Journal of the Korean Magnetic Resonance Society (한국자기공명학회논문지)

Korean Magnetic Resonance Society (한국자기공명학회)
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Backbone 1H, 15N, and 13C resonance assignments and secondary structure prediction of SAV2228 (translation initiation factor-1) from Staphylococcus aureus

  • Kim, Do-Hee (Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University) ;
  • Jang, Sun-Bok (Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University) ;
  • Lee, Bong-Jin (Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University)
  • Received : 2012.11.09
  • Accepted : 2012.12.10
  • Published : 2012.12.20
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Abstract

SAV2228 has an OB (Oligomer-Binding)-motif which is frequently used for nucleic acid recognition. To characterize the activity of translation initiation factor-1 (IF-1) from Staphylococcus aureus, SAV2228 was expressed and purified in Escherichia coli. We acquired 3D NMR spectra showing well dispersed and homogeneous signals which allow us to assign 94.4% of all $^1HN$, $^{15}N$, $^{13}C{\alpha}$, $^{13}C{\beta}$ and $^{13}CO$ resonances. We could predict a secondary structure of SAV2228 using TALOS and CSI from NMR data. SAV2228 was consisted of one ${\alpha}$-helix and five ${\beta}$-sheets. The predicted secondary structure, ${\beta}-{\beta}-{\beta}-{\alpha}-{\beta}-{\beta}$, was similar to other bacterial IF-1, but it was not completely same to the eukaryotic one. Assigned NMR peaks and secondary structre prediction can be used for the study on interaction with nucleic acid in the future.

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