Encapsidates the genome, protecting it from nucleases. The encapsidated genomic RNA is termed the NC and serves as template for transcription and replication. Nucleocapsid assembly is concommitant with replication, therefore viral replication depends on the intracellular concentration of free N, termed N(0). All replicative products are resistant to nucleases.
Retrotransposon TYA Gag And TYB Pol Genes; Transcribed/translated As One Unit; Polyprotein Is Processed To Make A Nucleocapsid-like Protein (Gag), Reverse Transcriptase (RT), Protease (PR), And Integrase (IN); Similar To Retroviral Genes
Retrotransposon TYA Gag and TYB Pol genes; transcribed/translated as one unit; polyprotein is processed to make a nucleocapsid-like protein (Gag), reverse transcriptase (RT), protease (PR), and integrase (IN); similar to retroviral genes
Wiki-Pi: a web resource for human protein-protein interactions. It shows genes and PPIs with information about pathways, protein-protein interactions (PPIs), Gene Ontology (GO) annotations including cellular localization, molecular function and biological process, drugs, diseases, genome-wide association studies (GWAS), GO enrichments, PDB ID, Uniprot ID, HPRD ID, and word cloud from pubmed abstracts.
TY - JOUR. T1 - Nucleocapsid and glycoprotein organization in an enveloped virus. AU - Holland Cheng, R.. AU - Kuhn, Richard J.. AU - Olson, Norman H.. AU - Rossmann^Hok-Kin Choi, Michael G.. AU - Smith, Thomas J.. AU - Baker, Timothy S.. PY - 1995/2/24. Y1 - 1995/2/24. N2 - Alphaviruses are a group of icosahedral, positive-strand RNA, enveloped viruses. The membrane bilayer, which surrounds the ∼ 400 Å diameter nucleocapsid, is penetrated by 80 spikes arranged in a T = 4 lattice. Each spike is a trimer of heterodimers consisting of glycoproteins Ell and E2. Cryoelectron microscopy and image reconstruction of Ross River virus showed that the T=4 quaternary structure of the nucleocapsid consists of pentamerand hexamer clusters of the capsid protein, but not dimers, as have been observed in several crystallographic studies. The E1-E2 heterodimers form one-to-one associations with the nucleocapsid monomers across the lipid bilayer. Knowledge of the atomic structure of the capsid protein and our ...
Rabbit polyclonal H1N1 Influenza A virus Nucleocapsid protein antibody validated for WB, ELISA, ICC/IF and tested in InfA. Immunogen corresponding to synthetic…
SARS Nucleocapsid Protein Antibodies available through Novus Biologicals. Browse our SARS Nucleocapsid Protein Antibody catalog backed by our Guarantee+.
Recombinant SARS-CoV-2 Nucleocapsid (N) Protein - Cat. No. 10-067 | ProSci can be used to detect Virus Recombinant SARS-CoV-2, Nucleocapsid (N) Protein - 100 µg in ELISA, WB and other applications.
Recombinant SARS-CoV-2 (2019-nCoV) Nucleocapsid Protein is produced by our E.coli expression system and the target gene encoding Met1-Ala419 is expressed with a 6His tag at the N-terminus. Bon Opus Cat.# DRA31
We have professional and advanced research and production capacity for Nucleocapsid/NP reagents production, including Proteins, Antibodies, cDNA Clones,etc. All NP products are produced in house and quality controlled.
TY - JOUR. T1 - Preparation of viral DNA from nucleocapsids. AU - Szpara, Moriah L.. AU - Tafuri, Yolanda R.. AU - Enquist, L. W.. PY - 2011/8/1. Y1 - 2011/8/1. N2 - Viruses are obligate cellular parasites, and thus the study of their DNA requires isolating viral material away from host cell contaminants and DNA. Several downstream applications require large quantities of pure viral DNA, which is provided by this protocol. These applications include viral genome sequencing, where the removal of host DNA is crucial to optimize data output for viral sequences, and the production of new viral recombinant strains, where co-transfection of purified plasmid and linear viral DNA facilitates recombination.1,2,3 This procedure utilizes a combination of extractions and density-based centrifugation to isolate purified linear herpesvirus nucleocapsid DNA from infected cells.4,5 The initial purification steps aim to isolate purified viral capsids, which contain and protect the viral DNA during the ...
