Conserved structure and domain organization among bacterial Slc26 transporters.

Abstract : The Slc26 proteins are a ubiquitous superfamily of anion transporters conserved from bacteria to humans, among which four have been identified as human disease genes. Our functional knowledge of this protein family has increased but limited structural information is available. These proteins contain a transmembrane (TM) domain and a C-terminal cytoplasmic sulfate transporter and anti-sigma factor (STAS) domain. In a fundamental step towards understanding the structure/function relationships within the family we have used small-angle neutron scattering (SANS) on two distantly related bacterial homologues to show that there is a common, dimeric and structural architecture among Slc26A transporters. Pulsed electron-electron double resonance (PELDOR) spectroscopy supports the dimeric SANS-derived model. Using chimaeric/truncated proteins we have determined the domain organization: the STAS domains project away from the TM core and are essential for protein stability. We use the SANS-generated envelopes to assess a homology model of the TM core.
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Article dans une revue
Biochemical Journal, Portland Press, 2014, 463 (2), pp.297-307
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http://hal.univ-grenoble-alpes.fr/hal-01131159
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Soumis le : vendredi 13 mars 2015 - 09:30:50
Dernière modification le : jeudi 11 janvier 2018 - 06:15:24

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  • HAL Id : hal-01131159, version 1
  • PUBMED : 25031084

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Emma L R Compton, Kimberly Page, Heather E Findlay, Michael Haertlein, Martine Moulin, et al.. Conserved structure and domain organization among bacterial Slc26 transporters.. Biochemical Journal, Portland Press, 2014, 463 (2), pp.297-307. 〈hal-01131159〉

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