Current Genetics最新文献

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Functional characterization and comparative analysis of gene repression-mediating domains interacting with yeast pleiotropic corepressors Sin3, Cyc8 and Tup1. 酵母多效性共抑制因子Sin3、Cyc8和Tup1相互作用的基因抑制介导域功能表征及比较分析。
IF 2.5 4区 生物学
Current Genetics Pub Date : 2023-06-01 DOI: 10.1007/s00294-023-01262-6
Julia Lettow, Felix Kliewe, Rasha Aref, Hans-Joachim Schüller
{"title":"Functional characterization and comparative analysis of gene repression-mediating domains interacting with yeast pleiotropic corepressors Sin3, Cyc8 and Tup1.","authors":"Julia Lettow,&nbsp;Felix Kliewe,&nbsp;Rasha Aref,&nbsp;Hans-Joachim Schüller","doi":"10.1007/s00294-023-01262-6","DOIUrl":"https://doi.org/10.1007/s00294-023-01262-6","url":null,"abstract":"<p><p>Transcriptional corepressors Sin3, Cyc8 and Tup1 are important for downregulation of gene expression by recruiting various histone deacetylases once they gain access to defined genomic locations by interaction with pathway-specific repressor proteins. In this work we systematically investigated whether 17 yeast repressor proteins (Cti6, Dal80, Fkh1, Gal80, Mig1, Mot3, Nrg1, Opi1, Rdr1, Rox1, Sko1, Ume6, Ure2, Xbp1, Yhp1, Yox1 and Whi5) representing several unrelated regulatory pathways are able to bind to Sin3, Cyc8 and Tup1. Our results show that paired amphipathic helices 1 and 2 (PAH1 and PAH2) of Sin3 are functionally redundant for some regulatory pathways. WD40 domains of Tup1 proved to be sufficient for interaction with repressor proteins. Using length variants of selected repressors, we mapped corepressor interaction domains (CIDs) in vitro and assayed gene repression in vivo. Systematic comparison of CID minimal sequences allowed us to define several related positional patterns of hydrophobic amino acids some of which could be confirmed as functionally supported by site-directed mutagenesis. Although structural predictions indicated that certain CIDs may be α-helical, most repression domains appear to be randomly structured and must be considered as intrinsically disordered regions (IDR) adopting a defined conformation only by interaction with a corepressor.</p>","PeriodicalId":10918,"journal":{"name":"Current Genetics","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10163088/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9682479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Diverse and dynamic forms of gene regulation by the S. cerevisiae histone methyltransferase Set1. 麦角菌组蛋白甲基转移酶 Set1 对基因调控的多样动态形式
IF 2.5 4区 生物学
Current Genetics Pub Date : 2023-06-01 Epub Date: 2023-03-31 DOI: 10.1007/s00294-023-01265-3
Neha Deshpande, Mary Bryk
{"title":"Diverse and dynamic forms of gene regulation by the S. cerevisiae histone methyltransferase Set1.","authors":"Neha Deshpande, Mary Bryk","doi":"10.1007/s00294-023-01265-3","DOIUrl":"10.1007/s00294-023-01265-3","url":null,"abstract":"<p><p>Gene transcription is an essential and highly regulated process. In eukaryotic cells, the structural organization of nucleosomes with DNA wrapped around histone proteins impedes transcription. Chromatin remodelers, transcription factors, co-activators, and histone-modifying enzymes work together to make DNA accessible to RNA polymerase. Histone lysine methylation can positively or negatively regulate gene transcription. Methylation of histone 3 lysine 4 by SET-domain-containing proteins is evolutionarily conserved from yeast to humans. In higher eukaryotes, mutations in SET-domain proteins are associated with defects in the development and segmentation of embryos, skeletal and muscle development, and diseases, including several leukemias. Since histone methyltransferases are evolutionarily conserved, the mechanisms of gene regulation mediated by these enzymes are also conserved. Budding yeast Saccharomyces cerevisiae is an excellent model system