1
|
Wen X, Li J, Yang F, Zhang X, Li Y. Exploring the Effect of High-Energy Heavy Ion Beam on Rice Genome: Transposon Activation. Genes (Basel) 2023; 14:2178. [PMID: 38137000 PMCID: PMC10742395 DOI: 10.3390/genes14122178] [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: 10/30/2023] [Revised: 11/25/2023] [Accepted: 11/29/2023] [Indexed: 12/24/2023] Open
Abstract
High-energy heavy ion beams are a new type of physical mutagen that can produce a wide range of phenotypic variations. In order to understand the mechanism of high-energy heavy ion beams, we resequenced the whole genome of individual plants with obvious phenotypic variations in rice. The sequence alignment results revealed a large number of SNPs and InDels, as well as genetic variations related to grain type and heading date. The distribution of SNP and InDel on chromosomes is random, but they often occur in the up/downstream regions and the intergenic region. Mutagenesis can cause changes in transposons such as Dasheng, mPing, Osr13 and RIRE2, affecting the stability of the genome. This study obtained the major gene mutation types, discovered differentially active transposons, screened out gene variants related to phenotype, and explored the mechanism of high-energy heavy ion beam radiation on rice genes.
Collapse
Affiliation(s)
- Xiaoting Wen
- Key Laboratory of Soybean Molecular Design and Breeding, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; (X.W.); (F.Y.); (X.Z.); (Y.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jingpeng Li
- Key Laboratory of Soybean Molecular Design and Breeding, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; (X.W.); (F.Y.); (X.Z.); (Y.L.)
- Jilin Provincial Laboratory of Crop Germplasm Resources, Changchun 130299, China
| | - Fu Yang
- Key Laboratory of Soybean Molecular Design and Breeding, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; (X.W.); (F.Y.); (X.Z.); (Y.L.)
| | - Xin Zhang
- Key Laboratory of Soybean Molecular Design and Breeding, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; (X.W.); (F.Y.); (X.Z.); (Y.L.)
| | - Yiwei Li
- Key Laboratory of Soybean Molecular Design and Breeding, Northeast Institute of Geography and Agroecology, Chinese Academy of Sciences, Changchun 130102, China; (X.W.); (F.Y.); (X.Z.); (Y.L.)
- University of Chinese Academy of Sciences, Beijing 100049, China
| |
Collapse
|
2
|
Srinivasan N, Thangavelu K, Uthandi S. Lovastatin production by an oleaginous fungus, Aspergillus terreus KPR12 using sago processing wastewater (SWW). Microb Cell Fact 2022; 21:22. [PMID: 35164756 PMCID: PMC8842936 DOI: 10.1186/s12934-022-01751-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 01/25/2022] [Indexed: 12/19/2022] Open
Abstract
Abstract
Background
Lovastatin is one of the first statins to be extensively used for its cholesterol-lowering ability. It is commercially produced by fermentation. Species belonging to the genus Aspergillus are well-studied fungi that have been widely used for lovastatin production. In the present study, we produced lovastatin from sago processing wastewater (SWW) under submerged fermentation using oleaginous fungal strains, A. terreus KPR12 and A. caespitosus ASEF14.
Results
The intra- and extracellular concentrations of lovastatin produced by A. terreus KPR12 and A. caespitosus ASEF14 were lactonized. Because A. caespitosus ASEF14 produced a negligible amount of lovastatin, further kinetics of lovastatin production in SWW was studied using the KPR12 strain for 9 days. Lovastatin concentrations in the intra- and extracellular fractions of the A. terreus KPR12 cultured in a synthetic medium (SM) were 117.93 and 883.28 mg L–1, respectively. However, these concentrations in SWW were 142.23 and 429.98 mg L–1, respectively. The yeast growth inhibition bioassay confirmed the antifungal property of fungal extracts. A. terreus KPR12 showed a higher inhibition zone of 14 mm than the ASEF14 strain. The two-way analysis of variance (ANOVA; p < 0.01) showed significant differences in the localization pattern, fungal strains, growth medium, and their respective interactions. The lovastatin yield coefficient values were 0.153 g g–1 on biomass (YLOV/X) and 0.043 g g–1 on the substrate, starch (YLOV/S). The pollutant level of treated SWW exhibited a reduction in total solids (TS, 59%), total dissolved solids (TDS, 68%), biological oxygen demand (BOD, 79.5%), chemical oxygen demand (COD, 57.1%), phosphate (88%), cyanide (65.4%), and void of nutrients such as nitrate (100%), and ammonia (100%).
