| Novel chiroptical analysis of hemoglobin by surface enhanced resonance Raman optical activity spectroscopy. | |
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MedLine Citation:
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PMID: 20049977 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The metalloprotein hemoglobin (Hb) was studied using surface enhanced resonance Raman spectroscopy (SERRS) and surface enhanced resonance Raman optical activity (SERROA). The SERROA results are analyzed and compared with the SERRS, and the later to the resonance Raman (RRS) performed on Hb. The SERRS measurements careful optimization, with respect to the concentration and volume ratio of the analyte to colloids, enables for the first time SERROA of this molecule. We observed that the most intense SERROA signals were attributed the nu(4), nu(20), and nu(21) vibrations, which are sensitive to the redox state of the heme's iron ion, and to the presence of its sixth site, bound to exogenous ligand; O(2), NO or CO. However, in this study, the SERROA signals corresponding to these vibrations appear more sensitive to the Hb oxygen-binding properties than they appear in the SERRS or RRS. Moreover, the SERROA signal of Hb has successfully been monitored as a function of time, and was observed to be stable for 4-5 min. To our knowledge, the SERROA results of Hb, and its comparison to SERRS and RRS, are here reported for the first time. |
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Authors:
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Nadezda A Brazhe; Alexey R Brazhe; Olga V Sosnovtseva; Salim Abdali |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Chirality Volume: 21 Suppl 1 ISSN: 1520-636X ISO Abbreviation: Chirality Publication Date: 2009 |
Date Detail:
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Created Date: 2010-02-08 Completed Date: 2010-05-31 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8914261 Medline TA: Chirality Country: United States |
Other Details:
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Languages: eng Pagination: E307-12 Citation Subset: IM |
Copyright Information:
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(c) 2010 Wiley-Liss, Inc. |
Affiliation:
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Department of Biophysics, Biological Faculty, Moscow State University, Moscow, Russia. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Colloids Heme / chemistry Hemoglobins / analysis*, chemistry Male Optical Rotation Oxidation-Reduction Rats Rats, Wistar Research / methods* Spectrum Analysis, Raman / methods* Vibration |
| Chemical | |
Reg. No./Substance:
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0/Colloids; 0/Hemoglobins; 14875-96-8/Heme |
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