to study the impact of histone 3 lysine 4 (H3K4) methylation on eukaryotic gene regulation. Unlike larger eukaryotes, yeast cells have only one enzyme that catalyzes H3K4 methylation, Set1. In this review, we summarize current knowledge about the impact of Set1-catalyzed H3K4 methylation on gene transcription in S. cerevisiae. We describe the COMPASS complex, factors that influence H3K4 methylation, and the roles of Set1 in gene silencing at telomeres and heterochromatin, as well as repression and activation at euchromatic loci. We also discuss proteins that \"read\" H3K4 methyl marks to regulate transcription and summarize alternate functions for Set1 beyond H3K4 methylation.</p>","PeriodicalId":10918,"journal":{"name":"Current Genetics","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9442451","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Morphogenic plasticity: the pathogenic attribute of Candida albicans. 形态发生可塑性:白色念珠菌的致病特性。
IF 2.5 4区 生物学
Current Genetics Pub Date : 2023-06-01 DOI: 10.1007/s00294-023-01263-5
Priya Prasad, Meena Tippana
{"title":"Morphogenic plasticity: the pathogenic attribute of Candida albicans.","authors":"Priya Prasad,&nbsp;Meena Tippana","doi":"10.1007/s00294-023-01263-5","DOIUrl":"https://doi.org/10.1007/s00294-023-01263-5","url":null,"abstract":"<p><p>Candida albicans is a commensal organism of the human gastrointestinal tract and a prevalent opportunistic pathogen. It exhibits different morphogenic forms to survive in different host niches with distinct environmental conditions (pH, temperature, oxidative stress, nutrients, serum, chemicals, radiation, etc.) and genetic factors (transcription factors and genes). The different morphogenic forms of C. albicans are yeast, hyphal, pseudohyphal, white, opaque, and transient gray cells, planktonic and biofilm forms of cells. These forms differ in the parameters like cellular phenotype, colony morphology, adhesion to solid surfaces, gene expression profile, and the virulent traits. Each form is functionally distinct and responds discretely to the host immune system and antifungal drugs. Hence, morphogenic plasticity is the key to virulence. In this review, we address the characteristics, the pathogenic potential of the different morphogenic forms and the conditions required for morphogenic transitions.</p>","PeriodicalId":10918,"journal":{"name":"Current Genetics","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9418231","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 6
Genomic analyses of drug-resistant Salmonella enterica serovar Heidelberg strains isolated from meat and related sources between 2013 and 2017 in the south region of Brazil. 2013年至2017年在巴西南部地区从肉类和相关来源分离的耐药肠沙门氏菌血清型海德堡菌株的基因组分析。
IF 2.5 4区 生物学
Current Genetics Pub Date : 2023-06-01 DOI: 10.1007/s00294-023-01264-4
Felipe Pinheiro Vilela, Dália Dos Prazeres Rodrigues, Marc William Allard, Juliana Pfrimer Falcão
{"title":"Genomic analyses of drug-resistant Salmonella enterica serovar Heidelberg strains isolated from meat and related sources between 2013 and 2017 in the south region of Brazil.","authors":"Felipe Pinheiro Vilela,&nbsp;Dália Dos Prazeres Rodrigues,&nbsp;Marc William Allard,&nbsp;Juliana Pfrimer Falcão","doi":"10.1007/s00294-023-01264-4","DOIUrl":"https://doi.org/10.1007/s00294-023-01264-4","url":null,"abstract":"<p><p>Salmonella enterica serovar Heidelberg (S. Heidelberg) is a zoonotic, ubiquitous, and worldwide-distributed pathogen, responsible for gastroenteritis in humans caused by the consumption of contaminated food. In this study, 11 S. Heidelberg strains isolated from chicken and bovine meat, drag swab, and animal feed between 2013 and 2017 in states of the southern region of Brazil were characterized by whole-genome sequencing (WGS) analyses. Antimicrobial resistance against 18 antimicrobials was determined by disk-diffusion and ciprofloxacin's minimum