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. 1997 Dec;71(12):9722–9731. doi: 10.1128/jvi.71.12.9722-9731.1997

Analysis of the interaction of the human immunodeficiency virus type 1 gp120 envelope glycoprotein with the gp41 transmembrane glycoprotein.

R Wyatt 1, E Desjardin 1, U Olshevsky 1, C Nixon 1, J Binley 1, V Olshevsky 1, J Sodroski 1
PMCID: PMC230282  PMID: 9371638

Abstract

The human immunodeficiency virus type 1 (HIV-1) gp120 exterior envelope glycoprotein interacts with the viral receptor (CD4) and with the gp41 transmembrane envelope glycoprotein. To study the interaction of the gp120 and gp41 envelope glycoproteins, we compared the abilities of anti-gp120 monoclonal antibodies to bind soluble gp120 and a soluble glycoprotein, sgp140, that contains gp120 and gp41 exterior domains. The occlusion or alteration of a subset of gp120 epitopes on the latter molecule allowed the definition of a gp41 "footprint" on the gp120 antibody competition map. The occlusion of these epitopes on the sgp140 glycoprotein was decreased by the binding of soluble CD4. The gp120 epitopes implicated in the interaction with the gp41 ectodomain were disrupted by deletions of the first (C1) and fifth (C5) conserved gp120 regions. These deletions did not affect the integrity of the discontinuous binding sites for CD4 and neutralizing monoclonal antibodies. Thus, the gp41 interface on the HIV-1 gp120 glycoprotein, which elicits nonneutralizing antibodies, can be removed while retaining immunologically desirable gp120 structures.

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Selected References

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  1. Alkhatib G., Combadiere C., Broder C. C., Feng Y., Kennedy P. E., Murphy P. M., Berger E. A. CC CKR5: a RANTES, MIP-1alpha, MIP-1beta receptor as a fusion cofactor for macrophage-tropic HIV-1. Science. 1996 Jun 28;272(5270):1955–1958. doi: 10.1126/science.272.5270.1955. [DOI] [PubMed] [Google Scholar]
  2. Allan J. S., Coligan J. E., Barin F., McLane M. F., Sodroski J. G., Rosen C. A., Haseltine W. A., Lee T. H., Essex M. Major glycoprotein antigens that induce antibodies in AIDS patients are encoded by HTLV-III. Science. 1985 May 31;228(4703):1091–1094. doi: 10.1126/science.2986290. [DOI] [PubMed] [Google Scholar]
  3. Barré-Sinoussi F., Chermann J. C., Rey F., Nugeyre M. T., Chamaret S., Gruest J., Dauguet C., Axler-Blin C., Vézinet-Brun F., Rouzioux C. Isolation of a T-lymphotropic retrovirus from a patient at risk for acquired immune deficiency syndrome (AIDS). Science. 1983 May 20;220(4599):868–871. doi: 10.1126/science.6189183. [DOI] [PubMed] [Google Scholar]
  4. Berger E. A., Sisler J. R., Earl P. L. Human immunodeficiency virus type 1 envelope glycoprotein molecules containing membrane fusion-impairing mutations in the V3 region efficiently undergo soluble CD4-stimulated gp120 release. J Virol. 1992 Oct;66(10):6208–6212. doi: 10.1128/jvi.66.10.6208-6212.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
  5. Broder C. C., Earl P. L., Long D., Abedon S. T., Moss B., Doms R. W. Antigenic implications of human immunodeficiency virus type 1 envelope quaternary structure: oligomer-specific and -sensitive monoclonal antibodies. Proc Natl Acad Sci U S A. 1994 Nov 22;91(24):11699–11703. doi: 10.1073/pnas.91.24.11699. [DOI] [PMC free article] [PubMed] [Google Scholar]
  6. Bugelski P. J., Ellens H., Hart T. K., Kirsh R. L. Soluble CD4 and dextran sulfate mediate release of gp120 from HIV-1: implications for clinical trials. J Acquir Immune Defic Syndr. 1991;4(9):923–924. [PubMed] [Google Scholar]
