Research output: Contribution to Journal/Magazine › Journal article › peer-review
Research output: Contribution to Journal/Magazine › Journal article › peer-review
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TY - JOUR
T1 - Application of two-dimensional correlation analysis to Raman optical activity
AU - Ashton, Lorna
AU - Czarnik-Matusewicz, Boguslawa
AU - Blanch, Ewan W.
PY - 2006/11/6
Y1 - 2006/11/6
N2 - Raman optical activity (ROA) is an incisive probe of structural dynamics and its combination with two-dimensional correlation analysis is an attractive method for the investigation of conformational transitions in proteins. In this paper we show that pretreatment of data is essential for the generation of reliable 2D ROA and 2D Raman correlations. Specific experimental parameters and available information of ROA and Raman studies have facilitated the development of four pretreatment processes, baseline subtraction, smoothing, normalization and further baseline correction. The bisignate nature of ROA spectra has a significant effect on the interpretation of synchronous 2D correlation plots when bands at wavenumbers of both positive and negative intensity are compared, while interpretation of asynchronous plots remains unchanged. We introduce a notation format to make interpretation of 2D correlations from bisignate spectra clearer. With appropriate application of 2D correlation analysis to ROA spectra, 2D ROA and 2D Raman/ROA heterocorrelation are potentially valuable tools for the analysis of conformational transitions in polypeptides and proteins. (c) 2006 Elsevier B.V. All rights reserved.
AB - Raman optical activity (ROA) is an incisive probe of structural dynamics and its combination with two-dimensional correlation analysis is an attractive method for the investigation of conformational transitions in proteins. In this paper we show that pretreatment of data is essential for the generation of reliable 2D ROA and 2D Raman correlations. Specific experimental parameters and available information of ROA and Raman studies have facilitated the development of four pretreatment processes, baseline subtraction, smoothing, normalization and further baseline correction. The bisignate nature of ROA spectra has a significant effect on the interpretation of synchronous 2D correlation plots when bands at wavenumbers of both positive and negative intensity are compared, while interpretation of asynchronous plots remains unchanged. We introduce a notation format to make interpretation of 2D correlations from bisignate spectra clearer. With appropriate application of 2D correlation analysis to ROA spectra, 2D ROA and 2D Raman/ROA heterocorrelation are potentially valuable tools for the analysis of conformational transitions in polypeptides and proteins. (c) 2006 Elsevier B.V. All rights reserved.
KW - Raman optical activity
KW - two-dimensional correlation analysis
KW - polylysine
KW - conformational transition
KW - normalization
KW - bisignate
KW - DEPENDENT SPECTRAL VARIATIONS
KW - INFRARED CORRELATION SPECTROSCOPY
KW - IR CORRELATION SPECTROSCOPY
KW - SECONDARY STRUCTURE
KW - CIRCULAR-DICHROISM
KW - DYNAMIC SPECTRA
KW - STATIC MODIFICATION
KW - BETA-LACTOGLOBULIN
KW - FT-IR
KW - NORMALIZATION
U2 - 10.1016/j.molstruc.2006.03.042
DO - 10.1016/j.molstruc.2006.03.042
M3 - Journal article
VL - 799
SP - 61
EP - 71
JO - Journal of Molecular Structure
JF - Journal of Molecular Structure
SN - 0022-2860
IS - 1-3
T2 - 3rd International Symposium on Two-Dimensional Correlation Spectroscopy (2DCOS-3)
Y2 - 12 August 2005 through 14 August 2005
ER -