inhibitory concentration by Etest®. The search for resistance and virulence genes, plasmids, Salmonella Pathogenicity Islands (SPIs) plus multi-locus sequence typing (MLST), and single-nucleotide polymorphisms (SNPs) analyses was conducted using WGS data. All strains harbored resistance genes fosA7, aac(6')-Iaa, sul2, tet(A), bla<sub>CMY-2</sub>, mdsA, and mdsB<sub>,</sub> and point mutations in gyrA and parC. All strains showed a phenotypic multidrug-resistant profile, with resistant or intermediate resistant profiles against 14 antimicrobials tested. Plasmids ColpVC, IncC, IncX1, and IncI1-I(Alpha) were detected. Virulence genes related to adherence, macrophage induction, magnesium uptake, regulation, and type III secretion systems plus 10 SPIs were detected. All strains were assigned to ST15 and belonged to two SNP clusters showing high similarity to isolates from the United Kingdom, Chile, Germany, the Netherlands, China, South Africa, and South Korea. In conclusion, the presence of multidrug-resistant S. Heidelberg strains in Brazil showing a global genomic relationship may alert for the necessity of stronger surveillance measures by food safety and public health authorities to limit its spread to humans and animals through foods.</p>","PeriodicalId":10918,"journal":{"name":"Current Genetics","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"9419640","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Application of nanotags and nanobodies for live cell single-molecule imaging of the Z-ring in Escherichia coli. 应用纳米标签和纳米抗体对大肠杆菌的 Z 环进行活细胞单分子成像。
IF 1.8 4区 生物学
Current Genetics Pub Date : 2023-06-01 Epub Date: 2023-04-06 DOI: 10.1007/s00294-023-01266-2
Emma Westlund, Axel Bergenstråle, Alaska Pokhrel, Helena Chan, Ulf Skoglund, Daniel O Daley, Bill Söderström
{"title":"Application of nanotags and nanobodies for live cell single-molecule imaging of the Z-ring in Escherichia coli.","authors":"Emma Westlund, Axel Bergenstråle, Alaska Pokhrel, Helena Chan, Ulf Skoglund, Daniel O Daley, Bill Söderström","doi":"10.1007/s00294-023-01266-2","DOIUrl":"10.1007/s00294-023-01266-2","url":null,"abstract":"<p><p>Understanding where proteins are localized in a bacterial cell is essential for understanding their function and regulation. This is particularly important for proteins that are involved in cell division, which localize at the division septum and assemble into highly regulated complexes. Current knowledge of these complexes has been greatly facilitated by super-resolution imaging using fluorescent protein fusions. Herein, we demonstrate with FtsZ that single-molecule PALM images can be obtained in-vivo using a genetically fused nanotag (ALFA), and a corresponding nanobody fused to mEos3.2. The methodology presented is applicable to other bacterial proteins.</p>","PeriodicalId":10918,"journal":{"name":"Current Genetics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10163087/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10039095","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
VdERG2 was involved in ergosterol biosynthesis, nutritional differentiation and virulence of Verticillium dahliae. VdERG2参与了大丽花黄萎病麦角甾醇的生物合成、营养分化和毒力过程。
IF 2.5 4区 生物学
Current Genetics Pub Date : 2023-02-01 DOI: 10.1007/s00294-022-01257-9
Junyuan Lv, Shichao Liu, Xiaojian Zhang, Lihong Zhao, Tao Zhang, Zhigang Zhang, Zili Feng, Feng Wei, Jinglong Zhou, Ruiyuan Zhao, Hongjie Feng, Heqin Zhu, Caihong Li, Yalin Zhang
