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Tsuda M, Nonaka K. Recent progress on heterologous protein production in methylotrophic yeast systems. World J Microbiol Biotechnol 2024; 40:200. [PMID: 38730212 PMCID: PMC11087369 DOI: 10.1007/s11274-024-04008-9] [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: 03/04/2024] [Accepted: 04/27/2024] [Indexed: 05/12/2024]
Abstract
Recombinant protein production technology is widely applied to the manufacture of biologics used as drug substances and industrial proteins such as recombinant enzymes and bioactive proteins. Various heterologous protein production systems have been developed using prokaryotic and eukaryotic hosts. Especially methylotrophic yeast in eukaryotic hosts is suggested to be particularly valuable because such systems have the following advantages: protein secretion into culture broth, eukaryotic quality control systems, a post-translational modification system, rapid growth, and established recombinant DNA tools and technologies such as strong promoters, effective selection markers, and gene knock-in and -out systems. Many methylotrophic yeasts such as the genera Candida, Ogataea, and Komagataella have been studied since methylotrophic yeast was first isolated in 1969. The methanol-consumption-related genes in methylotrophic yeast are strongly and strictly regulated under methanol-containing conditions. The well-regulated gene expression systems under the methanol-inducible gene promoter lead to the potential application of heterologous protein production in methylotrophic yeast. In this review, we describe the recent progress of heterologous protein production technology in methylotrophic yeast and introduce Ogataea minuta as an alternative production host as a substitute for K. phaffii and O. polymorpha.
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Affiliation(s)
- Masashi Tsuda
- Biologics Technology Research Laboratories I, Daiichi Sankyo Co., Ltd., 2716-1 Kurakake, Akaiwa, Chiyoda, Gunma, 370-0503, Japan.
| | - Koichi Nonaka
- Biologics Technology Research Laboratories I, Daiichi Sankyo Co., Ltd., 2716-1 Kurakake, Akaiwa, Chiyoda, Gunma, 370-0503, Japan
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A Pichia pastoris single-cell biosensor for detection of enzymatically produced methanol. Appl Microbiol Biotechnol 2018; 102:7017-7027. [DOI: 10.1007/s00253-018-9144-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2018] [Revised: 05/23/2018] [Accepted: 05/26/2018] [Indexed: 01/02/2023]
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Wang X, Wang Q, Wang J, Bai P, Shi L, Shen W, Zhou M, Zhou X, Zhang Y, Cai M. Mit1 Transcription Factor Mediates Methanol Signaling and Regulates the Alcohol Oxidase 1 (AOX1) Promoter in Pichia pastoris. J Biol Chem 2016; 291:6245-61. [PMID: 26828066 PMCID: PMC4813576 DOI: 10.1074/jbc.m115.692053] [Citation(s) in RCA: 68] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Indexed: 01/03/2023] Open
Abstract
The alcohol oxidase 1 (AOX1) promoter (PAOX1) of Pichia pastoris is the most powerful and commonly used promoter for driving protein expression. However, mechanisms regulating its transcriptional activity are unclear. Here, we identified a Zn(II)2Cys6-type methanol-induced transcription factor 1 (Mit1) and elucidated its roles in regulating PAOX1 activity in response to glycerol and methanol. Mit1 regulated the expression of many genes involved in methanol utilization pathway, including AOX1, but did not participate in peroxisome proliferation and transportation of peroxisomal proteins during methanol metabolism. Structural analysis of Mit1 by performing domain deletions confirmed its specific and critical role in the strict repression of PAOX1 in glycerol medium. Importantly, Mit1, Mxr1, and Prm1, which positively regulated PAOX1 in response to methanol, were bound to PAOX1 at different sites and did not interact with each other. However, these factors cooperatively activated PAOX1 through a cascade. Mxr1 mainly functioned during carbon derepression, whereas Mit1 and Prm1 functioned during methanol induction, with Prm1 transmitting methanol signal to Mit1 by binding to the MIT1 promoter (PMIT1), thus increasingly expressing Mit1 and subsequently activating PAOX1.
