4.6 Article

Characterization and Purification of a Na+/Ca2+ Exchanger from an Archaebacterium

Journal

JOURNAL OF BIOLOGICAL CHEMISTRY
Volume 287, Issue 11, Pages 8652-8659

Publisher

AMER SOC BIOCHEMISTRY MOLECULAR BIOLOGY INC
DOI: 10.1074/jbc.M111.331280

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Funding

  1. National Institutes of Health [R01 HL49101, R21 HL093278]

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Background: Databases include many putative prokaryotic Na+/Ca2+ exchangers, but none have been functionally expressed. Results: A membrane protein (MaX1) of Methanosarcina acetivorans catalyzes electrogenic countertransport of Na+ and Ca2(+). Conclusion: MaX1 has properties similar to those of mammalian Na+/Ca2+ exchangers. Significance: The characterization and purification of MaX1 should facilitate structure/function studies.

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