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Zhu M, Wu N, Zhong J, Chen C, Liu W, Ren Y, Wang X, Jin H. N 6-methyladenosine modification of the mRNA for a key gene in purine nucleotide metabolism regulates virus proliferation in an insect vector. Cell Rep 2024; 43:113821. [PMID: 38368611 DOI: 10.1016/j.celrep.2024.113821] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 01/10/2024] [Accepted: 02/02/2024] [Indexed: 02/20/2024] Open
Abstract
The titer of viruses that persist and propagate in their insect vector must be high enough for transmission yet not harm the insect, but the mechanism of this dynamic balance is unclear. Here, expression of inosine monophosphate dehydrogenase (LsIMPDH), a rate-limiting enzyme for guanosine triphosphate (GTP) synthesis, is shown to be downregulated by increased levels of N6-methyladenosine (m6A) on LsIMPDH mRNA in rice stripe virus (RSV)-infected small brown planthoppers (SBPHs; Laodelphax striatellus), the RSV vector, which decreases GTP content, thus limiting viral proliferation. Moreover, planthopper methyltransferase-like protein 3 (LsMETTL3) and m6A reader protein LsYTHDF3 are found to catalyze and recognize the m6A on LsIMPDH mRNA, respectively, and cooperate in destabilizing LsIMPDH transcripts. Co-silencing assays show that negative regulation of viral proliferation by both LsMETTL3 and LsYTHDF3 is partially dependent on LsIMPDH. This distinct mechanism limits virus replication in an insect vector, providing a potential gene target to block viral transmission.
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Affiliation(s)
- Mengjie Zhu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Nan Wu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Jiayi Zhong
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Chen Chen
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Wenwen Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China
| | - Yingdang Ren
- Institute of Plant Protection, Henan Academy of Agricultural Sciences, Zhengzhou 450002, China
| | - Xifeng Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
| | - Huaibing Jin
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China.
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Wang Y, Xia T, Li C, Zeng D, Xu L, Song L, Yu H, Chen S, Zhao J, Bao X. Promoting Nucleic Acid Synthesis in Saccharomyces cerevisiae through Enhanced Expression of Rrn7p, Rrn11p, IMPDH, and Pho84p. J Agric Food Chem 2023; 71:15224-15236. [PMID: 37811818 DOI: 10.1021/acs.jafc.3c05035] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Saccharomyces cerevisiae has emerged as a preferred source for industrial production of ribonucleic acids (RNAs) and their derivatives, which find wide applications in the food and pharmaceutical sectors. In this study, we employed a modified RNA polymerase I-mediated green fluorescent protein expression system, previously developed by our team, to screen and identify an industrial S. cerevisiae strain with an impressive 18.2% increase in the RNA content. Transcriptome analysis revealed heightened activity of genes and pathways associated with rRNA transcription, purine metabolism, and phosphate transport in the high nucleic acid content mutant strains. Our findings highlighted the crucial role of the transcription factor Sfp1p in enhancing the expression of two key components of the transcription initiation factor complex, Rrn7p and Rrn11p, thereby promoting rRNA synthesis. Moreover, elevated expression of 5'-inosine monophosphate dehydrogenases, regardless of the specific isoform (IMD2, 3, or 4), resulted in increased rRNA synthesis through heightened GTP levels. Additionally, exogenous phosphate application, coupled with overexpression of the phosphate transporter PHO84, led to a 61.4% boost in the RNA yield, reaching 2050.4 mg/L. This comprehensive study provides valuable insights into the mechanism of RNA synthesis and serves as a reference for augmenting RNA production in the food industry.
