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Mombeni M, Arjmand S, Siadat SOR, Alizadeh H, Abbasi A. pMOX: a new powerful promoter for recombinant protein production in yeast Pichia pastoris. Enzyme Microb Technol 2020; 139:109582. [DOI: 10.1016/j.enzmictec.2020.109582] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2019] [Revised: 04/17/2020] [Accepted: 04/18/2020] [Indexed: 11/27/2022]
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Hou C, Yang Y, Xing Y, Zhan C, Liu G, Liu X, Liu C, Zhan J, Xu D, Bai Z. Targeted editing of transcriptional activator MXR1 on the Pichia pastoris genome using CRISPR/Cas9 technology. Yeast 2020; 37:305-312. [PMID: 32050051 DOI: 10.1002/yea.3462] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 02/07/2020] [Accepted: 02/08/2020] [Indexed: 01/09/2023] Open
Abstract
A highly efficient and targeted clustered regularly interspaced short palindromic repeats (CRISPR)/Cas9 gene editing system was constructed for Pichia pastoris (syn Komagataella phaffii). Plasmids containing single guide RNA and the methanol expression regulator 1 (MXR1) homology arms were used to precisely edit the transcriptional activator Mxr1 on the P. pastoris genome. At the S215 amino acid position of Mxr1, one, two, and three nucleotides were precisely deleted or inserted, and S215 was also mutated to S215A via a single-base substitution. Sequencing of polymerase chain reaction (PCR) amplicons in the region spanning MXR1 showed that CRISPR/Cas9 technology enabled efficient and precise gene editing of P. pastoris. The expression levels of several of the Mxr1-targeted genes, AOX1, AOX2, DAS1, and DAS2, in strains containing the various mutated variants of MXR1, were then detected through reverse transcription PCR following induction in methanol-containing culture medium. The frameshift mutations of Mxr1 led to almost zero transcription of AOX1, DAS1, and DAS2, while that of AOX2 was reduced to 60%. For the Mxr1 S215A mutant, the transcription of AOX1, AOX2, DAS1, and DAS2 was also reduced by nearly 60%. Based on these results, it is apparent that the transcription of AOX1, DAS1, and DAS2 is exclusively regulated by Mxr1 and serine phosphorylation at Mxr1 residue 215 is not critical for this function. In contrast, the transcription of AOX2 is mainly dependent on the phosphorylation of this residue. CRISPR/Cas9 technology was, therefore, successfully applied to the targeted editing of MXR1 on the P. pastoris genome, and it provided an effective method for the study of this transcription factor and its targets.
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Affiliation(s)
- Chenglin Hou
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
| | - Yankun Yang
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
| | - Yan Xing
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
| | - Chunjun Zhan
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
| | - Guoqiang Liu
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
| | - Xiuxia Liu
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
| | - Chunli Liu
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
| | - Jinling Zhan
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
| | - Dinghua Xu
- Research and Development Department, Wuxi Sinosbio Biomedical Technologies, Wuxi, China
| | - Zhonghu Bai
- The Key Laboratory of Carbohydrate Chemistry and Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- The Key Laboratory of Industrial Biotechnology, Ministry of Education, School of Biotechnology, Jiangnan University, Wuxi, China
- National Engineering Laboratory for Cereal Fermentation Technology, Jiangnan University, Wuxi, China
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Vogl T, Fischer JE, Hyden P, Wasmayer R, Sturmberger L, Glieder A. Orthologous promoters from related methylotrophic yeasts surpass expression of endogenous promoters of Pichia pastoris. AMB Express 2020; 10:38. [PMID: 32100120 PMCID: PMC7042429 DOI: 10.1186/s13568-020-00972-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Accepted: 02/11/2020] [Indexed: 11/18/2022] Open
Abstract
Methylotrophic yeasts such as Komagataella phaffii (syn. Pichia pastoris, Pp), Hansenula polymorpha (Hp), Candida boidinii (Cb) and Pichia methanolica (Pm) are widely used protein production platforms. Typically, strong, tightly regulated promoters of genes coding for their methanol utilization (MUT) pathways are used to drive heterologous gene expression. Despite highly similar open reading frames in the MUT pathways of the four yeasts, the regulation of the respective promoters varies strongly between species. While most endogenous Pp MUT promoters remain tightly repressed after depletion of a repressing carbon, Hp, Cb and Pm MUT promoters are derepressed to up to 70% of methanol induced levels, enabling methanol free production processes in their respective host background. Here, we have tested a series of orthologous promoters from Hp, Cb and Pm in Pp. Unexpectedly, when induced with methanol, the promoter of the HpMOX gene reached very similar expression levels as the strong methanol, inducible, and most frequently used promoter of the Pp alcohol oxidase 1 gene (PPpAOX1). The HpFMD promoter even surpassed PPpAOX1 up to three-fold, when induced with methanol, and reached under methanol-free/derepressed conditions similar expression as the methanol induced PPpAOX1. These results demonstrate that orthologous promoters from related yeast species can give access to otherwise unobtainable regulatory profiles and may even considerably surpass endogenous promoters in P. pastoris.
