scholarly journals Characterization of regulatory elements within the coat protein (CP) coding region of Tobacco mosaic virus affecting subgenomic transcription and green fluorescent protein expression from the CP subgenomic RNA promoter

2004 ◽  
Vol 85 (6) ◽  
pp. 1727-1738 ◽  
Author(s):  
Michal Man ◽  
Bernard L. Epel
Keyword(s):  
Green Fluorescent Protein ◽  
Coat Protein ◽  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
Fluorescent Protein ◽  
Regulatory Elements ◽  
Gfp Expression ◽  
Enhancer Element ◽  
Green Fluorescent ◽  
Rna Promoter

A replicon based on Tobacco mosaic virus that was engineered to express the open reading frame (ORF) of the green fluorescent protein (GFP) gene in place of the native coat protein (CP) gene from a minimal CP subgenomic (sg) RNA promoter was found to accumulate very low levels of GFP. Regulatory regions within the CP ORF were identified that, when presented as untranslated regions flanking the GFP ORF, enhanced or inhibited sg transcription and GFP expression. Full GFP expression from the CP sgRNA promoter required more than the first 20 nt of the CP ORF but not beyond the first 56 nt. Further analysis indicated the presence of an enhancer element between nt +25 and +55 with respect to the CP translation start site. The inclusion of this enhancer sequence upstream of the GFP ORF led to elevated sg transcription and to a 50-fold increase in GFP accumulation in comparison with a minimal CP promoter in which the entire CP ORF was displaced by the GFP ORF. Inclusion of the 3′-terminal 22 nt had a minor positive effect on GFP accumulation, but the addition of extended untranslated sequences from the 3′ terminus of the CP ORF downstream of the GFP ORF was basically found to inhibit sg transcription. Secondary structure analysis programs predicted the CP sgRNA promoter to reside within two stable stem–loop structures, which are followed by an enhancer region.

scholarly journals Genetic constructs creation using Golden Gate cloning method

2019 ◽  
Vol 25 ◽  
pp. 190-196 ◽  
Author(s):  
O. I. Varchenko ◽  
B. M. Krasyuk ◽  
A. A. Fedchunov ◽  
O. V. Zimina ◽  
M. F. Parii ◽  
...  
Keyword(s):  
Green Fluorescent Protein ◽  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
Untranslated Region ◽  
Fluorescent Protein ◽  
Regulatory Elements ◽  
Golden Gate ◽  
Genes Encoding ◽  
Green Fluorescent ◽  
Genetic Constructs

Aim. Creation of genetic constructions to study the effects of various regulatory elements, namely promoters, on the expression of GFP reporter protein. Methods. For creation genetic constructs, the method of molecular cloning Golden Gate was used, which allows the rapid creation of genetic vectors using IIS type restriction enzymes and T4 DNA liga-ses. Results. For research six different promoters were selected, namely the 35S CaMV (Cauliflower Mosaic Virus), double 35S CaMV promoter, promoters of the RbcS2B and RbcS1B genes encoding a small subunit of ribulozobisphosphate carboxylase (RuBisCo) isolated from Arabidopsis thaliana (L.) Heynh.; promoters of genes encoding chlorophyll a-b binding proteins (LHB1B1 and LHB1B2) also isolated from A. thaliana (L.) Heynh. All transcription units additionally contained the following elements: the 5'-untranslated region Ω sequence (5’UTR Ω) from the tobacco mosaic virus TMV (Tobacco Mosaic Virus); the coding sequence of the gene gfp (Green Fluorescent Protein) isolated from A. victoria and the 35S Terminator CaMV with the polyadenylation signal and the 3'-untranslated region sequence. As a result, six genetic constructs with different regulatory elements, namely promoters, have been created. Conclusions. To study the effects of various regulatory elements, namely promoters, on the expression of a GFP repor-ter protein in transient or stable genetic transformation of plants the created genetic constructs can be used.Keywords: cloning, genetic constructs, promoters, Green Fluorescent Protein (GFP).