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Affiliation(s)
- Xiaolong Wang
- From the State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China and
| | - Qi Wang
- From the State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China and
| | - Jinjia Wang
- From the State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China and
| | - Peng Bai
- From the State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China and
| | - Lei Shi
- From the State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China and
| | - Wei Shen
- From the State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China and
| | - Mian Zhou
- From the State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China and
| | - Xiangshan Zhou
- From the State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China and
| | - Yuanxing Zhang
- From the State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China and the Shanghai Collaborative Innovation Center for Biomanufacturing (SCICB), Shanghai 200237, China
| | - Menghao Cai
- From the State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, Shanghai 200237, China and
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Kawaguchi K, Yurimoto H, Sakai Y. Expression of a codon-optimized Aspergillus niger pectin methylesterase gene in the methylotrophic yeast Candida boidinii. Biosci Biotechnol Biochem 2014; 78:718-21. [DOI: 10.1080/09168451.2014.891936] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Abstract
A codon-optimized Aspergillus niger pectin methylesterase (PME) gene was expressed in the methylotrophic yeast Canidia boidinii. The PME-producing strains showed better growth on pectin than the wild-type strains, suggesting that the PME-producing strains could efficiently utilize methyl ester moieties of pectin. On the other hand, overproduction of PME negatively affected the proliferation of C. boidinii on leaves of Arabidopsis thaliana.
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Affiliation(s)
- Kosuke Kawaguchi
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake, Sakyo-ku, Kyoto, Japan
- Graduate School of Medicine and Pharmaceutical Sciences, Department of Biological Chemistry, University of Toyama, Toyama, Japan
| | - Hiroya Yurimoto
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake, Sakyo-ku, Kyoto, Japan
| | - Yasuyoshi Sakai
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake, Sakyo-ku, Kyoto, Japan
- Advanced Low Carbon Technology Research and Development Program, Japan Science and Technology Agency, Chiyoda-ku, Tokyo, Japan
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Kim YA, Rykov VA, Ashin VV, Molochkov NV, Skarga YY. Thermodynamic behavior and conformational changes of alcohol oxidase from yeast Hansenula polymorpha. Biophysics (Nagoya-shi) 2012. [DOI: 10.1134/s0006350911060091] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Viswanathan S, Li P, Choi W, Filipek S, Balasubramaniam TA, Renugopalakrishnan V. Protein-carbon nanotube sensors: single platform integrated micro clinical lab for monitoring blood analytes. Methods Enzymol 2012; 509:165-94. [PMID: 22568906 DOI: 10.1016/b978-0-12-391858-1.00010-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Design of a unique, single-platform, integrated, multichannel sensor based on carbon nanotube (CNT)-protein adducts specific to each one of the major analytes of blood, glucose, cholesterol, triglyceride, and Hb1AC is presented. The concept underlying the sensor, amperometric detection, is applicable to various disease-monitoring strategies. There is an urgent need to enhance the sensitivity of glucometers to <5% level instead of greater than the present 15% standard in these detectors. CNTs enhance the signals derived from the interaction of the enzymes with the different analytes in blood. Fabricated sensors using the new methodology is a point-of-care device that is targeted for home, clinical, and emergency use and can be redesigned for continuous monitoring for critical care patients.
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Affiliation(s)
- Sowmya Viswanathan
- Newton-Wellesley Hospital/Partners Healthcare System, Newton, Massachusetts, USA
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FERRI S, SODE K. Biomolecular Engineering of Biosensing Molecules —The Challenges in Creating Sensing Molecules for Glycated Protein Biosensing—. ELECTROCHEMISTRY 2012. [DOI: 10.5796/electrochemistry.80.293] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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8
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Osawa F, Fujii T, Nishida T, Tada N, Ohnishi T, Kobayashi O, Komeda T, Yoshida S. Efficient production of L-lactic acid by Crabtree-negative yeast Candida boidinii. Yeast 2009; 26:485-96. [PMID: 19655300 DOI: 10.1002/yea.1702] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Industrial production of L-lactic acid, which in polymerized form as poly-lactic acid is widely used as a biodegradable plastic, has been attracting world-wide attention. By genetic engineering we constructed a strain of the Crabtree-negative yeast Candida boidinii that efficiently produced a large amount of L-lactic acid. The alcohol fermentation pathway of C. boidinii was altered by disruption of the PDC1 gene encoding pyruvate decarboxylase, resulting in an ethanol production that was reduced to 17% of the wild-type strain. The alcohol fermentation pathway of the PDC1 deletion strain was then successfully utilized for the synthesis of L-lactic acid by placing the bovine L-lactate dehydrogenase-encoding gene under the control of the PDC1 promoter by targeted integration. Optimizing the conditions for batch culture in a 5 l jar-fermenter resulted in an L-lactic acid production reaching 85.9 g/l within 48 h. This productivity (1.79 g/l/h) is the highest thus far reported for L-lactic acid-producing yeasts.
