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J Virol, July 1998, p. 5680-5698, Vol. 72, No. 7
0022-538X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
A Comprehensive Panel of Near-Full-Length Clones
and Reference Sequences for Non-Subtype B Isolates of Human
Immunodeficiency Virus Type 1
Feng
Gao,1
David
L.
Robertson,1,
Catherine D.
Carruthers,1
Sandra G.
Morrison,1
Bixi
Jian,1
Yalu
Chen,1
Françoise
Barré-Sinoussi,2
Marc
Girard,3
Alagarsamy
Srinivasan,4
Alash'le G.
Abimiku,5
George M.
Shaw,1,6
Paul M.
Sharp,7 and
Beatrice H.
Hahn1,*
Department of Medicine and
Microbiology1 and
Howard Hughes Medical
Institute,6 University of Alabama at Birmingham,
Birmingham, Alabama 35294;
Unité de Biologie des
Retrovirus, Institut Pasteur, Paris 75724,2 and
Laboratory of Molecular Virology, Institut Pasteur, Paris
75015,3 France;
Department of
Microbiology and Immunology, Jefferson Cancer Institute, Thomas
Jefferson University, Philadelphia, Pennsylvania
191074;
Institute of Human
Virology, Baltimore, Maryland 212015; and
Division of Genetics, University of Nottingham, Queens
Medical Center, Nottingham, United Kingdom7
Received 9 December 1997/Accepted 30 March 1998
Non-subtype B viruses cause the vast majority of new human
immunodeficiency virus type 1 (HIV-1) infections worldwide and are thus
the major focus of international vaccine efforts. Although their
geographic dissemination is carefully monitored, their immunogenic and
biological properties remain largely unknown, in part because well-characterized virological reference reagents are lacking. In
particular, full-length clones and sequences are rare, since subtype
classification is frequently based on small PCR-derived viral
fragments. There are only five proviral clones available for viruses
other than subtype B, and these represent only 3 of the 10 proposed
(group M) sequence subtypes. This lack of reference sequences also
confounds the identification and analysis of mosaic (recombinant)
genomes, which appear to be arising with increasing frequency in areas
where multiple sequence subtypes cocirculate. To generate a more
representative panel of non-subtype B reference reagents, we have
cloned (by long PCR or lambda phage techniques) and sequenced 10 near-full-length HIV-1 genomes (lacking less than 80 bp of long
terminal repeat sequences) from primary isolates collected at major
epicenters of the global AIDS pandemic. Detailed phylogenetic analyses
identified six that represented nonrecombinant members of HIV-1
subtypes A (92UG037.1), C (92BR025.8), D (84ZR085.1 and 94UG114.1), F
(93BR020.1), and H (90CF056.1), the last two comprising the first
full-length examples of these subtypes. Four others were found to be
complex mosaics of subtypes A and C (92RW009.6), A and G (92NG083.2 and
92NG003.1), and B and F (93BR029.4), again emphasizing the impact of
intersubtype recombination on global HIV-1 diversification. Although a
number of clones had frameshift mutations or translational stop codons
in major open reading frames, all the genomes contained a complete set
of genes and three had intact genomic organizations without
inactivating mutations. Reconstruction of one of these (94UG114.1)
yielded replication-competent virus that grew to high titers in normal
donor peripheral blood mononuclear cell cultures. This panel of
non-subtype B reference genomes should prove valuable for
structure-function studies of genetically diverse viral gene products,
the generation of subtype-specific immunological reagents, and the
production of DNA- and protein-based subunit vaccines directed against
a broader spectrum of viruses.
*
Corresponding author. Mailing address: Department of
Medicine and Microbiology, University of Alabama at Birmingham, 701 S. 19th St., LHRB 613, Birmingham, AL 35294. Phone: (205) 934-0412. Fax:
(205) 934-1580. E-mail: bhahn{at}cordelia.dom.uab.edu.
Present address: Laboratory of Structural and Genetic Information,
CNRS-EP 91, Marseilles, France 13402.
J Virol, July 1998, p. 5680-5698, Vol. 72, No. 7
0022-538X/98/$04.00+0
Copyright © 1998, American Society for Microbiology. All rights reserved.
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