Abstract
ABSTRACTThe gp120 envelope glycoprotein of the human immunodeficiency virus type 1 (HIV-1) promotes virus entry by sequentially binding CD4 and chemokine receptors on the target cell. Primary, clinical HIV-1 isolates require interaction with CD4 to allow gp120 to bind the CCR5 chemokine receptor efficiently. We adapted a primary HIV-1 isolate, ADA, to replicate in CD4-negative canine cells expressing human CCR5. The gp120 changes responsible for the adaptation were limited to alteration of glycosylation addition sites in the V2 loop–V1-V2 stem. The gp120 glycoproteins of the adapted viruses bound CCR5 directly, without prior interaction with CD4. Thus, a major function of CD4 binding in the entry of primary HIV-1 isolates can be bypassed by changes in the gp120 V1-V2 elements, which allow the envelope glycoproteins to assume a conformation competent for CCR5 binding.
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Dates
Type | When |
---|---|
Created | 5 years, 7 months ago (Dec. 31, 2019, 1:19 p.m.) |
Deposited | 1 year, 11 months ago (Sept. 24, 2023, 11:08 a.m.) |
Indexed | 4 months, 2 weeks ago (April 8, 2025, 10:44 p.m.) |
Issued | 25 years, 10 months ago (Oct. 1, 1999) |
Published | 25 years, 10 months ago (Oct. 1, 1999) |
Published Print | 25 years, 10 months ago (Oct. 1, 1999) |
@article{Kolchinsky_1999, title={Adaptation of a CCR5-Using, Primary Human Immunodeficiency Virus Type 1 Isolate for CD4-Independent Replication}, volume={73}, ISSN={1098-5514}, url={http://dx.doi.org/10.1128/jvi.73.10.8120-8126.1999}, DOI={10.1128/jvi.73.10.8120-8126.1999}, number={10}, journal={Journal of Virology}, publisher={American Society for Microbiology}, author={Kolchinsky, Peter and Mirzabekov, Tajib and Farzan, Michael and Kiprilov, Enko and Cayabyab, Mark and Mooney, Larissa J. and Choe, Hyeryun and Sodroski, Joseph}, year={1999}, month=oct, pages={8120–8126} }