scholarly journals Tobacco Mosaic Virus Movement Protein Interacts with Green Fluorescent Protein-Tagged Microtubule End-Binding Protein 1

2008 ◽  
Vol 147 (2) ◽  
pp. 611-623 ◽  
Author(s):  
Katrin Brandner ◽  
Adrian Sambade ◽  
Emmanuel Boutant ◽  
Pascal Didier ◽  
Yves Mély ◽  
...  
Keyword(s):  
Green Fluorescent Protein ◽  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
Fluorescent Protein ◽  
Movement Protein ◽  
Binding Protein ◽  
Virus Movement ◽  
Green Fluorescent

Confined chromophores in tobacco mosaic virus to mimic green fluorescent protein

2015 ◽  
Vol 51 (82) ◽  
pp. 15122-15124 ◽  
Author(s):  
Quan Zhou ◽  
Fengchi Wu ◽  
Man Wu ◽  
Ye Tian ◽  
Zhongwei Niu
Keyword(s):  
Green Fluorescent Protein ◽  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
Fluorescent Protein ◽  
Fluorescence Emission ◽  
Green Fluorescent

Grafting green fluorescent protein-like chromophores in the 4 nm channel of tobacco mosaic virus greatly enhances its fluorescence emission.

scholarly journals RNA virus interference via CRISPR/Cas13a system in plants

2017 ◽  
Author(s):  
Rashid Aman ◽  
Zahir Ali ◽  
Haroon Butt ◽  
Ahmed Mahas ◽  
Fatima Aljedaani ◽  
...  
Keyword(s):  
Green Fluorescent Protein ◽  
Coat Protein ◽  
Mosaic Virus ◽  
Nicotiana Benthamiana ◽  
Fluorescent Protein ◽  
Phage Genome ◽  
Rna Viruses ◽  
Rna Virus ◽  
Turnip Mosaic Virus ◽  
Green Fluorescent

AbstractCRISPR/Cas systems confer immunity against invading nucleic acids and phages in bacteria and archaea. CRISPR/Cas13a (known previously as C2c2) is a class 2 type VI-A ribonuclease capable of targeting and cleaving single stranded RNA (ssRNA) molecules of the phage genome. Here, we employ CRISPR/Cas13a to engineer interference with an RNA virus, Turnip Mosaic Virus (TuMV), in plants. CRISPR/Cas13a produced interference against green fluorescent protein (GFP) expressing TuMV in transient assays and stable overexpression lines of Nicotiana benthamiana. crRNAs targeting the HC-Pro and GFP sequences exhibited better interference than those targeting other regions such as coat protein (CP) sequence. Cas13a can also process pre-crRNAs into functional crRNAs. Our data indicate that CRISPR/Cas13a can be used for engineering interference against RNA viruses, providing a potential novel mechanism for RNA-guided immunity against RNA viruses, and for other RNA manipulations in plants.

scholarly journals Novel N Gene-Associated, Temperature-Independent Resistance to the Movement of Tobacco Mosaic Virus Vectors Neutralized by a Cucumber Mosaic Virus RNA1 Transgene

2002 ◽  
Vol 76 (24) ◽  
pp. 12908-12916 ◽  
Author(s):  
Tomas Canto ◽  
Peter Palukaitis
Keyword(s):  
Salicylic Acid ◽  
Green Fluorescent Protein ◽  
Tobacco Mosaic Virus ◽  
Cucumber Mosaic Virus ◽  
Mosaic Virus ◽  
Fluorescent Protein ◽  
N Gene ◽  
Nicotiana Glutinosa ◽  
Tobacco Plants ◽  
Green Fluorescent

ABSTRACT The N gene conditions for resistance to Tobacco mosaic virus (TMV) but only below 28°C. However, a TMV-based vector expressing green fluorescent protein (TMV-GFP) showed only limited movement at 33°C in tobacco plants harboring the N gene and other genes cointrogressed from Nicotiana glutinosa. TMV-GFP moved efficiently in tobacco plants that either lacked these genes or that contained the N gene but were transgenic for RNA1 of Cucumber mosaic virus. These findings identified novel temperature-independent resistance to the movement of TMV-GFP which could be neutralized by a different viral transgene. Using the N gene and nahG gene-transgenic tobacco, we show that this novel resistance is manifested specifically by the N gene itself and operates via a pathway independent of salicylic acid.

