Abstract
The external segment of the T4 (CD4) glycoprotein functions as the T-cell surface receptor for human immunodeficiency virus by binding the major viral coat protein (gp120) with relatively high affinity. To more precisely define the region of T4 involved in gp120 interaction, we used purified, soluble forms of T4 anchor-minus polypeptides (produced in a baculovirus system) in conjunction with proteolytic fragmentation, microsequencing, and a specific T4-gp120 binding assay. The results indicate that the NH2-terminal region of T4 including the immunoglobulin variable-region-like domain is required for gp120 interaction. In contrast, the COOH-terminal half of the molecule, containing the two potential N-linked glycosylation sites, is not necessary. Furthermore, reduction of intrachain disulfide bonds in the T4 molecular abrogates gp120 binding, thereby strongly implying that the binding site for gp120 is dependent on the stabilized domain structure of the active binding region.
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- Biddison W. E., Rao P. E., Talle M. A., Goldstein G., Shaw S. Possible involvement of the OKT4 molecule in T cell recognition of class II HLA antigens. Evidence from studies of cytotoxic T lymphocytes specific for SB antigens. J Exp Med. 1982 Oct 1;156(4):1065–1076. doi: 10.1084/jem.156.4.1065. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Clark S. J., Jefferies W. A., Barclay A. N., Gagnon J., Williams A. F. Peptide and nucleotide sequences of rat CD4 (W3/25) antigen: evidence for derivation from a structure with four immunoglobulin-related domains. Proc Natl Acad Sci U S A. 1987 Mar;84(6):1649–1653. doi: 10.1073/pnas.84.6.1649. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Classon B. J., Tsagaratos J., McKenzie I. F., Walker I. D. Partial primary structure of the T4 antigens of mouse and sheep: assignment of intrachain disulfide bonds. Proc Natl Acad Sci U S A. 1986 Jun;83(12):4499–4503. doi: 10.1073/pnas.83.12.4499. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 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]
- 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]
- Epp O., Lattman E. E., Schiffer M., Huber R., Palm W. The molecular structure of a dimer composed of the variable portions of the Bence-Jones protein REI refined at 2.0-A resolution. Biochemistry. 1975 Nov 4;14(22):4943–4952. doi: 10.1021/bi00693a025. [DOI] [PubMed] [Google Scholar]
- 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]
- Gallo R. C. The AIDS virus. Sci Am. 1987 Jan;256(1):46–56. [PubMed] [Google Scholar]
- Gay D., Maddon P., Sekaly R., Talle M. A., Godfrey M., Long E., Goldstein G., Chess L., Axel R., Kappler J. Functional interaction between human T-cell protein CD4 and the major histocompatibility complex HLA-DR antigen. Nature. 1987 Aug 13;328(6131):626–629. doi: 10.1038/328626a0. [DOI] [PubMed] [Google Scholar]
- 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]
- Klatzmann D., Barré-Sinoussi F., Nugeyre M. T., Danquet C., Vilmer E., Griscelli C., Brun-Veziret F., Rouzioux C., Gluckman J. C., Chermann J. C. Selective tropism of lymphadenopathy associated virus (LAV) for helper-inducer T lymphocytes. Science. 1984 Jul 6;225(4657):59–63. doi: 10.1126/science.6328660. [DOI] [PubMed] [Google Scholar]
- Lane H. C., Fauci A. S. Immunologic abnormalities in the acquired immunodeficiency syndrome. Annu Rev Immunol. 1985;3:477–500. doi: 10.1146/annurev.iy.03.040185.002401. [DOI] [PubMed] [Google Scholar]
- Lasky L. A., Nakamura G., Smith D. H., Fennie C., Shimasaki C., Patzer E., Berman P., Gregory T., Capon D. J. Delineation of a region of the human immunodeficiency virus type 1 gp120 glycoprotein critical for interaction with the CD4 receptor. Cell. 1987 Sep 11;50(6):975–985. doi: 10.1016/0092-8674(87)90524-1. [DOI] [PubMed] [Google Scholar]
- Littman D. R., Gettner S. N. Unusual intron in the immunoglobulin domain of the newly isolated murine CD4 (L3T4) gene. 1987 Jan 29-Feb 4Nature. 325(6103):453–455. doi: 10.1038/325453a0. [DOI] [PubMed] [Google Scholar]
- 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]
- Maddon P. J., Littman D. R., Godfrey M., Maddon D. E., Chess L., Axel R. The isolation and nucleotide sequence of a cDNA encoding the T cell surface protein T4: a new member of the immunoglobulin gene family. Cell. 1985 Aug;42(1):93–104. doi: 10.1016/s0092-8674(85)80105-7. [DOI] [PubMed] [Google Scholar]
- Maddon P. J., Molineaux S. M., Maddon D. E., Zimmerman K. A., Godfrey M., Alt F. W., Chess L., Axel R. Structure and expression of the human and mouse T4 genes. Proc Natl Acad Sci U S A. 1987 Dec;84(24):9155–9159. doi: 10.1073/pnas.84.24.9155. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Matsudaira P. Sequence from picomole quantities of proteins electroblotted onto polyvinylidene difluoride membranes. J Biol Chem. 1987 Jul 25;262(21):10035–10038. [PubMed] [Google Scholar]
- Matthews T. J., Weinhold K. J., Lyerly H. K., Langlois A. J., Wigzell H., Bolognesi D. P. Interaction between the human T-cell lymphotropic virus type IIIB envelope glycoprotein gp120 and the surface antigen CD4: role of carbohydrate in binding and cell fusion. Proc Natl Acad Sci U S A. 1987 Aug;84(15):5424–5428. doi: 10.1073/pnas.84.15.5424. [DOI] [PMC free article] [PubMed] [Google Scholar]
- 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]
- McDougal J. S., Nicholson J. K., Cross G. D., Cort S. P., Kennedy M. S., Mawle A. C. Binding of the human retrovirus HTLV-III/LAV/ARV/HIV to the CD4 (T4) molecule: conformation dependence, epitope mapping, antibody inhibition, and potential for idiotypic mimicry. J Immunol. 1986 Nov 1;137(9):2937–2944. [PubMed] [Google Scholar]
- Meuer S. C., Schlossman S. F., Reinherz E. L. Clonal analysis of human cytotoxic T lymphocytes: T4+ and T8+ effector T cells recognize products of different major histocompatibility complex regions. Proc Natl Acad Sci U S A. 1982 Jul;79(14):4395–4399. doi: 10.1073/pnas.79.14.4395. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Robey W. G., Arthur L. O., Matthews T. J., Langlois A., Copeland T. D., Lerche N. W., Oroszlan S., Bolognesi D. P., Gilden R. V., Fischinger P. J. Prospect for prevention of human immunodeficiency virus infection: purified 120-kDa envelope glycoprotein induces neutralizing antibody. Proc Natl Acad Sci U S A. 1986 Sep;83(18):7023–7027. doi: 10.1073/pnas.83.18.7023. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Sattentau Q. J., Dalgleish A. G., Weiss R. A., Beverley P. C. Epitopes of the CD4 antigen and HIV infection. Science. 1986 Nov 28;234(4780):1120–1123. doi: 10.1126/science.2430333. [DOI] [PubMed] [Google Scholar]
- 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]
- Sodroski J., Goh W. C., Rosen C., Campbell K., Haseltine W. A. Role of the HTLV-III/LAV envelope in syncytium formation and cytopathicity. 1986 Jul 31-Aug 6Nature. 322(6078):470–474. doi: 10.1038/322470a0. [DOI] [PubMed] [Google Scholar]
- 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]