Knarr, Gerhard and Modrow, Susanne and Todd, Alicia and Gething, Mary-Jane and Buchner, Johannes (1999) BiP-binding sequences in HIV gp160 - Implications for the binding specificity of BiP. JOURNAL OF BIOLOGICAL CHEMISTRY, 274 (42). pp. 29850-29857. ISSN 0021-9258, 1083-351X
Full text not available from this repository. (Request a copy)Abstract
BiP, a resident endoplasmic reticulum member of the HSP70 family of molecular chaperones, associates transiently with a wide variety of newly synthesized exocytotic proteins. In addition to immunoglobulin heavy and light chains, the first natural substrates identified for BiP, a number of viral polypeptides including the human immunodeficiency virus type 1 envelope glycoprotein gp160 interact with BiP during their passage through the endoplasmic reticulum. We have used a computer algorithm developed to predict BiP-binding sites within protein primary sequences to identify sites within gp160 that might mediate its association with BiP. Analysis of the ability of 22 synthetic heptapeptides corresponding to predicted binding sites to stimulate the ATPase activity of BiP or to compete with an unfolded polypeptide for binding to BiP indicated that about half of them are indeed recognized by the chaperone. All of the confirmed binding sites are localized within conserved regions of gp160, suggesting a conserved role for BiP in the folding of gp160. Information on the characteristics of confirmed BiP-binding peptides gained in this and previous studies has been utilized to improve the predictive power of the BiP Score algorithm and to investigate the differences in peptide binding specificities of HSP70 family members.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | HUMAN-IMMUNODEFICIENCY-VIRUS; IMMUNOGLOBULIN LIGHT-CHAINS; HSP70 MOLECULAR CHAPERONES; ENVELOPE GLYCOPROTEIN; PEPTIDE-BINDING; INFLUENZA HEMAGGLUTININ; ENDOPLASMIC-RETICULUM; MONOCLONAL-ANTIBODIES; CONFORMATIONAL CHANGE; MEMBRANE-FUSION; |
| Subjects: | 500 Science > 570 Life sciences 600 Technology > 610 Medical sciences Medicine |
| Divisions: | Medicine > Lehrstuhl für Medizinische Mikrobiologie und Hygiene Biology, Preclinical Medicine > Institut für Biophysik und physikalische Biochemie |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 13 Dec 2022 14:25 |
| Last Modified: | 13 Dec 2022 14:25 |
| URI: | https://pred.uni-regensburg.de/id/eprint/48923 |
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