  7. Cann A. J., Churcher M. J., Boyd M., O'Brien W., Zhao J. Q., Zack J., Chen I. S. The region of the envelope gene of human immunodeficiency virus type 1 responsible for determination of cell tropism. J Virol. 1992 Jan;66(1):305–309. doi: 10.1128/jvi.66.1.305-309.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
  8. Cao J., Bergeron L., Helseth E., Thali M., Repke H., Sodroski J. Effects of amino acid changes in the extracellular domain of the human immunodeficiency virus type 1 gp41 envelope glycoprotein. J Virol. 1993 May;67(5):2747–2755. doi: 10.1128/jvi.67.5.2747-2755.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
  9. Capon D. J., Chamow S. M., Mordenti J., Marsters S. A., Gregory T., Mitsuya H., Byrn R. A., Lucas C., Wurm F. M., Groopman J. E. Designing CD4 immunoadhesins for AIDS therapy. Nature. 1989 Feb 9;337(6207):525–531. doi: 10.1038/337525a0. [DOI] [PubMed] [Google Scholar]
  10. Cheng-Mayer C., Quiroga M., Tung J. W., Dina D., Levy J. A. Viral determinants of human immunodeficiency virus type 1 T-cell or macrophage tropism, cytopathogenicity, and CD4 antigen modulation. J Virol. 1990 Sep;64(9):4390–4398. doi: 10.1128/jvi.64.9.4390-4398.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
  11. Chesebro B., Nishio J., Perryman S., Cann A., O'Brien W., Chen I. S., Wehrly K. Identification of human immunodeficiency virus envelope gene sequences influencing viral entry into CD4-positive HeLa cells, T-leukemia cells, and macrophages. J Virol. 1991 Nov;65(11):5782–5789. doi: 10.1128/jvi.65.11.5782-5789.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  12. Chesebro B., Wehrly K., Nishio J., Perryman S. Macrophage-tropic human immunodeficiency virus isolates from different patients exhibit unusual V3 envelope sequence homogeneity in comparison with T-cell-tropic isolates: definition of critical amino acids involved in cell tropism. J Virol. 1992 Nov;66(11):6547–6554. doi: 10.1128/jvi.66.11.6547-6554.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
  13. Dalgleish A. G., Beverley P. C., Clapham P. R., Crawford D. H., Greaves M. F., Weiss R. A. The CD4 (T4) antigen is an essential component of the receptor for the AIDS retrovirus. Nature. 1984 Dec 20;312(5996):763–767. doi: 10.1038/312763a0. [DOI] [PubMed] [Google Scholar]
  14. Deen K. C., McDougal J. S., Inacker R., Folena-Wasserman G., Arthos J., Rosenberg J., Maddon P. J., Axel R., Sweet R. W. A soluble form of CD4 (T4) protein inhibits AIDS virus infection. Nature. 1988 Jan 7;331(6151):82–84. doi: 10.1038/331082a0. [DOI] [PubMed] [Google Scholar]
  15. Deng H., Liu R., Ellmeier W., Choe S., Unutmaz D., Burkhart M., Di Marzio P., Marmon S., Sutton R. E., Hill C. M. Identification of a major co-receptor for primary isolates of HIV-1. Nature. 1996 Jun 20;381(6584):661–666. doi: 10.1038/381661a0. [DOI] [PubMed] [Google Scholar]
  16. Doranz B. J., Rucker J., Yi Y., Smyth R. J., Samson M., Peiper S. C., Parmentier M., Collman R. G., Doms R. W. A dual-tropic primary HIV-1 isolate that uses fusin and the beta-chemokine receptors CKR-5, CKR-3, and CKR-2b as fusion cofactors. Cell. 1996 Jun 28;85(7):1149–1158. doi: 10.1016/s0092-8674(00)81314-8. [DOI] [PubMed] [Google Scholar]
  17. Dragic T., Litwin V., Allaway G. P., Martin S. R., Huang Y., Nagashima K. A., Cayanan C., Maddon P. J., Koup R. A., Moore J. P. HIV-1 entry into CD4+ cells is mediated by the chemokine receptor CC-CKR-5. Nature. 1996 Jun 20;381(6584):667–673. doi: 10.1038/381667a0. [DOI] [PubMed] [Google Scholar]
  18. Earl P. L., Doms R. W., Moss B. Oligomeric structure of the human immunodeficiency virus type 1 envelope glycoprotein. Proc Natl Acad Sci U S A. 1990 Jan;87(2):648–652. doi: 10.1073/pnas.87.2.648. [DOI] [PMC free article] [PubMed] [Google Scholar]
