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TitleCrystal structure of an Lrs14-like archaeal biofilm regulator from Sulfolobus acidocaldarius.
Journal, issue, pagesActa Crystallogr D Struct Biol, Vol. 74, Issue Pt 11, Page 1105-1114, Year 2018
Publish dateNov 1, 2018
AuthorsMarian S Vogt / Simon L Völpel / Sonja Verena Albers / Lars Oliver Essen / Ankan Banerjee /
PubMed AbstractThe small winged helix-turn-helix (wHTH) proteins of the Lrs14 family are major transcriptional regulators and act as archaeal biofilm regulators (AbfRs) in the crenarchaeote Sulfolobus ...The small winged helix-turn-helix (wHTH) proteins of the Lrs14 family are major transcriptional regulators and act as archaeal biofilm regulators (AbfRs) in the crenarchaeote Sulfolobus acidocaldarius. Here, the first crystal structure of an AbfR ortholog, AbfR2, the deletion of which is known to impair biofilm formation, is presented. Like most other wHTH orthologs, AbfR2 is dimeric in solution as well as in its 2.45 Å resolution crystal structure. Given the presence of three independent AbfR2 dimers in the asymmetric unit, the crystal structure shows a considerable degree of conformational variation within the dimer, the antiparallel orientations of which are stabilized by coiled-coil interaction between H4 helices. Conserved anchor interactions between helices H0 and H4 of AbfR2 further contribute to dimer stabilization. The combined structural and bioinformatic analysis reveals cluster-specific structural differences between different members of the Lrs14 protein family.
External linksActa Crystallogr D Struct Biol / PubMed:30387769
MethodsSAS (X-ray synchrotron) / X-ray diffraction
Resolution2.45 Å
Structure data

SASDDH3:
Solution Structure of Archaeal Biofilm Regulator 2 (AbfR2)
Method: SAXS/SANS

PDB-6cmv:
Crystal structure of Archaeal Biofilm Regulator (AbfR2) from Sulfolobus acidocaldarius
Method: X-RAY DIFFRACTION / Resolution: 2.45 Å

Chemicals

ChemComp-GOL:
GLYCEROL

ChemComp-MPD:
(4S)-2-METHYL-2,4-PENTANEDIOL / precipitant*YM

ChemComp-HOH:
WATER

Source
  • Sulfolobus acidocaldarius (strain atcc 33909 / dsm 639 / jcm 8929 / nbrc 15157 / ncimb 11770) (acidophilic)
  • sulfolobus acidocaldarius (acidophilic)
KeywordsGENE REGULATION / wHTH / Archaea / biofilm

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