1
|
Zazulya AZ, Semkiv MV, Stec M, Cyske Z, Gaffke L, Pierzynowska K, Węgrzyn G, Sibirny AA. The Komagatella phaffii ACG1 gene, encoding β-1,6-N-acetylglucosaminyltransferase, is involved in the autophagy of cytosolic and peroxisomal proteins. Yeast 2023; 40:367-376. [PMID: 36814084 DOI: 10.1002/yea.3846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Revised: 01/31/2023] [Accepted: 02/17/2023] [Indexed: 02/24/2023] Open
Abstract
The methylotrophic yeast Komagataella phaffii is considered one of the most effective producers of recombinant proteins of industrial importance. Effective producers should be characterized by the maximal reduction of degradation of the cytosolic recombinant proteins. The mechanisms of degradation of cytosolic proteins in K. phaffii have not been elucidated; however, data suggest that they are partially degraded in the autophagic pathway. To identify factors that influence this process, a developed system for the selection of recombinant strains of K. phaffii with impaired autophagic degradation of the heterologous model cytosolic protein (yeast β-galactosidase) was used for insertional tagging of the genes involved in cytosolic proteins degradation. In one of the obtained strains, the insertion cassette disrupted the open reading frame of the gene encoding β-1,6-N-acetylglucosaminyltransferase. A recombinant strain with deletion of this gene was also obtained. The rate of degradation of the β-galactosidase enzyme was two times slower in the insertion mutant and 1.5 times slower in the deletion strain as compared to the parental strain with native β-1,6-N-acetylglucosaminyltransferase. The rate of degradation of native K. phaffii cytosolic and peroxisomal enzymes, formaldehyde dehydrogenase, formate dehydrogenase, and alcohol oxidase, respectively, showed similar trends to that of β-galactosidase-slower degradation in the deletion and insertional mutants as compared to the wild-type strain, but faster protein degradation relative to the strain completely defective in autophagy. We conclude that K. phaffii gene designated ACG1, encoding β-1,6-N-acetylglucosaminyltransferase, is involved in autophagy of the cytosolic and peroxisomal proteins.
Collapse
Affiliation(s)
- Anastasiya Z Zazulya
- Department of Molecular Genetics and Biotechnology, Institute of Cell Biology, National Academy of Science of Ukraine, Lviv, Ukraine
- Department of Molecular Biology, University of Gdansk, Gdansk, Poland
| | - Marta V Semkiv
- Department of Molecular Genetics and Biotechnology, Institute of Cell Biology, National Academy of Science of Ukraine, Lviv, Ukraine
- Department of Molecular Biology, University of Gdansk, Gdansk, Poland
| | - Maxim Stec
- Department of Molecular Genetics and Biotechnology, Institute of Cell Biology, National Academy of Science of Ukraine, Lviv, Ukraine
| | - Zuzanna Cyske
- Department of Molecular Biology, University of Gdansk, Gdansk, Poland
| | - Lidia Gaffke
- Department of Molecular Genetics and Biotechnology, Institute of Cell Biology, National Academy of Science of Ukraine, Lviv, Ukraine
- Department of Molecular Biology, University of Gdansk, Gdansk, Poland
| | - Karolina Pierzynowska
- Department of Molecular Genetics and Biotechnology, Institute of Cell Biology, National Academy of Science of Ukraine, Lviv, Ukraine
- Department of Molecular Biology, University of Gdansk, Gdansk, Poland
| | - Grzegorz Węgrzyn
- Department of Molecular Biology, University of Gdansk, Gdansk, Poland
| | - Andriy A Sibirny
- Department of Molecular Genetics and Biotechnology, Institute of Cell Biology, National Academy of Science of Ukraine, Lviv, Ukraine
- Department of Biotechnology and Microbiology, University of Rzeszow, Rzeszow, Poland
| |
Collapse
|
2
|
Sibirny AA. Metabolic engineering of non-conventional yeasts for construction of the advanced producers of biofuels and high-value chemicals. BBA ADVANCES 2022; 3:100071. [PMID: 37082251 PMCID: PMC10074886 DOI: 10.1016/j.bbadva.2022.100071] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Non-conventional yeasts, i.e. yeasts different from Saccharomyces cerevisiae, represent heterogenous group of unicellular fungi consisting of near 1500 species. Some of these species have interesting and sometimes unique properties like ability to grow on methanol, n-alkanes, ferment pentose sugars xylose and l-arabinose, grow at high temperatures (50°С and more), overproduce riboflavin (vitamin B2) and others. These unique properties are important for development of basic science; moreover, some of them possess also significant applied interest for elaboration of new biotechnologies. Current paper represents review of the recent own results and of those of other authors in the field of non-conventional yeast study for construction of the advanced producers of biofuels (ethanol, isobutanol) from lignocellulosic sugars glucose and xylose or crude glycerol (Ogataea polymorpha, Magnusiomyces magnusii) and vitamin B2 (riboflavin) from glucose and cheese whey (Candida famata).
