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Copper and Silver Transport by CopB-ATPase in Membrane Vesicles of Enterococcus hirae
Open accessAbstract
The P-type ATPase, CopB, of Enterococcus hirae is required for the copper resistance displayed by this organism and thus was postulated to be a copper pump. Using 64Cu+ and 110mAg+, we here show ATP-driven copper and silver accumulation catalyzed by CopB in native inside-out membrane vesicles of E. hirae. CopB ATPase exhibited an apparent Km for Cu+ and Ag+ of 1 microM and for ATP of 10 microM. Transport was maximal at pH 6 and had an apparent Vmax of 0.07 nmol.min-1.mg-1 for both copper and silver transport. Vanadate displayed a biphasic effect on transport: maximal inhibition was observed at 40 microM vanadate for copper transport and 60 microM for silver transport, respectively. At higher vanadate concentrations, these inhibitions were reversed. The CopB ATPase of E. hirae is thus a pump for the extrusion of monovalent copper and silver ions, with copper probably being the natural substrate.
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Nucifora, G., Chu, L., Misra, T. K., & Silver, S. (1989) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.86.10.3544 · Cited by 359
Cited by
Bacterial silver resistance: molecular biology and uses and misuses of silver compounds
Silver, S. (2003) · FEMS Microbiology Reviews · doi:10.1016/s0168-6445(03)00047-0 · Cited by 1,312
Biochemical Characterization of the Human Copper Transporter Ctr1
Lee, J., Peña, M. M. O., Nose, Y., & Thiele, D. J. (2002) · Journal of Biological Chemistry · doi:10.1074/jbc.m104728200 · Cited by 608
CPx-type ATPases: a class of P-type ATPases that pump heavy metals
Solioz, M., & Vulpe, C. (1996) · Trends in Biochemical Sciences · doi:10.1016/s0968-0004(96)20016-7 · Cited by 477
Self-citationMolecular basis for resistance to silver cations in Salmonella
Gupta, A., Matsui, K., Lo, J.-F., & Silver, S. (1999) · Nature Medicine · doi:10.1038/5545 · Cited by 473
The zntA gene of Escherichia coli encodes a Zn(II)-translocating P-type ATPase
Rensing, C., Mitra, B., & Rosen, B. P. (1997) · Proceedings of the National Academy of Sciences · doi:10.1073/pnas.94.26.14326 · Cited by 419
Metadata
- Authors
- Solioz, M., & Odermatt, A.
- Venue
- Journal of Biological Chemistry
- Publisher
- Elsevier BV
- Published
- 1995-04
- Volume
- 270
- Issue
- 16
- Pages
- 9217-9221
- ISSN
- 0021-9258 (ISSN-L)
- OpenAlex
- W1999978156
- Cited by
- 288
- References
- 1
- FWCI
- 4.26
- Type
- journal article
- Language
- en
- Open access
- hybrid
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- Solioz, M., & Odermatt, A. (1995). Copper and Silver Transport by CopB-ATPase in Membrane Vesicles of Enterococcus hirae. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.270.16.9217
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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