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The saci_2123 gene of the hyperthermoacidophile Sulfolobus acidocaldarius encodes an ATP-binding cassette multidrug transporter

Yang, N. & Driessen, A. J. M., Jan-2015, In : Extremophiles. 19, 1, p. 101-108 8 p.

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  • The saci_2123 gene of the hyperthermoacidophile Sulfolobus acidocaldarius encodes an ATP-binding cassette multidrug transporter

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DOI

Multidrug resistance (MDR) transporters are capable of secreting structurally and functionally unrelated toxic compounds from the cell. Among this group are ATP-binding cassette (ABC) transporters. These membrane proteins are typically arranged as either hetero- or homo-dimers of ABC half-transporters with each subunit consisting of a membrane domain fused at the C-terminus to an ATP-binding domain, or as full transporters in which the two subunits are fused into a single polypeptide. The saci_2123 gene of the thermoacidophilic archaeon Sulfolobus acidocaldarius is the only gene in the genome that encodes an ATP-binding cassette half-transporter, while a homologous gene is present in the genomes of S. solfataricus, S. tokodaii and S islandicus. Saci_2123 shares homology with well-characterized bacterial and mammalian MDR transporters. The saci_2132 gene is up-regulated when cells are exposed to drugs. A deletion mutant of saci_2132 was found to be more vulnerable to a set of toxic compounds, including detergents, antibiotics and uncouplers as compared to the wild-type strain, while the drug resistance could be restored through the plasmid-based expression of saci_2132. These data demonstrate that Saci_2132 is an archaeal ABC-MDR transporter and therefore it was termed Smr1 (Sulfolobus multidrug resistance transporter 1).

Original languageEnglish
Pages (from-to)101-108
Number of pages8
JournalExtremophiles
Volume19
Issue number1
Publication statusPublished - Jan-2015

    Keywords

  • MDR, ABC family, Sulfolobales, Archaea, RESISTANCE, ABC, MECHANISMS, PROTEINS, ARCHAEA, BACTERIA, EFFLUX

ID: 16350222