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Journal of Virology, October 1999, p. 8848-8850, Vol. 73, No. 10
0022-538X/99/$04.00+0
Evidence that the Genomic RNA of Hepatitis E Virus
Is Capped
Yamina
Kabrane-Lazizi,*
Xiang-Jin
Meng,
Robert H.
Purcell, and
Suzanne U.
Emerson
Hepatitis Viruses and Molecular Hepatitis
Sections, Laboratory of Infectious Diseases, National Institute of
Allergy and Infectious Diseases, National Institutes of Health,
Bethesda, Maryland 20892
Received 11 February 1999/Accepted 14 June 1999
Hepatitis E virus (HEV) is an unclassified virus with a
positive-sense RNA genome and an undefined replication strategy. In order to determine whether the HEV genome is capped or not, we developed a reverse transcription-PCR assay that is based on the ability of a monoclonal antibody to recognize 7-methylguanosine (m7G). Antibody to m7G bound RNA extracted from
virions of two different HEV genotypes. The cap analog competitively
inhibited the binding of virion RNAs, demonstrating that HEV has a
capped RNA genome.
*
Corresponding author. Mailing address: Hepatitis
Viruses and Molecular Hepatitis Sections, Laboratory of Infectious
Diseases, National Institute of Allergy and Infectious Diseases,
National Institutes of Health, Bethesda, MD 20892. Phone: (301)
496-6227. Fax: (301) 402-0524. E-mail:
ykabrane{at}atlas.niaid.nih.gov.

Present address: Department of Biomedical Sciences and
Pathobiology, Center for Molecular Medicine and Infectious Diseases,
Virginia Polytechnic Institute and State University, Blacksburg,
VA
24061.
Journal of Virology, October 1999, p. 8848-8850, Vol. 73, No. 10
0022-538X/99/$04.00+0
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