{"title":"VdERG2 was involved in ergosterol biosynthesis, nutritional differentiation and virulence of Verticillium dahliae.","authors":"Junyuan Lv,&nbsp;Shichao Liu,&nbsp;Xiaojian Zhang,&nbsp;Lihong Zhao,&nbsp;Tao Zhang,&nbsp;Zhigang Zhang,&nbsp;Zili Feng,&nbsp;Feng Wei,&nbsp;Jinglong Zhou,&nbsp;Ruiyuan Zhao,&nbsp;Hongjie Feng,&nbsp;Heqin Zhu,&nbsp;Caihong Li,&nbsp;Yalin Zhang","doi":"10.1007/s00294-022-01257-9","DOIUrl":"https://doi.org/10.1007/s00294-022-01257-9","url":null,"abstract":"<p><p>The ergosterol biosynthesis pathway plays an important role in model pathogenic bacteria Saccharomyces cerevisiae, but little is known about the biosynthesis of ergosterol in the pathogenic fungus Verticillium dahliae. In this study, we identified the VdERG2 gene encoding sterol C-8 isomerase from V. dahliae and investigated its function in virulence by generating gene deletion mutants (ΔVdERG2) and complemented mutants (C-ΔVdERG2). Knockout of VdERG2 reduced ergosterol content. The conidial germination rate and conidial yield of ΔVdERG2 significantly decreased and abnormal conidia were produced. In spite of VdERG2 did not affect the utilization of carbon sources by V. dahliae, but the melanin production of ΔVdERG2 was decreased in cellulose and pectin were used as the sole carbon sources. Furthermore, the ΔVdERG2 mutants produced less microsclerotia and melanin with a significant decrease in the expression of microsclerotia and melanin-related genes VaflM, Vayg1, VDH1, VdLAC, VdSCD and VT4HR. In addition, mutants ΔVdERG2 were very sensitive to congo red (CR), sodium dodecyl sulfate (SDS) and hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>) stresses, indicating that VdERG2 was involved in the cell wall and oxidative stress response. The absence of VdERG2 weakened the penetration ability of mycelium on cellophane and affected the growth of mycelium. Although ΔVdERG2 could infect cotton, its pathogenicity was significantly impaired. These phenotypic defects in ΔVdERG2 could be complemented by the reintroduction of a full-length VdERG2 gene. In summary, as a single conservative secretory protein, VdERG2 played a crucial role in ergosterol biosynthesis, nutritional differentiation and virulence in V. dahliae.</p>","PeriodicalId":10918,"journal":{"name":"Current Genetics","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10702501","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Mitochondria in Cryptococcus: an update of mitochondrial transcriptional regulation in Cryptococcus. 隐球菌线粒体:隐球菌线粒体转录调控的最新进展。
IF 2.5 4区 生物学
Current Genetics Pub Date : 2023-02-01 DOI: 10.1007/s00294-023-01261-7
Yang Meng, Chen Ding
{"title":"Mitochondria in Cryptococcus: an update of mitochondrial transcriptional regulation in Cryptococcus.","authors":"Yang Meng,&nbsp;Chen Ding","doi":"10.1007/s00294-023-01261-7","DOIUrl":"https://doi.org/10.1007/s00294-023-01261-7","url":null,"abstract":"<p><p>Encapsulated Cryptococcus species are responsible for approximately 15% of AIDS-related mortality. Numerous intriguing investigations have demonstrated that mitochondria play a crucial role in the pathogen-host axis of microorganisms. Mitochondria are vital energy-generating organelles, but they also regulate a variety of cellular activities, such as fungal adaptability in the host and drug resistance. Mitochondria are also the source of reactive oxygen species, which serve as intracellular messengers but are harmful when produced in excess. Thus, precise and stringent regulation of mitochondrial activity, including oxidative phosphorylation and the ROS detoxification process, is essential to ensure that only the amount required to maintain basic biological activities and prevent ROS toxicity in the cell is maintained. However, the relationship between mitochondria and the pathogenicity of Cryptococcus remains poorly understood. In this review, we focus on transcription regulation and maintenance of mitochondrial function along the pathogen-host interaction axis, as well as prospective antifungal strategies that target mitochondria.</p>","PeriodicalId":10918,"journal":{"name":"Current Genetics","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10720748","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Nonribosomal peptide synthetase gene clusters and characteristics of predicted NRPS-dependent siderophore synthetases in Armillaria and other species in the Physalacriaceae. 蜜环菌及Physalacriaceae其他物种非核糖体肽合成酶基因簇及nrpps依赖性铁载体合成酶预测特征
