1
|
Guluarte C, Reyes-Becerril M, Gonzalez-Silvera D, Cuesta A, Angulo C, Esteban MÁ. Probiotic properties and fatty acid composition of the yeast Kluyveromyces lactis M3. In vivo immunomodulatory activities in gilthead seabream (Sparus aurata). FISH & SHELLFISH IMMUNOLOGY 2019; 94:389-397. [PMID: 31520749 DOI: 10.1016/j.fsi.2019.09.024] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 08/30/2019] [Accepted: 09/10/2019] [Indexed: 06/10/2023]
Abstract
The aim of this study was to analyze the probiotic potential, fatty acid composition and immunostimulant activities of Kluyveromyces lactis M3 isolated from a hypersaline sediment. For this purpose, K. lactis M3 resistance to different pH, salinities and bile, as well as its antioxidant capability were assayed. Furthermore, total fatty acid composition of the yeast was determined where the dominant fatty acids were palmitic, palmitoleic, oleic and linoleic acids. K. lactis M3 showed no cytotoxic effects on peripheral blood leukocytes. During an in vivo experiment in gilthead seabream (Sparus aurata), dietary K. lactis M3 supplemented at 0.55 or 1.1% of the basal diet enhanced bactericidal activity against Vibrio parahaemolyticus N16, V. harveyi Lg 16/00, and V. anguillarum CECT 43442 compared to fish fed commercial diet (control group). Finally, nitric oxide production, peroxidase activity and skin mucus lectin union levels strongly increased in fish fed K. lactis M3 with respect to the control group. The results suggested that the yeast K. lactis M3 had exhibited high antioxidant capability, and its dietary administration at 0.55 or 1% basal diet had immunostimulant activity for gilthead seabream. For all these reasons, it should be considered an appropriate probiotic candidate for the aquaculture fish industry.
Collapse
Affiliation(s)
- Crystal Guluarte
- Immunology & Vaccinology Group, Centro de Investigaciones Biológicas Del Noroeste (CIBNOR), Av. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, B.C.S, 23096, Mexico
| | - Martha Reyes-Becerril
- Immunology & Vaccinology Group, Centro de Investigaciones Biológicas Del Noroeste (CIBNOR), Av. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, B.C.S, 23096, Mexico
| | - Daniel Gonzalez-Silvera
- Fish Innate Immune System Group, Department of Cell Biology and Histology, Faculty of Biology, Universidad de Murcia, 30100, Murcia, Spain
| | - Alberto Cuesta
- Fish Innate Immune System Group, Department of Cell Biology and Histology, Faculty of Biology, Universidad de Murcia, 30100, Murcia, Spain
| | - Carlos Angulo
- Immunology & Vaccinology Group, Centro de Investigaciones Biológicas Del Noroeste (CIBNOR), Av. Instituto Politécnico Nacional 195, Playa Palo de Santa Rita Sur, La Paz, B.C.S, 23096, Mexico
| | - María Ángeles Esteban
- Fish Innate Immune System Group, Department of Cell Biology and Histology, Faculty of Biology, Universidad de Murcia, 30100, Murcia, Spain.
| |
Collapse
|
2
|
Gündüz Ergün B, Hüccetoğulları D, Öztürk S, Çelik E, Çalık P. Established and Upcoming Yeast Expression Systems. Methods Mol Biol 2019; 1923:1-74. [PMID: 30737734 DOI: 10.1007/978-1-4939-9024-5_1] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Yeast was the first microorganism used by mankind for biotransformation of feedstock that laid the foundations of industrial biotechnology. Long historical use, vast amount of data, and experience paved the way for Saccharomyces cerevisiae as a first yeast cell factory, and still it is an important expression platform as being the production host for several large volume products. Continuing special needs of each targeted product and different requirements of bioprocess operations have led to identification of different yeast expression systems. Modern bioprocess engineering and advances in omics technology, i.e., genomics, transcriptomics, proteomics, secretomics, and interactomics, allow the design of novel genetic tools with fine-tuned characteristics to be used for research and industrial applications. This chapter focuses on established and upcoming yeast expression platforms that have exceptional characteristics, such as the ability to utilize a broad range of carbon sources or remarkable resistance to various stress conditions. Besides the conventional yeast S. cerevisiae, established yeast expression systems including the methylotrophic yeasts Pichia pastoris and Hansenula polymorpha, the dimorphic yeasts Arxula adeninivorans and Yarrowia lipolytica, the lactose-utilizing yeast Kluyveromyces lactis, the fission yeast Schizosaccharomyces pombe, and upcoming yeast platforms, namely, Kluyveromyces marxianus, Candida utilis, and Zygosaccharomyces bailii, are compiled with special emphasis on their genetic toolbox for recombinant protein production.