Collapse
Affiliation(s)
- Andriy A. Sibirny
- Institute of Cell Biology, NAS of Ukraine, Drahomanov Street 14/16, Lviv 79005 Ukraine
- University of Rzeszow, Zelwerowicza 4, Rzeszow 35-601 Poland
- Corresponding author at: Institute of Cell Biology, NAS of Ukraine, Drahomanov Street 14/16, Lviv 79005 Ukraine.
| |
Collapse
|
3
|
Ruchala J, Andreieva YA, Tsyrulnyk AO, Sobchuk SM, Najdecka A, Wen L, Kang Y, Dmytruk OV, Dmytruk KV, Fedorovych DV, Sibirny AA. Cheese whey supports high riboflavin synthesis by the engineered strains of the flavinogenic yeast Candida famata. Microb Cell Fact 2022; 21:161. [PMID: 35964025 PMCID: PMC9375410 DOI: 10.1186/s12934-022-01888-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Accepted: 08/05/2022] [Indexed: 11/29/2022] Open
Abstract
Background Riboflavin is a precursor of FMN and FAD which act as coenzymes of numerous enzymes. Riboflavin is an important biotechnological commodity with annual market sales exceeding nine billion US dollars. It is used primarily as a component of feed premixes, a food colorant, a component of multivitamin mixtures and medicines. Currently, industrial riboflavin production uses the bacterium, Bacillus subtilis, and the filamentous fungus, Ashbya gossypii, and utilizes glucose and/or oils as carbon substrates. Results We studied riboflavin biosynthesis in the flavinogenic yeast Candida famata that is a genetically stable riboflavin overproducer. Here it was found that the wild type C. famata is characterized by robust growth on lactose and cheese whey and the engineered strains also overproduce riboflavin on whey. The riboflavin synthesis on whey was close to that obtained on glucose. To further enhance riboflavin production on whey, the gene of the transcription activator SEF1 was expressed under control of the lactose-induced promoter of the native β-galactosidase gene LAC4. These transformants produced elevated amounts of riboflavin on lactose and especially on whey. The strain with additional overexpression of gene RIB6 involved in conversion of ribulose-5-phosphate to riboflavin precursor had the highest titer of accumulated riboflavin in flasks during cultivation on whey. Activation of riboflavin synthesis was also obtained after overexpression of the GND1 gene that is involved in the synthesis of the riboflavin precursor ribulose-5-phosphate. The best engineered strains accumulated 2.5 g of riboflavin/L on whey supplemented only with (NH4)2SO4 during batch cultivation in bioreactor with high yield (more than 300 mg/g dry cell weight). The use of concentrated whey inhibited growth of wild-type and engineered strains of C. famata, so the mutants tolerant to concentrated whey were isolated. Conclusions Our data show that the waste of dairy industry is a promising substrate for riboflavin production by C. famata. Possibilities for using the engineered strains of C. famata to produce high-value commodity (riboflavin) from whey are discussed. Supplementary Information The online version contains supplementary material available at 10.1186/s12934-022-01888-0.
