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Thermostability of the HIV gp41 Wild-Type and Loop Mutations

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The HIV and SIV gp41 ectodomains are extremely stable to chemical and thermal denaturation and the observed stability has been proposed to be an important thermodynamic driving force for gp41-mediated fusion of the viral and target cell membranes. The importance of the disulphide bond and surrounding residues within the HIV gp41 loop have been assayed by DSC studies of wild type and mutant HIV gp41. Based on the thermal transition temperature, the disulphide bond and surrounding residues do not contribute to the thermal stability of gp41 and thus do not contribute to gp41-mediated membrane fusion.

Keywords: AIDS; DSC; HIV; SIV; calorimetry; gp41

Document Type: Research Article


Affiliations: Department of Biochemistry and Molecular Genetics,University of Illinois at Chicago, Chicago, IL 60607, USA.

Publication date: 2006-05-01

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  • Protein & Peptide Letters publishes short papers in all important aspects of protein and peptide research, including structural studies, recombinant expression, function, synthesis, enzymology, immunology, molecular modeling, drug design etc. Manuscripts must have a significant element of novelty, timeliness and urgency that merit rapid publication. Reports of crystallisation, and preliminary structure determinations of biologically important proteins are acceptable. Purely theoretical papers are also acceptable provided they provide new insight into the principles of protein/peptide structure and function.
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