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Affiliation(s)
- Fumi Osawa
- Central Laboratories for Frontier Technology, Kirin Holdings Co. Ltd, Kanagawa 236-0004, Japan
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Ferri S, Kim S, Tsugawa W, Sode K. Review of fructosyl amino acid oxidase engineering research: a glimpse into the future of hemoglobin A1c biosensing. J Diabetes Sci Technol 2009; 3:585-92. [PMID: 20144298 PMCID: PMC2769878 DOI: 10.1177/193229680900300324] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Glycated proteins, particularly glycated hemoglobin A1c, are important markers for assessing the effectiveness of diabetes treatment. Convenient and reproducible assay systems based on the enzyme fructosyl amino acid oxidase (FAOD) have become attractive alternatives to conventional detection methods. We review the available FAOD-based assays for measurement of glycated proteins as well as the recent advances and future direction of FAOD research. Future research is expected to lead to the next generation of convenient, simple, and economical sensors for glycated protein, ideally suited for point-of-care treatment and self-monitoring applications.
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Affiliation(s)
- Stefano Ferri
- Department of Biotechnology, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Japan
| | - Seungsu Kim
- Department of Biotechnology, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Japan
| | - Wakako Tsugawa
- Department of Biotechnology, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Japan
- Department of Technology Risk Management, Graduate School of Technology Management, Tokyo University of Agriculture and Technology, Tokyo, Japan
| | - Koji Sode
- Department of Biotechnology, Graduate School of Engineering, Tokyo University of Agriculture and Technology, Koganei, Japan
- Department of Technology Risk Management, Graduate School of Technology Management, Tokyo University of Agriculture and Technology, Tokyo, Japan
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Sasano Y, Yurimoto H, Sakai Y. Gene-tagging mutagenesis in the methylotrophic yeast Candida boidinii. J Biosci Bioeng 2007; 104:86-9. [PMID: 17697989 DOI: 10.1263/jbb.104.86] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2007] [Accepted: 04/13/2007] [Indexed: 11/17/2022]
Abstract
A gene-tagging mutagenesis method by random integration of linear DNA fragments was developed and used in the methylotrophic yeast Candida boidinii to isolate mutants defective in methanol-inducible gene expression. A large number of mutants were obtained, indicating that this method is a powerful tool for random mutagenesis in C. boidinii.
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Affiliation(s)
- Yu Sasano
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake, Kyoto, Japan
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van der Klei IJ, Veenhuis M. Yeast and filamentous fungi as model organisms in microbody research. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2006; 1763:1364-73. [PMID: 17050005 DOI: 10.1016/j.bbamcr.2006.09.014] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2006] [Revised: 09/01/2006] [Accepted: 09/06/2006] [Indexed: 11/19/2022]
Abstract
Yeast and filamentous fungi are important model organisms in microbody research. The value of these organisms as models for higher eukaryotes is underscored by the observation that the principles of various aspects of microbody biology are strongly conserved from lower to higher eukaryotes. This has allowed to resolve various peroxisome-related functions, including peroxisome biogenesis disorders in man. This paper summarizes the major advances in microbody research using fungal systems and specifies specific properties and advantages/disadvantages of the major model organisms currently in use.
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Affiliation(s)
- Ida J van der Klei
- Eukaryotic Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute (GBB), University of Groningen, PO Box 14, 9750 AA Haren, The Netherlands.