Retrotransposon TYA Gag And TYB Pol Genes; Transcribed/translated As One Unit; Polyprotein Is Processed To Make A Nucleocapsid-like Protein (Gag), Reverse Transcriptase (RT), Protease (PR), And Integrase (IN); Similar To Retroviral Genes
DNA sequence encoding the COVID-19 Nucleocapsid protein domain ,amino acids[1-419] (accession# YP_009724397.2) including a C-terminal His tag was expressed in CHO Cells.
Bonjour mon ordi est infecté par le virus N039. Voici le rapport dhijackthis: Logfile of Trend Micro HijackThis v2.0.0 (BETA) Scan saved at 14:46:31, on 02/10/2007 Platform: Windows XP SP2 (WinN
HIV nucleocapsid protein. Molecular model of the nucleocapsid protein (blue) from HIV-1 (human immunodeficiency virus-type 1) complexed with the Psi RNA (ribonucleic acid) packaging element (pink). The Psi element is involved in the packaging of viral RNA into the capsid during replication. - Stock Image C025/1461
Looking for online definition of nucleocapsids in the Medical Dictionary? nucleocapsids explanation free. What is nucleocapsids? Meaning of nucleocapsids medical term. What does nucleocapsids mean?
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Looking for nucleocapsids? Find out information about nucleocapsids. The nucleic acid of a virus and its surrounding capsid Explanation of nucleocapsids
A Sandwich ELISA kit to Quantitatively measure Nucleocapsid protein in bronchoalveolar lavage fluid and nasopharyngeal swab samples
We tested the hypothesis that HBV Pol recognizes the 5′ cap structure via its interaction with eIF4E. Here, we showed that HBV Pol directly interacts with eIF4E using coimmunoprecipitation (Fig. 2), which demonstrated that the eIF4E-Pol interaction is enhanced significantly by ε RNA, and implicating the formation of an eIF4E-Pol-ε ribonucleoprotein (RNP) complex prior to nucleocapsid assembly (Fig. 2). Further, we showed that eIF4E was incorporated into the nucleocapsid along with HBV Pol, indicating that the eIF4E interacts with the Pol-ε RNP complex during nucleocapsid assembly (Fig. 7). To our knowledge, it is unprecedented that a translation factor such as eIF4E is incorporated into viral nucleocapsid particles.. The pgRNA could enhance the HBV Pol-eIF4E interaction as a consequence of tethering, since both HBV Pol and eIF4E could bind to the pgRNA independently via their respective binding to epsilon and cap structure, respectively (Fig. 1). To preclude the tethering effect, we ...
Author: Lucic, V. et al.; Genre: Journal Article; Published in Print: 2008-08; Keywords: cryo-electron tomography; correlative light microscopy; electron microscopy; Title: Cryo-electron tomography of cells: connecting structure and function
IF: 4.606] GENOME REPLICATION AND REGULATION OF VIRAL GENE EXPRESSION: Porcine Reproductive and Respiratory Syndrome Virus Nucleocapsid Protein Interacts with Nsp9 and Cellular DHX9 To Regulate Viral RNA ...
Cryo-electron tomography (cryo-ET) allows the visualization of cellular structures under close-to-life conditions and at molecular resolution. While it is inherently a static approach, yielding struct
IFI16 was demonstrated to bind to DNA of nucleus-replicating herpesviruses (2, 6); however, the full range of its functional outputs is not understood. In this study, we observed the rapid formation of IFI16 subnuclear puncta located exclusively at the nuclear periphery upon infection with herpesviruses HSV-1 and HCMV. This dynamic behavior was maintained during infection with the transcription- and replication-deficient d109 HSV-1 mutant, suggesting that only the viral nucleocapsid and genome are required to trigger IFI16 peripheral focus formation. The d109 viral genome has been previously shown to persist within infected nuclei (34), explaining why assembly of peripheral foci continues into later hours of infection. Furthermore, these intranuclear foci were dependent on the MOI and formed instantaneously at sites directly adjacent to where the viral nucleocapsid binds on the outer nuclear membrane. The earliest viral genomes are deposited in the nucleus within 1 h of HSV-1 virion adsorption ...
For example, the researchers now know that most of the fibers are usually bound to the virus head rather than extended, as was previously thought. That those fibers are in a dynamic equilibrium between bound and extended states is also new. Molineux said that the idea that phages walk over the cell surface was previously proposed, but their paper provides the first experimental evidence that this is the case. This is also the first time that scientists have made actual images showing how the viruss tail extends into the host - the very action that allows it to infect a cell with its DNA.. I first hypothesized that T7 made an extended tail more than 10 years ago, said Molineux, but this is the first irrefutable experimental evidence for the idea and provides the first images of what it looks like.. The researchers used a combination of genetics and cryo-electron tomography to image the infection process. Cryo-electron tomography is a process similar to a CT scan, but it is scaled to study ...