  19. Earl P. L., Moss B., Doms R. W. Folding, interaction with GRP78-BiP, assembly, and transport of the human immunodeficiency virus type 1 envelope protein. J Virol. 1991 Apr;65(4):2047–2055. doi: 10.1128/jvi.65.4.2047-2055.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  20. Fauci A. S., Macher A. M., Longo D. L., Lane H. C., Rook A. H., Masur H., Gelmann E. P. NIH conference. Acquired immunodeficiency syndrome: epidemiologic, clinical, immunologic, and therapeutic considerations. Ann Intern Med. 1984 Jan;100(1):92–106. doi: 10.7326/0003-4819-100-1-92. [DOI] [PubMed] [Google Scholar]
  21. Feng Y., Broder C. C., Kennedy P. E., Berger E. A. HIV-1 entry cofactor: functional cDNA cloning of a seven-transmembrane, G protein-coupled receptor. Science. 1996 May 10;272(5263):872–877. doi: 10.1126/science.272.5263.872. [DOI] [PubMed] [Google Scholar]
  22. Fisher A. G., Collalti E., Ratner L., Gallo R. C., Wong-Staal F. A molecular clone of HTLV-III with biological activity. Nature. 1985 Jul 18;316(6025):262–265. doi: 10.1038/316262a0. [DOI] [PubMed] [Google Scholar]
  23. Fisher R. A., Bertonis J. M., Meier W., Johnson V. A., Costopoulos D. S., Liu T., Tizard R., Walker B. D., Hirsch M. S., Schooley R. T. HIV infection is blocked in vitro by recombinant soluble CD4. Nature. 1988 Jan 7;331(6151):76–78. doi: 10.1038/331076a0. [DOI] [PubMed] [Google Scholar]
  24. Fouts T. R., Binley J. M., Trkola A., Robinson J. E., Moore J. P. Neutralization of the human immunodeficiency virus type 1 primary isolate JR-FL by human monoclonal antibodies correlates with antibody binding to the oligomeric form of the envelope glycoprotein complex. J Virol. 1997 Apr;71(4):2779–2785. doi: 10.1128/jvi.71.4.2779-2785.1997. [DOI] [PMC free article] [PubMed] [Google Scholar]
  25. Freed E. O., Myers D. J., Risser R. Characterization of the fusion domain of the human immunodeficiency virus type 1 envelope glycoprotein gp41. Proc Natl Acad Sci U S A. 1990 Jun;87(12):4650–4654. doi: 10.1073/pnas.87.12.4650. [DOI] [PMC free article] [PubMed] [Google Scholar]
  26. Freed E. O., Myers D. J., Risser R. Identification of the principal neutralizing determinant of human immunodeficiency virus type 1 as a fusion domain. J Virol. 1991 Jan;65(1):190–194. doi: 10.1128/jvi.65.1.190-194.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  27. Fu Y. K., Hart T. K., Jonak Z. L., Bugelski P. J. Physicochemical dissociation of CD4-mediated syncytium formation and shedding of human immunodeficiency virus type 1 gp120. J Virol. 1993 Jul;67(7):3818–3825. doi: 10.1128/jvi.67.7.3818-3825.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
  28. Fung M. S., Sun C. R., Gordon W. L., Liou R. S., Chang T. W., Sun W. N., Daar E. S., Ho D. D. Identification and characterization of a neutralization site within the second variable region of human immunodeficiency virus type 1 gp120. J Virol. 1992 Feb;66(2):848–856. doi: 10.1128/jvi.66.2.848-856.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
  29. Gallo R. C., Salahuddin S. Z., Popovic M., Shearer G. M., Kaplan M., Haynes B. F., Palker T. J., Redfield R., Oleske J., Safai B. Frequent detection and isolation of cytopathic retroviruses (HTLV-III) from patients with AIDS and at risk for AIDS. Science. 1984 May 4;224(4648):500–503. doi: 10.1126/science.6200936. [DOI] [PubMed] [Google Scholar]
  30. Hart T. K., Kirsh R., Ellens H., Sweet R. W., Lambert D. M., Petteway S. R., Jr, Leary J., Bugelski P. J. Binding of soluble CD4 proteins to human immunodeficiency virus type 1 and infected cells induces release of envelope glycoprotein gp120. Proc Natl Acad Sci U S A. 1991 Mar 15;88(6):2189–2193. doi: 10.1073/pnas.88.6.2189. [DOI] [PMC free article] [PubMed] [Google Scholar]
