Comparison of the helix-coil transition of a titrating polypeptide in aqueous solutions and at the air-water interface
(2005) In Biophysical Chemistry 116(1). p.11-21- Abstract
- The transition from a-helix to random coil of the titrating polyamino acid Co-poly-L-(lysine, phenylalanine), (p-(Lys,Phe)), has been investigated as a function of pH and ionic strength in aqueous solution and at the air water interface by means of circular dichroism (CD) spectroscopy and the Langmuir surface film balance technique. The results strongly suggest that the helix-coil transition for peptides at the air-water interface can be determined by using the two-dimensional Flory exponent, v, to express the pH dependent peptide surface conformation. The helix-coil titration curve of p-(Lys,Phe) shifts approximately 2.5 pH units towards lower pH at the air-water interface, as compared with the bulk solution. This finding is of relevance... (More)
- The transition from a-helix to random coil of the titrating polyamino acid Co-poly-L-(lysine, phenylalanine), (p-(Lys,Phe)), has been investigated as a function of pH and ionic strength in aqueous solution and at the air water interface by means of circular dichroism (CD) spectroscopy and the Langmuir surface film balance technique. The results strongly suggest that the helix-coil transition for peptides at the air-water interface can be determined by using the two-dimensional Flory exponent, v, to express the pH dependent peptide surface conformation. The helix-coil titration curve of p-(Lys,Phe) shifts approximately 2.5 pH units towards lower pH at the air-water interface, as compared with the bulk solution. This finding is of relevance for the understanding of conformation and conformational changes of membrane-tran sporting and membrane penetrating peptides as well as for the use of peptides in molecular devices. (c) 2005 Elsevier B.V All rights reserved. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/157602
- author
- Sjögren, Helen LU and Ulvenlund, Stefan LU
- organization
- publishing date
- 2005
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Biophysical Chemistry
- volume
- 116
- issue
- 1
- pages
- 11 - 21
- publisher
- Elsevier
- external identifiers
-
- wos:000229682500002
- scopus:19444374318
- ISSN
- 1873-4200
- DOI
- 10.1016/j.bpc.2005.01.007
- language
- English
- LU publication?
- yes
- id
- 9af2ef57-e88a-4cd4-88ba-316c030cd486 (old id 157602)
- date added to LUP
- 2016-04-01 15:30:48
- date last changed
- 2022-01-28 05:43:35
@article{9af2ef57-e88a-4cd4-88ba-316c030cd486,
abstract = {{The transition from a-helix to random coil of the titrating polyamino acid Co-poly-L-(lysine, phenylalanine), (p-(Lys,Phe)), has been investigated as a function of pH and ionic strength in aqueous solution and at the air water interface by means of circular dichroism (CD) spectroscopy and the Langmuir surface film balance technique. The results strongly suggest that the helix-coil transition for peptides at the air-water interface can be determined by using the two-dimensional Flory exponent, v, to express the pH dependent peptide surface conformation. The helix-coil titration curve of p-(Lys,Phe) shifts approximately 2.5 pH units towards lower pH at the air-water interface, as compared with the bulk solution. This finding is of relevance for the understanding of conformation and conformational changes of membrane-tran sporting and membrane penetrating peptides as well as for the use of peptides in molecular devices. (c) 2005 Elsevier B.V All rights reserved.}},
author = {{Sjögren, Helen and Ulvenlund, Stefan}},
issn = {{1873-4200}},
language = {{eng}},
number = {{1}},
pages = {{11--21}},
publisher = {{Elsevier}},
series = {{Biophysical Chemistry}},
title = {{Comparison of the helix-coil transition of a titrating polypeptide in aqueous solutions and at the air-water interface}},
url = {{http://dx.doi.org/10.1016/j.bpc.2005.01.007}},
doi = {{10.1016/j.bpc.2005.01.007}},
volume = {{116}},
year = {{2005}},
}