Retrotransposon TYA Gag gene co-transcribed with TYB Pol; translated as TYA or TYA-TYB polyprotein; Gag is a nucleocapsid protein that is the structural constituent of virus-like particles (VLPs); similar to retroviral Gag
Other ORFs on the one-third of the genome near the 3-terminus encodes at least four main structural protein: spike (S), membrane (M), envelope (E) and nucleocapsid (N) proteins. Besides these four main structural proteins, such as HE protein, 3a/b protein, and 4a/b protein. All the structural and accessory proteins are translated from the from the…
Infection with MARVPSAPmut results in compact inclusion bodies and accumulation of nucleocapsids in the periphery of cells.Huh-7 cells were infected with rMARVw
TY - JOUR. T1 - TBK1 mediates critical effects of measles virus nucleocapsid protein (MVNP) on pagetic osteoclast formation. AU - Sun, Quanhong. AU - Sammut, Bénédicte. AU - Wang, Feng Ming. AU - Kurihara, Noriyoshi. AU - Windle, Jolene J.. AU - Roodman, G. David. AU - Galson, Deborah L.. PY - 2014/1. Y1 - 2014/1. N2 - Pagets disease of bone (PDB) is characterized by abnormal osteoclasts with unique characteristics that include increased sensitivity of osteoclast progenitors to 1,25(OH)2D3, receptor activator of NF-κB ligand (RANKL), and TNF-α; increased osteoclast numbers; and increased expression of IL-6 and several transcription factors. We recently reported that measles virus nucleocapsid protein (MVNP) plays a key role in the development of these abnormal osteoclasts. MVNP can induce the pagetic osteoclast phenotype in vitro and in vivo in TRAP-MVNP transgenic mice. However, the molecular mechanisms by which MVNP generates pagetic osteoclasts have not been determined. TANK-binding ...
Hendra virus (HeV) is a recently emerged severe human pathogen that belongs to the Henipavirus genus within the Paramyxoviridae family. The HeV genome is encapsidated by the nucleoprotein (N) within a helical nucleocapsid. Recruitment of the viral polymerase onto the nucleocapsid template relies on the interaction between the C-terminal domain, N(TAIL), of N and the C-terminal X domain, XD, of the polymerase co-factor phosphoprotein (P). Here, we provide an atomic resolution description of the intrinsically disordered N(TAIL) domain in its isolated state and in intact nucleocapsids using nuclear magnetic resonance (NMR) spectroscopy. Using electron microscopy, we show that HeV nucleocapsids form herringbone-like structures typical of paramyxoviruses. We also report the crystal structure of XD of P that consists of a three-helix bundle. We study the interaction between N(TAIL) and XD using NMR titration experiments and provide a detailed mapping of the reciprocal binding sites. We show that the
Genome packaging is a key step in retrovirus replication. Two copies of the virus RNA are specifically selected and packaged into an assembling virion. The nucleocapsid (NC) domain of the Gag polyprotein and the packaging signal (?-site) region of the genomic RNA are critical to this process. Different packaging mechanisms have been proposed for HIV-1 and HIV-2. In HIV-1, the ?-site is downstream of the major splice donor (SD), and any splicing removes both NC binding sites. The proposed HIV-2 ?-site is upstream of the SD. A co-translational packaging hypothesis was presented explaining this contradiction. In this mechanism, NC binds the full-length RNA from which it was translated. Other studies indicated the region between the SD and the Gag initiation codon is critical for NC binding and genome packaging. This finding supports the hypothesis that HIV-1 and HIV-2 package their genomes in a similar manner. However, the minimal NC binding domain(s) in HIV-2 had not been determined. The work ...
US Air Force Research Lab. Monday, April 24, 2017, Colloquia Auditorium. Electron microscopy has been one of the robust tools in characterizing the life cycle of viruses, such as Semliki Forest Virus (SFV), an alphavirus that belongs to Togavirus family and causes encephalitis in human. The viral particle of SFV is composed of a nucleocapsid enclosed by a lipid-anchored glycoprotein spikes and infects cell through clathrin-dependent endocytosis pathway where it releases the nucleocapsid into the cytoplasm after membrane fusion at the late endosome. Cryo-electron microscopy and single particle reconstruction revealed the structure of SFV virion that both the nucleocapsid and surface spikes adapted into icosahedral symmetry with T4 surface lattice and that the connection between nucleocapsid protein and C-terminal tail of the glycoprotein stabilizes the particle integrity. Mutation at nucleocapsid does not changed the assembly of the viral particle although truncation at the RNA-binding domain ...
