JC virus nucleotides 376-396 are critical for VP1 capsid protein expression

Laura C. Ellis, Igor J. Koralnik*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

7 Scopus citations


JC virus (JCV) infection of the brain can cause progressive multifocal leukoencephalopathy, JCV granule cell neuronopathy, and JCV encephalopathy (JCVE). JCVCPN, isolated from the brain of a patient with JCVE, is a naturally occurring strain of JCV with a 143-base pair deletion in the agnogene. Cell culture studies of JCVCPN have shown that the loss of these nucleotides in the agnogene results in impaired expression of VP1 and infectious virion production. To better understand the role of this DNA sequence in JCV replication, we generated a series of deletions in the agnogene on the backbone of a virus which has a mutated agnoprotein start codon preventing agnoprotein expression. We found that deletion of nucleotides 376-396 results in decreased levels of viral DNA replication and a lack of VP1 expression. These results indicate that these nucleotides play a crucial role in JCV replication.

Original languageEnglish (US)
Pages (from-to)671-678
Number of pages8
JournalJournal of neurovirology
Issue number6
StatePublished - Dec 1 2015


  • Agnogene
  • Agnoprotein
  • JC virus
  • VP1 expression

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology
  • Cellular and Molecular Neuroscience
  • Virology

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