to often use erstwhile last-line therapies such as carbapenems. Excessive carbapenems use imposed collateral damage by selecting difficult-to-treat carbapenem-resistant organisms. Lack of empiric therapeutic options amenable for use in infections caused by contemporary pathogens was realized by the pharmaceutical industry leading to intensive efforts in discovering novel antibiotics. These efforts led to the approval of newer β-lactams and β-lactamase inhibitor (BL-BLI) combination. This review elaborates the past trends in empirical use of BLs and ensuing patterns of resistance emergence in Gram-negatives. Furthermore, a critical appraisal of newer BL-BLIs has been presented to identify the appropriate clinical situations for their use to ensure clinical efficacy coupled with minimal resistance selection. These learning have been derived from past trends of clinical usage of older empiric therapies so that the therapeutic utility of newer agents is preserved for long in light of dwindling global antibiotics pipeline.
Collapse
Affiliation(s)
- Snehal Palwe
- Department of Environmental Science, SB College of Science, Aurangabad, India
| | - Kshama Khobragade
- Department of Environmental Science, SB College of Science, Aurangabad, India
| | - Arun S Kharat
- Laboratory of Microbiology, Jawaharlal Nehru University, New Delhi, India
| |
Collapse
|
7
|
Yolmeh M, Khomeiri M, Ghorbani M, Ghaemi E, Ramezanpour SS. High efficiency pigment production from Micrococcus roseus (PTCC 1411) under ultraviolet irradiation. BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2017. [DOI: 10.1016/j.bcab.2016.12.010] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
8
|
Using physical and chemical mutagens for enhanced carotenoid production from Rhodotorula glutinis (PTCC 5256). BIOCATALYSIS AND AGRICULTURAL BIOTECHNOLOGY 2016. [DOI: 10.1016/j.bcab.2016.09.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
|
9
|
da Silva Vasconcelos E, de Lima VA, Goto LS, Cruz-Hernández IL, Hokka CO. Clavulanic acid production by the MMS 150 mutant obtained from wild type Streptomyces clavuligerus ATCC 27064. Braz J Microbiol 2013; 44:1049-57. [PMID: 24688492 PMCID: PMC3958168 DOI: 10.1590/s1517-83822014005000005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2011] [Accepted: 04/01/2013] [Indexed: 11/21/2022] Open
Abstract
Clavulanic acid (CA) is a powerful inhibitor of the beta-lactamases, enzymes produced by bacteria resistants to penicillin and cefalosporin. This molecule is produced industrially by strains of Streptomyces clavuligerus in complex media which carbon and nitrogen resources are supplied by inexpensive compounds still providing high productivity. The genetic production improvement using physical and chemical mutagenic agents is an important strategy in programs of industrial production development of bioactive metabolites. However, parental strains are susceptible to loss of their original productivity due genetic instability phenomenona. In this work, some S. clavuligerus mutant strains obtained by treatment with UV light and with MMS are compared with the wild type (Streptomyces clavuligerus ATCC 27064). The results indicated that the random mutations originated some strains with different phenotypes, most divergent demonstrated by the mutants strains named AC116, MMS 150 and MMS 54, that exhibited lack of pigmentation in their mature spores. Also, the strain MMS 150 presented a larger production of CA when cultivated in semi-synthetics media. Using other media, the wild type strain obtained a larger CA production. Besides, using the modifed complex media the MMS 150 strain showed changes in its lipolitic activity and a larger production of CA. The studies also allowed finding the best conditions for a lipase activity exhibited by wild type S. clavuligerus and the MMS150 mutant.
