Varicella-zoster virus gene 66 transcription and translation in latently infected human Ganglia.
Latent infection with varicella-zoster virus (VZV) is characterized by restricted virus gene expression and the absence of virus production. Of the approximately 70 predicted VZV genes, only five (genes 4, 21, 29, 62, and 63) have been shown by multiple techniques to be transcribed during latency. IE62, the protein product of VZV gene 62, is the major immediate-early (IE) virus-encoded transactivator of viral gene transcription and plays a pivotal role in transactivating viral genes during lytic infection. The protein kinase (66-pk) encoded by VZV gene 66 phosphorylates IE62, resulting in cytoplasmic accumulation of IE62 that mitigates nuclear IE62-induced gene activation. Analysis of latently infected human trigeminal ganglia for 66-pk expression by reverse transcriptase-dependent nested PCR, including DNA sequence analysis, in situ hybridization, and immunohistochemistry, revealed VZV open reading frame 66 to be a previously unrecognized latently expressed virus gene and suggests that prevention of IE62 import to the nucleus by VZV 66-pk phosphorylation is one possible mechanism by which VZV latency is maintained.
Cohrs
Randall J
RJ
Department of Neurology, University of Colorado Health Sciences Center, Denver, Colorado 80262, USA. randall.cohrs@uchsc.edu
Gilden
Donald H
DH
Kinchington
Paul R
PR
Grinfeld
Esther
E
Kennedy
Peter G E
PG
D001483:Base Sequence; D006562:Herpes Zoster / Q000821:virology; D014645:Herpesvirus 3, Human / Q000235:genetics / Q000502:physiology*; D006801:Humans; D007150:Immunohistochemistry; D017403:In Situ Hybridization; D008969:Molecular Sequence Data; D014176:Protein Biosynthesis; D011494:Protein Kinases / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D020133:Reverse Transcriptase Polymerase Chain Reaction; D017422:Sequence Analysis, DNA; D014158:Transcription, Genetic; D012668:Trigeminal Ganglion / Q000821:virology*; D017735:Virus Latency
D011494:Protein Kinases