The HIV-1 gp120 major variable regions modulate cold inactivation.
HIV-1 entry involves the viral envelope glycoproteins (Env gps) and receptors on the target cell. Receptor binding channels the intrinsic high potential energy of Env into the force required to fuse the membranes of virus and target cell. For some HIV-1 strains, prolonged incubation on ice decreases Env potential energy and results in functional inactivation. By characterizing chimeras between two primary clade C HIV-1 strains that differ in sensitivities to cold, soluble CD4, and neutralizing antibodies, we found that these properties were largely determined by discrete elements within the gp120 variable regions V1V2 and V3.
Centre de Recherche du CHUM, Université de Montréal, Montreal, Quebec, Canada.
Halima
H
Medjahed
Beatriz
B
Pacheco
Anik
A
Désormeaux
Joseph
J
Sodroski
Andrés
A
Finzi
D000595:Amino Acid Sequence; D057134:Antibodies, Neutralizing / Q000378:metabolism; D015704:CD4 Antigens / Q000378:metabolism*; D003080:Cold Temperature; D004591:Electrophoresis, Polyacrylamide Gel; D015699:HIV Envelope Protein gp120 / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D015497:HIV-1 / Q000235:genetics*; D008969:Molecular Sequence Data; D010446:Peptide Fragments / Q000378:metabolism; D011487:Protein Conformation; D038301:Virus Inactivation; D053586:Virus Internalization
D057134:Antibodies, Neutralizing; D015704:CD4 Antigens; D015699:HIV Envelope Protein gp120; D010446:Peptide Fragments; C514793:gp120 protein, Human immunodeficiency virus 1