Conclusion
The starch-rich wastewater serves as a suitable medium for A. terreus KPR12 for the production of lovastatin. It simultaneously decontaminates the sago processing wastewater, enabling its reuse for irrigation/recreation.
Graphical Abstract
Collapse
|
3
|
Barrios-González J, Pérez-Sánchez A, Bibián ME. New knowledge about the biosynthesis of lovastatin and its production by fermentation of Aspergillus terreus. Appl Microbiol Biotechnol 2020; 104:8979-8998. [PMID: 32930839 DOI: 10.1007/s00253-020-10871-x] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 08/10/2020] [Accepted: 08/31/2020] [Indexed: 12/21/2022]
Abstract
Lovastatin, and its semisynthetic derivative simvastatine, has great medical and economic importance, besides great potential for other uses. In the last years, a deeper and more complex view of secondary metabolism regulation has emerged, with the incorporation of cluster-specific and global transcription factors, and their relation to signaling cascades, as well as the new level of epigenetic regulation. Recently, a new mechanism, which regulates lovastatin biosynthesis, at transcriptional level, has been discovered: reactive oxygen species (ROS) regulation; also new unexpected environmental stimuli have been identified, which induce the synthesis of lovastatin, like quorum sensing-type molecules and support stimuli. The present review describes this new panorama and uses this information, together with the knowledge on lovastatin biosynthesis and genomics, as the foundation to analyze literature on optimization of fermentation parameters and medium composition, and also to fully understand new strategies for strain genetic improvement. This new knowledge has been applied to the development of more effective culture media, with the addition of molecules like butyrolactone I, oxylipins, and spermidine, or with addition of ROS-generating molecules to increase internal ROS levels in the cell. It has also been applied to the development of new strategies to generate overproducing strains of Aspergillus terreus, including engineering of the cluster-specific transcription factor (lovE), global transcription factors like the ones implicated in ROS regulation (or even mitochondrial alternative respiration aox gen), or the global regulator LaeA. Moreover, there is potential to apply some of these findings to the development of novel unconventional production systems. KEY POINTS: • New findings in regulation of lovastatin biosynthesis, like ROS regulation. • Induction by unexpected stimuli: autoinducer molecules and support stimuli. • Recent reports on culture medium and process optimization from this stand point. • Applications to molecular genetic strain improvement methods and production systems.
Collapse
Affiliation(s)
- Javier Barrios-González
- Departamento de Biotecnología, Universidad Autónoma Metropolitana -Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, 09340, Iztapalapa, Ciudad de México, Mexico.
| | - Ailed Pérez-Sánchez
- Departamento de Biotecnología, Universidad Autónoma Metropolitana -Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, 09340, Iztapalapa, Ciudad de México, Mexico
| | - María Esmeralda Bibián
- Departamento de Biotecnología, Universidad Autónoma Metropolitana -Iztapalapa, Av. San Rafael Atlixco 186, Col. Vicentina, 09340, Iztapalapa, Ciudad de México, Mexico
| |
Collapse
|
4
|
Khonkhaeng B, Cherdthong A. Pleurotus Ostreatus and Volvariella Volvacea Can Enhance the Quality of Purple Field Corn Stover and Modulate Ruminal Fermentation and Feed Utilization in Tropical Beef Cattle. Animals (Basel) 2019; 9:E1084. [PMID: 31817269 PMCID: PMC6941118 DOI: 10.3390/ani9121084] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 11/27/2019] [Accepted: 12/03/2019] [Indexed: 01/05/2023] Open
Abstract