Collapse
Affiliation(s)
- Justyna Ruchala
- Institute of Cell Biology, NAS of Ukraine, Drahomanov St, 14/16, Lviv, 79005, Ukraine.,University of Rzeszow, Zelwerowicza 4, 35-601, Rzeszow, Poland
| | - Yuliia A Andreieva
- Institute of Cell Biology, NAS of Ukraine, Drahomanov St, 14/16, Lviv, 79005, Ukraine.,University of Rzeszow, Zelwerowicza 4, 35-601, Rzeszow, Poland
| | - Andriy O Tsyrulnyk
- Institute of Cell Biology, NAS of Ukraine, Drahomanov St, 14/16, Lviv, 79005, Ukraine
| | - Svitlana M Sobchuk
- Institute of Cell Biology, NAS of Ukraine, Drahomanov St, 14/16, Lviv, 79005, Ukraine
| | - Alicja Najdecka
- University of Rzeszow, Zelwerowicza 4, 35-601, Rzeszow, Poland
| | - Liu Wen
- Institute of Cell Biology, NAS of Ukraine, Drahomanov St, 14/16, Lviv, 79005, Ukraine.,Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Yingqian Kang
- Guizhou Medical University, Guiyang, 550025, Guizhou, China
| | - Olena V Dmytruk
- Institute of Cell Biology, NAS of Ukraine, Drahomanov St, 14/16, Lviv, 79005, Ukraine.,University of Rzeszow, Zelwerowicza 4, 35-601, Rzeszow, Poland
| | - Kostyantyn V Dmytruk
- Institute of Cell Biology, NAS of Ukraine, Drahomanov St, 14/16, Lviv, 79005, Ukraine
| | - Dariya V Fedorovych
- Institute of Cell Biology, NAS of Ukraine, Drahomanov St, 14/16, Lviv, 79005, Ukraine.,University of Rzeszow, Zelwerowicza 4, 35-601, Rzeszow, Poland
| | - Andriy A Sibirny
- Institute of Cell Biology, NAS of Ukraine, Drahomanov St, 14/16, Lviv, 79005, Ukraine. .,University of Rzeszow, Zelwerowicza 4, 35-601, Rzeszow, Poland.
| |
Collapse
|
4
|
Kurylenko OO, Ruchala J, Dmytruk KV, Abbas CA, Sibirny AA. Multinuclear Yeast
Magnusiomyces (Dipodascus, Endomyces) magnusii
is a Promising Isobutanol Producer. Biotechnol J 2020; 15:e1900490. [DOI: 10.1002/biot.201900490] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 12/28/2019] [Indexed: 12/21/2022]
Affiliation(s)
- Olena O. Kurylenko
- Department of Molecular Genetics and BiotechnologyInstitute of Cell BiologyNAS of Ukraine Lviv 79005 Ukraine
| | - Justyna Ruchala
- Department of Molecular Genetics and BiotechnologyInstitute of Cell BiologyNAS of Ukraine Lviv 79005 Ukraine
- Department of Microbiology and BiotechnologyUniversity of Rzeszow Rzeszow 35‐601 Poland
| | - Kostyantyn V. Dmytruk
- Department of Molecular Genetics and BiotechnologyInstitute of Cell BiologyNAS of Ukraine Lviv 79005 Ukraine
| | | | - Andriy A. Sibirny
- Department of Molecular Genetics and BiotechnologyInstitute of Cell BiologyNAS of Ukraine Lviv 79005 Ukraine
- Department of Microbiology and BiotechnologyUniversity of Rzeszow Rzeszow 35‐601 Poland
| |
Collapse
|
5
|
Defosse TA, Melin C, Obando Montoya EJ, Lanoue A, Foureau E, Glévarec G, Oudin A, Simkin AJ, Crèche J, Atehortùa L, Giglioli-Guivarc’h N, Clastre M, Courdavault V, Papon N. A new series of vectors for constitutive, inducible or repressible gene expression in Candida guilliermondii. J Biotechnol 2014; 180:37-42. [DOI: 10.1016/j.jbiotec.2014.03.034] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 03/21/2014] [Accepted: 03/26/2014] [Indexed: 12/11/2022]
|
6
|
Metabolic and bioprocess engineering of the yeast Candida famata for FAD production. J Ind Microbiol Biotechnol 2014; 41:823-35. [PMID: 24595668 DOI: 10.1007/s10295-014-1422-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Accepted: 02/13/2014] [Indexed: 10/25/2022]
Abstract