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Baek CH, Farrand SK, Park DK, Lee KE, Hwang W, Kim KS. Genes for utilization of deoxyfructosyl glutamine (DFG), an amadori compound, are widely dispersed in the family Rhizobiaceae. FEMS Microbiol Ecol 2005; 53:221-33. [PMID: 16329942 DOI: 10.1016/j.femsec.2004.12.008] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2004] [Revised: 10/18/2004] [Accepted: 12/12/2004] [Indexed: 11/28/2022] Open
Abstract
Amadori compounds form spontaneously in decomposing plant material and can be found in the rhizosphere. As such, these compounds could influence microbial populations by serving as sources of carbon, nitrogen and energy to microorganisms expressing suitable catabolic pathways. Two distinct sets of genes for utilization of deoxyfructosyl glutamine (DFG), an Amadori compound, have been identified in isolates of Agrobacterium spp. One, the soc gene set, is encoded by pAtC58, a 543 kb plasmid in A. tumefaciens strain C58. The second, mocD dissimilates DFG formed in the pathway for catabolism of mannopine (MOP) a non-Amadori, imine-type member of the mannityl opine family characteristic of certain Ti and Ri plasmids. To assess the level of dispersal of these two Amadori-utilizing systems, isolates of Agrobacterium spp. and related bacteria in the family Rhizobiaceae were examined by Southern analysis for homologs of socD and mocD. Homologs of mocD were associated only with Ti plasmid-encoded pathways for catabolism of MOP. Homologs of socD were more widely distributed, being detectable in many but not all of the isolates of Agrobacterium, Sinorhizobium, and Rhizobium spp. tested. However, this gene was never associated with the virulence elements, such as the Ti and Ri plasmids, in these strains. Regardless of genus most of the isolates containing socD homologs could utilize DFG as sole source of carbon, nitrogen and energy. Correlation studies suggested that mocD has evolved uniquely as part of the mannityl opine catabolic pathway while socD has evolved for the general utilization of Amadori compounds. Certain isolates of Agrobacterium and Rhizobium that lacked detectable homologs of socD and mocD also could utilize DFG suggesting the existence of additional, unrelated pathways for the catabolism of this Amadori compound. These results suggest that Amadori compounds constitute a source of nutrition that is important to microflora in the rhizosphere.
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Affiliation(s)
- Chang-Ho Baek
- Department of Life Science, Sogang University, Mapo-Gu, Seoul, Republic of Korea
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Komeda T, Yurimoto H, Kato N, Sakai Y, Kondo K. Cis-acting elements sufficient for induction of FDH1 expression by formate in the methylotrophic yeast Candida boidinii. Mol Genet Genomics 2003; 270:273-80. [PMID: 14534783 DOI: 10.1007/s00438-003-0917-0] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2003] [Accepted: 08/12/2003] [Indexed: 10/26/2022]
Abstract
The FDH1 gene of Candida boidinii encodes an NAD+-dependent formate dehydrogenase, which catalyzes the last reaction in the methanol dissimilation pathway. FDH1 expression is strongly induced by methanol, as are the promoters of the genes AOD1 (alcohol oxidase) and DAS1 (dihydroxyacetone synthase). FDH1 expression can be induced by formate when cells are grown on a medium containing glucose as a carbon source, whereas expression of AOD1 and DAS1 is completely repressed in the presence of glucose. Using deletion analyses, we identified two cis-acting regulatory elements, termed UAS-FM and UAS-M, respectively, in the 5' non-coding region of the FDH1 gene. Both elements were necessary for full induction of the FDH1 promoter by methanol, while only the UAS-FM element was required for full induction by formate. Irrespective of whether induction was achieved with methanol or formate, the UAS-FM element enhanced the level of induction of the FDH1 promoter in a manner dependent on the number of copies, but independent of their orientation, and also converted the ACT1 promoter from a constitutive into an inducible element. Our results not only provide a powerful promoter for heterologous gene expression, but also yield insights into the mechanism of regulation of FDH1 expression at the molecular level.
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Affiliation(s)
- T Komeda
- Central Laboratories for Key Technology, Kirin Brewery Co, Ltd, 1-13-5 Fukuura, Kanazawa-ku, 236-0004 Yokohama-shi, Kanagawa, Japan.
