Balakhnina IA, Brandt NN, Chikishev AY, Mankova AA, Shpachenko IG. Low-frequency vibrational spectroscopy of proteins with different secondary structures.
JOURNAL OF BIOMEDICAL OPTICS 2017;
22:91509. [PMID:
28342298 DOI:
10.1117/1.jbo.22.9.091509]
[Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 03/14/2017] [Indexed: 06/06/2023]
Abstract
Fourier transform infrared (FTIR) and Raman spectra of proteins with significantly different structures are measured in a spectral interval of 50 to 500 ?? cm ? 1 and noticeable spectral differences are revealed. Intensities of several spectral bands correlate with contents of secondary structure elements. FTIR spectra of superhelical proteins exhibit developed spectral features that are absent in the spectra of globular proteins. Significant differences of the Raman spectra of proteins that are not directly related to the difference of the secondary structures can be due to differences of tertiary and/or quaternary structure of protein molecules.
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