Collapse
Affiliation(s)
- Burcu Gündüz Ergün
- Biochemical Reaction Engineering Laboratory, Department of Chemical Engineering, Middle East Technical University, Ankara, Turkey
| | - Damla Hüccetoğulları
- Biochemical Reaction Engineering Laboratory, Department of Chemical Engineering, Middle East Technical University, Ankara, Turkey
| | - Sibel Öztürk
- Biochemical Reaction Engineering Laboratory, Department of Chemical Engineering, Middle East Technical University, Ankara, Turkey
| | - Eda Çelik
- Department of Chemical Engineering, Hacettepe University, Ankara, Turkey
- Bioengineering Division, Institute of Science, Hacettepe University, Ankara, Turkey
| | - Pınar Çalık
- Biochemical Reaction Engineering Laboratory, Department of Chemical Engineering, Middle East Technical University, Ankara, Turkey.
- Industrial Biotechnology and Metabolic Engineering Laboratory, Department of Biotechnology, Graduate School of Natural and Applied Sciences, Middle East Technical University, Ankara, Turkey.
| |
Collapse
|
3
|
Liu Y, Mo WJ, Shi TF, Wang MZ, Zhou JG, Yu Y, Yew WS, Lu H. Mutational Mtc6p attenuates autophagy and improves secretory expression of heterologous proteins in Kluyveromyces marxianus. Microb Cell Fact 2018; 17:144. [PMID: 30217195 PMCID: PMC6138896 DOI: 10.1186/s12934-018-0993-9] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2018] [Accepted: 09/08/2018] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND The yeast Kluyveromyces marxianus is an emerging cell factory for heterologous protein biosynthesis and its use holds tremendous advantages for multiple applications. However, which genes influence the productivity of desired proteins in K. marxianus has so far been investigated by very few studies. RESULTS In this study, we constructed a K. marxianus recombinant (FIM1/Est1E), which expressed the heterologous ruminal feruloyl esterase Est1E as reporter. UV-60Co-γ irradiation mutagenesis was performed on this recombinant, and one mutant (be termed as T1) was screened and reported, in which the productivity of heterologous Est1E was increased by at least tenfold compared to the parental FIM1/Est1E recombinant. Transcriptional perturbance was profiled and presented that the intracellular vesicle trafficking was enhanced while autophagy be weakened in the T1 mutant. Moreover, whole-genome sequencing combined with CRISPR/Cas9 mediated gene-editing identified a novel functional protein Mtc6p, which was prematurely terminated at Tyr251 by deletion of a single cytosine at 755 loci of its ORF in the T1 mutant. We found that deleting C755 of MTC6 in FIM1 led to 4.86-fold increase in the production of Est1E compared to FIM1, while the autophagy level decreased by 47%; on the contrary, when reinstating C755 of MTC6 in the T1 mutant, the production of Est1E decreased by 66% compared to T1, while the autophagy level increased by 124%. Additionally, in the recombinant with attenuated autophagy (i.e., FIM1 mtc6C755Δ and T1) or interdicted autophagy (i.e., FIM1 atg1Δ and T1 atg1Δ), the productivity of three other heterologous proteins was also increased, specifically the heterologous mannase Man330, the β-1,4-endoxylanase XynCDBFV or the conventional EGFP. CONCLUSIONS Our results demonstrated that Mtc6p was involved in regulating autophagy; attenuating or interdicting autophagy would dramatically improve the yields of desired proteins in K. marxianus, and this modulation could be achieved by focusing on the premature mutation of Mtc6p target.
