AI Article Synopsis
- Copper needs careful regulation in humans to balance its essential role and potential toxicity, which has been hard to understand.
- Researchers used advanced electron paramagnetic resonance (EPR) techniques to study how Copper (Cu(I)) travels within the body, focusing on its movement from a protein called Atox1 to specific parts of another protein, ATP7B.
- The findings indicate that Atox1 interacts with specific metal binding domains in ATP7B to facilitate copper transfer, suggesting that certain domains act as separate units for effective copper distribution.
Article Abstract
Copper's essentiality and toxicity mean it requires a sophisticated regulation system for its acquisition, cellular distribution and excretion, which until now has remained elusive. Herein, we applied continuous wave (CW) and pulsed electron paramagnetic resonance (EPR) spectroscopy in solution to resolve the copper trafficking mechanism in humans, by considering the route travelled by Cu(I) from the metallochaperone Atox1 to the metal binding domains of ATP7B. Our study revealed that Cu(I) is most likely mediated by the binding of the Atox1 monomer to metal binding domain 1 (MBD1) and MBD4 of ATP7B in the final part of its extraction pathway, while the other MBDs mediate this interaction and participate in copper transfer between the various MBDs to the ATP7B membrane domain. This research also proposes that MBD1-3 and MBD4-6 act as two independent units.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7432781 | PMC |
| http://dx.doi.org/10.3390/ijms21155536 | DOI Listing |
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