Membrane Interactions of Apolipoprotein C-III Probed by Tryptophan Fluorescence
نویسندگان
چکیده
منابع مشابه
Conformational state of the SecYEG-bound SecA probed by single tryptophan fluorescence spectroscopy.
The SecYEG complex is a membrane-embedded channel that permits the passage of precursor proteins (preproteins) across the inner membrane of Escherichia coli. SecA is a molecular motor that associates with the SecYEG pore and drives the stepwise translocation of preproteins across the membrane through multiple cycles of ATP binding and hydrolysis. We have investigated the conformational state of...
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Plasmodium falciparum triosephosphate isomerase (PfTIM) contains two tryptophan residues, W11 and W168. One is positioned in the interior of the protein, and the other is located on the active-site loop 6. Two single-tryptophan mutants, W11F and W168F, were constructed to evaluate the contributions of each chromophore to the fluorescence of the wild-type (wt) protein and to probe the utility of...
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The fluorescence of the single tryptophan (Trp69) of cutinase from Fusarium solani pisi, free in aqueous solution and adsorbed onto the surface of poly(methyl methacrylate) (PMMA) latex particles, was studied at pHs of 4.5 and 8.0. The monodisperse PMMA particles (d=106.0+/-0.1 nm) were coated with a quite compact monolayer of cutinase at both pH values. The Trp decay curve of the folded free c...
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Motivated by ongoing efforts to understand the mechanism of membrane protein crystallogenesis and transport in the lipidic cubic phase, the nature of the interaction between tryptophan and the bilayer/aqueous interface of the cubic phase has been investigated. The association was quantified by partitioning measurements that enabled the free energy of interaction to be determined. Temperature-de...
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The calcium-induced conformational changes of the 108-amino acid residue proteins, cod III parvalbumin and oncomodulin, were compared using tryptophan as a sensitive spectroscopic probe. As native oncomodulin is devoid of tryptophan, site-specific mutagenesis was performed to create a mutant protein in which tryptophan was placed in the identical position (residue 102) as the single tryptophan ...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 2011
ISSN: 0006-3495
DOI: 10.1016/j.bpj.2010.12.2973