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1994-10-25
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Document 3297
DOCN M94A3297
TI Retroviral integration into highly repetitive Alu and HERV-K elements in
13.1 KB human CD4 locus.
DT 9412
AU Blinov VM; Zverev VV; Nedospasov SA; Institute for Viral Preparations,
Moscow, Russia.
SO Int Conf AIDS. 1994 Aug 7-12;10(1):108 (abstract no. PA0050). Unique
Identifier : AIDSLINE ICA10/94369278
AB Sequence of the human genomic fragment encompassing 13.1 kilobases from
the human CD4 locus have been determined. This fragment included three
exons and two untrons of CD4 gene. The genomic sequences were analyzed
for the presence of repetitive elements and their classification is
described. Within the sequenced fragment of CD4 gene we revealed
fourteen Alu repeats, eight of the repeats being clastered in two loci.
All Alu repeats are located in introns; eleven repeats have the
counter-transcription orientation (antisense Alu elements) while three
repeats are oriented in the direction of transcription. We localized the
retrovirus-like element HERV-K in the first intron of the human CD4 gene
in opposite orientation; hence all canonical regulatory elements of
HERV-K are encoded on the minus strand relative to CD4 mRNA. The
peculiar feature of HERV-K element in CD4 locus is the occurrence of Alu
repeat wihin the element. Insertional Alu repeat is oppositely oriented
and flanked by the direct repeats. The possible evolutionary mechanisms
of origination of Alu insertions are discussed.
DE Antigens, CD4/*GENETICS DNA, Antisense/GENETICS Evolution Exons
Human In Vitro Introns *Repetitive Sequences, Nucleic Acid
Retroviridae/*GENETICS RNA, Messenger/GENETICS Virus
Integration/*GENETICS MEETING ABSTRACT
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).