Flavins in the form of flavin mononucleotide (FMN) and flavin adenine dinucleotide (FAD) play an important role in metabolism as cofactors for oxidoreductases and other enzymes. Flavin nucleotides have applications in the food industry and medicine; FAD supplements have been efficiently used for treatment of some inheritable diseases. FAD is produced biotechnologically; however, this compound is much more expensive than riboflavin. Flavinogenic yeast Candida famata synthesizes FAD from FMN and ATP in the reaction catalyzed by FAD synthetase, a product of the FAD1 gene. Expression of FAD1 from the strong constitutive promoter TEF1 resulted in 7- to 15-fold increase in FAD synthetase activity, FAD overproduction, and secretion to the culture medium. The effectiveness of FAD production under different growth conditions by one of these recombinant strains, C. famata T-FD-FM 27, was evaluated. First, the two-level Plackett-Burman design was performed to screen medium components that significantly influence FAD production. Second, central composite design was adopted to investigate the optimum value of the selected factors for achieving maximum FAD yield. FAD production varied most significantly in response to concentrations of adenine, KH2PO4, glycine, and (NH4)2SO4. Implementation of these optimization strategies resulted in 65-fold increase in FAD production when compared to the non-optimized control conditions. Recombinant strain that has been cultivated for 40 h under optimized conditions achieved a FAD accumulation of 451 mg/l. So, for the first time yeast strains overproducing FAD were obtained, and the growth media composition for maximum production of this nucleotide was designed.
Collapse
|
7
|
Hagström AK, Walther A, Wendland J, Löfstedt C. Subcellular localization of the fatty acyl reductase involved in pheromone biosynthesis in the tobacco budworm, Heliothis virescens (Noctuidae: Lepidoptera). INSECT BIOCHEMISTRY AND MOLECULAR BIOLOGY 2013; 43:510-521. [PMID: 23537692 DOI: 10.1016/j.ibmb.2013.03.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/01/2013] [Revised: 03/05/2013] [Accepted: 03/08/2013] [Indexed: 06/02/2023]
Abstract
Sex pheromone components are produced in specialized glands of female moths via well-characterized biosynthetic pathways, where a Fatty Acyl Reductase (FAR) is often essential for producing the specific ratio of the different pheromone components. The subcellular localization and membrane topology of FARs is important for understanding how pheromones are synthesized and exported to the exterior for release. We investigated the subcellular localization of HvFAR from the noctuid moth Heliothis virescens by producing recombinant fusion proteins with green fluorescent protein (GFP) in yeast. A C-terminally tagged construct was localized to the endoplasmic reticulum (ER) and retained full reductive activity on a broad range of saturated and unsaturated fatty acyl precursors. In contrast, an N-terminally-tagged construct was poorly expressed in the cytoplasm and was not enzymatically active, indicating that HvFAR requires a free N-terminal for both proper targeting and catalytic activity. A series of truncations of the N-and C-termini of HvFAR was conducted based on in silico-predicted hydrophobic domains and transmembrane regions. The N-terminally truncated protein was found in the cytoplasm and did not retain activity, emphasizing the importance of the N-terminal for FAR function. In addition, the orientation in the membrane of the C-terminus-tagged HvFAR-GFP construct was analyzed using a fluorescence protease protection (FPP) assay, implying that the C-terminal of HvFAR is orientated towards the cytoplasm. These results, together with previous data on the localization of desaturases, confirm the importance of the ER as a subcellular site of pheromone production.
Collapse
Affiliation(s)
- Asa K Hagström
- Pheromone Group, Department of Biology, Lund University, Sölvegatan 37, SE-223 62 Lund, Sweden.