Collapse
Affiliation(s)
- Yang Liu
- State Key Laboratory of Genetic Engineering, School of Life Science, Fudan University, Shanghai, 200438, People's Republic of China.,Shanghai Engineering Research Center of Industrial Microorganisms, Shanghai, 200438, People's Republic of China
| | - Wen-Juan Mo
- State Key Laboratory of Genetic Engineering, School of Life Science, Fudan University, Shanghai, 200438, People's Republic of China.,Shanghai Engineering Research Center of Industrial Microorganisms, Shanghai, 200438, People's Republic of China
| | - Tian-Fang Shi
- State Key Laboratory of Genetic Engineering, School of Life Science, Fudan University, Shanghai, 200438, People's Republic of China.,Shanghai Engineering Research Center of Industrial Microorganisms, Shanghai, 200438, People's Republic of China
| | - Meng-Zhu Wang
- State Key Laboratory of Genetic Engineering, School of Life Science, Fudan University, Shanghai, 200438, People's Republic of China.,Shanghai Engineering Research Center of Industrial Microorganisms, Shanghai, 200438, People's Republic of China
| | - Jun-Gang Zhou
- State Key Laboratory of Genetic Engineering, School of Life Science, Fudan University, Shanghai, 200438, People's Republic of China.,Shanghai Engineering Research Center of Industrial Microorganisms, Shanghai, 200438, People's Republic of China
| | - Yao Yu
- State Key Laboratory of Genetic Engineering, School of Life Science, Fudan University, Shanghai, 200438, People's Republic of China.,Shanghai Engineering Research Center of Industrial Microorganisms, Shanghai, 200438, People's Republic of China
| | - Wen-Shan Yew
- NUS Synthetic Biology for Clinical and Technological Innovation, 28 Medical Drive, Singapore, 117456, Singapore.,Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, 8 Medical Drive, Singapore, 117597, Singapore
| | - Hong Lu
- State Key Laboratory of Genetic Engineering, School of Life Science, Fudan University, Shanghai, 200438, People's Republic of China. .,Shanghai Engineering Research Center of Industrial Microorganisms, Shanghai, 200438, People's Republic of China.
| |
Collapse
|
4
|
Gombert AK, Madeira JV, Cerdán ME, González-Siso MI. Kluyveromyces marxianus as a host for heterologous protein synthesis. Appl Microbiol Biotechnol 2016; 100:6193-6208. [PMID: 27260286 DOI: 10.1007/s00253-016-7645-y] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2016] [Revised: 05/22/2016] [Accepted: 05/25/2016] [Indexed: 01/08/2023]
Abstract
The preferentially respiring and thermotolerant yeast Kluyveromyces marxianus is an emerging host for heterologous protein synthesis, surpassing the traditional preferentially fermenting yeast Saccharomyces cerevisiae in some important aspects: K . marxianus can grow at temperatures 10 °C higher than S. cerevisiae, which may result in decreased costs for cooling bioreactors and reduced contamination risk; has ability to metabolize a wider variety of sugars, such as lactose and xylose; is the fastest growing eukaryote described so far; and does not require special cultivation techniques (such as fed-batch) to avoid fermentative metabolism. All these advantages exist together with a high secretory capacity, performance of eukaryotic post-translational modifications, and with a generally regarded as safe (GRAS) status. In the last years, replication origins from several Kluyveromyces spp. have been used for the construction of episomal vectors, and also integrative strategies have been developed based on the tendency for non-homologous recombination displayed by K. marxianus. The recessive URA3 auxotrophic marker and the dominant Kan(R) are mostly used for selection of transformed cells, but other markers have been made available. Homologous and heterologous promoters and secretion signals have been characterized, with the K. marxianus INU1 expression and secretion system being of remarkable functionality. The efficient synthesis of roughly 50 heterologous proteins has been demonstrated, including one thermophilic enzyme. In this mini-review, we summarize the physiological characteristics of K. marxianus relevant for its use in the efficient synthesis of heterologous proteins, the efforts performed hitherto in the development of a molecular toolbox for this purpose, and some successful examples.