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Chang CH, Hsiung HA, Hong KL, Huang CT. Enhancing the efficiency of the Pichia pastoris AOX1 promoter via the synthetic positive feedback circuit of transcription factor Mxr1. BMC Biotechnol 2018; 18:81. [PMID: 30587177 PMCID: PMC6307218 DOI: 10.1186/s12896-018-0492-4] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Accepted: 12/17/2018] [Indexed: 11/10/2022] Open
Abstract
Background The methanol-regulated AOX1 promoter (PAOX1) is the most widely used promoter in the production of recombinant proteins in the methylotrophic yeast Pichia pastoris. However, as the tight regulation and methanol dependence of PAOX1 restricts its application, it is necessary to develop a flexible induction system to avoid the problems of methanol without losing the advantages of PAOX1. The availability of synthetic biology tools enables researchers to reprogram the cellular behaviour of P. pastoris to achieve this goal. Results The characteristics of PAOX1 are highly related to the expression profile of methanol expression regulator 1 (Mxr1). In this study, we applied a biologically inspired strategy to reprogram regulatory networks in P. pastoris. A reprogrammed P. pastoris was constructed by inserting a synthetic positive feedback circuit of Mxr1 driven by a weak AOX2 promoter (PAOX2). This novel approach enhanced PAOX1 efficiency by providing extra Mxr1 and generated switchable Mxr1 expression to allow PAOX1 to be induced under glycerol starvation or carbon-free conditions. Additionally, the inhibitory effect of glycerol on PAOX1 was retained because the synthetic circuit was not activated in response to glycerol. Using green fluorescent protein as a demonstration, this reprogrammed P. pastoris strain displayed stronger fluorescence intensity than non-reprogrammed cells under both methanol induction and glycerol starvation. Moreover, with single-chain variable fragment (scFv) as the model protein, increases in extracellular scFv productivity of 98 and 269% were observed in Mxr1-reprogrammed cells under methanol induction and glycerol starvation, respectively, compared to productivity in non-reprogrammed cells under methanol induction. Conclusions We successfully demonstrate that the synthetic positive feedback circuit of Mxr1 enhances recombinant protein production efficiency in P. pastoris and create a methanol-free induction system to eliminate the potential risks of methanol. Electronic supplementary material The online version of this article (10.1186/s12896-018-0492-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Ching-Hsiang Chang
- Department of Biochemical Science and Technology, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617, Taiwan
| | - Hao-An Hsiung
- Department of Biochemical Science and Technology, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617, Taiwan
| | - Kai-Lin Hong
- Department of Biochemical Science and Technology, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617, Taiwan
| | - Ching-Tsan Huang
- Department of Biochemical Science and Technology, National Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei, 10617, Taiwan.
