ArticleChemistry (Weinheim an der Bergstrasse, Germany)2013
Probing the coordination environment of the human copper chaperone HAH1: characterization of Hg(II)-bridged homodimeric species in solution.
Article in Chemistry (Weinheim an der Bergstrasse, Germany), 2013. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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Who cites it
7 citing papers in PubMed, 26 citations in OpenAlex.
- AsJournal of the American Chemical Society · 2024Article
- Copper chaperone antioxidant 1: multiple roles and a potential therapeutic target.Journal of molecular medicine (Berlin, Germany) · 2023Review
- An Extremely Stable Interprotein Tetrahedral Hg(Cys)Chemistry (Weinheim an der Bergstrasse, Germany) · 2022Article
- Chemical-Shift Standards forInorganic chemistry · 2022Article
- Mercury(II) Binding to Metallothionein in Mytilus edulis revealed by High Energy-Resolution XANES Spectroscopy.Chemistry (Weinheim an der Bergstrasse, Germany) · 2019Article
- Formation of Hg(II) Tetrathiolate Complexes with Cysteine at Neutral pH.Canadian journal of chemistry · 2016Article
- Metal coordination study at Ag and Cd sites in crown thioether complexes through DFT calculations and hyperfine parameters.Journal of molecular modeling · 2015Article
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Authors and funding
8 authors at 4 institutions in 3 countries.
Funding
Abstract
Although metal ion homeostasis in cells is often mediated through metallochaperones, there are opportunities for toxic metals to be sequestered through the existing transport apparatus. Proper trafficking of Cu(I) in human cells is partially achieved through complexation by HAH1, the human metallochaperone responsible for copper delivery to the Wilson and Menkes ATPase located in the trans-Golgi apparatus. In addition to binding copper, HAH1 strongly complexes Hg(II), with the X-ray structure of this complex previously described. It is important to clarify the solution behavior of these systems and, therefore, the binding of Hg(II) to HAH1 was probed over the pH range 7.5 to 9.4 using (199)Hg NMR, (199m)Hg PAC and UV-visible spectroscopies. The metal-dependent protein association over this pH range was examined using analytical gel-filtration. It can be concluded that at pH 7.5, Hg(II) is bound to a monomeric HAH1 as a two coordinate, linear complex (HgS2), like the Hg(II)-Atx1 X-ray structure (PDB ID: 1CC8). At pH 9.4, Hg(II) promotes HAH1 association, leading to formation of HgS3 and HgS4 complexes, which are in exchange on the μs-ns time scale. Thus, structures that may represent central intermediates in the process of metal ion transfer, as well as their exchange kinetics have been characterized.
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