scholarly journals A macrophage colony-stimulating factor receptor–green fluorescent protein transgene is expressed throughout the mononuclear phagocyte system of the mouse

Blood ◽  
2003 ◽  
Vol 101 (3) ◽  
pp. 1155-1163 ◽  
Author(s):  
R. Tedjo Sasmono ◽  
Delvac Oceandy ◽  
Jeffrey W. Pollard ◽  
Wei Tong ◽  
Paul Pavli ◽  
...  
Keyword(s):  
Green Fluorescent Protein ◽  
Fluorescent Protein ◽  
Mononuclear Phagocyte ◽  
Colony Stimulating Factor ◽  
Enhancer Element ◽  
Macrophage Colony Stimulating Factor ◽  
Macrophage Colony ◽  
Green Fluorescent ◽  
Intron 2 ◽  
Stimulating Factor

AbstractThe c-fms gene encodes the receptor for macrophage colony-stimulating factor (CSF-1). The gene is expressed selectively in the macrophage and trophoblast cell lineages. Previous studies have indicated that sequences in intron 2 control transcript elongation in tissue-specific and regulated expression of c-fms. In humans, an alternative promoter was implicated in expression of the gene in trophoblasts. We show that in mice, c-fmstranscripts in trophoblasts initiate from multiple points within the 2-kilobase (kb) region flanking the first coding exon. A reporter gene construct containing 3.5 kb of 5′ flanking sequence and the downstream intron 2 directed expression of enhanced green fluorescent protein (EGFP) to both trophoblasts and macrophages. EGFP was detected in trophoblasts from the earliest stage of implantation examined at embryonic day 7.5. During embryonic development, EGFP highlighted the large numbers of c-fms–positive macrophages, including those that originate from the yolk sac. In adult mice, EGFP location was consistent with known F4/80-positive macrophage populations, including Langerhans cells of the skin, and permitted convenient sorting of isolated tissue macrophages from disaggregated tissue. Expression of EGFP in transgenic mice was dependent on intron 2 as no lines with detectable EGFP expression were obtained where either all of intron 2 or a conserved enhancer element FIRE (theFms intronic regulatory element) was removed. We have therefore defined the elements required to generate myeloid- and trophoblast-specific transgenes as well as a model system for the study of mononuclear phagocyte development and function.

Green fluorescent protein (GFP) expression patterns in the olfactory epithelium of GFP transgenic cloned Jinhua pigs

2013 ◽  
Vol 95 (3) ◽  
pp. 319-329
Author(s):  
Atsushi Hirao ◽  
Tatsuo Kawarasaki ◽  
Kenjiro Konno ◽  
Satoko Enya ◽  
Masatoshi Shibata ◽  
...  
Keyword(s):  
Green Fluorescent Protein ◽  
Olfactory Epithelium ◽  
Fluorescent Protein ◽  
Expression Patterns ◽  
Gfp Expression ◽  
Green Fluorescent

scholarly journals Cellular Targets of Functional and Dysfunctional Mutants of Tobacco Mosaic Virus Movement Protein Fused to Green Fluorescent Protein

2000 ◽  
Vol 74 (23) ◽  
pp. 11339-11346 ◽  
Author(s):  
Vitaly Boyko ◽  
Jessica van der Laak ◽  
Jacqueline Ferralli ◽  
Elena Suslova ◽  
Myoung-Ok Kwon ◽  
...  
Keyword(s):  
Amino Acids ◽  
Green Fluorescent Protein ◽  
Tobacco Mosaic Virus ◽  
Inclusion Bodies ◽  
Fluorescent Protein ◽  
Movement Protein ◽  
Leading Edge ◽  
Intercellular Transport ◽  
C Terminus ◽  
Green Fluorescent