Collapse
Affiliation(s)
- Andreas K Gombert
- School of Food Engineering, University of Campinas, Rua Monteiro Lobato, 80, Campinas, SP, 13083-862, Brazil
| | - José Valdo Madeira
- School of Food Engineering, University of Campinas, Rua Monteiro Lobato, 80, Campinas, SP, 13083-862, Brazil
| | - María-Esperanza Cerdán
- Grupo EXPRELA, Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Bioloxía Celular e Molecular, Facultade de Ciencias, Universidade da Coruña, Campus de A Coruña, 15071, A Coruña, Spain
| | - María-Isabel González-Siso
- Grupo EXPRELA, Centro de Investigacións Científicas Avanzadas (CICA), Departamento de Bioloxía Celular e Molecular, Facultade de Ciencias, Universidade da Coruña, Campus de A Coruña, 15071, A Coruña, Spain.
| |
Collapse
|
5
|
Abrashev R, Feller G, Kostadinova N, Krumova E, Alexieva Z, Gerginova M, Spasova B, Miteva-Staleva J, Vassilev S, Angelova M. Production, purification, and characterization of a novel cold-active superoxide dismutase from the Antarctic strain Aspergillus glaucus 363. Fungal Biol 2016; 120:679-89. [DOI: 10.1016/j.funbio.2016.03.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2016] [Revised: 02/29/2016] [Accepted: 03/04/2016] [Indexed: 02/07/2023]
|
6
|
Spohner SC, Schaum V, Quitmann H, Czermak P. Kluyveromyces lactis: An emerging tool in biotechnology. J Biotechnol 2016; 222:104-16. [DOI: 10.1016/j.jbiotec.2016.02.023] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2015] [Revised: 02/05/2016] [Accepted: 02/15/2016] [Indexed: 02/04/2023]
|
7
|
Lertwattanasakul N, Kosaka T, Hosoyama A, Suzuki Y, Rodrussamee N, Matsutani M, Murata M, Fujimoto N, Tsuchikane K, Limtong S, Fujita N, Yamada M. Genetic basis of the highly efficient yeast Kluyveromyces marxianus: complete genome sequence and transcriptome analyses. BIOTECHNOLOGY FOR BIOFUELS 2015; 8:47. [PMID: 25834639 PMCID: PMC4381506 DOI: 10.1186/s13068-015-0227-x] [Citation(s) in RCA: 113] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/16/2014] [Accepted: 02/19/2015] [Indexed: 05/07/2023]
Abstract
BACKGROUND High-temperature fermentation technology with thermotolerant microbes has been expected to reduce the cost of bioconversion of cellulosic biomass to fuels or chemicals. Thermotolerant Kluyveromyces marxianus possesses intrinsic abilities to ferment and assimilate a wide variety of substrates including xylose and to efficiently produce proteins. These capabilities have been found to exceed those of the traditional ethanol producer Saccharomyces cerevisiae or lignocellulose-bioconvertible ethanologenic Scheffersomyces stipitis. RESULTS The complete genome sequence of K. marxianus DMKU 3-1042 as one of the most thermotolerant strains in the same species has been determined. A comparison of its genomic information with those of other yeasts and transcriptome analysis revealed that the yeast bears beneficial properties of temperature resistance, wide-range bioconversion ability, and production of recombinant proteins. The transcriptome analysis clarified distinctive metabolic pathways under three different growth conditions, static culture, high temperature, and xylose medium, in comparison to the control condition of glucose medium under a shaking condition at 30°C. Interestingly, the yeast appears to overcome the issue of reactive oxygen species, which tend to accumulate under all three conditions. CONCLUSIONS This study reveals many gene resources for the ability to assimilate various sugars in addition to species-specific genes in K. marxianus, and the molecular basis of its attractive traits for industrial applications including high-temperature fermentation. Especially, the thermotolerance trait may be achieved by an integrated mechanism consisting of various strategies. Gene resources and transcriptome data of the yeast are particularly useful for fundamental and applied researches for innovative applications.