Collapse
Affiliation(s)
| | | | - Leandro Seiji Goto
- Departamento de Engenharia Química, Universidade Federal de São Carlos, São Carlos SP, Brazil
- Grupo de Biofísica Molecular “Sérgio Mascarenhas”, Instituto de Física de São Carlos, Universidade de São Paulo, São Carlos, SP, Brazil
| | | | - Carlos Osamu Hokka
- Departamento de Engenharia Química, Universidade Federal de São Carlos, São Carlos SP, Brazil
| |
Collapse
|
10
|
Marques DAV, Cunha MNC, Araújo JM, Lima-Filho JL, Converti A, Pessoa A, Porto ALF. Optimization of clavulanic acid production by Streptomyces daufpe 3060 by response surface methodology. Braz J Microbiol 2011; 42:658-67. [PMID: 24031677 PMCID: PMC3769858 DOI: 10.1590/s1517-838220110002000030] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2010] [Accepted: 01/13/2011] [Indexed: 11/22/2022] Open
Abstract
Clavulanic acid is a ß-lactam antibiotic which has a potent ß-lactamase inhibiting activity. In order to optimize its production by the new isolate Streptomyces DAUFPE 3060, the influence of two independent variables, temperature and soybean flour concentration, on clavulanic acid and biomass concentrations was investigated in 250 mL-Erlenmeyers according to a 22 central composite design. To this purpose, temperature and soybean flour (SF) concentration were varied in the ranges 26–34°C and 10–50 g/L, respectively, and the results evaluated utilizing the Response Surface Methodology. The experimental maximum production of clavulanic acid (629 mg/L) was obtained at 32°C and 40 g/L SF after 48 h, while the maximum biomass concentration (3.9 g/L) at 30°C and 50 g/L soybean flour, respectively. These values are satisfactorily close to those (640 mg/L and 3.75 g/L, respectively) predicted by the model, thereby demonstrating the validity of the mathematical approach adopted in this study.
Collapse
Affiliation(s)
- Daniela A Viana Marques
- Departamento de Tecnologia Bioquímico-Farmacêutica, Universidade de São Paulo , São Paulo, SP , Brasil
| | | | | | | | | | | | | |
Collapse
|
11
|
Arshad R, Farooq S, Ali SS. Improvement of penicillin G acylase expression in Escherichia coli through UV induced mutations. Braz J Microbiol 2010; 41:1133-41. [PMID: 24031596 PMCID: PMC3769778 DOI: 10.1590/s1517-838220100004000035] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2009] [Revised: 02/18/2010] [Accepted: 04/26/2010] [Indexed: 11/21/2022] Open
Abstract
We used ultraviolet (UV) radiation to induce mutation in three locally isolated strains of Escherichia coli. Different dilutions of bacterial cultures were exposed to UV lamp of 254 nm wavelength for different time intervals at varied distances ranging from 5 to 210 sec and 5 to 100 cm. Viable colonies were screened for mutants with an increased production of penicillin G acylase (PGA) and a reduced production of β-lactamase, which are the desired properties of PGA producing industrial strains. A survival curve was made to get optimum exposure time and distance. The survival percentage for each exposure period was calculated and 1-5% survival was found useful for obtaining mutants with desired change. Screening for PGA and β-lactamase constitutive and/or deficient mutants was made by Serratia marcescens overlay test. A total of 100 survivors were selected of which 49% expressed PGA activity higher than the parent strain. Frequency of β-lactamase constitutive and deficient mutants was 48 and 52%, respectively. The best hyper-producing mutant (BDCS-N-M74), with almost negligible expression of β-lactamase, exhibited three-fold (22.5 mg 6-APA h(-1) mg(-1) wet cells) increase in PGA activity compared with that in the parent strain (6.7 mg 6-APA h(-1) mg(-1) wet cells). The results indicated the successful induction of UV mediated mutation in E. coli for PGA hyper-producing mutants lacking β-lactamase activity.
