hemagglutinin/sarcoom

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Avian sarcoma virus and human immunodeficiency virus, type 1 use different subsets of ESCRT proteins to facilitate the budding process.

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Members of the Nedd4 family of E3 ubiquitin ligases bind the L domain in avian sarcoma virus (ASV) Gag and facilitate viral particle release. Translational fusion of ASV Gag with an L domain deletion (Deltap2b) to proteins that comprise ESCRT-I, -II, and -III (the endocytic sorting complexes

Suppression of glycoprotein formation of Semliki Forest, influenza, and avian sarcoma virus by tunicamycin.

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Tunicamycin, a new antibiotic, halts the formation of physical particles of Semliki forest and fowl plague virus, whereas avian oncornavirus particles which show a reduction in infectivity and do not contain detectable labeled glycoprotein are released in the presence of the drug. In Semliki forest

Apoptotic cell death induced by physarumin (hemagglutinin from myxomycete, Physarum polycephalum).

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Physarumin, a carbohydrate-binding protein (hemagglutinin or lectin), was isolated from the plasmodium of Physarum polycephalum. Physarumin agglutinated not only several species of erythrocytes but also tumor cells such as AH109A ascites hepatoma cells, sarcoma 180 ascites cells and mouse leukemia

Binding and cytotoxicity of Ricinus communis lectins to HeLa cells, Sarcoma 180 ascites tumor cells and erythrocytes.

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The binding of Ricinus communis lectins to HeLa cells, Sarcoma 180 ascites tumor cells and human erythrocytes was studied in detail. Scatchard plots of binding of 125I-lectins to these cells gave biphasic lines except for HeLa cells at 0 degree C. The association constants of lectins for the three

RhoA-GTPase facilitates entry of Kaposi's sarcoma-associated herpesvirus into adherent target cells in a Src-dependent manner.

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Kaposi's sarcoma-associated herpesvirus (KSHV) (human herpesvirus 8) binds to adherent target cell surface heparan sulfate molecules via its envelope glycoproteins gB and gpK8.1A, to integrins via gB, to the transporter CD98/xCT complex, and possibly to another molecule(s). This is followed by virus

Proteins related to the Nedd4 family of ubiquitin protein ligases interact with the L domain of Rous sarcoma virus and are required for gag budding from cells.

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The late assembly (L) domain of retrovirus Gag, required in the final steps of budding for efficient exit from the host cell, is thought to mediate its function through interaction with unknown cellular factors. Here, we report the identification of the Nedd4-like family of E3 ubiquitin protein

Retrovirus-expressed hemagglutinin protects against lethal influenza virus infections.

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An influenza virus hemagglutinin gene, H7, has been expressed in a replication-competent Schmidt-Ruppin Rous sarcoma virus-derived vector. This virus, P1/H7, expressed a glycosylated precursor of the H7 protein which was processed to a mature form and transported to the cell surface. The expressed

A chimeric avian retrovirus containing the influenza virus hemagglutinin gene has an expanded host range.

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We have investigated what protein sequences are necessary for glycoprotein incorporation into Rous sarcoma virus (RSV) virions by utilizing the hemagglutinin (HA) protein of influenza virus. Two chimeric HA genes were constructed. In the first the coding sequence for the signal peptide of the RSV

Rates of evolution of the retroviral oncogene of Moloney murine sarcoma virus and of its cellular homologues.

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A method is proposed for computing the rates of nucleotide substitution for an oncogene of a retrovirus (v-onc), its cellular homologue (c-onc), and the retrovirus genome simultaneously. The method has been applied to DNA sequences of the v-mos gene of Moloney murine sarcoma virus (Mo-MuSV) and the

Avian cells expressing the Newcastle disease virus hemagglutinin-neuraminidase protein are resistant to Newcastle disease virus infection.

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The cDNA derived from the Newcastle disease virus (NDV) hemagglutinin-neuraminidase (HN) gene was inserted into a replication-competent Schmidt-Ruppin Rous sarcoma virus-derived vector. Chick embryo cells transfected with this vector expressed HN-sized protein which could be precipitated with

Role of Nedd4 and ubiquitination of Rous sarcoma virus Gag in budding of virus-like particles from cells.

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Rous sarcoma virus (RSV) budding requires an interaction of the L domain within the p2b region of Gag with cellular Nedd4-family E3 ubiquitin protein ligases. Members of our laboratories previously demonstrated that overexpression of a fragment of the chicken Nedd4-like protein (LDI-1 WW) inhibits

Development of Rous sarcoma Virus-like Particles Displaying hCC49 scFv for Specific Targeted Drug Delivery to Human Colon Carcinoma Cells.

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OBJECTIVE Virus-like particles (VLPs) have been used as drug carriers for drug delivery systems. In this study, hCC49 single chain fragment variable (scFv)-displaying Rous sarcoma virus-like particles (RSV VLPs) were produced in silkworm larvae to be a specific carrier of an anti-cancer

Many peptide fragments of alien antigens are homologous with host proteins, thus canalizing T-cell responses.

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All proteins of this world are constructed in compliance with the same rule. Accordingly, two totally unrelated proteins, on the average, share 30 identical tripeptides, two tetrapeptides, and one pentapeptide per 500 residues. With this in mind, the 221-residue-long influenza virus hemagglutinin II

Increased translocation of bacteria from the gastrointestinal tracts of tumor-bearing mice.

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Aerobic gram-negative bacilli and other indigenous gastrointestinal (GI) bacteria are important opportunistic pathogens in immunosuppressed cancer patients. These same bacteria frequently translocate from the GI tracts of mice immunosuppressed by single injections of certain anticancer drugs or by

The effect of eukaryotic expression vectors and adjuvants on DNA vaccines in chickens using an avian influenza model.

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Vaccination of poultry with naked plasmid DNA has been successfully demonstrated with several different poultry pathogens, but the technology needs to be further developed before it can be practically implemented. Many different methods can conceivably enhance the efficacy of DNA vaccines, and this

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