3k7r
From Proteopedia
Crystal structure of [TM][CuAtx1]3
Structural highlights
FunctionATX1_YEAST Shuttles copper to the transport ATPase CCC2. Protects against oxygen toxicity. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedTetrathiomolybdate (TM) is an orally active agent for treatment of disorders of copper metabolism. Here we describe how TM inhibits proteins that regulate copper physiology. Crystallographic results reveal that the surprising stability of the drug complex with the metallochaperone Atx1 arises from formation of a sulfur-bridged copper-molybdenum cluster reminiscent of those found in molybdenum and iron sulfur proteins. Spectroscopic studies indicate that this cluster is stable in solution and corresponds to physiological clusters isolated from TM-treated Wilson's disease animal models. Finally, mechanistic studies show that the drug-metallochaperone inhibits metal transfer functions between copper-trafficking proteins. The results are consistent with a model wherein TM can directly and reversibly down-regulate copper delivery to secreted metalloenzymes and suggest that proteins involved in metal regulation might be fruitful drug targets. Tetrathiomolybdate inhibits copper trafficking proteins through metal cluster formation.,Alvarez HM, Xue Y, Robinson CD, Canalizo-Hernandez MA, Marvin RG, Kelly RA, Mondragon A, Penner-Hahn JE, O'Halloran TV Science. 2010 Jan 15;327(5963):331-4. Epub 2009 Nov 26. PMID:19965379[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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