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M94A3152.TXT
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1994-10-25
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Document 3152
DOCN M94A3152
TI Comparison of human herpesvirus-6 (HHV-6) variant A and B genes.
DT 9412
AU Yamanishi K; Yamamoto T; Isegawa Y; Mukai T; Osaka University, Japan.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):141 (abstract no. PA0182). Unique
Identifier : AIDSLINE ICA10/94369423
AB OBJECTIVE: HHV-6 is now classifird into two variants such as HHV-6A and
HHV-6B. The gene product of putative immediate-early(IE) loci in HHV-6
variant A was reported to transactivate human immunodeficiency virus
(HIV). Here we report the comparison of sequences in strain HST, variant
B isolated from a Japanese patient with roseola infantum with those of
HHV-6A. METHODS: The virus used in this study was the HST strain and a
Pst I library was constructed using plasmid pUC19 and genomic DNA. Both
strands of DNA were sequenced by the dideoxynucleotide chain termination
method and the sequence of this virus was compared with those of variant
A which was already published(Martin et al., 1991). RESULTS AND
DISCUSSION: Approximately 70% of total DNA in HHV-6B was sequened,
including regions of IE loci. A computer search of one of the IE loci
uncovered a similarity to the IE locus of HHV-6 strain U1102 (J Virol,
1993). Both sequences were highly conserved except occasional base
changes, but U1102 had deletions of 108 and 228 base pairs within the
ORF. Furthermore, the HST ORF was 65 codons shorter than the ORF of
U1102 at the 3' end. The HST and U1102 ORFs shared approximately 85% DNA
homology and 70% amino acid homology. Although it was reported that the
product of this region in HHV-6A transactivated LTR of HIV, no or less
activity was found in HHV-6B. The comparison of DNA sequences in both
variants and the transactivation activity to HIV in other regions will
be discussed.
DE Amino Acid Sequence Base Composition Base Sequence Comparative Study
Conserved Sequence DNA, Viral/*GENETICS/ISOLATION & PURIF *Genes,
Immediate-Early Herpesvirus 6, Human/*GENETICS HIV/*GENETICS *HIV
Long Terminal Repeat Open Reading Frames Sequence Deletion Sequence
Homology, Amino Acid Sequence Homology, Nucleic Acid Software
Trans-Activation (Genetics) *Variation (Genetics) MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).