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Yurimoto H, Hasegawa T, Sakai Y, Kato N. Characterization and high-level production of D-amino acid oxidase in Candida boidinii. Biosci Biotechnol Biochem 2001; 65:627-33. [PMID: 11330678 DOI: 10.1271/bbb.65.627] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
D-Amino acid oxidase (DAO, EC 1.4.3.3) from a methylotrophic yeast, Candida boidinii, was produced at a high level under the control of the alcohol oxidase gene promoter in the original host. The enzyme was a peroxisomal and monomeric enzyme, and contained noncovalently-bound FAD as a cofactor. The enzyme was active toward several D-amino acids such as D-Ala, D-Met, and D-Ser. An alcohol oxidase-depleted strain (aod1delta) was found to be a more suitable host for DAO production than the wild-type strain. Several post-translational effects may be responsible for the improvement of the DAO productivity by the aod1delta strain. Finally, an aod1delta strain transformant having multi-copies of an expression plasmid on its chromosome could produce DAO amounting up to 30% of the total soluble proteins.
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Affiliation(s)
- H Yurimoto
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Japan
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Yurimoto H, Komeda T, Lim CR, Nakagawa T, Kondo K, Kato N, Sakai Y. Regulation and evaluation of five methanol-inducible promoters in the methylotrophic yeast Candida boidinii. BIOCHIMICA ET BIOPHYSICA ACTA 2000; 1493:56-63. [PMID: 10978507 DOI: 10.1016/s0167-4781(00)00157-3] [Citation(s) in RCA: 41] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We isolated the promoter regions of five methanol-inducible genes (P(AOD1), alcohol oxidase; P(DAS1), dihydroxyacetone synthase; P(FDH1), formate dehydrogenase; P(PMP20), Pmp20; and P(PMP47), Pmp47) from the Candida boidinii genome, and evaluated their strength and studied their regulation using the acid phosphatase gene of Saccharomyces cerevisiae (ScPHO5) as the reporter. Of the five promoters, P(DAS1) was the strongest methanol-inducible promoter whose strength was approximately 1.5 times higher than that of the commonly used P(AOD1) in methanol-induced cells. Although the expression of P(AOD1) and P(DAS1) was completely repressed by the presence of glucose, formate-induced expression of P(FDH1) was not repressed by glucose. Expression under P(PMP47), another methanol-inducible promoter, was highly induced by oleate. The induction kinetics of P(PMP47) and P(DAS1) revealed that methanol induces the expression of peroxisome membrane protein Pmp47, earlier than the expression of matrix enzyme dihydroxyacetone synthase (Das1p), and that this information is contained in the promoter region of the respective gene. This is the first report which evaluates several methanol-inducible promoters in parallel in the methylotrophic yeast.
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Affiliation(s)
- H Yurimoto
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kitashirakawa-Oiwake, Sakyo-ku, Kyoto 606-8502, Japan
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Nishikawa M, Hagishita T, Yurimoto H, Kato N, Sakai Y, Hatanaka T. Primary structure and expression of peroxisomal acetylspermidine oxidase in the methylotrophic yeast Candida boidinii. FEBS Lett 2000; 476:150-4. [PMID: 10913603 DOI: 10.1016/s0014-5793(00)01708-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Acetylspermidine oxidase (ASOD) belongs to a family of FAD-containing amine oxidases and catalyzes the oxidation of N-acetylated spermidine in polyamine metabolism. ASOD was purified to apparent homogeneity from cells of the methylotrophic yeast Candida boidinii grown on spermidine as the sole nitrogen source. C. boidinii ASOD catalyzed the oxidation of only N(1)-acetylspermidine. Based on partial amino acid sequences, oligonucleotide primers were designed for polymerase chain reaction, and the ASOD-encoding gene, ASO1, was cloned. The open reading frame encoding ASO1 was 1530 bp long and corresponded to a protein of 509 amino acid residues (calculated molecular mass=57167 Da). ASO1 contained a FAD-binding motif of G-A-G-I-A-G in the N-terminal region and carried an amino acid sequence of -S-K-L at the C-terminal, representing a typical peroxisome targeting signal 1. ASOD was localized in the peroxisomes in overexpressed C. boidinii. To our knowledge, this is the first report on the gene coding for ASOD that can catalyze the oxidation of N-acetylated polyamine as a substrate, from any type of organism.
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Affiliation(s)
- M Nishikawa
- Research Institute for Biological Sciences Okayama, Okayama, Japan.
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