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Vaccinia virus E10R protein is associated with the membranes of intracellular mature virions and has a role in morphogenesis.
Vaccinia virus E10R protein is associated with the membranes of intracellular mature virions and has a role in morphogenesis.
- Source :
-
Virology [Virology] 2000 Dec 05; Vol. 278 (1), pp. 244-52. - Publication Year :
- 2000
-
Abstract
- This study provides the initial biochemical, microscopic, and genetic characterization of the product of the vaccinia virus E10R gene, which belongs to the ERV1/ALR family of eukaryotic proteins, is conserved in all poxviruses and has homologs in other cytoplasmic DNA viruses. DNA encoding a short epitope tag was appended to the C-terminus of the 95-amino-acid open-reading frame without affecting virus reproduction. The E10R protein was synthesized after DNA replication and was associated with purified intracellular mature virions (IMV), from which it could be extracted with a nonionic detergent. Antibody to the tag decorated the surface of IMV, consistent with the anchorage of the E10R protein to the membrane via its hydrophobic N-terminus. Immunoelectron microscopy revealed that the E10R protein was associated with crescent membranes, immature virions, IMV, and extracellular particles. To investigate the role of E10R in the virus life cycle, we constructed an inducer-dependent null mutant. In the absence of inducer, the formation of infectious virus was severely inhibited and electron microscopy revealed an assembly block with accumulation of crescent membranes and immature virions. Cysteines 43 and 46, comprising a putative redox motif common to all poxvirus E10R homologs, were essential for complementation of the mutant virus by transfected E10R DNA.<br /> (Copyright 2000 Academic Press.)
- Subjects :
- Animals
Cell Cycle
Cell Line
Cell Membrane virology
Electrophoresis, Polyacrylamide Gel
Isopropyl Thiogalactoside pharmacology
Microscopy, Immunoelectron
Mutation
Vaccinia virus chemistry
Vaccinia virus isolation & purification
Viral Proteins analysis
Viral Proteins genetics
Virion chemistry
Virion genetics
Vaccinia virus physiology
Viral Proteins physiology
Virion physiology
Virus Replication drug effects
Subjects
Details
- Language :
- English
- ISSN :
- 0042-6822
- Volume :
- 278
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Virology
- Publication Type :
- Academic Journal
- Accession number :
- 11112499
- Full Text :
- https://doi.org/10.1006/viro.2000.0656