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The CopA copper ATPase of Enterococcus hirae belongs to the family of heavy metal pumping CPx-type ATPases and shares 43% sequence similarity with the human Menkes and Wilson copper ATPases. Due to a lack of suitable protein crystals, only partial three-dimensional structures have so far been obtained for this family of ion pumps. We present a structural model of CopA derived by combining topological...
Wilson disease is a disorder of copper metabolism, due to inherited mutations in the Wilson copper ATPase gene ATP7B. To purify and study the function of the ATPase, the enzyme was truncated by five of the six metal binding domains and endowed with an N-terminal histidine-tag for affinity purification. This construct, Δ1–5WNDP, was able to functionally complement a yeast strain defective in its native...
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