Raman spectroscopic study of the Chromobacterium violaceum pigment violacein using multiwavelength excitation and DFT calculations
Language English Country England, Great Britain Media print-electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
26151435
DOI
10.1016/j.saa.2015.06.051
PII: S1386-1425(15)00766-0
Knihovny.cz E-resources
- Keywords
- Cyanobacteria, DFT calculations, Raman spectroscopy, UV protective pigment,
- MeSH
- Chromobacterium metabolism MeSH
- Indoles analysis metabolism MeSH
- Quantum Theory * MeSH
- Models, Molecular MeSH
- Spectrum Analysis, Raman methods MeSH
- Spectroscopy, Fourier Transform Infrared MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Names of Substances
- Indoles MeSH
- violacein MeSH Browser
Violacein is a bisindole pigment occurring as a biosynthetic product of Chromobacterium violaceum and Janthinobacterium lividum. It has some structural similarities to the cyanobacterial UV-protective pigment scytonemin, which has been the subject of comprehensive spectroscopic and structural studies. A detailed experimental Raman spectroscopic study with visible and near-infrared excitation of violacein produced by C. violaceum has been undertaken and supported using theoretical DFT calculations. Raman spectra with 514 and 785 nm excitation of cultivated cells as well as extracts and Gaussian (B3LYP/6-311++G(d,p)) calculations with proposed molecular vibrational assignments are reported here.
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