  31. Helseth E., Kowalski M., Gabuzda D., Olshevsky U., Haseltine W., Sodroski J. Rapid complementation assays measuring replicative potential of human immunodeficiency virus type 1 envelope glycoprotein mutants. J Virol. 1990 May;64(5):2416–2420. doi: 10.1128/jvi.64.5.2416-2420.1990. [DOI] [PMC free article] [PubMed] [Google Scholar]
  32. Helseth E., Olshevsky U., Furman C., Sodroski J. Human immunodeficiency virus type 1 gp120 envelope glycoprotein regions important for association with the gp41 transmembrane glycoprotein. J Virol. 1991 Apr;65(4):2119–2123. doi: 10.1128/jvi.65.4.2119-2123.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  33. Ho D. D., McKeating J. A., Li X. L., Moudgil T., Daar E. S., Sun N. C., Robinson J. E. Conformational epitope on gp120 important in CD4 binding and human immunodeficiency virus type 1 neutralization identified by a human monoclonal antibody. J Virol. 1991 Jan;65(1):489–493. doi: 10.1128/jvi.65.1.489-493.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  34. Hussey R. E., Richardson N. E., Kowalski M., Brown N. R., Chang H. C., Siliciano R. F., Dorfman T., Walker B., Sodroski J., Reinherz E. L. A soluble CD4 protein selectively inhibits HIV replication and syncytium formation. Nature. 1988 Jan 7;331(6151):78–81. doi: 10.1038/331078a0. [DOI] [PubMed] [Google Scholar]
  35. Hwang S. S., Boyle T. J., Lyerly H. K., Cullen B. R. Identification of the envelope V3 loop as the primary determinant of cell tropism in HIV-1. Science. 1991 Jul 5;253(5015):71–74. doi: 10.1126/science.1905842. [DOI] [PubMed] [Google Scholar]
  36. Ivanoff L. A., Looney D. J., McDanal C., Morris J. F., Wong-Staal F., Langlois A. J., Petteway S. R., Jr, Matthews T. J. Alteration of HIV-1 infectivity and neutralization by a single amino acid replacement in the V3 loop domain. AIDS Res Hum Retroviruses. 1991 Jul;7(7):595–603. doi: 10.1089/aid.1991.7.595. [DOI] [PubMed] [Google Scholar]
  37. Javaherian K., Langlois A. J., McDanal C., Ross K. L., Eckler L. I., Jellis C. L., Profy A. T., Rusche J. R., Bolognesi D. P., Putney S. D. Principal neutralizing domain of the human immunodeficiency virus type 1 envelope protein. Proc Natl Acad Sci U S A. 1989 Sep;86(17):6768–6772. doi: 10.1073/pnas.86.17.6768. [DOI] [PMC free article] [PubMed] [Google Scholar]
  38. Jeffs S. A., McKeating J., Lewis S., Craft H., Biram D., Stephens P. E., Brady R. L. Antigenicity of truncated forms of the human immunodeficiency virus type 1 envelope glycoprotein. J Gen Virol. 1996 Jul;77(Pt 7):1403–1410. doi: 10.1099/0022-1317-77-7-1403. [DOI] [PubMed] [Google Scholar]
  39. Kang C. Y., Hariharan K., Posner M. R., Nara P. Identification of a new neutralizing epitope conformationally affected by the attachment of CD4 to gp120. J Immunol. 1993 Jul 1;151(1):449–457. [PubMed] [Google Scholar]
  40. Kang C. Y., Nara P., Chamat S., Caralli V., Ryskamp T., Haigwood N., Newman R., Köhler H. Evidence for non-V3-specific neutralizing antibodies that interfere with gp120/CD4 binding in human immunodeficiency virus 1-infected humans. Proc Natl Acad Sci U S A. 1991 Jul 15;88(14):6171–6175. doi: 10.1073/pnas.88.14.6171. [DOI] [PMC free article] [PubMed] [Google Scholar]
  41. Klatzmann D., Champagne E., Chamaret S., Gruest J., Guetard D., Hercend T., Gluckman J. C., Montagnier L. T-lymphocyte T4 molecule behaves as the receptor for human retrovirus LAV. Nature. 1984 Dec 20;312(5996):767–768. doi: 10.1038/312767a0. [DOI] [PubMed] [Google Scholar]
  42. Kowalski M., Potz J., Basiripour L., Dorfman T., Goh W. C., Terwilliger E., Dayton A., Rosen C., Haseltine W., Sodroski J. Functional regions of the envelope glycoprotein of human immunodeficiency virus type 1. Science. 1987 Sep 11;237(4820):1351–1355. doi: 10.1126/science.3629244. [DOI] [PubMed] [Google Scholar]