Collapse
Affiliation(s)
- Noppon Lertwattanasakul
- />Applied Molecular Bioscience, Graduate School of Medicine, Yamaguchi University, Ube, 755-8505 Japan
- />Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok, 10900 Thailand
| | - Tomoyuki Kosaka
- />Department of Biological Chemistry, Faculty of Agriculture, Yamaguchi University, Yamaguchi, 753-8515 Japan
| | - Akira Hosoyama
- />National Institute of Technology and Evaluation, Shibuya-ku, Tokyo 151-0066 Japan
| | - Yutaka Suzuki
- />Department of Medical Genome Sciences, The University of Tokyo, Chiba, 277-8562 Japan
| | - Nadchanok Rodrussamee
- />Applied Molecular Bioscience, Graduate School of Medicine, Yamaguchi University, Ube, 755-8505 Japan
- />Department of Biology, Faculty of Science, Chiang Mai University, Chiang Mai, 50200 Thailand
| | - Minenosuke Matsutani
- />Department of Biological Chemistry, Faculty of Agriculture, Yamaguchi University, Yamaguchi, 753-8515 Japan
| | - Masayuki Murata
- />Applied Molecular Bioscience, Graduate School of Medicine, Yamaguchi University, Ube, 755-8505 Japan
| | - Naoko Fujimoto
- />Applied Molecular Bioscience, Graduate School of Medicine, Yamaguchi University, Ube, 755-8505 Japan
| | - Keiko Tsuchikane
- />National Institute of Technology and Evaluation, Shibuya-ku, Tokyo 151-0066 Japan
| | - Savitree Limtong
- />Department of Microbiology, Faculty of Science, Kasetsart University, Bangkok, 10900 Thailand
| | - Nobuyuki Fujita
- />National Institute of Technology and Evaluation, Shibuya-ku, Tokyo 151-0066 Japan
| | - Mamoru Yamada
- />Applied Molecular Bioscience, Graduate School of Medicine, Yamaguchi University, Ube, 755-8505 Japan
- />Department of Biological Chemistry, Faculty of Agriculture, Yamaguchi University, Yamaguchi, 753-8515 Japan
| |
Collapse
|
8
|
Almeida CM, Gomes D, Faro C, Simões I. Engineering a cardosin B-derived rennet for sheep and goat cheese manufacture. Appl Microbiol Biotechnol 2014; 99:269-81. [DOI: 10.1007/s00253-014-5902-5] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Revised: 06/11/2014] [Accepted: 06/16/2014] [Indexed: 01/26/2023]
|
9
|
Raimondi S, Zanni E, Amaretti A, Palleschi C, Uccelletti D, Rossi M. Thermal adaptability of Kluyveromyces marxianus in recombinant protein production. Microb Cell Fact 2013; 12:34. [PMID: 23587421 PMCID: PMC3655038 DOI: 10.1186/1475-2859-12-34] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 03/26/2013] [Indexed: 01/16/2023] Open
Abstract
Background Kluyveromyces marxianus combines the ease of genetic manipulation and fermentation with the ability to efficiently secrete high molecular weight proteins, performing eukaryotic post-translational modifications. It is able to grow efficiently in a wide range of temperatures. The secretion performances were analyzed in the host K. marxianus L3 in the range between 5°C and 40°C by means of 3 different reporter proteins, since temperature appears a key parameter for production and secretion of recombinant proteins. Results The recombinant strains were able to grow up to 40°C and, along the tested temperature interval (5-40°C), the specific growth rates (μ) were generally lower as compared to those of the untransformed strain. Biomass yields were slightly affected by temperature, with the highest values reached at 15°C and 30°C. The secretion of the endogenous β-fructofuranosidase, used as an internal control, was efficient in the range of the tested temperature, as evaluated by assaying the enzyme activity in the culture supernatants. The endogenous β-fructofuranosidase production was temperature dependent, with the highest yield at 30°C. The heterologous proteins HSA, GAA and Sod1p were all successfully produced and secreted between 5°C and 40°C, albeit each one presented a different optimal production temperature (15, 40, 5-30°C for HSA, GAA and Sod1p, respectively). Conclusions K. marxianus L3 has been identified as a promising and flexible cell factory. In a sole host, the optimization of growth temperatures for the efficient secretion of each individual protein can be carried out over a wide range of temperatures.
