title: Efficient incorporation of tegument proteins pUL46, pUL49, and pUS3 into pseudorabies virus particles depends on the presence of pUL21.
abstract: The mature virion of the alphaherpesvirus pseudorabies virus (PrV) contains a minimum of 31 structural proteins which are recruited into the virus particle by a network of protein-protein interactions which is only incompletely understood. We show here that deletion of the tegument protein pUL21 resulted in a drastic decrease in the incorporation of the pUL46, pUL49, and pUS3 tegument components into mature virions. Moreover, the attenuated PrV strain Bartha (PrV-Ba), which, among other defects, carries mutations in pUL21, also fails to package pUL46, pUL49, and pUS3 efficiently. By the reconstitution of wild-type pUL21 expression to PrV-Ba and the transfer of mutated PrV-Ba pUL21 into wild-type PrV, we demonstrate that this phenotype is due to the mutated pUL21.
authors.affiliation: Institute of Molecular Biology, Friedrich-Loeffler-Institut, 17493 Greifswald-Insel Riems, Germany.
authors.forename: Kathrin
authors.initials: K
authors.lastname: Michael
authors.forename: Barbara G
authors.initials: BG
authors.lastname: Klupp
authors.forename: Axel
authors.initials: A
authors.lastname: Karger
authors.forename: Thomas C
authors.initials: TC
authors.lastname: Mettenleiter
mesh_terms: D000818:Animals; D036022:Capsid Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D011558:Herpesvirus 1, Suid / Q000235:genetics / Q000378:metabolism*; D013058:Mass Spectrometry; D010455:Peptides / Q000737:chemistry; D011557:Pseudorabies / Q000235:genetics / Q000378:metabolism*; D014759:Viral Envelope Proteins / Q000737:chemistry / Q000378:metabolism; D014764:Viral Proteins / Q000737:chemistry / Q000378:metabolism*; D014771:Virion / Q000378:metabolism*; D019065:Virus Assembly
chemical_list: D036022:Capsid Proteins; D010455:Peptides; C078030:UL21 protein, Pseudorabies virus; D014759:Viral Envelope Proteins; D014764:Viral Proteins