  43. Lapham C. K., Ouyang J., Chandrasekhar B., Nguyen N. Y., Dimitrov D. S., Golding H. Evidence for cell-surface association between fusin and the CD4-gp120 complex in human cell lines. Science. 1996 Oct 25;274(5287):602–605. doi: 10.1126/science.274.5287.602. [DOI] [PubMed] [Google Scholar]
  44. Leonard C. K., Spellman M. W., Riddle L., Harris R. J., Thomas J. N., Gregory T. J. Assignment of intrachain disulfide bonds and characterization of potential glycosylation sites of the type 1 recombinant human immunodeficiency virus envelope glycoprotein (gp120) expressed in Chinese hamster ovary cells. J Biol Chem. 1990 Jun 25;265(18):10373–10382. [PubMed] [Google Scholar]
  45. Lu M., Blacklow S. C., Kim P. S. A trimeric structural domain of the HIV-1 transmembrane glycoprotein. Nat Struct Biol. 1995 Dec;2(12):1075–1082. doi: 10.1038/nsb1295-1075. [DOI] [PubMed] [Google Scholar]
  46. Maddon P. J., Dalgleish A. G., McDougal J. S., Clapham P. R., Weiss R. A., Axel R. The T4 gene encodes the AIDS virus receptor and is expressed in the immune system and the brain. Cell. 1986 Nov 7;47(3):333–348. doi: 10.1016/0092-8674(86)90590-8. [DOI] [PubMed] [Google Scholar]
  47. McDougal J. S., Kennedy M. S., Sligh J. M., Cort S. P., Mawle A., Nicholson J. K. Binding of HTLV-III/LAV to T4+ T cells by a complex of the 110K viral protein and the T4 molecule. Science. 1986 Jan 24;231(4736):382–385. doi: 10.1126/science.3001934. [DOI] [PubMed] [Google Scholar]
  48. McKeating J. A., Shotton C., Cordell J., Graham S., Balfe P., Sullivan N., Charles M., Page M., Bolmstedt A., Olofsson S. Characterization of neutralizing monoclonal antibodies to linear and conformation-dependent epitopes within the first and second variable domains of human immunodeficiency virus type 1 gp120. J Virol. 1993 Aug;67(8):4932–4944. doi: 10.1128/jvi.67.8.4932-4944.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
  49. Moore J. P., Cao Y., Qing L., Sattentau Q. J., Pyati J., Koduri R., Robinson J., Barbas C. F., 3rd, Burton D. R., Ho D. D. Primary isolates of human immunodeficiency virus type 1 are relatively resistant to neutralization by monoclonal antibodies to gp120, and their neutralization is not predicted by studies with monomeric gp120. J Virol. 1995 Jan;69(1):101–109. doi: 10.1128/jvi.69.1.101-109.1995. [DOI] [PMC free article] [PubMed] [Google Scholar]
  50. Moore J. P., Ho D. D. Antibodies to discontinuous or conformationally sensitive epitopes on the gp120 glycoprotein of human immunodeficiency virus type 1 are highly prevalent in sera of infected humans. J Virol. 1993 Feb;67(2):863–875. doi: 10.1128/jvi.67.2.863-875.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
  51. Moore J. P., McKeating J. A., Huang Y. X., Ashkenazi A., Ho D. D. Virions of primary human immunodeficiency virus type 1 isolates resistant to soluble CD4 (sCD4) neutralization differ in sCD4 binding and glycoprotein gp120 retention from sCD4-sensitive isolates. J Virol. 1992 Jan;66(1):235–243. doi: 10.1128/jvi.66.1.235-243.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
  52. Moore J. P., McKeating J. A., Weiss R. A., Sattentau Q. J. Dissociation of gp120 from HIV-1 virions induced by soluble CD4. Science. 1990 Nov 23;250(4984):1139–1142. doi: 10.1126/science.2251501. [DOI] [PubMed] [Google Scholar]
  53. Moore J. P., Sattentau Q. J., Wyatt R., Sodroski J. Probing the structure of the human immunodeficiency virus surface glycoprotein gp120 with a panel of monoclonal antibodies. J Virol. 1994 Jan;68(1):469–484. doi: 10.1128/jvi.68.1.469-484.1994. [DOI] [PMC free article] [PubMed] [Google Scholar]