ABSTRACT Intercellular transport of tobacco mosaic virus (TMV) RNA involves the accumulation of virus-encoded movement protein (MP) in plasmodesmata (Pd), in endoplasmic reticulum (ER)-derived inclusion bodies, and on microtubules. The functional significance of these interactions in viral RNA (vRNA) movement was tested in planta and in protoplasts with TMV derivatives expressing N- and C-terminal deletion mutants of MP fused to the green fluorescent protein. Deletion of 55 amino acids from the C terminus of MP did not interfere with the vRNA transport function of MP:GFP but abolished its accumulation in inclusion bodies, indicating that accumulation of MP at these ER-derived sites is not a requirement for function in vRNA intercellular movement. Deletion of 66 amino acids from the C terminus of MP inactivated the protein, and viral infection occurred only upon complementation in plants transgenic for MP. The functional deficiency of the mutant protein correlated with its inability to associate with microtubules and, independently, with its absence from Pd at the leading edge of infection. Inactivation of MP by N-terminal deletions was correlated with the inability of the protein to target Pd throughout the infection site, whereas its associations with microtubules and inclusion bodies were unaffected. The observations support a role of MP-interacting microtubules in TMV RNA movement and indicate that MP targets microtubules and Pd by independent mechanisms. Moreover, accumulation of MP in Pd late in infection is insufficient to support viral movement, confirming that intercellular transport of vRNA relies on the presence of MP in Pd at the leading edge of infection.

scholarly journals Heterologous Expression of CLIBASIA_03915/CLIBASIA_04250 by Tobacco Mosaic Virus Resulted in Phloem Necrosis in the Senescent Leaves of Nicotiana benthamiana

2020 ◽  
Vol 21 (4) ◽  
pp. 1414 ◽  
Author(s):  
Hui Li ◽  
Xiaobao Ying ◽  
Lina Shang ◽  
Bryce Redfern ◽  
Nicholas Kypraios ◽  
...  
Keyword(s):  
Tobacco Mosaic Virus ◽  
Mosaic Virus ◽  
Nicotiana Benthamiana ◽  
Fluorescent Protein ◽  
Nuclear Localization Sequence ◽  
Localization Sequence ◽  
Candidatus Liberibacter ◽  
Phloem Necrosis ◽  
Liberibacter Asiaticus ◽  
Green Fluorescent

Huanglongbing (HLB), also known as citrus greening, is the most notorious citrus disease worldwide. Candidatus Liberibacter asiaticus (CaLas) is a phloem-restricted bacterium associated with HLB. Because there is no mutant library available, the pathogenesis of CaLas is obscure. In this study, we employed tobacco mosaic virus (TMV) to express two mature secretion proteins CLIBASIA_03915 (m03915) and CLIBASIA_04250 (m04250) in Nicotiana benthamiana (N. benthamiana). Phloem necrosis was observed in the senescent leaves of N. benthamiana that expressed the two low molecular weight proteins, while no phloem necrosis was observed in the plants that expressed the control, green fluorescent protein (GFP). Additionally, no phloem necrosis was observed in the senescent leaves of N. benthamiana that expressed the null mutation of m03915 and frameshifting m04250. The subcellular localizations of m03915 and m04250 were determined by fusion with GFP using confocal microscopy. The subcellular localization of m03915 was found to be as free GFP without a nuclear localization sequence (NLS). However, m04250 did have an NLS. Yeast two-hybrid (Y2H) was carried out to probe the citrus proteins interacting with m03915 and m04250. Six citrus proteins were found to interact with m03915. The identified proteins were involved in the metabolism of compounds, transcription, response to abiotic stress, ubiquitin-mediated protein degradation, etc. The prey of m04250 was involved in the processing of specific pre-mRNAs. Identification of new virulence factors of CaLas will give insight into the pathogenesis of CaLas, and therefore, it will eventually help develop the HLB-resistant citrus.

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