This objective is to elucidate the effect of purple field corn stover treated with Pleurotus ostreatus and Volvarialla volvacea on feed utilization, ruminal ecology, and CH4 synthesis in tropical beef cattle. Four male Thai native beef cattle (100 ± 30 kg of body weight (BW) were assigned randomly as a 2 × 2 factorial arrangement in a 4 × 4 Latin square design. Factor A (roughage sources) was rice straw and purple field corn stover and factor B was species of white-rot fungi (P. ostreatus and V. volvacea). After fermentation, crude protein (CP) was increased in rice straw and purple field corn stover fermented with P. ostreatus and V. volvacea. The unfermented purple field corn stover contained 11.8% dry matter (DM) of monomeric anthocyanin (MAC), whereas the MAC concentration decreased when purple field corn stover was fermented with white rot fungi. There were no changes (p > 0.05) in DM intake of body weight (BW) kg/d and g/kg BW0.75 among the four treatments. The organic matter (OM), CP, and acid detergent fiber (ADF) intake were different between rice straw and purple field corn stover and were the greatest in the purple field corn stover group. Moreover, the current study showed that neutral detergent fiber (NDF) and ADF digestion was higher in purple field corn stover than in rice straw, but there were no significant differences between P. ostreatus and V. volvacea. There were significant effects of roughage sources on ammonia nitrogen (NH3-N) at 4 h after feeding. Bacterial population was changed by feeding with purple field corn stover fermented with P. ostreatus and V. volvacea. On the other hand, the number of protozoa was reduced by approximately 33% at 4 h after feeding with purple field corn stover (p < 0.01). Propionic acid concentration was different between roughage sources (p < 0.01) enhanced with purple field corn stover fermented with P. ostreatus and V. volvacea. In addition, methane production decreased by 15% with purple field corn stover fermented with P. ostreatus and V. volvacea compared to rice straw. There were significant differences on all nitrogen balances parameters (p < 0.05), except the fecal N excretion (p > 0.05) were not changed. Furthermore, microbial crude protein and efficiency of microbial N synthesis were enhanced when purple field corn stover fermented with P. ostreatus and V. volvacea was fed compared to rice straw group. Base on this study, it could be summarized that P. ostreatus or V. volvacea can enhance the quality of purple field corn stover and modulate rumen fermentation and feed digestion in Thai native beef cattle.
Collapse
Affiliation(s)
| | - Anusorn Cherdthong
- Tropical Feed Resource Research and Development Center (TROFREC), Department of Animal Science Faculty of Agriculture, KKU, Khon Kaen 40002, Thailand;
| |
Collapse
|
5
|
Development and screening of mutants from Monascus sanguineus for secondary metabolites production. BENI-SUEF UNIVERSITY JOURNAL OF BASIC AND APPLIED SCIENCES 2018. [DOI: 10.1016/j.bjbas.2018.03.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
|
6
|
Jiang AL, Hu W, Li WJ, Liu L, Tian XJ, Liu J, Wang SY, Lu D, Chen JH. Enhanced production of l-lactic acid by Lactobacillus thermophilus SRZ50 mutant generated by high-linear energy transfer heavy ion mutagenesis. Eng Life Sci 2018; 18:626-634. [PMID: 32624942 DOI: 10.1002/elsc.201800052] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Revised: 04/11/2018] [Accepted: 05/02/2018] [Indexed: 12/17/2022] Open
Abstract
The aim of this study was to improve l-lactic acid production of Lactobacillus thermophilus SRZ50. For this purpose, high efficient heavy-ion mutagenesis technique was performed using SRZ50 as the original strain. To enhance the screening efficiency for high yield l-lactic acid producers, a scale-down from shake flask to microtiter plate was developed. The results showed that 24-well U-bottom MTPs could well alternate shake flasks for L. thermophilus cultivation as a scale-down tool due to its a very good comparability to the shake flasks. Based on this microtiter plate screening method, two high l-lactic acid productivity mutants, A59 and A69, were successfully screened out, which presented, respectively, 15.8 and 16.2% higher productivities than that of the original strain. Based on fed-batch fermentation, the A69 mutant can accumulate 114.2 g/L l-lactic acid at 96 h. Hence, the proposed traditional microbial breeding method with efficient high-throughput screening assay was proved to be an appropriate strategy to obtain lactic acid-overproducing strain.
