Biospecific labeling with undecagold: visualization of the biotin-binding site on avidin

The biotin-binding site on avidin has been labeled with biotin conjugated to undecagold, an organometallic cluster compound containing 11 gold atoms in a core angestroms in diameter. Examination of unstained specimens by scanning transmission electron microscopy reveals the labeled sites directly, w...

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Veröffentlicht in:Science (American Association for the Advancement of Science) Jg. 218; H. 4569; S. 290
Hauptverfasser: Safer, D, Hainfeld, J, Wall, J S, Reardon, J E
Format: Journal Article
Sprache:Englisch
Veröffentlicht: United States 15.10.1982
Schlagworte:
Avidin - metabolism
Binding Sites
Biotin - metabolism
Gold - metabolism
Organogold Compounds
Organometallic Compounds - metabolism
Ovalbumin - analogs & derivatives
ISSN:0036-8075
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Zusammenfassung:The biotin-binding site on avidin has been labeled with biotin conjugated to undecagold, an organometallic cluster compound containing 11 gold atoms in a core angestroms in diameter. Examination of unstained specimens by scanning transmission electron microscopy reveals the labeled sites directly, without computational averaging or filtering of the images. This approach should be widely applicable for determining the locations of subunits and functional site in biological macromolecules at a resolution at a resolution in range of 15 angstroms.
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SourceType-Scholarly Journals-1
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ISSN:0036-8075
DOI:10.1126/science.7123234