  54. Moore J. P., Sattentau Q. J., Yoshiyama H., Thali M., Charles M., Sullivan N., Poon S. W., Fung M. S., Traincard F., Pinkus M. Probing the structure of the V2 domain of human immunodeficiency virus type 1 surface glycoprotein gp120 with a panel of eight monoclonal antibodies: human immune response to the V1 and V2 domains. J Virol. 1993 Oct;67(10):6136–6151. doi: 10.1128/jvi.67.10.6136-6151.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
  55. Moore J. P., Sodroski J. Antibody cross-competition analysis of the human immunodeficiency virus type 1 gp120 exterior envelope glycoprotein. J Virol. 1996 Mar;70(3):1863–1872. doi: 10.1128/jvi.70.3.1863-1872.1996. [DOI] [PMC free article] [PubMed] [Google Scholar]
  56. Moore J. P., Willey R. L., Lewis G. K., Robinson J., Sodroski J. Immunological evidence for interactions between the first, second, and fifth conserved domains of the gp120 surface glycoprotein of human immunodeficiency virus type 1. J Virol. 1994 Nov;68(11):6836–6847. doi: 10.1128/jvi.68.11.6836-6847.1994. [DOI] [PMC free article] [PubMed] [Google Scholar]
  57. Olson E. N., Arnold H. H., Rigby P. W., Wold B. J. Know your neighbors: three phenotypes in null mutants of the myogenic bHLH gene MRF4. Cell. 1996 Apr 5;85(1):1–4. doi: 10.1016/s0092-8674(00)81073-9. [DOI] [PubMed] [Google Scholar]
  58. Page K. A., Stearns S. M., Littman D. R. Analysis of mutations in the V3 domain of gp160 that affect fusion and infectivity. J Virol. 1992 Jan;66(1):524–533. doi: 10.1128/jvi.66.1.524-533.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
  59. Pinter A., Honnen W. J., Tilley S. A., Bona C., Zaghouani H., Gorny M. K., Zolla-Pazner S. Oligomeric structure of gp41, the transmembrane protein of human immunodeficiency virus type 1. J Virol. 1989 Jun;63(6):2674–2679. doi: 10.1128/jvi.63.6.2674-2679.1989. [DOI] [PMC free article] [PubMed] [Google Scholar]
  60. Pollard S. R., Rosa M. D., Rosa J. J., Wiley D. C. Truncated variants of gp120 bind CD4 with high affinity and suggest a minimum CD4 binding region. EMBO J. 1992 Feb;11(2):585–591. doi: 10.1002/j.1460-2075.1992.tb05090.x. [DOI] [PMC free article] [PubMed] [Google Scholar]
  61. Posner M. R., Hideshima T., Cannon T., Mukherjee M., Mayer K. H., Byrn R. A. An IgG human monoclonal antibody that reacts with HIV-1/GP120, inhibits virus binding to cells, and neutralizes infection. J Immunol. 1991 Jun 15;146(12):4325–4332. [PubMed] [Google Scholar]
  62. Putney S. D., Matthews T. J., Robey W. G., Lynn D. L., Robert-Guroff M., Mueller W. T., Langlois A. J., Ghrayeb J., Petteway S. R., Jr, Weinhold K. J. HTLV-III/LAV-neutralizing antibodies to an E. coli-produced fragment of the virus envelope. Science. 1986 Dec 12;234(4782):1392–1395. doi: 10.1126/science.2431482. [DOI] [PubMed] [Google Scholar]
  63. Robey W. G., Safai B., Oroszlan S., Arthur L. O., Gonda M. A., Gallo R. C., Fischinger P. J. Characterization of envelope and core structural gene products of HTLV-III with sera from AIDS patients. Science. 1985 May 3;228(4699):593–595. doi: 10.1126/science.2984774. [DOI] [PubMed] [Google Scholar]
  64. Rusche J. R., Javaherian K., McDanal C., Petro J., Lynn D. L., Grimaila R., Langlois A., Gallo R. C., Arthur L. O., Fischinger P. J. Antibodies that inhibit fusion of human immunodeficiency virus-infected cells bind a 24-amino acid sequence of the viral envelope, gp120. Proc Natl Acad Sci U S A. 1988 May;85(9):3198–3202. doi: 10.1073/pnas.85.9.3198. [DOI] [PMC free article] [PubMed] [Google Scholar]
  65. Sattentau Q. J., Moore J. P. Conformational changes induced in the human immunodeficiency virus envelope glycoprotein by soluble CD4 binding. J Exp Med. 1991 Aug 1;174(2):407–415. doi: 10.1084/jem.174.2.407. [DOI] [PMC free article] [PubMed] [Google Scholar]
  66. Sattentau Q. J., Moore J. P. Human immunodeficiency virus type 1 neutralization is determined by epitope exposure on the gp120 oligomer. J Exp Med. 1995 Jul 1;182(1):185–196. doi: 10.1084/jem.182.1.185. [DOI] [PMC free article] [PubMed] [Google Scholar]