Collapse
Affiliation(s)
- Ai-Lian Jiang
- Department of Biophysics Institute of Modern Physics Chinese Academy of Sciences Lanzhou P. R. China.,University of Chinese Academy of Sciences Beijing P. R. China
| | - Wei Hu
- Department of Biophysics Institute of Modern Physics Chinese Academy of Sciences Lanzhou P. R. China
| | - Wen-Jian Li
- Department of Biophysics Institute of Modern Physics Chinese Academy of Sciences Lanzhou P. R. China
| | - Lu Liu
- Department of Biophysics Institute of Modern Physics Chinese Academy of Sciences Lanzhou P. R. China.,University of Chinese Academy of Sciences Beijing P. R. China
| | - Xue-Jiao Tian
- Department of Biophysics Institute of Modern Physics Chinese Academy of Sciences Lanzhou P. R. China.,University of Chinese Academy of Sciences Beijing P. R. China
| | - Jing Liu
- Department of Biophysics Institute of Modern Physics Chinese Academy of Sciences Lanzhou P. R. China
| | - Shu-Yang Wang
- Department of Biophysics Institute of Modern Physics Chinese Academy of Sciences Lanzhou P. R. China
| | - Dong Lu
- Department of Biophysics Institute of Modern Physics Chinese Academy of Sciences Lanzhou P. R. China
| | - Ji-Hong Chen
- Department of Biophysics Institute of Modern Physics Chinese Academy of Sciences Lanzhou P. R. China
| |
Collapse
|
7
|
Song X, Zhang Y, Zhu X, Wang Y, Chu J, Zhuang Y. Mutation breeding of high avermectin B1a-producing strain by the combination of high energy carbon heavy ion irradiation and sodium nitrite mutagenesis based on high throughput screening. BIOTECHNOL BIOPROC E 2017. [DOI: 10.1007/s12257-017-0022-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
|
8
|
Hu W, Li W, Chen J. Recent advances of microbial breeding via heavy-ion mutagenesis at IMP. Lett Appl Microbiol 2017; 65:274-280. [PMID: 28741678 DOI: 10.1111/lam.12780] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Revised: 07/11/2017] [Accepted: 07/17/2017] [Indexed: 12/12/2022]
Abstract
Nowadays, the value of heavy-ion mutagenesis has been accepted as a novel powerful mutagen technique to generate new microbial mutants due to its high linear energy transfer and high relative biological effectiveness. This paper briefly reviews recent progress in developing a more efficient mutagenesis technique for microbial breeding using heavy-ion mutagenesis, and also presents the outline of the beam line for microbial breeding in Heavy Ion Research Facility of Lanzhou. Then, new insights into microbial biotechnology via heavy-ion mutagenesis are also further explored. We hope that our concerns will give deep insight into microbial breeding biotechnology via heavy-ion mutagenesis. We also believe that heavy-ion mutagenesis breeding will greatly contribute to the progress of a comprehensive study industrial strain engineering for bioindustry in the future. SIGNIFICANCE AND IMPACT OF THE STUDY There is currently a great interest in developing rapid and diverse microbial mutation tool for strain modification. Heavy-ion mutagenesis has been proved as a powerful technology for microbial breeding due to its broad spectrum of mutation phenotypes with high efficiency. In order to deeply understand heavy-ion mutagenesis technology, this paper briefly reviews recent progress in microbial breeding using heavy-ion mutagenesis at IMP, and also presents the outline of the beam line for microbial breeding in Heavy Ion Research Facility of Lanzhou (HIRFL) as well as new insights into microbial biotechnology via heavy-ion mutagenesis. Thus, this work can provide the guidelines to promote the development of novel microbial biotechnology cross-linking heavy-ion mutagenesis breeding that could make breeding process more efficiently in the future.
Collapse
Affiliation(s)
- W Hu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - W Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| | - J Chen
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou, China
| |
Collapse
|
9
|
Hu W, Li W, Chen H, Liu J, Wang S, Chen J. Changes in transcript levels of starch hydrolysis genes and raising citric acid production via carbon ion irradiation mutagenesis of Aspergillus niger. PLoS One 2017. [PMID: 28650980 PMCID: PMC5484496 DOI: 10.1371/journal.pone.0180120] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
The filamentous ascomycete Aspergillus niger is well known for its ability to accumulate citric acid for the hydrolysis of starchy materials. To improve citric acid productivity, heavy ion beam mutagenesis was utilized to produce mutant A.niger strains with enhanced production of citric acid in this work. It was demonstrated that a mutant HW2 with high concentration of citric acid was isolated after carbon ion irradiation with the energy of 80Mev/μ, which was obvious increase higher than the original strain from liquefied corn starch as a feedstock. More importantly, with the evidence from the expression profiles of key genes and enzyme activity involved in the starch hydrolysis process between original strain and various phenotype mutants, our results confirmed that different transcript levels of key genes involving in starch hydrolysis process between original strain and mutants could be a significant contributor to different citric acid concentration in A.niger, such as, amyR and glaA, which therefore opened a new avenue for constructing genetically engineered A.niger mutants for high-yield citric acid accumulation in the future. As such, this work demonstrated that heavy ion beam mutagenesis presented an efficient alternative strategy to be developed to generate various phenotype microbe species mutants for functional genes research.
