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Photochemical synthesis of pink silver and its use for monitoring peptide nitration via surface enhanced Raman spectroscopy (SERS)
M. Sokolová, H. Šestáková, M. Truksa, M. Šafařík, R. Hadravová, P. Bouř, J. Šebestík
Language English Country Austria
Document type Journal Article
Grant support
CZ.02.1.01/0.0/0.0/16_019/0000729
European Regional Development Fund
e-INFRA CZ LM2018140
Ministerstvo Školství, Mládeže a Tělovýchovy
22-04669S
Grantová Agentura České Republiky
NLK
ProQuest Central
from 1997-03-01 to 1 year ago
Medline Complete (EBSCOhost)
from 2010-01-01 to 1 year ago
Health & Medicine (ProQuest)
from 1997-03-01 to 1 year ago
- MeSH
- Nitrogen Dioxide MeSH
- Peptides MeSH
- Proteins MeSH
- Spectrum Analysis, Raman * methods MeSH
- Silver * chemistry MeSH
- Publication type
- Journal Article MeSH
Oxidative stress may cause extended tyrosine posttranslational modifications of peptides and proteins. The 3-nitro-L-tyrosine (Nit), which is typically formed, affects protein behavior during neurodegenerative processes, such as Alzheimer's and Parkinson's diseases. Such metabolic products may be conveniently detected at very low concentrations by surface enhanced Raman spectroscopy (SERS). Previously, we have explored the SERS detection of the Nit NO2 bending vibrational bands in a presence of hydrogen chloride (Niederhafner et al., Amino Acids 53:517-532, 2021, ibid). In this article, we describe performance of a new SERS substrate, "pink silver", synthesized photochemically. It provides SERS even without the HCl induction, and the acid further decreases the detection limit about 9 times. Strong SERS bands were observed in the asymmetric (1550-1475 cm-1) and symmetric (1360-1290 cm-1) NO stretching in the NO2 group. The bending vibration was relatively weak, but appeared stronger when HCl was added. The band assignments were supported by density functional theory modeling.
References provided by Crossref.org
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