| Electron spin resonance studies of the solution structure of vanadyl amino acid complexes and mixed ligand complexes of oxalate. | |
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MedLine Citation:
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PMID: 205278 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Esr and electronic spectra of complexes of the general composition VO(AA)2 and VO(ox)(AA) have been characterized; AA = gly, his, cys, pro, val, met, asp amino acids. Spectra of the formulation VO(ox)(LL) (with LL = imidazole plus monodentate oxalate, histamine plus monodentate oxalate, histidine, cysteine, 4-imidazolepropionic acid, mercaptopropionic acid, ethylenediamine and ethanolamine) have been used to deduce a self-consistent assignment of AL, a ligand donor additivity constant contribution to the observed hyperfine splitting, Aiso. Values of AL are sensitive to inductive effects in the ligand structure. The solution structures and likely coordination geometries of VO(his)2, and VO(cys)22-- are discussed. The role of the imidazole moiety as a sigma donor and sulfhydryl sulfur as a pi acceptor is observed in VO(AA)2 and VO(ox)(AA) complexes. |
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Authors:
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C R Johnson; R E Shepherd |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Bioinorganic chemistry Volume: 8 ISSN: 0006-3061 ISO Abbreviation: Bioinorg Chem Publication Date: 1978 |
Date Detail:
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Created Date: 1978-06-28 Completed Date: 1978-06-28 Revised Date: 2000-12-18 |
Medline Journal Info:
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Nlm Unique ID: 1305411 Medline TA: Bioinorg Chem Country: UNITED STATES |
Other Details:
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Languages: eng Pagination: 115-32 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acids* Electron Spin Resonance Spectroscopy Ligands Molecular Conformation Oxalates* Spectrophotometry Vanadium* |
| Chemical | |
Reg. No./Substance:
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0/Amino Acids; 0/Ligands; 0/Oxalates; 7440-62-2/Vanadium |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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