Collapse
Affiliation(s)
- Wei Hu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou city, Gansu Province, China
- * E-mail: (WH); (JC)
| | - Wenjian Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou city, Gansu Province, China
| | - Hao Chen
- College of food science and engineering, Gansu Agricultural University, Lanzhou city, Gansu Province, China
| | - Jing Liu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou city, Gansu Province, China
| | - Shuyang Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou city, Gansu Province, China
| | - Jihong Chen
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou city, Gansu Province, China
- * E-mail: (WH); (JC)
| |
Collapse
|
10
|
Subhan M, Faryal R, Macreadie I. Exploitation of Aspergillus terreus for the Production of Natural Statins. J Fungi (Basel) 2016; 2:jof2020013. [PMID: 29376930 PMCID: PMC5753075 DOI: 10.3390/jof2020013] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 04/19/2016] [Accepted: 04/26/2016] [Indexed: 01/29/2023] Open
Abstract
The fungus Aspergillus (A.) terreus has dominated the biological production of the “blockbuster” drugs known as statins. The statins are a class of drugs that inhibit HMG-CoA reductase and lead to lower cholesterol production. The statins were initially discovered in fungi and for many years fungi were the sole source for the statins. At present, novel chemically synthesised statins are produced as inspired by the naturally occurring statin molecules. The isolation of the natural statins, compactin, mevastatin and lovastatin from A. terreus represents one of the great achievements of industrial microbiology. Here we review the discovery of statins, along with strategies that have been applied to scale up their production by A. terreus strains. The strategies encompass many of the techniques available in industrial microbiology and include the optimization of media and fermentation conditions, the improvement of strains through classical mutagenesis, induced genetic manipulation and the use of statistical design.
Collapse
Affiliation(s)
- Mishal Subhan
- Department of Microbiology, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan.
| | - Rani Faryal
- Department of Microbiology, Faculty of Biological Sciences, Quaid-i-Azam University, Islamabad 45320, Pakistan.
| | - Ian Macreadie
- School of Science, RMIT University, Bundoora, Victoria 3083, Australia.
| |
Collapse
|
11
|
Hu W, Chen JH, Wang SY, Liu J, Song Y, Wu QF, Li WJ. Changes in the physiological properties and kinetics of citric acid accumulation via carbon ion irradiation mutagenesis of Aspergillus niger. J Zhejiang Univ Sci B 2016. [DOI: 10.1631/jzus.b1500120] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
12
|
Lovastatin production: From molecular basis to industrial process optimization. Biotechnol Adv 2015; 33:648-65. [PMID: 25868803 DOI: 10.1016/j.biotechadv.2015.04.001] [Citation(s) in RCA: 74] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 04/04/2015] [Accepted: 04/05/2015] [Indexed: 12/22/2022]
Abstract
Lovastatin, composed of secondary metabolites produced by filamentous fungi, is the most frequently used drug for hypercholesterolemia treatment due to the fact that lovastatin is a competitive inhibitor of HMG-CoA reductase. Moreover, recent studies have shown several important applications for lovastatin including antimicrobial agents and treatments for cancers and bone diseases. Studies regarding the lovastatin biosynthetic pathway have also demonstrated that lovastatin is synthesized from two-chain reactions using acetate and malonyl-CoA as a substrate. It is also known that there are two key enzymes involved in the biosynthetic pathway called polyketide synthases (PKS). Those are characterized as multifunctional enzymes and are encoded by specific genes organized in clusters on the fungal genome. Since it is a secondary metabolite, cultivation process optimization for lovastatin biosynthesis has included nitrogen limitation and non-fermentable carbon sources such as lactose and glycerol. Additionally, the influences of temperature, pH, agitation/aeration, and particle and inoculum size on lovastatin production have been also described. Although many reviews have been published covering different aspects of lovastatin production, this review brings, for the first time, complete information about the genetic basis for lovastatin production, detection and quantification, strain screening and cultivation process optimization. Moreover, this review covers all the information available from patent databases covering each protected aspect during lovastatin bio-production.
