The University of Southampton
University of Southampton Institutional Repository

The molecular biology of human caliciviruses

Clarke, Ian N. and Lambden, Paul R. (2001) The molecular biology of human caliciviruses Gastroenteritis Viruses. Novartis Foundation Symposium, 238, pp. 191-196. (doi:10.1002/0470846534.ch11).

Record type: Article

Abstract

Within the last decade molecular analyses of the genome of Norwalk-like viruses (NLVs) have confirmed that this important group of infectious agents belongs to the Caliciviridae family. NLVs have a positive-sense, single-stranded RNA genome of approximately 7700 nucleotides excluding the polyadenylated tail. The genome encodes three open reading frames: ORF 1 is the largest (approximately 1700 amino acids) and is expressed as a polyprotein precursor that is cleaved by the viral 3C-like protease; ORF 2 encodes the viral capsid (550 amino acids); and ORF 3 encodes a small basic protein of unknown function. Comparative sequencing studies of human caliciviruses have revealed a second distinct group of viruses known as Sapporo-like viruses (SLVs). SLVs also have a single-stranded, positive-sense RNA genome of approximately 7400 nucleotides and the small 3' terminal ORF (NLV-ORF3 equivalent) is retained.
Phylogenetic analyses of NLV and SLV genomic sequences have assigned these viruses to two different genera with each genus comprised of two distinct genogroups. The fundamental difference in genome organization between NLVs and SLVs is that the polyprotein and capsid ORFs are contiguous and fused in SLVs. Progress in understanding the molecular biology of human caliciviruses is hampered by the lack of a cell culture system for virus propagation. Studies on viral replication and virion structure have therefore relied on the expression of recombinant virus proteins in heterologous systems. Norwalk virus capsid expressed in insect cells assembles to form virus-like particles (VLPs). Structural studies have shown that Norwalk virus VLPs are comprised of 90 dimers of the capsid protein.

Full text not available from this repository.

More information

Published date: 2001
Keywords: gastroenteritis, calicivirus, electron microscopy, norwalk-like viruses, orf1, capsid, viral-like particles, sapporo-like viruses, molecular, structure

Identifiers

Local EPrints ID: 26990
URI: http://eprints.soton.ac.uk/id/eprint/26990
ISSN: 1528-2511
PURE UUID: 92748e77-89c6-46ae-8699-20324d25612a
ORCID for Ian N. Clarke: ORCID iD orcid.org/0000-0002-4938-1620

Catalogue record

Date deposited: 26 Apr 2006
Last modified: 17 Jul 2017 16:05

Export record

Altmetrics

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×