Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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    Solubilization of V-ATPase transmembrane peptides by amphipol A8-35
    Duarte, A.M. ; Wolfs, C.J.A.M. ; Koehorst, R.B.M. ; Popot, J.L. ; Hemminga, M.A. - \ 2008
    Journal of Peptide Science 14 (2008)4. - ISSN 1075-2617 - p. 389 - 393.
    proton translocation channel - integral membrane-proteins - amphipathic polymers - conformation - mimicking - segment - a8-35
    Two transmembrane peptides encompassing the seventh transmembrane section of subunit a from V-ATPase from Saccharomyces cerevisiae were studied as complexes with APols A8-35 by CD and fluorescence spectroscopy, with the goal to use APols to provide a membrane-mimicking environment for the peptides. CD spectroscopy was used to obtain the overall secondary structure of the peptides, whereas fluorescence spectroscopy provided information about the local environment of their tryptophan residues. The fluorescence results indicate that both peptides are trapped by APols and the CD results that they adopt a beta-sheet conformation. This result is in contrast with previous work that showed that the same peptides are alpha-helical in SDS micelles and organic solvents. These observations are discussed in the context of APol physical-chemical properties and transmembrane peptide structural propensity.
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