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Affiliation(s)
- Yun Wang
- College of Bioengineering, Key Laboratory of Shandong Microbial Engineering, State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, 3501 Daxue Road, Jinan 250353, China
| | - Tianqing Xia
- College of Bioengineering, Key Laboratory of Shandong Microbial Engineering, State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, 3501 Daxue Road, Jinan 250353, China
| | - Chenhao Li
- College of Bioengineering, Key Laboratory of Shandong Microbial Engineering, State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, 3501 Daxue Road, Jinan 250353, China
| | - Duwen Zeng
- College of Bioengineering, Key Laboratory of Shandong Microbial Engineering, State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, 3501 Daxue Road, Jinan 250353, China
| | - Lili Xu
- College of Bioengineering, Key Laboratory of Shandong Microbial Engineering, State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, 3501 Daxue Road, Jinan 250353, China
- Shandong Sunkeen Biological Company, 6789 Xingfuhe Road, Jining 273517, China
| | - Liyun Song
- College of Bioengineering, Key Laboratory of Shandong Microbial Engineering, State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, 3501 Daxue Road, Jinan 250353, China
| | - Hengsong Yu
- College of Bioengineering, Key Laboratory of Shandong Microbial Engineering, State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, 3501 Daxue Road, Jinan 250353, China
| | - Shichao Chen
- College of Bioengineering, Key Laboratory of Shandong Microbial Engineering, State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, 3501 Daxue Road, Jinan 250353, China
| | - Jianzhi Zhao
- College of Bioengineering, Key Laboratory of Shandong Microbial Engineering, State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, 3501 Daxue Road, Jinan 250353, China
| | - Xiaoming Bao
- College of Bioengineering, Key Laboratory of Shandong Microbial Engineering, State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, 3501 Daxue Road, Jinan 250353, China
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Cleghorn WM, Burrell AL, Giarmarco MM, Brock DC, Wang Y, Chambers ZS, Du J, Kollman JM, Brockerhoff SE. A highly conserved zebrafish IMPDH retinal isoform produces the majority of guanine and forms dynamic protein filaments in photoreceptor cells. J Biol Chem 2022; 298:101441. [PMID: 34813793 PMCID: PMC8688572 DOI: 10.1016/j.jbc.2021.101441] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2021] [Revised: 11/12/2021] [Accepted: 11/13/2021] [Indexed: 12/18/2022] Open
Abstract
Inosine monophosphate dehydrogenase (IMPDH) is a key regulatory enzyme in the de novo synthesis of the purine base guanine. Dominant mutations in human IMPDH1 cause photoreceptor degeneration for reasons that are unknown. Here, we sought to provide some foundational information on Impdh1a in the zebrafish retina. We found that in zebrafish, gene subfunctionalization due to ancestral duplication resulted in a predominant retinal variant expressed exclusively in rod and cone photoreceptors. This variant is structurally and functionally similar to the human IMPDH1 retinal variant and shares a reduced sensitivity to GTP-mediated inhibition. We also demonstrated that Impdh1a forms prominent protein filaments in vitro and in vivo in both rod and cone photoreceptor cell bodies, synapses, and to a lesser degree, in outer segments. These filaments changed length and cellular distribution throughout the day consistent with diurnal changes in both mRNA and protein levels. The loss of Impdh1a resulted in a substantial reduction of guanine levels, although cellular morphology and cGMP levels remained normal. Our findings demonstrate a significant role for IMPDH1 in photoreceptor guanine production and provide fundamental new information on the details of this protein in the zebrafish retina.
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Affiliation(s)
- Whitney M Cleghorn
- Department of Biochemistry, University of Washington, Seattle, Washington, USA; Department of Ophthalmology, University of Washington, Seattle, Washington, USA
| | - Anika L Burrell
- Department of Biochemistry, University of Washington, Seattle, Washington, USA
| | | | - Daniel C Brock
- Department of Biochemistry, University of Washington, Seattle, Washington, USA
| | - Yekai Wang
- Department of Ophthalmology and Visual Sciences, West Virginia University, Morgantown, West Virginia, USA; Department of Biochemistry, West Virginia University, Morgantown, West Virginia, USA
| | - Zachary S Chambers
- Department of Biochemistry, University of Washington, Seattle, Washington, USA
| | - Jianhai Du
- Department of Ophthalmology and Visual Sciences, West Virginia University, Morgantown, West Virginia, USA; Department of Biochemistry, West Virginia University, Morgantown, West Virginia, USA
| | - Justin M Kollman
- Department of Biochemistry, University of Washington, Seattle, Washington, USA
| | - Susan E Brockerhoff
- Department of Biochemistry, University of Washington, Seattle, Washington, USA; Department of Ophthalmology, University of Washington, Seattle, Washington, USA.
