Dynamic metal-thiolate cluster structure of metallothioneins.
نویسندگان
چکیده
منابع مشابه
Dynamic metal-thiolate cluster structure of metallothioneins.
113Cd-NMR studies have established that vertebrate and invertebrate metallothioneins contain two unique metal-thiolate clusters. However, it proved to be difficult to account theoretically for all features of the 113Cd-NMR spectra. In a reinvestigation of these features using chromatographically homogeneous 113Cd7-metallothionein we have identified a total of seven 113Cd resonances and have con...
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Metallothionein are small, cysteine-rich, metal-binding proteins that are found ubiquitously in nature. Most metallothioneins bind multiple metals in two well-defined metal-thiolate clusters. This perspective discusses the use of optical spectroscopy to study the metalation of metallothioneins and the emergence of electrospray ionization mass spectrometry as a means of studying the mechanism of...
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Metallothioneins are small cysteine-rich proteins coordinating various transition metal ions preferably with the electron configuration d(10). They are ubiquitously present in all phyla, and next to phytochelatins they represent a successful molecular concept for high-capacity metal ion binding. Recent studies showed the incorporation of sulfide ions into the metal-thiolate cluster of metalloth...
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Metal-thiolate active sites play major roles in bioinorganic chemistry. The M--S(thiolate) bonds can be very covalent, and involve different orbital interactions. Spectroscopic features of these active sites (intense, low-energy charge transfer transitions) reflect the high covalency of the M--S(thiolate) bonds. The energy of the metal-thiolate bond is fairly insensitive to its ionic/covalent a...
متن کاملContinuous modulation of electronic structure of stable thiolate-protected Au25 cluster by Ag doping.
The effect of Ag doping on the electronic structure of a stable thiolate-protected Au(25) cluster (Au(25)(SR)(18)) was studied by measuring the optical spectra of Au(25-n)Ag(n)(SC(12)H(25))(18) (n = 0-11) and the results reveal that the electronic structure of Au(25)(SC(12)H(25))(18) is sensitive to Ag doping and is continuously modulated by incorporation of Ag atoms.
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ژورنال
عنوان ژورنال: Environmental Health Perspectives
سال: 1986
ISSN: 0091-6765,1552-9924
DOI: 10.1289/ehp.65-1474703