Xiong, K and Asher, SA
(2010)
Circular dichroism and UV resonance raman study of the impact of alcohols on the gibbs free energy landscape of an α-helical peptide.
Biochemistry, 49 (15).
3336 - 3342.
ISSN 0006-2960
![[img]](http://d-scholarship-dev.library.pitt.edu/style/images/fileicons/text_plain.png) |
Plain Text (licence)
Available under License : See the attached license file.
Download (1kB)
|
Abstract
We used CD and UV resonance Raman spectroscopy to study the impact of alcohols on the conformational equilibria and relative Gibbs free energy landscapes along the Ramachandran φ-coordinate of a mainly poly-Ala peptide, AP with an AAAAA(AAARA)3A sequence. 2,2,2-Trifluoroethanol (TFE) most stabilizes the α-helix-like conformations, followed by ethanol, methanol, and pure water. The π-bulge conformation is stabilized more than the α-helix, while the 310-helix is destabilized due to the alcohol-increased hydrophobicity. Turns are also stabilized by alcohols. We also found that while TFE induces more α-helices, it favors multiple, shorter helix segments. © 2010 American Chemical Society.
Share
Citation/Export: |
|
Social Networking: |
|
Details
Item Type: |
Article
|
Status: |
Published |
Creators/Authors: |
|
Date: |
20 April 2010 |
Date Type: |
Publication |
Journal or Publication Title: |
Biochemistry |
Volume: |
49 |
Number: |
15 |
Page Range: |
3336 - 3342 |
DOI or Unique Handle: |
10.1021/bi100176a |
Schools and Programs: |
Dietrich School of Arts and Sciences > Chemistry |
Refereed: |
Yes |
ISSN: |
0006-2960 |
MeSH Headings: |
Alcohols--pharmacology; Amino Acid Sequence; Circular Dichroism; Ethanol--pharmacology; Indicators and Reagents; Methanol--pharmacology; Models, Molecular; Peptides--chemistry; Peptides--drug effects; Protein Conformation; Spectrophotometry, Ultraviolet; Spectrum Analysis, Raman; Thermodynamics; Water--chemistry |
Other ID: |
NLM NIHMS188980, NLM PMC2857330 |
PubMed Central ID: |
PMC2857330 |
PubMed ID: |
20225890 |
Date Deposited: |
08 Feb 2013 20:56 |
Last Modified: |
12 Jun 2021 23:55 |
URI: |
http://d-scholarship-dev.library.pitt.edu/id/eprint/17246 |
Metrics
Monthly Views for the past 3 years
Plum Analytics
Altmetric.com
Actions (login required)
![View Item View Item](/style/images/action_view.png) |
View Item |