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Unresolved questions in human copper pump mechanisms
Umeå universitet, Teknisk-naturvetenskapliga fakulteten, Kemiska institutionen.
2015 (engelsk)Inngår i: Quarterly reviews of biophysics (Print), ISSN 0033-5835, E-ISSN 1469-8994, Vol. 48, nr 4, s. 471-478Artikkel, forskningsoversikt (Fagfellevurdert) Published
Abstract [en]

Copper (Cu) is an essential transition metal providing activity to key enzymes in the human body. To regulate the levels and avoid toxicity, cells have developed elaborate systems for loading these enzymes with Cu. Most Cu-dependent enzymes obtain the metal from the membrane-bound Cu pumps ATP7A/B in the Golgi network. ATP7A/B receives Cu from the cytoplasmic Cu chaperone Atox1 that acts as the cytoplasmic shuttle between the cell membrane Cu importer, Ctr1 and ATP7A/B. Biological, genetic and structural efforts have provided a tremendous amount of information for how the proteins in this pathway work. Nonetheless, basic mechanistic-biophysical questions (such as how and where ATP7A/B receives Cu, how ATP7A/B conformational changes and domain-domain interactions facilitate Cu movement through the membrane, and, finally, how target polypeptides are loaded with Cu in the Golgi) remain elusive. In this perspective, unresolved inquiries regarding ATP7A/B mechanism will be highlighted. The answers are important from a fundamental view, since mechanistic aspects may be common to other metal transport systems, and for medical purposes, since many diseases appear related to Cu transport dysregulation.

sted, utgiver, år, opplag, sider
2015. Vol. 48, nr 4, s. 471-478
Emneord [en]
copper transport, copperchaperone, Wilson disease protein, Menke's disease protein, ceruloplasmin, biophysical methods
HSV kategori
Identifikatorer
URN: urn:nbn:se:umu:diva-112265DOI: 10.1017/S0033583515000128ISI: 000364764300012PubMedID: 26537407Scopus ID: 2-s2.0-84949230190OAI: oai:DiVA.org:umu-112265DiVA, id: diva2:877722
Tilgjengelig fra: 2015-12-07 Laget: 2015-12-04 Sist oppdatert: 2023-03-24bibliografisk kontrollert

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