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Ma Y, Kim SS, Kwag DG, Kim SH, Kim MS, Ryu SH, Lee DH, So JH, Nam BH, Kim YO, An CM, Park JS. High-Level Expression and Purification of Tag-free Peptides Containing Multiple Disulfide Bond in Pichia pastoris. B KOREAN CHEM SOC 2018. [DOI: 10.1002/bkcs.11369] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Yunqi Ma
- Department of Chemistry and Chemistry Institute of Functional Materials; Pusan National University; Busan 609-735 Republic of Korea
| | - So-Sun Kim
- Department of Chemistry and Chemistry Institute of Functional Materials; Pusan National University; Busan 609-735 Republic of Korea
| | - Dong-Geon Kwag
- Department of Chemistry and Chemistry Institute of Functional Materials; Pusan National University; Busan 609-735 Republic of Korea
| | - Seo-Hyun Kim
- Department of Chemistry and Chemistry Institute of Functional Materials; Pusan National University; Busan 609-735 Republic of Korea
| | - Min-Seob Kim
- Department of Chemistry and Chemistry Institute of Functional Materials; Pusan National University; Busan 609-735 Republic of Korea
| | - Seung-Ho Ryu
- Department of Chemistry and Chemistry Institute of Functional Materials; Pusan National University; Busan 609-735 Republic of Korea
| | - Dong-Hoon Lee
- Department of Chemistry and Chemistry Institute of Functional Materials; Pusan National University; Busan 609-735 Republic of Korea
| | - Jae-Hyeong So
- Department of Chemistry and Chemistry Institute of Functional Materials; Pusan National University; Busan 609-735 Republic of Korea
| | - Bo-Hye Nam
- Biotechnology Research Division, Aquaculture Industry Department; National Fisheries Research and Development Institute; Busan 619-902 Republic of Korea
| | - Yong-Ok Kim
- Biotechnology Research Division, Aquaculture Industry Department; National Fisheries Research and Development Institute; Busan 619-902 Republic of Korea
| | - Cheul-Min An
- Biotechnology Research Division, Aquaculture Industry Department; National Fisheries Research and Development Institute; Busan 619-902 Republic of Korea
| | - Jang-Su Park
- Department of Chemistry and Chemistry Institute of Functional Materials; Pusan National University; Busan 609-735 Republic of Korea
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Mohandesi N, Siadat SOR, Haghbeen K, Hesampour A. Cloning and expression of Saccharomyces cerevisiae SUC2 gene in yeast platform and characterization of recombinant enzyme biochemical properties. 3 Biotech 2016; 6:129. [PMID: 28330196 PMCID: PMC4909026 DOI: 10.1007/s13205-016-0441-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 05/25/2016] [Indexed: 12/03/2022] Open
Abstract
Invertase (EC.3.2.1.26) catalyzes the hydrolysis of sucrose to an equimolar mixture of D-glucose and D-fructose which is of interest for various industrial applications. In this research, Saccharomyces cerevisiae invertase gene (SUC2) was optimized based on Pichia pastoris codon preference. The synthetic gene was introduced into the methylotrophic yeast Pichia pastoris under the control of the inducible AOX1 promoter. High level of the extracellular recombinant invertase (R-inv) production was achieved via methanol induction for 4 days and purified by His-Tag affinity chromatography which appeared to be a mixture of glycosylated proteins with various sizes of 85-95 kDa on SDS-PAGE. Deglycosylation of the proteins by Endo-H resulted in the proteins with average molecular weight of 60 kDa. The purified recombinant invertase biochemical properties and kinetic parameters determined a pH and temperature optimum at 4.8 and 60 °C, respectively, which in comparison with native S. cerevisiae invertase, thermal stability of recombinant invertase is highly increased in different heating treatment experiments. The purification of recombinant invertase resulted in an enzyme with specific activity of 178.56 U/mg with 3.83-fold of purification and the kinetic constants for enzyme were Km value of 19 mM and Vmax value of 300 μmol min-1 mg-1 With kinetic efficiency (Kcat/Km) of 13.15 s-1 mmol-1 it can be concluded that recombinant P. pastoris invertase can be more effective for industrial quality criteria. We conclude that recombinant P. pastoris enzyme with broad pH stability, substrate specificity and proper thermal stability can fulfil a series of predefined industrial quality criteria to be used in food, pharmaceutical and bio ethanol production industries.