IF 2.5 4区 生物学
Current Genetics Pub Date : 2023-02-01 DOI: 10.1007/s00294-022-01256-w
Deborah L Narh Mensah, Brenda D Wingfield, Martin P A Coetzee
{"title":"Nonribosomal peptide synthetase gene clusters and characteristics of predicted NRPS-dependent siderophore synthetases in Armillaria and other species in the Physalacriaceae.","authors":"Deborah L Narh Mensah,&nbsp;Brenda D Wingfield,&nbsp;Martin P A Coetzee","doi":"10.1007/s00294-022-01256-w","DOIUrl":"https://doi.org/10.1007/s00294-022-01256-w","url":null,"abstract":"<p><p>Fungal secondary metabolites are often pathogenicity or virulence factors synthesized by genes contained in secondary metabolite gene clusters (SMGCs). Nonribosomal polypeptide synthetase (NRPS) clusters are SMGCs which produce peptides such as siderophores, the high affinity ferric iron chelating compounds required for iron uptake under aerobic conditions. Armillaria spp. are mostly facultative necrotrophs of woody plants. NRPS-dependent siderophore synthetase (NDSS) clusters of Armillaria spp. and selected Physalacriaceae were investigated using a comparative genomics approach. Siderophore biosynthesis by strains of selected Armillaria spp. was evaluated using CAS and split-CAS assays. At least one NRPS cluster and other clusters were detected in the genomes studied. No correlation was observed between the number and types of SMGCs and reported pathogenicity of the species studied. The genomes contained one NDSS cluster each. All NDSSs were multi-modular with the domain architecture (ATC)<sub>3</sub>(TC)<sub>2</sub>. NDSS clusters of the Armillaria spp. showed a high degree of microsynteny. In the genomes of Desarmillaria spp. and Guyanagaster necrorhizus, NDSS clusters were more syntenic with NDSS clusters of Armillaria spp. than to those of the other Physalacriaceae species studied. Three A-domain orthologous groups were identified in the NDSSs, and atypical Stachelhaus codes were predicted for the A3 orthologous group. In vitro biosynthesis of mainly hydroxamate and some catecholate siderophores was observed. Hence, Armillaria spp. generally contain one highly conserved, NDSS cluster although some interspecific variations in the products of these clusters is expected. Results from this study lays the groundwork for future studies to elucidate the molecular biology of fungal phyto-pathogenicity.</p>","PeriodicalId":10918,"journal":{"name":"Current Genetics","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10713453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 2
The essential liaison of two copper proteins: the Cu-sensing transcription factor Mac1 and the Cu/Zn superoxide dismutase Sod1 in Saccharomyces cerevisiae. 酿酒酵母中两种铜蛋白:铜感应转录因子Mac1和铜锌超氧化物歧化酶Sod1之间的重要联系。
IF 2.5 4区 生物学
Current Genetics Pub Date : 2023-02-01 DOI: 10.1007/s00294-022-01258-8
Dimitra Dialynaki, Athanasia Stavropoulou, Maria Laskou, Despina Alexandraki
{"title":"The essential liaison of two copper proteins: the Cu-sensing transcription factor Mac1 and the Cu/Zn superoxide dismutase Sod1 in Saccharomyces cerevisiae.","authors":"Dimitra Dialynaki,&nbsp;Athanasia Stavropoulou,&nbsp;Maria Laskou,&nbsp;Despina Alexandraki","doi":"10.1007/s00294-022-01258-8","DOIUrl":"https://doi.org/10.1007/s00294-022-01258-8","url":null,"abstract":"<p><p>Although copper is an essential trace element for cell function and viability, its excess can lead to protein oxidation, DNA cleavage, and ultimate cell damage. Cells have established a variety of regulatory mechanisms to ensure copper ion homeostasis. In Saccharomyces cerevisiae, copper sensing and response to copper deficiency are regulated by the transcription factor Mac1. Our group has previously reported that in addition to copper, several chromatin proteins