| | | | | | | |
Collapse
|
8
|
Papon N, Savini V, Lanoue A, Simkin AJ, Crèche J, Giglioli-Guivarc'h N, Clastre M, Courdavault V, Sibirny AA. Candida guilliermondii: biotechnological applications, perspectives for biological control, emerging clinical importance and recent advances in genetics. Curr Genet 2013; 59:73-90. [PMID: 23616192 DOI: 10.1007/s00294-013-0391-0] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2013] [Revised: 03/28/2013] [Accepted: 04/02/2013] [Indexed: 12/11/2022]
Abstract
Candida guilliermondii (teleomorph Meyerozyma guilliermondii) is an ascomycetous species belonging to the Saccharomycotina CTG clade which has been studied over the last 40 years due to its biotechnological interest, biological control potential and clinical importance. Such a wide range of applications in various areas of fundamental and applied scientific research has progressively made C. guilliermondii an attractive model for exploring the potential of yeast metabolic engineering as well as for elucidating new molecular events supporting pathogenicity and antifungal resistance. All these research fields now take advantage of the establishment of a useful molecular toolbox specifically dedicated to C. guilliermondii genetics including the construction of recipient strains, the development of selectable markers and reporter genes and optimization of transformation protocols. This area of study is further supported by the availability of the complete genome sequence of the reference strain ATCC 6260 and the creation of numerous databases dedicated to gene ontology annotation (metabolic pathways, virulence, and morphogenesis). These genetic tools and genomic resources represent essential prerequisites for further successful development of C. guilliermondii research in medical mycology and in biological control by facilitating the identification of the multiple factors that contribute to its pathogenic potential. These genetic and genomic advances should also expedite future practical uses of C. guilliermondii strains of biotechnological interest by opening a window into a better understanding of the biosynthetic pathways of valuable metabolites.
Collapse
Affiliation(s)
- Nicolas Papon
- EA2106, Biomolécules et Biotechnologies Végétales, Faculté de Pharmacie, Université François-Rabelais de Tours, Tours, France.
| | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Dmytruk KV, Sibirny AA. Candida famata (Candida flareri). Yeast 2012; 29:453-8. [DOI: 10.1002/yea.2929] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Revised: 09/21/2012] [Accepted: 09/25/2012] [Indexed: 11/10/2022] Open
Affiliation(s)
- Kostyantyn V. Dmytruk
- Department of Molecular Genetics and Biotechnology, Institute of Cell Biology; National Academy of Sciences (NAS); Lviv; Ukraine
| | | |
Collapse
|
10
|
Ansari SA, Satar R. Recombinant β-galactosidases – Past, present and future: A mini review. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.molcatb.2012.04.012] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
11
|
Abbas CA, Sibirny AA. Genetic control of biosynthesis and transport of riboflavin and flavin nucleotides and construction of robust biotechnological producers. Microbiol Mol Biol Rev 2011; 75:321-60. [PMID: 21646432 PMCID: PMC3122625 DOI: 10.1128/mmbr.00030-10] [Citation(s) in RCA: 243] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Riboflavin [7,8-dimethyl-10-(1'-d-ribityl)isoalloxazine, vitamin B₂] is an obligatory component of human and animal diets, as it serves as the precursor of flavin coenzymes, flavin mononucleotide, and flavin adenine dinucleotide, which are involved in oxidative metabolism and other processes. Commercially produced riboflavin is used in agriculture, medicine, and the food industry. Riboflavin synthesis starts from GTP and ribulose-5-phosphate and proceeds through pyrimidine and pteridine intermediates. Flavin nucleotides are synthesized in two consecutive reactions from riboflavin. Some microorganisms and all animal cells are capable of riboflavin uptake, whereas many microorganisms have distinct systems for riboflavin excretion to the medium. Regulation of riboflavin synthesis in bacteria occurs by repression at the transcriptional level by flavin mononucleotide, which binds to nascent noncoding mRNA and blocks further transcription (named the riboswitch). In flavinogenic molds, riboflavin overproduction starts at the stationary phase and is accompanied by derepression of enzymes involved in riboflavin synthesis, sporulation, and mycelial lysis. In flavinogenic yeasts, transcriptional repression of riboflavin synthesis is exerted by iron ions and not by flavins. The putative transcription factor encoded by SEF1 is somehow involved in this regulation. Most commercial riboflavin is currently produced or was produced earlier by microbial synthesis using special selected strains of Bacillus subtilis, Ashbya gossypii, and Candida famata. Whereas earlier RF overproducers were isolated by classical selection, current producers of riboflavin and flavin nucleotides have been developed using modern approaches of metabolic engineering that involve overexpression of structural and regulatory genes of the RF biosynthetic pathway as well as genes involved in the overproduction of the purine precursor of riboflavin, GTP.
