Abstract
Human T-cell leukemia virus (HTLV) type I-related endogenous sequences (HRES) have been cloned from a human genomic library. HRES-1/1 is present in DNA of all normal donors examined. By nucleotide sequence analysis, HRES-1/1 contains two potential open reading frames capable of encoding a p25 and a p15. A 684 bp flanking region 5' from the first ATG codon of p25 contains a TATA-box, a poly-adenylation signal, a putative tRNA primer binding site, and inverted repeats at locations which are typical of a retroviral long terminal repeat. Phylogenetic analysis suggests that HRES-1/1 entered the genome in primates, presumably as an exogenous retrovirus. From the deduced amino acid sequence of HRES-1/1 p25, residues 6-36 show a sequence homology of 32% and 39% to gag region segments of HTLV-I and HTLV-II, while residues 104-139 display a sequence homology of 33% and 28% to the gag regions of human immunodeficiency virus type 2 (HIV-2) and feline sarcoma virus (FSV), respectively. This suggests that the original exogenous virus infecting primate may be chimeric in structure. The HRES-1/1 genomic locus is transcriptionally active in lymphoid cells, melanoma cells, and embryonic tissues.
MeSH Terms
Amino Acid Sequence
Animals
Base Sequence
Cloning, Molecular
DNA, Viral/genetics,isolation & purification
Genes, Viral
Human T-lymphotropic virus 1/genetics
Humans
Molecular Sequence Data
Phylogeny
Primates/genetics,microbiology
Retroviridae/genetics,isolation & purification
Sequence Homology, Nucleic Acid
Transcription, Genetic
Authors & Affiliations
7 authors, click to expand affiliations / ORCID
Perl A
Department of Medicine, University of Rochester School of Medicine, NY 14642.
Rosenblatt J D
Chen I S
DiVincenzo J P
Bever R
Poiesz B J
Abraham G N
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