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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Determination of the coding capacity of the BamHI DNA fragment B of apathogenic Herpes simplex virus type 1 strain HFEM by DNA nucleotide sequence analysis.

Herpes simplex virus type 1 (HSV-1) strain HFEM acquired an apathogenic phenotype due to a deletion within the DNA sequences of the BamHI DNA fragment B of the viral genome. In order to investigate the coding strategy of this particular region of the genome of HSV-1 strain HFEM the DNA nucleotide sequence of the BamHI DNA fragment B was determined. This analysis revealed that the BamHI DNA fragment B of HSV-1 strain HFEM comprises 6593 bp, corresponding to the nucleotide positions (np) 113322 to 117088 and np 120643 to 123465 of the genome of HSV-1 strain 17. According to these data the deletion of the genome of HSV-1 strain HFEM occurred between the np 117089 and 120642. The promoter region of the UL56 gene of HSV-1 strain HFEM is a part of the deleted DNA sequences. Therefore, this gene of HSV-1 strain HFEM is affected and cannot be expressed. The first 35 amino acid (AA) residues of the deduced amino acid sequence of the UL56 open reading frame (ORF) were found to be identical to the amino acid sequence of the UL56 genes of HSV-1 strains 17 and F. However, due to a deletion at np 3494 of the BamHI DNA fragment B of HSV-1 strain HFEM the amino acid composition of the predicted UL56 gene of HSV-1 strain HFEM is different from HSV-1 strain 17 between amino acid positions 36 and 233. In addition the deduced amino acid sequence of the IRL (inverted repeat of the long segment) copy of the IE110 gene of HSV-1 strain HFEM was found to be about 342 amino acids shorter than the amino acid sequence of IE110 gene of HSV-1 strain 17 (775 AA). This was based on a point mutation which was detected within the DNA sequences of Exon 3 of this copy of IE110 gene of HSV-1 strain HFEM.[1]

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