  67. Sattentau Q. J., Moore J. P., Vignaux F., Traincard F., Poignard P. Conformational changes induced in the envelope glycoproteins of the human and simian immunodeficiency viruses by soluble receptor binding. J Virol. 1993 Dec;67(12):7383–7393. doi: 10.1128/jvi.67.12.7383-7393.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
  68. Schawaller M., Smith G. E., Skehel J. J., Wiley D. C. Studies with crosslinking reagents on the oligomeric structure of the env glycoprotein of HIV. Virology. 1989 Sep;172(1):367–369. doi: 10.1016/0042-6822(89)90142-6. [DOI] [PubMed] [Google Scholar]
  69. Shioda T., Levy J. A., Cheng-Mayer C. Macrophage and T cell-line tropisms of HIV-1 are determined by specific regions of the envelope gp120 gene. Nature. 1991 Jan 10;349(6305):167–169. doi: 10.1038/349167a0. [DOI] [PubMed] [Google Scholar]
  70. Shotton C., Arnold C., Sattentau Q., Sodroski J., McKeating J. A. Identification and characterization of monoclonal antibodies specific for polymorphic antigenic determinants within the V2 region of the human immunodeficiency virus type 1 envelope glycoprotein. J Virol. 1995 Jan;69(1):222–230. doi: 10.1128/jvi.69.1.222-230.1995. [DOI] [PMC free article] [PubMed] [Google Scholar]
  71. Smith D. H., Byrn R. A., Marsters S. A., Gregory T., Groopman J. E., Capon D. J. Blocking of HIV-1 infectivity by a soluble, secreted form of the CD4 antigen. Science. 1987 Dec 18;238(4834):1704–1707. doi: 10.1126/science.3500514. [DOI] [PubMed] [Google Scholar]
  72. Starcich B. R., Hahn B. H., Shaw G. M., McNeely P. D., Modrow S., Wolf H., Parks E. S., Parks W. P., Josephs S. F., Gallo R. C. Identification and characterization of conserved and variable regions in the envelope gene of HTLV-III/LAV, the retrovirus of AIDS. Cell. 1986 Jun 6;45(5):637–648. doi: 10.1016/0092-8674(86)90778-6. [DOI] [PubMed] [Google Scholar]
  73. Steimer K. S., Scandella C. J., Skiles P. V., Haigwood N. L. Neutralization of divergent HIV-1 isolates by conformation-dependent human antibodies to Gp120. Science. 1991 Oct 4;254(5028):105–108. doi: 10.1126/science.1718036. [DOI] [PubMed] [Google Scholar]
  74. Stein B. S., Gowda S. D., Lifson J. D., Penhallow R. C., Bensch K. G., Engleman E. G. pH-independent HIV entry into CD4-positive T cells via virus envelope fusion to the plasma membrane. Cell. 1987 Jun 5;49(5):659–668. doi: 10.1016/0092-8674(87)90542-3. [DOI] [PubMed] [Google Scholar]
  75. Sullivan N., Sun Y., Li J., Hofmann W., Sodroski J. Replicative function and neutralization sensitivity of envelope glycoproteins from primary and T-cell line-passaged human immunodeficiency virus type 1 isolates. J Virol. 1995 Jul;69(7):4413–4422. doi: 10.1128/jvi.69.7.4413-4422.1995. [DOI] [PMC free article] [PubMed] [Google Scholar]
  76. Sullivan N., Thali M., Furman C., Ho D. D., Sodroski J. Effect of amino acid changes in the V1/V2 region of the human immunodeficiency virus type 1 gp120 glycoprotein on subunit association, syncytium formation, and recognition by a neutralizing antibody. J Virol. 1993 Jun;67(6):3674–3679. doi: 10.1128/jvi.67.6.3674-3679.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
  77. Thali M., Furman C., Helseth E., Repke H., Sodroski J. Lack of correlation between soluble CD4-induced shedding of the human immunodeficiency virus type 1 exterior envelope glycoprotein and subsequent membrane fusion events. J Virol. 1992 Sep;66(9):5516–5524. doi: 10.1128/jvi.66.9.5516-5524.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
