Identification of viral genes essential for replication of murine γ-herpesvirus 68 using signature-tagged mutagenesis

Moon Jung Song, Seungmin Hwang, Wendy H. Wong, Ting Ting Wu, Sangmi Lee, Hsiang I. Liao, Ren Sun

Research output: Contribution to journalArticle

107 Citations (Scopus)

Abstract

γ-Herpesviruses, Epstein-Barr virus, and Kaposi's sarcoma-associated herpesvirus are important human pathogens, because they are involved in tumor development. Murine γ-herpesvirus-68 (MHV-68 or γHV-68) has emerged as a small animal model system for the study of γ-herpesvirus pathogenesis and host-virus interactions. To identify the genes required for viral replication in vitro and in vivo, we generated 1,152 mutants using signature-tagged transposon mutagenesis on an infectious bacterial artificial chromosome of MHV-68. Almost every ORF was mutated by random insertion. For each ORF, a mutant with an insertion proximal to the N terminus of each ORF was examined for the ability to grow in fibroblasts. Our results indicate that 41 genes are essential for in vitro growth, whereas 26 are nonessential and 6 attenuated. Replication-competent mutants were pooled to infect mice, which led to the discovery of ORF 54 being important for MHV-68 to replicate in the lung. This genetic analysis of a tumor-associated herpesvirus at the whole genome level validates signature-tagged transposon mutagenesis screening as an effective genetic system to identify important virulent genes in vivo and define interactions with the host immune system.

Original languageEnglish
Pages (from-to)3805-3810
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume102
Issue number10
DOIs
Publication statusPublished - 2005 Mar 8
Externally publishedYes

Fingerprint

Rhadinovirus
Viral Genes
Mutagenesis
Open Reading Frames
Herpesviridae
Bacterial Artificial Chromosomes
Human Herpesvirus 8
Essential Genes
Human Herpesvirus 4
Immune System
Neoplasms
Animal Models
Fibroblasts
Genome
Viruses
Lung
Growth
Genes

Keywords

  • Bacterial artificial chromosome
  • Deoxyuridine-triphosphatase
  • Functional mapping
  • Herpesvirus
  • Transposition

ASJC Scopus subject areas

  • Genetics
  • General

Cite this

Identification of viral genes essential for replication of murine γ-herpesvirus 68 using signature-tagged mutagenesis. / Song, Moon Jung; Hwang, Seungmin; Wong, Wendy H.; Wu, Ting Ting; Lee, Sangmi; Liao, Hsiang I.; Sun, Ren.

In: Proceedings of the National Academy of Sciences of the United States of America, Vol. 102, No. 10, 08.03.2005, p. 3805-3810.

Research output: Contribution to journalArticle

Song, Moon Jung ; Hwang, Seungmin ; Wong, Wendy H. ; Wu, Ting Ting ; Lee, Sangmi ; Liao, Hsiang I. ; Sun, Ren. / Identification of viral genes essential for replication of murine γ-herpesvirus 68 using signature-tagged mutagenesis. In: Proceedings of the National Academy of Sciences of the United States of America. 2005 ; Vol. 102, No. 10. pp. 3805-3810.
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