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Affiliation(s)
- Nooshin Mohandesi
- National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Islamic Republic of Iran
| | | | - Kamahldin Haghbeen
- National Institute of Genetic Engineering and Biotechnology (NIGEB), Tehran, Islamic Republic of Iran
| | - Ardeshir Hesampour
- Department of Biology, Central Tehran Branch, Islamic Azad University, Tehran, Islamic Republic of Iran
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Oh DB, Park JS, Kim MW, Cheon SA, Kim EJ, Moon HY, Kwon O, Rhee SK, Kang HA. Glycoengineering of the methylotrophic yeastHansenula polymorpha for the production of glycoproteins with trimannosyl coreN-glycan by blocking core oligosaccharide assembly. Biotechnol J 2008; 3:659-68. [DOI: 10.1002/biot.200700252] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Kim MW, Kim EJ, Kim JY, Park JS, Oh DB, Shimma YI, Chiba Y, Jigami Y, Rhee SK, Kang HA. Functional characterization of the Hansenula polymorpha HOC1, OCH1, and OCR1 genes as members of the yeast OCH1 mannosyltransferase family involved in protein glycosylation. J Biol Chem 2006; 281:6261-72. [PMID: 16407250 DOI: 10.1074/jbc.m508507200] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The alpha-1,6-mannosyltransferase encoded by Saccharomyces cerevisiae OCH1 (ScOCH1) is responsible for the outer chain initiation of N-linked oligosaccharides. To identify the genes involved in the first step of outer chain biosynthesis in the methylotrophic yeast Hansenula polymorpha, we undertook the functional analysis of three H. polymorpha genes, HpHOC1, HpOCH1, and HpOCR1, that belong to the OCH1 family containing seven members with significant sequence identities to ScOCH1. The deletions of these H. polymorpha genes individually resulted in several phenotypes suggestive of cell wall defects. Whereas the deletion of HpHOC1 (Hphoc1Delta) did not generate any detectable changes in N-glycosylation, the null mutant strains of HpOCH1 (Hpoch1Delta) and HpOCR1 (Hpocr1Delta) displayed a remarkable reduction in hypermannosylation. Although the apparent phenotypes of Hpocr1Delta were most similar to those of S. cerevisiae och1 mutants, the detailed structural analysis of N-glycans revealed that the major defect of Hpocr1Delta is not in the initiation step but rather in the subsequent step of outer chain elongation by alpha-1,2-mannose addition. Most interestingly, Hpocr1Delta showed a severe defect in the O-linked glycosylation of extracellular chitinase, representing HpOCR1 as a novel member of the OCH1 family implicated in both N- and O-linked glycosylation. In contrast, addition of the first alpha-1,6-mannose residue onto the core oligosaccharide Man8GlcNAc2 was completely blocked in Hpoch1Delta despite the comparable growth of its wild type under normal growth conditions. The complementation of the S. cerevisiae och1 null mutation by the expression of HpOCH1 and the lack of in vitro alpha-1,6-mannosyltransferase activity in Hpoch1Delta provided supportive evidence that HpOCH1 is the functional orthologue of ScOCH1. The engineered Hpoch1Delta strain with the targeted expression of Aspergillus saitoi alpha-1,2-mannosidase in the endoplasmic reticulum was shown to produce human-compatible high mannose-type Man5GlcNAc2 oligosaccharide as a major N-glycan.
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Affiliation(s)
- Moo Woong Kim
- Metabolic Engineering Laboratory, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-600, Korea
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Ozimek P, Veenhuis M, van der Klei IJ. Alcohol oxidase: a complex peroxisomal, oligomeric flavoprotein. FEMS Yeast Res 2005; 5:975-83. [PMID: 16169288 DOI: 10.1016/j.femsyr.2005.06.005] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2005] [Revised: 06/07/2005] [Accepted: 06/07/2005] [Indexed: 10/25/2022] Open
Abstract
Alcohol oxidase (AO) is the key enzyme of methanol metabolism in methylotrophic yeast species. It catalyses the first step of methanol catabolism, namely its oxidation to formaldehyde with concomitant production of hydrogen peroxide. In its mature active form, AO is a molecule of high molecular mass (600 kDa) that consists of eight identical subunits, each of which carry one non-covalently bound flavin adenine nucleotide (FAD) molecule as the prosthetic group. In vivo, the protein is compartmentalized into special cell organelles, termed peroxisomes. AO is an abundant protein and its synthesis is strictly regulated by repression/derepression and induction mechanisms that occur at the transcriptional level. Various aspects of its sorting and assembly/activation render AO a unique protein. Recent developments of AO synthesis, sorting and assembly/activation are highlighted in this paper.
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Affiliation(s)
- Paulina Ozimek
- Eukaryotic Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute (GBB), University of Groningen, P.O. Box 14, 9750 AA Haren, The Netherlands
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Gellissen G, Kunze G, Gaillardin C, Cregg JM, Berardi E, Veenhuis M, van der Klei I. New yeast expression platforms based on methylotrophic Hansenula polymorpha and Pichia pastoris and on dimorphic Arxula adeninivorans and Yarrowia lipolytica - a comparison. FEMS Yeast Res 2005; 5:1079-96. [PMID: 16144775 DOI: 10.1016/j.femsyr.2005.06.004] [Citation(s) in RCA: 130] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2005] [Revised: 06/09/2005] [Accepted: 06/09/2005] [Indexed: 11/29/2022] Open
Abstract
Yeasts combine the ease of genetic manipulation and fermentation of a microbial organism with the capability to secrete and to modify proteins according to a general eukaryotic scheme. Yeasts thus provide attractive platforms for the production of recombinant proteins. Here, four important species are presented and compared: the methylotrophic Hansenula polymorpha and Pichia pastoris, distinguished by an increasingly large track record as industrial platforms, and the dimorphic species Arxula adeninivorans and Yarrrowia lipolytica, not yet established as industrial platforms, but demonstrating promising technological potential, as discussed in this article.