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Pouché L, Stojanova J, Marquet P, Picard N. New challenges and promises in solid organ transplantation pharmacogenetics: the genetic variability of proteins involved in the pharmacodynamics of immunosuppressive drugs. Pharmacogenomics 2016; 17:277-96. [PMID: 26799749 DOI: 10.2217/pgs.15.169] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Interindividual variability in immunosuppressive drug responses might be partly explained by genetic variants in proteins involved in the immune response or associated with IS pharmacodynamics. On a general basis, the pharmacogenetics of drug target proteins is less known and understood than that of proteins involved in drug disposition pathways. The aim of this review is to facilitate research related to the pharmacodynamics of the main immunosuppressive drugs used in solid organ transplantation. We elaborated a quality of evidence grading system based on a literature review and identified 'highly recommended', 'recommended' or 'potential' candidates for further research. It is likely that a number of additional rare variants might further explain drug response phenotypes in transplantation, and particularly the most severe ones. The advent of next-generation sequencing will help to identify those variants.
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Affiliation(s)
- Lucie Pouché
- Inserm, UMR 850, 2 Avenue Martin-Luther King, F-87042 Limoges, France.,CHU Limoges, Department of Pharmacology, Toxicology & Pharmacovigilance, 2 Avenue Martin-Luther King, F-87042 Limoges, France
| | - Jana Stojanova
- Laboratory of Chemical Carcinogenesis & Pharmacogenetics, University of Chile, Santiago, Chile
| | - Pierre Marquet
- Inserm, UMR 850, 2 Avenue Martin-Luther King, F-87042 Limoges, France.,CHU Limoges, Department of Pharmacology, Toxicology & Pharmacovigilance, 2 Avenue Martin-Luther King, F-87042 Limoges, France.,Univ. Limoges, Faculty of Medicine & Pharmacy, 2 rue du Dr Marcland, F-87025 Limoges, France.,FHU SUPORT, 87000 Limoges, France
| | - Nicolas Picard
- Inserm, UMR 850, 2 Avenue Martin-Luther King, F-87042 Limoges, France.,CHU Limoges, Department of Pharmacology, Toxicology & Pharmacovigilance, 2 Avenue Martin-Luther King, F-87042 Limoges, France.,Univ. Limoges, Faculty of Medicine & Pharmacy, 2 rue du Dr Marcland, F-87025 Limoges, France.,FHU SUPORT, 87000 Limoges, France
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Wang J, He K, Xu Q, Chen N. Mutagenetic study of a novel inosine monophosphate dehydrogenase from Bacillus amyloliquefaciens and its possible application in guanosine production. BIOTECHNOL BIOTEC EQ 2014; 28:102-106. [PMID: 26019494 PMCID: PMC4434139 DOI: 10.1080/13102818.2014.901686] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022] Open
Abstract
In this study, the amino acid sequence of inosine monophosphate dehydrogenase (IMPDH) from a guanosine-overproducing strain Bacillus amyloliquefaciens TA208 was found to be highly conserved comparing to its analogue in B. amyloliquefaciens FZB42, only with two substitutions of serine 166 to proline and glutamic acid 481 to lysine. To speculate on the effects of these variation sites, two reverse site-directed mutants P166S and K481E, as well as one deletion mutant IMPDHΔCBS, were characterised. According to the kinetic analysis of these enzymes, site-481 is a key mutation site to affect the nicotinamide adenine dinucleotide (NAD+) affinity, which accounted for the higher catalytic efficiency of IMPDH. On the contrary, mutants P166S and IMPDHΔCBS did not show better catalytic activity compared to normal IMPDH. Moreover, the overexpression of IMPDH-encoding gene guaB in B. amyloliquefaciens TA208 could improve the total production of guanosine up to 13.5 g L-1, which was 20.02% higher than that of the original strain.
