Document Detail


Part I: surface-enhanced Raman spectroscopy investigation of amino acids and their homodipeptides adsorbed on colloidal silver.
MedLine Citation:
PMID:  15165334     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Surface-enhanced Raman scattering spectra (SERS) were measured for various amino acids: L-methionine (Met), L-cysteine (Cys), Lglycine (Gly), L-leucine (Leu), L-phenylalanine (Phe), and L-proline (Pro) and their homodipeptides (Met-Met, Cys-Cys, Gly-Gly, LeuLeu, Phe-Phe, and Pro-Pro) in silver colloidal solutions. The geometry and orientation of the amino acids or dipeptides on the silver surface, and their specific interaction with the surface, were deducted by detailed spectral analysis of the SERS spectra. This analysis has allowed us to propose the particular surface geometry of amino acids or dipeptides and also implied that C-C bonds were almost parallel to the surface, as evidenced by the absence of marker bands in the skeletal C-C stretching region of the spectra. Additionally, using "time-dependent" SERS measurements we solved an existing controversy regarding the binding specificity of Gly-Gly on the silver surface.
Authors:
Edyta Podstawka; Yukihiro Ozaki; Leonard M Proniewicz
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Publication Detail:
Type:  Comparative Study; Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't; Validation Studies    
Journal Detail:
Title:  Applied spectroscopy     Volume:  58     ISSN:  0003-7028     ISO Abbreviation:  Appl Spectrosc     Publication Date:  2004 May 
Date Detail:
Created Date:  2004-05-28     Completed Date:  2004-07-08     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0372406     Medline TA:  Appl Spectrosc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  570-80     Citation Subset:  IM    
Affiliation:
Laser Raman Laboratory, Regional Laboratory of Physicochemical Analysis and Structural Research, Jagiellonian University, 3 Ingardena Street, 30-060 Krakow, Poland.
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MeSH Terms
Descriptor/Qualifier:
Adsorption
Amino Acids / analysis*,  chemistry*
Binding Sites
Colloids / chemistry*
Dimerization
Dipeptides / analysis*,  chemistry*
Protein Binding
Protein Conformation
Reproducibility of Results
Sensitivity and Specificity
Silver / chemistry*
Spectrum Analysis, Raman / methods*
Surface Plasmon Resonance / methods*
Chemical
Reg. No./Substance:
0/Amino Acids; 0/Colloids; 0/Dipeptides; 7440-22-4/Silver

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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