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Spectroscopic investigations of HIV-1 trans-activator and related peptides in aqueous solutions

Klostermeier, D. and Bayer, P. and Kraft, M. and Frank, R. W. and Rosch, P.. (1997) Spectroscopic investigations of HIV-1 trans-activator and related peptides in aqueous solutions. Biophysical chemistry, Vol. 63, H. 2-3. pp. 87-96.

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Official URL: http://edoc.unibas.ch/dok/A5259725

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Abstract

The 86 amino acid trans-activator (Tat) protein of human immunodeficiency virus type 1 (HIV-1) is an RNA-binding transcriptional regulator. HIV-1 Tat proteins (wild type and Thr40Lys mutant) and the HIV-1 Tat peptide fragments Tat(32-48) and Tat(32-72) were chemically synthesized. One- and two-dimensional nuclear magnetic resonance spectroscopy experiments were performed to elucidate the structural features of these proteins. In fluorescence quenching studies of the full-length Tat protein (Thr40Lys), Trp11 was found to be only partially protected against solvent accessibility. Circular dichroism melting studies monitored a slight cooperative change in the conformation of the Tat with increasing temperature. Backbone NH protons of amino acids located in the main core element of the protein are partially protected against exchange.
Faculties and Departments:05 Faculty of Science > Departement Biozentrum > Former Organization Units Biozentrum > Biophysical Chemistry (Klostermeier)
UniBasel Contributors:Klostermeier, Dagmar
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Elsevier
ISSN:0301-4622
Note:Publication type according to Uni Basel Research Database: Journal article
Last Modified:22 Mar 2012 14:21
Deposited On:22 Mar 2012 13:23

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