  78. Thali M., Furman C., Ho D. D., Robinson J., Tilley S., Pinter A., Sodroski J. Discontinuous, conserved neutralization epitopes overlapping the CD4-binding region of human immunodeficiency virus type 1 gp120 envelope glycoprotein. J Virol. 1992 Sep;66(9):5635–5641. doi: 10.1128/jvi.66.9.5635-5641.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
  79. Thali M., Moore J. P., Furman C., Charles M., Ho D. D., Robinson J., Sodroski J. Characterization of conserved human immunodeficiency virus type 1 gp120 neutralization epitopes exposed upon gp120-CD4 binding. J Virol. 1993 Jul;67(7):3978–3988. doi: 10.1128/jvi.67.7.3978-3988.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]
  80. Thali M., Olshevsky U., Furman C., Gabuzda D., Posner M., Sodroski J. Characterization of a discontinuous human immunodeficiency virus type 1 gp120 epitope recognized by a broadly reactive neutralizing human monoclonal antibody. J Virol. 1991 Nov;65(11):6188–6193. doi: 10.1128/jvi.65.11.6188-6193.1991. [DOI] [PMC free article] [PubMed] [Google Scholar]
  81. Tilley S. A., Honnen W. J., Racho M. E., Hilgartner M., Pinter A. A human monoclonal antibody against the CD4-binding site of HIV1 gp120 exhibits potent, broadly neutralizing activity. Res Virol. 1991 Jul-Aug;142(4):247–259. doi: 10.1016/0923-2516(91)90010-z. [DOI] [PubMed] [Google Scholar]
  82. Traunecker A., Lüke W., Karjalainen K. Soluble CD4 molecules neutralize human immunodeficiency virus type 1. Nature. 1988 Jan 7;331(6151):84–86. doi: 10.1038/331084a0. [DOI] [PubMed] [Google Scholar]
  83. Trkola A., Dragic T., Arthos J., Binley J. M., Olson W. C., Allaway G. P., Cheng-Mayer C., Robinson J., Maddon P. J., Moore J. P. CD4-dependent, antibody-sensitive interactions between HIV-1 and its co-receptor CCR-5. Nature. 1996 Nov 14;384(6605):184–187. doi: 10.1038/384184a0. [DOI] [PubMed] [Google Scholar]
  84. Westervelt P., Gendelman H. E., Ratner L. Identification of a determinant within the human immunodeficiency virus 1 surface envelope glycoprotein critical for productive infection of primary monocytes. Proc Natl Acad Sci U S A. 1991 Apr 15;88(8):3097–3101. doi: 10.1073/pnas.88.8.3097. [DOI] [PMC free article] [PubMed] [Google Scholar]
  85. Westervelt P., Trowbridge D. B., Epstein L. G., Blumberg B. M., Li Y., Hahn B. H., Shaw G. M., Price R. W., Ratner L. Macrophage tropism determinants of human immunodeficiency virus type 1 in vivo. J Virol. 1992 Apr;66(4):2577–2582. doi: 10.1128/jvi.66.4.2577-2582.1992. [DOI] [PMC free article] [PubMed] [Google Scholar]
  86. Wiley D. C., Skehel J. J. The structure and function of the hemagglutinin membrane glycoprotein of influenza virus. Annu Rev Biochem. 1987;56:365–394. doi: 10.1146/annurev.bi.56.070187.002053. [DOI] [PubMed] [Google Scholar]
  87. Wu L., Gerard N. P., Wyatt R., Choe H., Parolin C., Ruffing N., Borsetti A., Cardoso A. A., Desjardin E., Newman W. CD4-induced interaction of primary HIV-1 gp120 glycoproteins with the chemokine receptor CCR-5. Nature. 1996 Nov 14;384(6605):179–183. doi: 10.1038/384179a0. [DOI] [PubMed] [Google Scholar]
  88. Wyatt R., Moore J., Accola M., Desjardin E., Robinson J., Sodroski J. Involvement of the V1/V2 variable loop structure in the exposure of human immunodeficiency virus type 1 gp120 epitopes induced by receptor binding. J Virol. 1995 Sep;69(9):5723–5733. doi: 10.1128/jvi.69.9.5723-5733.1995. [DOI] [PMC free article] [PubMed] [Google Scholar]
  89. Wyatt R., Sullivan N., Thali M., Repke H., Ho D., Robinson J., Posner M., Sodroski J. Functional and immunologic characterization of human immunodeficiency virus type 1 envelope glycoproteins containing deletions of the major variable regions. J Virol. 1993 Aug;67(8):4557–4565. doi: 10.1128/jvi.67.8.4557-4565.1993. [DOI] [PMC free article] [PubMed] [Google Scholar]

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