Collapse
Affiliation(s)
- Stefano Raimondi
- Department of Life Sciences, University of Modena and Reggio Emilia, Modena, Italy
| | | | | | | | | | | |
Collapse
|
10
|
Production of recombinant proteins by yeast cells. Biotechnol Adv 2012; 30:1108-18. [DOI: 10.1016/j.biotechadv.2011.09.011] [Citation(s) in RCA: 234] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2011] [Revised: 09/12/2011] [Accepted: 09/17/2011] [Indexed: 01/14/2023]
|
11
|
Formation of ethyl acetate by Kluyveromyces marxianus on whey during aerobic batch cultivation at specific trace element limitation. Appl Microbiol Biotechnol 2012; 96:1313-23. [PMID: 22573271 DOI: 10.1007/s00253-012-4107-z] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2012] [Revised: 03/13/2012] [Accepted: 04/14/2012] [Indexed: 01/25/2023]
Abstract
Kluyveromyces marxianus is able to transform lactose into ethyl acetate as a bulk product which offers a chance for an economical reuse of whey-borne sugar. Ethyl acetate is highly volatile and allows its process-integrated recovery by stripping from the aerated bioreactor. Extensive formation of ethyl acetate by K. marxianus DSM 5422 required restriction of yeast growth by a lack of trace elements. Several aerobic batch processes were done in a 1-L stirred reactor using whey-borne culture medium supplemented with an individual trace element solution excluding Mn, Mo, Fe, Cu, or Zn for identifying the trace element(s) crucial for the observed ester synthesis. Only a lack of Fe, Cu, or Zn restricted yeast growth while exclusion of Mn and Mo did not exhibit any effect due to a higher amount of the latter in the used whey. Limitation of growth by Fe or Cu caused significant production of ethyl acetate while limitation by Zn resulted in formation of ethanol. A lack of Fe or Cu obviously makes the respiratory chain inefficient resulting in an increased mitochondrial NADH level followed by a reduced metabolic flux of acetyl-SCoA into the citrate cycle. Synthesis of ethyl acetate from acetyl-SCoA and ethanol by alcoholysis is thus interpreted as an overflow metabolism.
Collapse
|
12
|
Carberry S, Molloy E, Hammel S, O’Keeffe G, Jones GW, Kavanagh K, Doyle S. Gliotoxin effects on fungal growth: Mechanisms and exploitation. Fungal Genet Biol 2012; 49:302-12. [DOI: 10.1016/j.fgb.2012.02.003] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2011] [Revised: 02/09/2012] [Accepted: 02/10/2012] [Indexed: 10/28/2022]
|
13
|
Dolashka P, Moshtanska V, Dolashki A, Velkova L, Rao GS, Angelova M, Betzel C, Voelter W, Atanasov B. Structural analysis and molecular modelling of the Cu/Zn-SOD from fungal strain Humicola lutea 103. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2011; 83:67-73. [PMID: 21907612 DOI: 10.1016/j.saa.2011.07.048] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Accepted: 07/13/2011] [Indexed: 05/31/2023]
Abstract
The native form of Cu/Zn-superoxide dismutase, isolated from fungal strain Humicola lutea 103 is a homodimer that coordinates one Cu(2+) and one Zn(2+) per monomer. Cu(2+) and Zn(2+) ions play crucial roles in enzyme activity and structural stability, respectively. It was established that HLSOD shows high pH and temperature stability. Thermostability of the glycosylated enzyme Cu/Zn-SOD, isolated from fungal strain H. lutea 103, was determined by CD spectroscopy. Determination of reversibility toward thermal denaturation for HLSOD allowed several thermodynamic parameters to be calculated. In this communication we report the conditions under which reversible denaturation of HLSOD exists. The narrow range over which the system is reversible has been determined using the strongest test of two important thermodynamic independent variables (T and pH). Combining both these variables, the "phase diagram" was determined, as a result of which the real thermodynamic parameters (ΔC(p), ΔH(exp)°, and ΔG(exp)°) was established. Because very narrow pH-interval of transitions we assume they are as result of overlapping of two simple transitions. It was found that ΔH(o) is independent from pH with a value of 1.3 kcal/mol and 2.8 kcal/mol for the first and the second transition, respectively. ΔG(o) was pH-dependent in all studied pH-interval. This means that the transitions are entropically driven, these. Based on this, these processes can be described as hydrophobic rearrangement of the quaternary structure. It was also found that glycosylation does not influence the stability of the enzyme because the carbohydrate chain is exposed on the surface of the molecule.
Collapse
Affiliation(s)
- Pavlina Dolashka
- Institute of Organic Chemistry, Bulgarian Academy of Sciences, Sofia, Bulgaria.
| | | | | | | | | | | | | | | | | |
Collapse
|
14
|
Bafana A, Dutt S, Kumar S, Ahuja PS. Superoxide dismutase: an industrial perspective. Crit Rev Biotechnol 2010; 31:65-76. [DOI: 10.3109/07388551.2010.490937] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
|
15
|
Current awareness on yeast. Yeast 2010. [DOI: 10.1002/yea.1720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
|