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Affiliation(s)
- Jian Wang
- Department of Bioengineering, Jilin University , Changchun , P.R. China
| | - Kuifu He
- Department of Bioengineering, Tianjin University of Science & Technology , Tianjin , P.R. China
| | - Qingyang Xu
- Department of Bioengineering, Tianjin University of Science & Technology , Tianjin , P.R. China
| | - Ning Chen
- Department of Bioengineering, Tianjin University of Science & Technology , Tianjin , P.R. China
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Midtkandal RR, Redpath P, Trammell SAJ, Macdonald SJF, Brenner C, Migaud ME. Novel synthetic route to the C-nucleoside, 2-deoxy benzamide riboside. Bioorg Med Chem Lett 2012; 22:5204-7. [PMID: 22795628 PMCID: PMC3683580 DOI: 10.1016/j.bmcl.2012.06.069] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2012] [Revised: 06/20/2012] [Accepted: 06/22/2012] [Indexed: 11/30/2022]
Abstract
2-Deoxy-C-nucleosides are a subcategory of C-nucleosides that has not been explored extensively, largely because the synthesis is less facile. Flexible synthetic procedures giving access to 2-deoxy-C-nucleosides are therefore of interest. To exemplify the versatility and highlight the limitations of a synthetic route recently developed to that effect, the first synthesis of 2-deoxy benzamide riboside is reported. Biological properties of this novel C-nucleoside are also discussed.
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Affiliation(s)
- Rebecca R Midtkandal
- Queen's University Belfast, John King Laboratory, School of Pharmacy, Lisburn Road, Belfast, BT9 7BL, Northern Ireland, UK
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Morrow CA, Stamp A, Valkov E, Kobe B, Fraser JA. Crystallization and preliminary X-ray analysis of mycophenolic acid-resistant and mycophenolic acid-sensitive forms of IMP dehydrogenase from the human fungal pathogen Cryptococcus. Acta Crystallogr Sect F Struct Biol Cryst Commun 2010; 66:1104-7. [PMID: 20823538 PMCID: PMC2935239 DOI: 10.1107/s1744309110031659] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Accepted: 08/06/2010] [Indexed: 11/10/2022]
Abstract
Fungal human pathogens such as Cryptococcus neoformans are becoming an increasingly prevalent cause of human morbidity and mortality owing to the increasing numbers of susceptible individuals. The few antimycotics available to combat these pathogens usually target fungal-specific cell-wall or membrane-related components; however, the number of these targets is limited. In the search for new targets and lead compounds, C. neoformans has been found to be susceptible to mycophenolic acid through its target inosine monophosphate dehydrogenase (IMPDH); in contrast, a rare subtype of the related C. gattii is naturally resistant. Here, the expression, purification, crystallization and preliminary crystallographic analysis of IMPDH complexed with IMP and NAD+ is reported for both of these Cryptococcus species. The crystals of IMPDH from both sources had the symmetry of the tetragonal space group I422 and diffracted to a resolution of 2.5 A for C. neoformans and 2.6 A for C. gattii.
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Affiliation(s)
- Carl A. Morrow
- Centre for Infectious Disease Research, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Anna Stamp
- Centre for Infectious Disease Research, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Eugene Valkov
- Centre for Infectious Disease Research, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - Bostjan Kobe
- Centre for Infectious Disease Research, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, QLD 4072, Australia
| | - James A. Fraser
- Centre for Infectious Disease Research, School of Chemistry and Molecular Biosciences, The University of Queensland, Brisbane, QLD 4072, Australia
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