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The F16L gene of vaccinia virus (VACV) is conserved in all chordopoxviruses except avipoxviruses. The crocodile poxvirus F16 protein ortholog has highly significant similarity to prokaryotic serine recombinases and contains all amino acids that comprise the catalytic site. In contrast, F16 orthologs encoded by other poxviruses show only marginally significant similarity to serine recombinases, lack...
Vaccinia virus (VACV) encodes DNA polymerase and additional proteins that enable cytoplasmic replication. We confirmed the ability of VACV DNA ligase mutants to replicate and tested the hypothesis that cellular ligases compensate for loss of viral gene expression. RNA silencing of human DNA ligase I expression and a small molecule inhibitor of human DNA ligase I severely reduced replication of viral...
Of the vaccinia virus genes that are conserved in all sequenced poxviruses, each one except for VACWR084 (G6R) has been at least partially characterized. The poxvirus protein encoded by G6R belongs to the NlpC/P60 superfamily, which consists of proteins with a papain-like fold and known or predicted protease, amidase or acyltransferase activity. The G6 protein was synthesized late in infection and...
In this article we report the initial biochemical, genetic, and electron microscopic analysis of a previously uncharacterized, 8.9-kDa, predicted thiol-redox protein. The name A2.5L was assigned to the corresponding vaccinia virus gene, which is conserved in all sequenced poxviruses. Multiple alignment analysis and secondary structure prediction indicated that the A2.5L gene product is an all-α-helical...
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...
Molluscum contagiosum virus encodes more than 150 proteins including some involved in host interactions that might contribute to prolonged viral replication in the skin. These include homologs of a selenocysteine-containing glutathione peroxidase, a death effector domain protein, a chemokine, a major histocompatibility complex class I molecule and an interleukin-18-binding protein.
The MC80R gene of molluscum contagiosum virus (MCV) type 1 encodes a major histocompatibility complex (MHC) class I homolog that lacks several amino-acid residues critical for peptide binding by MHC molecules, contains an unusually long N-terminal hydrophobic domain possibly derived by triplication of a signal peptide, and has a C-terminal transmembrane domain with two glutamate residues. All of these...
Analysis of the molluscum contagiosum virus (MCV) genome revealed that it encodes approximately 182 proteins, 105 of which have direct counterparts in orthopoxviruses (OPV). The corresponding OPV proteins comprise those known to be essential for replication as well as many that are still uncharacterized, including 2 of less than 60 amino acids that had not been previously noted. The OPV proteins most...
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