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Affiliation(s)
- Gerd Gellissen
- PharmedArtis GmbH, Forckenbeckstr. 6, 52074 Aachen, Germany
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Abstract
The development of heterologous overexpression systems for soluble proteins has greatly advanced the study of the structure/function relationships of these proteins and their biotechnological and pharmaceutical applications. In this paper we present an overview on several aspects of the use of the methylotrophic yeast Hansenula polymorpha as a host for heterologous gene expression. H. polymorpha has been successfully exploited as a cell factory for the large-scale production of such components. Stable, engineered strains can be obtained by site-directed integration of expression cassettes into the genome, for which various constitutive and inducible promoters are available to control the expression of the foreign genes. New developments have now opened the way to additional applications of H. polymorpha, which are unprecedented for other organisms. Most importantly, it may be the organism of choice for reliable, large-scale production of heterologous membrane proteins, using inducible intracellular membranes and targeting sequences to specifically insert these proteins stably into these membranes. Furthermore, the use of H. polymorpha offers the possibility to accumulate the produced components into specific compartments, namely peroxisomes. These organelles are massively induced during growth of the organism on methanol and may occupy up to 80% of the cell volume. Accumulation inside peroxisomes prevents undesired modifications (e.g. proteolytic processing or glycosylation) and is also in particular advantageous when proteins are produced which are toxic or harmful for the host.
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Kang HA, Sohn JH, Choi ES, Chung BH, Yu MH, Rhee SK. Glycosylation of human alpha 1-antitrypsin in Saccharomyces cerevisiae and methylotrophic yeasts. Yeast 1998; 14:371-81. [PMID: 9559545 DOI: 10.1002/(sici)1097-0061(19980315)14:4<371::aid-yea231>3.0.co;2-1] [Citation(s) in RCA: 45] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Abstract
Human alpha 1-antitrypsin (alpha 1-AT) is a major serine protease inhibitor in plasma, secreted as a glycoprotein with a complex type of carbohydrate at three asparagine residues. To study glycosylation of heterologous proteins in yeast, we investigated the glycosylation pattern of the human alpha 1-AT secreted in the baker's yeast Saccharomyces cerevisiae and in the methylotrophic yeasts, Hansenula polymorpha and Pichia pastoris. The partial digestion of the recombinant alpha 1-AT with endoglycosidase H and the expression in the mnn9 deletion mutant of S. cerevisiae showed that the recombinant alpha 1-AT secreted in S. cerevisiae was heterogeneous, consisting of molecules containing core carbohydrates on either two or all three asparagine residues. Besides the core carbohydrates, variable numbers of mannose outer chains were also added to some of the secreted alpha 1-AT. The human alpha 1-AT secreted in both methylotrophic yeasts was also heterogeneous and hypermannosylated as observed in S. cerevisiae, although the overall length of mannose outer chains of alpha 1-AT in the methylotrophic yeasts appeared to be relatively shorter than those of alpha 1-AT in S. cerevisiae. The alpha 1-AT secreted from both methylotrophic yeasts retained its biological activity as an elastase inhibitor comparable to that of alpha 1-AT from S. cerevisiae, suggesting that the different glycosylation profile does not affect the in vitro activity of the protein.
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Affiliation(s)
- H A Kang
- Korea Research Institute of Bioscience and Biotechnology (KRIBB), Taejon, Korea
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Abstract
The methylotrophic yeasts Hansenula polymorpha, Pichia pastoris and Candida boidinii have been developed as production systems for recombinant proteins. The favourable and most advantageous characteristics of these species have resulted in an increasing number off biotechnological applications. As a consequence, these species--especially H. polymorpha and P. pastoris--are rapidly becoming the systems of choice for heterologous gene expression in yeast. Recent advances in the development of these yeasts as hosts for the production of heterologous proteins have provided a catalogue of new applications, methods and system components.
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Affiliation(s)
- C P Hollenberg
- Institut für Mikrobiologie, Heinrich-Heine-Universität, Düsseldorf, Germany
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