modulate Mac1 functionality. In this study, based on a synthetic growth deficiency phenotype, we showed that the Cu/Zn superoxide dismutase Sod1 plays an important role in Mac1 transcriptional activity, in unchallenged nutrient-rich growth conditions. Sod1 is a multipotent cytoplasmic and mitochondrial enzyme, whose main known function is to detoxify the cell from superoxide ions. It has been previously reported that Sod1 also enters the nucleus and affects the transcription of several genes, some of which are involved in copper homeostasis under Cu-depleted (Wood and Thiele in J Biol Chem 284:404-413, 2009) or only under specific oxidative stress conditions (Dong et al. Mol Cell Biol 33:4041-4050, 2013; Tsang et al. Nar Commun 8:3446, 2014). We have shown that Sod1 physically interacts with Mac1 transcription factor and is important for the transactivation as well as its DNA-binding activities. On the other hand, a constitutively active mutant of Mac1 is not affected functionally by the Sod1 ablation, pointing out that Sod1 contributes to the maintenance of the copper-unchelated state of Mac1. In conclusion, we showed that Sod1-Mac1 interaction is vital for Mac1 functionality, regardless of copper medium deficiency, in unchallenged growth conditions, and we suggest that Sod1 enzymatic activity may modify the redox state of the cysteine-rich motifs in the Mac1 DNA-binding and transactivation domains.</p>","PeriodicalId":10918,"journal":{"name":"Current Genetics","volume":null,"pages":null},"PeriodicalIF":2.5,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10777103","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Horizontal transfer of tRNA genes to mitochondrial plasmids facilitates gene loss from fungal mitochondrial DNA. 将 tRNA 基因水平转移到线粒体质粒有利于真菌线粒体 DNA 基因的丢失。
IF 1.8 4区 生物学
Current Genetics Pub Date : 2023-02-01 Epub Date: 2022-11-30 DOI: 10.1007/s00294-022-01259-7
Mathijs Nieuwenhuis, Jeroen Groeneveld, Duur K Aanen
{"title":"Horizontal transfer of tRNA genes to mitochondrial plasmids facilitates gene loss from fungal mitochondrial DNA.","authors":"Mathijs Nieuwenhuis, Jeroen Groeneveld, Duur K Aanen","doi":"10.1007/s00294-022-01259-7","DOIUrl":"10.1007/s00294-022-01259-7","url":null,"abstract":"<p><p>Fungal and plant mitochondria are known to exchange DNA with retroviral plasmids. Transfer of plasmid DNA to the organellar genome is best known and occurs through wholesale insertion of the plasmid. Less well known is the transfer of organellar DNA to plasmids, in particular tRNA genes. Presently, it is unknown whether fungal plasmids can adopt mitochondrial functions such as tRNA production through horizontal gene transfer. In this paper, we studied the exchange of DNA between fungal linear plasmids and fungal mtDNA, mainly focusing on the basidiomycete family Lyophyllaceae. We report at least six independent transfers of complete tRNA genes to fungal plasmids. Furthermore, we discovered two independent cases of loss of a tRNA gene from a fungal mitochondrial genome following transfer of such a gene to a linear mitochondrial plasmid. We propose that loss of a tRNA gene from mtDNA following its transfer to a plasmid creates a mutualistic dependency of the host mtDNA on the plasmid. We also find that tRNA genes transferred to plasmids encode codons that occur at the lowest frequency in the host mitochondrial genomes, possibly due to a higher number of unused transcripts. We discuss the potential consequences of mtDNA transfer to plasmids for both the host mtDNA and the plasmid.</p>","PeriodicalId":10918,"journal":{"name":"Current Genetics","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2023-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9925561/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"10736425","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
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