Control of Cytoplasmic Maturation Events by Cytomegalovirus Tegument Protein pp150

作者: Ritesh Tandon , Edward S. Mocarski

DOI: 10.1128/JVI.00533-08

关键词:

摘要: Cytomegalovirus replication depends upon a betaherpesvirus-conserved 150-kDa tegument phosphoprotein (pp150; encoded by UL32) that supports the final steps in virion maturation at cytoplasmic assembly compartments. Amino acid substitutions were introduced into conserved region 1 (CR1) and CR2 of pp150, affecting may interact with nucleocapsids. Two independent point mutants (N201A G207A) failed to support viral evaluations transient complementation assay or after reconstruction recombinant viruses. An compartment-like inclusion developed UL32 mutant virus-infected cells was similar wild-type cells. The cellular localization trans-Golgi marker Golgin-97 suggested differences organization compartment compared Replication-defective exhibited same phenotype as virus carrying complete deletion open reading frame these assays. Electron micrographs fibroblasts 3 5 days postinfection (ΔUL32) grown on UL32-complementing showed number morphology capsids nucleus, but associated appeared highly vesiculated contained few recognizable nucleocapsids particles. These data demonstrate principle role pp150 is retain nucleocapsid through secondary envelopment compartment.

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