Collapse
Affiliation(s)
| | - Andriy A. Sibirny
- Institute of Cell Biology, NAS of Ukraine, Lviv 79005, Ukraine
- University of Rzeszow, Rzeszow 35-601, Poland
| |
Collapse
|
12
|
Dmytruk KV, Yatsyshyn VY, Sybirna NO, Fedorovych DV, Sibirny AA. Metabolic engineering and classic selection of the yeast Candida famata (Candida flareri) for construction of strains with enhanced riboflavin production. Metab Eng 2010; 13:82-8. [PMID: 21040798 DOI: 10.1016/j.ymben.2010.10.005] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2010] [Revised: 10/21/2010] [Accepted: 10/21/2010] [Indexed: 02/08/2023]
Abstract
Currently, the mutant of the flavinogenic yeast Candida famata dep8 isolated by classic mutagenesis and selection is used for industrial riboflavin production. Here we report on construction of a riboflavin overproducing strain of C. famata using a combination of random mutagenesis based on the selection of mutants resistant to different antimetabolites as well as rational approaches of metabolic engineering. The conventional mutagenesis involved consecutive selection for resistance to riboflavin structural analog 7-methyl-8-trifluoromethyl-10-(1'-d-ribityl)isoalloxazine), 8-azaguanine, 6-azauracil, 2-diazo-5-oxo-L-norleucine and guanosine as well as screening for yellow colonies at high pH. The metabolic engineering approaches involved introduction of additional copies of transcription factor SEF1 and IMH3 (coding for IMP dehydrogenase) orthologs from Debaryomyces hansenii, and the homologous genes RIB1 and RIB7, encoding GTP cyclohydrolase II and riboflavin synthetase, the first and the last enzymes of riboflavin biosynthesis pathway, respectively. Overexpression of the aforementioned genes in riboflavin overproducer AF-4 obtained by classical selection resulted in a 4.1-fold increase in riboflavin production in shake-flask experiments. D. hansenii IMH3 and modified ARO4 genes conferring resistance to mycophenolic acid and fluorophenylalanine, respectively, were successfully used as new dominant selection markers for C. famata.
Collapse
Affiliation(s)
- Kostyantyn V Dmytruk
- Department of Molecular Genetics and Biotechnology, Institute of Cell Biology, NAS of Ukraine, Drahomanov Street 14/16, Lviv 79005, Ukraine
| | | | | | | | | |
Collapse
|
13
|
|
14
|
Yatsyshyn VY, Ishchuk OP, Voronovsky AY, Fedorovych DV, Sibirny AA. Production of flavin mononucleotide by metabolically engineered yeast Candida famata. Metab Eng 2009; 11:163-7. [PMID: 19558965 DOI: 10.1016/j.ymben.2009.01.004] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2008] [Revised: 12/31/2008] [Accepted: 01/20/2009] [Indexed: 11/15/2022]
Abstract
Recombinant strains of the flavinogenic yeast Candida famata able to overproduce flavin mononucleotide (FMN) that contain FMN1 gene encoding riboflavin (RF) kinase driven by the strong constitutive promoter TEF1 (translation elongation factor 1alpha) were constructed. Transformation of these strains with the additional plasmid containing the FMN1 gene under the TEF1 promoter resulted in the 200-fold increase in the riboflavin kinase activity and 100-fold increase in FMN production as compared to the wild-type strain (last feature was found only in iron-deficient medium). Overexpression of the FMN1 gene in the mutant that has deregulated riboflavin biosynthesis pathway and high level of riboflavin production in iron-sufficient medium led to the 30-fold increase in the riboflavin kinase activity and 400-fold increase in FMN production of the resulted transformants. The obtained C. famata recombinant strains can be used for the further construction of improved FMN overproducers.
Collapse
Affiliation(s)
- Valentyna Y Yatsyshyn
- Institute of Cell Biology, National Academy of Sciences of Ukraine, Drahomanov Street, 14/16, Lviv 79005, Ukraine
| | | | | | | | | |
Collapse
|
15
|
Current awareness on yeast. Yeast 2008. [DOI: 10.1002/yea.1461] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
|