Porcine deltacoronavirus (PDCoV) is a newly detected porcine coronavirus causing serious vomiting and diarrhea in piglets, especially newborn piglets. There has been an outbreak of PDCoV in worldwide since 2014, causing significant economic losses in the pig industry. The interferon (IFN)-mediated antiviral response is an important component of virus-host interactions and plays an essential role in inhibiting virus infection. However, the mechanism of PDCoV escaping the porcine immune surveillance is unclear. In the present study, we demonstrated that the PDCoV nucleocapsid (N) protein antagonizes porcine IFN-β production after vesicular stomatitis virus (VSV) infection or poly(I:C) stimulation. PDCoV N protein also suppressed the activation of porcine IFN-β promoter when it was stimulated by porcine RLR signaling molecules. PDCoV N protein targeted porcine retinoic acid-inducible gene I (pRIG-I) and porcine TNF receptor associated factor 3 (pTRAF3) by directly interacting with them. The N-terminal
Serum samples from 317 patients with patients with severe acute respiratory syndrome (SARS) were tested for the nucleocapsid (N) protein of SARS-associated coronavirus, with sensitivities of 94% and 78% for the first 5 days and 6-10 days after onset, respectively. The specificity was 99.9%. N protein can be used as an early diagnostic maker for SARS ...
Prevents the establishment of cellular antiviral state by blocking the interferon-alpha/beta (IFN-alpha/beta) and IFN-gamma signaling pathways. Blocks the IFN-induced nuclear accumulation of host phosphorylated STAT1, by interacting with the STAT1-binding region of host importin alpha-1/KPNA1 protein, thereby inhibiting the latter. Without the activity of this protein, activated STAT1 would not enter the nucleus and be unable to activate IFN-induced genes. Plays a role in assembly of viral nucleocapsid and virion budding. May act as a minor matrix protein that plays a role in assembly of viral nucleocapsid and virion budding.
Profiles of antibodies towards the nucleocapsid proteins from the severe acute respiratory symptoms (SARS)-associated coronavirus in 445 possible SARS sufferers and 3,749 healthy people or non-SARS sufferers were analyzed by antigen-capturing enzyme-linked immunosorbent assay. and non-SARS sufferers, just seven (0.187%) were weakly positive. The novel serious acute respiratory symptoms (SARS)-linked coronavirus (CoV) continues to be defined as the etiologic Rabbit polyclonal to MAP1LC3A. agent of SARS (1, 3, 5). Its been confirmed that, at least in early replies, the antibodies towards the nucleocapsid proteins (N proteins) predominate, as assayed by Traditional western blotting and proteomic evaluation. To comprehend the humoral immunity towards the N proteins of SARS CoV and the chance of using the N proteins in MP470 SARS medical diagnosis, antibodies towards the N proteins from 445 sufferers who acquired SARS most likely, as diagnosed based on World Health Firm requirements, from four ...
1DSQ: The NMR structure of the nucleocapsid protein from the mouse mammary tumor virus reveals unusual folding of the C-terminal zinc knuckle.
Results The LVP consists of a broad nucleocapsid surrounding an electron-dense centre, presumably containing the HCV genome. The nucleocapsid is surrounded by an irregular, detergent-sensitive crescent probably composed of lipids. Lipid content may determine particle size. These particles carry HCV E1E2, ApoB and ApoE, as shown in our immuno-EM analysis. Our results also suggest that these putative LVPs circulate in the serum of patients as part of a mixed population, including lipoprotein-like particles and complete viral particles. ...
Results The LVP consists of a broad nucleocapsid surrounding an electron-dense centre, presumably containing the HCV genome. The nucleocapsid is surrounded by an irregular, detergent-sensitive crescent probably composed of lipids. Lipid content may determine particle size. These particles carry HCV E1E2, ApoB and ApoE, as shown in our immuno-EM analysis. Our results also suggest that these putative LVPs circulate in the serum of patients as part of a mixed population, including lipoprotein-like particles and complete viral particles. ...