Collapse
Affiliation(s)
- Rubina Arshad
- Nuclear Institute for Agriculture and Biology (NIAB) , Faisalabad Pakistan
| | | | | |
Collapse
|
12
|
Kang M, Jones BD, Mandel AL, Hammons JC, DiPasquale AG, Rheingold AL, La Clair JJ, Burkart MD. Isolation, Structure Elucidation, and Antitumor Activity of Spirohexenolides A and B. J Org Chem 2009; 74:9054-61. [DOI: 10.1021/jo901826d] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- MinJin Kang
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093
| | - Brian D. Jones
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093
| | - Alexander L. Mandel
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093
| | - Justin C. Hammons
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093
| | - Antonio G. DiPasquale
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093
| | - Arnold L. Rheingold
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093
| | - James J. La Clair
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093
| | - Michael D. Burkart
- Department of Chemistry and Biochemistry, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093
| |
Collapse
|
13
|
Screening of variables influencing the clavulanic acid production by Streptomyces DAUFPE 3060 strain. Appl Biochem Biotechnol 2009; 160:1797-807. [PMID: 19475517 DOI: 10.1007/s12010-009-8671-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2009] [Accepted: 05/13/2009] [Indexed: 10/20/2022]
Abstract
Clavulanic acid (CA) is a beta-lactam antibiotic, which has a potent beta-lactamase inhibiting activity. The influence of five variables, namely pH (6.0, 6.4, and 6.8), temperature (28 degrees C, 30 degrees C, and 32 degrees C), agitation intensity (150, 200, and 250 rpm), glycerol concentration (5.0, 7.5, and 10 g/L) and soybean flour concentration (5.0, 12.5, and 20 g/L), on CA production by a new isolate of Streptomyces (DAUFPE 3060) was investigated in 250-mL Erlenmeyer flasks using a fractional factorial design. Temperature and soybean flour concentration were shown to be the two variables that exerted the most important effects on the production of CA at 95% confidence level. The highest CA concentration (494 mg/L) was obtained after 48 h at 150 rpm, 32 degrees C, pH 6.0, 5.0 g/L glycerol, and 20 g/L soybean flour concentrations. Under these conditions, the yields of biomass and product on consumed substrate were 0.26 g(X)/g(S) and 64.3 mg(P)/g(S), respectively. Fermentations performed in 3.0-L bench-scale fermenter allowed increasing the CA production by about 60%.
Collapse
|
14
|
Korbekandi H, Hojjati Z, Abedi D, Pourhosein M, Darkhal P. Overproduction of clavulanic acid by UV mutagenesis of Streptomyces clavuligerus. J Biotechnol 2007. [DOI: 10.1016/j.jbiotec.2007.07.931] [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]
|
15
|
Saudagar PS, Singhal RS. A statistical approach using L(25) orthogonal array method to study fermentative production of clavulanic acid by Streptomyces clavuligerus MTCC 1142. Appl Biochem Biotechnol 2007; 136:345-59. [PMID: 17625238 DOI: 10.1007/s12010-007-9030-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2006] [Revised: 04/13/2006] [Accepted: 04/20/2006] [Indexed: 10/23/2022]
Abstract
Clavulanic acid is a naturally occurring antibiotic produced by Streptomyces clavuligerus. The present work reports on clavulanic acid production by Streptomyces clavuligerus MTCC 1142 using one-factor-at-a-time and L(25) orthogonal array. The one-factor-at-a-time method was adopted to investigate the effect of media components (i.e., carbon source, nitrogen source and inoculum concentration) and environmental factors such as pH for clavulanic acid production. Production of clavulanic acid by Streptomyces clavuligerus was investigated using seven different carbon sources (viz. glucose, sucrose, modified starch, rice-bran oil, soybean oil, palm oil, and glycerol) and six different nitrogen sources (viz. peptone, yeast extract, ammonium chloride, ammonium carbonate, sodium nitrate and potassium nitrate). A maximum yield of 140 microg/mL clavulanic acid was obtained in the medium containing soybean oil as a carbon source and yeast extract as nitrogen source. Subsequently, the concentration of soybean flour, soybean oil, dextrin, yeast extract and K2HPO4 were optimized using L25 orthogonal array method. The final optimized medium produced 500 microg/mL clavulanic acid at the end of 96 h as compared to 140 microg/mL before optimization. Synthesis of precursor molecules as a metabolic driving force is of considerable importance in antibiotic synthesis. Attempts to increase the clavulanic acid synthesis by manipulating the anaplerotic flux on C(3) and C(5) precursors by supplementing the medium with arginine, ornithine, proline, valine, leucine, isoleucine, pyruvic acid and alpha-ketoglutarate were successful. Supplementing the optimized medium with 0.1 M arginine and 0.1 M leucine increased the yield of clavulanic acid further to 1100 microg/mL and 1384 microg/mL respectively.
Collapse
Affiliation(s)
- Parag S Saudagar
- Food and Fermentation Technology Department, University Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | | |
Collapse
|
16
|
Phillips OA. β-Lactamase inhibitors: a survey of the patent literature 2000 – 2004. Expert Opin Ther Pat 2006. [DOI: 10.1517/13543776.16.3.319] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
|