Collapse
|
13
|
Creation of an ethanol-tolerant Saccharomyces cerevisiae strain by 266 nm laser radiation and repetitive cultivation. J Biosci Bioeng 2014; 118:508-13. [DOI: 10.1016/j.jbiosc.2014.04.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2013] [Revised: 03/26/2014] [Accepted: 04/22/2014] [Indexed: 11/23/2022]
|
14
|
Li SW, Song HP, Leng Y. Rapid determination of lovastatin in the fermentation broth of Aspergillus terreus using dual-wavelength UV spectrophotometry. PHARMACEUTICAL BIOLOGY 2014; 52:129-135. [PMID: 24093797 DOI: 10.3109/13880209.2013.833947] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
CONTEXT Lovastatin, a hypocholesterolemic drug, is produced by submerged fermentation of Aspergillus terreus Thom (Trichocomaceae). High performance liquid chromatography is usually used to determine lovastatin in samples of the fermentation broth. However, this method is inconvenient and costly, especially in the context of high-throughput sample analysis. OBJECTIVE A direct and simple dual-wavelength ultraviolet spectrophotometric method for quantifying lovastatin in the fermentation broth of A. terreus was developed. MATERIALS AND METHODS A. terreus Z15-7 was used for all experiments. The liquid fermentation was conducted at 30 °C in a rotary shaker at 150 rpm for 15 d. Silica gel and neutral alumina column chromatography were used for the separation and purification of lovastatin from the fermentation broth. RESULTS The limits of detection of lovastatin were 0.320 μg/ml in the lovastatin standard solution and 0.490 μg/ml in the fermentation broth sample and the limits of quantification of lovastatin were 1.265 μg/ml in the lovastatin standard solution and 3.955 μg/ml in the fermentation broth sample. The amounts of lovastatin in the fermentation broth ranged from 876.614 to 911.967 μg/ml, with relative standard deviations from 1.203 to 1.709%. The mean recoveries of lovastatin using silica gel and neutral alumina column chromatography were 84.2 ± 0.82 and 87.2 ± 0.21%, respectively. DISCUSSION AND CONCLUSION Dual-wavelength UV spectrophotometry is a rapid, sensitive, accurate, and convenient method for quantifying lovastatin in fermentation broth. Neutral alumina column chromatography is more efficient than silica gel column chromatography for the purification and determination lovastatin using the developed dual-wavelength UV spectrophotometry method.
Collapse
Affiliation(s)
- Shi-Weng Li
- School of Chemical and Biological Engineering, Lanzhou Jiaotong University , Lanzhou , China
| | | | | |
Collapse
|
15
|
Singh SK, Pandey A. Emerging Approaches in Fermentative Production of Statins. Appl Biochem Biotechnol 2013; 171:927-38. [DOI: 10.1007/s12010-013-0400-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2013] [Accepted: 07/15/2013] [Indexed: 01/21/2023]
|
16
|
Lu LP, Zhang BB, Xu GR. Efficient conversion of high concentration of glycerol to Monacolin K by solid-state fermentation of Monascus purpureus using bagasse as carrier. Bioprocess Biosyst Eng 2013; 36:293-9. [PMID: 22833225 DOI: 10.1007/s00449-012-0784-3] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2012] [Accepted: 06/29/2012] [Indexed: 01/24/2023]
Abstract
High concentration of glycerol was used as the sole carbon source for efficient production of Monacolin K (MK) by solid-state fermentation (SSF) of Monascus purpureus 9901 using agricultural residue (bagasse), as an inert carrier. A comparative study showed that MK production in SSF was about 5.5 times higher than that of submerged fermentation when 26 % of glycerol was used, which may be due to the formation of glycerol concentration gradients in the inert carrier and less catabolite repression in SSF. For enhancement of MK yield in SSF, the effects of different influential variables, such as glycerol concentration, nitrogen source and its concentration, initial moisture content, inoculum size and particle size of bagasse, were systematically examined. All the factors mentioned above had an effect on the MK production in SSF to some extent. The maximal yield of MK (12.9 mg/g) was achieved with 26 % glycerol, 5 % soybean meal, 51 % initial moisture content, 20 % inoculum size and 1 mm particle size of bagasse. The results in this study may expand our understanding on the application of SSF using agricultural residue as carrier for production of useful microbial metabolites, especially the efficient conversion of high concentration of glycerol to MK by Monascus purpureus.
Collapse
Affiliation(s)
- Li-Ping Lu
- Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, 214122, China.
| | | | | |
Collapse
|
17
|
Zhang M, Zhu R, Zhang M, Gao B, Sun D, Wang S. High-energy pulse-electron-beam-induced molecular and cellular damage in Saccharomyces cerevisiae. Res Microbiol 2013; 164:100-9. [DOI: 10.1016/j.resmic.2012.10.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2012] [Accepted: 10/25/2012] [Indexed: 10/27/2022]
|