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Insertion of a bovine SMT3B gene in NS4B and duplication of NS3 in a bovine viral diarrhea virus genome correlate with the cytopathogenicity of the virus.

Abstract：

:Bovine viral diarrhea virus (BVDV) infection in cattle can lead to the development of a fatal syndrome called mucosal disease (MD). The induction of MD requires co-existence of two biotypes of BVDV: cytopathic (cp) and non-cytopathic (ncp). Studies have shown that in some cases, cp viruses are generated from ncp viruses by cellular gene insertions, duplications or rearrangements in the viral genome. Cellular ubiquitin gene is the most frequently reported insert in BVDV 1. Here we report the finding of a novel cellular gene insertion (termed cSNCINS) in the NS4B gene accompanied by the duplication of NS3 in a cpBVDV genome. The amino acid sequence of the insert is identical to that of the human SMT3B protein and is 98% similar to that of the human SMT3A protein. Both SMT3B and SMT3A proteins are homologues of the yeast SMT3 protein. The cSNCINS protein is encoded by an open reading frame located on a 1150-bp bovine endometrial cDNA fragment. Our results indicate that the cSNCINS is a bovine homologue of the human SMT3B gene and that insertion of the BSMT3B gene together with duplication of NS3 in the viral genome may account for the cytopathogenicity of this virus.

journal_name

Virus Res

journal_title

Virus research

authors

Qi F,Ridpath JF,Berry ES

doi

10.1016/s0168-1702(98)00073-2

subject

Has Abstract

pub_date

1998-09-01 00:00:00

pages

1-9

issue

1

eissn

0168-1702

issn

1872-7492

pii

S0168-1702(98)00073-2

journal_volume

57

pub_type

杂志文章

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