The issue of protein dynamics and its implications in the biological function of proteins are arousing greater and greater interest in different fields of molecular biology. In cryo-electron tomography experiments one may take several snapshots of a given biological macromolecule. In principle, a large enough collection of snapshots of the molecule may then be used to calculate its equilibrium configuration in terms of the experimentally accessible degrees of freedom and, hence, to estimate its potential energy. This information would be crucial in order to analyze the biological functions of biomolecules by directly accessing the relevant dynamical indicators. In this article, we analyze the results of cryo-electron tomography experiments performed on monoclonal murine IgG2a antibodies. We measure the equilibrium distribution of the molecule in terms of the relevant angular coordinates and build a mechanical model of the antibody dynamics. This approach enables us to derive an explicit ...
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E1 is a class II viral fusion protein. This trimeric (low-pH-iduced) form is fusion active, and promotes release of viral nucleocapsid in cytoplasm after cell and viral membrane fusion. Efficient fusion requires the presence of cholesterol and sphingolipid in the target membrane. N-terminal domain of this protein: 1dyl(NMR), 1vcp, 1vcq ...
1HVO: Zinc- and sequence-dependent binding to nucleic acids by the N-terminal zinc finger of the HIV-1 nucleocapsid protein: NMR structure of the complex with the Psi-site analog, dACGCC.
The E.coli derived recombinant protein fused to a His tag contains the HCV core nucleocapsid immunodominant regions, amino acids 2-119.
Shi, Y.; Yi, Y.; Li, P.; Kuang, T.; Li, L.; Dong, M.; Ma, Q.; Cao, C., 2003: Diagnosis of severe acute respiratory syndrome (SARS) by detection of SARS coronavirus nucleocapsid antibodies in an antigen-capturing enzyme-linked immunosorbent assay
In a previous study, a scFv phage display library against white spot syndrome virus (WSSV) was constructed and yielded a clone designated A I with conformational specificity against native but not denatured viral antigen. Although the clone A1 has been used successfully as a diagnostic antibody, its precise target antigen has not been elucidated. A different strategy was adopted involving the construction of a second T7 phage display library utilizing mRNA isolated from shrimp infected with WSSV. Following RT-PCR and T7 phage library construction, phages displaying the candidate epitope were selected with A I scFv. Since successive enrichment steps were not associated with an increased titer of the phages, enrichment after successive tests was confirmed by PCR resulting in the prefer-red selection of a specific DNA sequence encoding a novel nucleocapsid protein WSSV388. Immune electron microscopy revealed that WSSV388 is located on the nucleocapsid. This result demonstrated that unknown antigen ...
Summary Antigenic and structural variation in the major nucleocapsid protein, VPN41, from different strains of respiratory syncytial (RS) virus was observed using a combination of monoclonal antibodies and two-dimensional peptide mapping. Limited trypsin treatment of intact nucleocapsids produced two peptide fragments M r 27K and M r 14K. Two monoclonal antibodies, N1 and N2, reactive with primary sequence epitopes located on intact nucleocapsids also reacted with either the 27K fragment (N2) or the 14K fragment (N1). Competitive radioimmunoassay studies using N1 and N2 antibodies revealed two discrete antigenic groups among the seven human strains of RS virus examined. A bovine strain of RS virus, although antigenically similar to the human strain of RS virus, was placed in a separate group. Two-dimensional peptide mapping of 125I-labelled VPN41 purified by SDS-PAGE revealed extensive structural homology between all strains. However, several unique tryptic/chymotryptic peptides supported the grouping
Porcine reproductive and respiratory syndrome virus (PRRSV) is an arterivirus responsible for a widespread contagious disease of domestic pigs with high economic impact. Switzerland is one of the rare PRRSV-free countries in Europe, although sporadic outbreaks have occurred in the past. The PRRSV isolate IVI-1173 from the short outbreak in Switzerland in 2012 was entirely sequenced, and a functional full-length cDNA clone was constructed. Genetic and antigenic characterization of IVI-1173 revealed the importance of amino acid 90 of the nucleocapsid protein N as part of a conformational epitope. IVI-1173 was not detected by SDOW17, a monoclonal antibody against N widely used to detect PRRSV-infected cells. Substitution of alanine at position 90 of N [N(A90)] with a threonine [N(T90)] restored reactivity of vIVI1173-N(T90) to SDOW17 completely. The relevance of this amino acid for the conformational SDOW17 epitope of PRRSV N was further confirmed by the opposite substitution in a functional cDNA clone of
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Structure of the equine arteritis virus nucleocapsid protein reveals a dimer-dimer arrangement. Acta Crystallographica Section D: Biological Crystallography. 63:581-586. 2007 ...
In recent years, cryo-electron tomography (cryo-ET) has emerged as a powerful method for visualizing the molecular organization of unperturbed cellular landscapes with the potential to attain near-atomic resolution ...