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Backbone 1H, 15N, and 13C Resonance Assignment and Secondary Structure Prediction of HP0495 from Helicobacter pylori

  • Seo, Min-Duk (Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University) ;
  • Park, Sung-Jean (Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University) ;
  • Kim, Hyun-Jung (Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University) ;
  • Seok, Seung-Hyeon (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)
  • Published : 2007.09.30

Abstract

HP0495 (Swiss-Prot ID; Y495_HELPY) is an 86-residue hypothetical protein from Helicobacter pylori strain 26695. The function of HP0495 cannot be identified based on sequence homology, and HP0495 is included in a fairly unique sequence family. Here, we report the sequencespecific backbone resonance assignments of HP0495. About 97% of all the $^1HN$, $^{15}N$, $^{13}C{\alpha}$, $^{13}C{\beta}$, and $^{13}CO$ resonances were assigned unambiguously. We could predict the secondary structure of HP0495, by analyzing the deviation of the $^{13}C{\alpha}$ and $^{13}C{\beta}$ shemical shifts from their respective random coil values. Secondary structure prediction shows that HP0495 consists of two $\alpha$-helices and four $\beta$-strands. This study is a prerequisite for determining the solution structure of HP0495 and investigating the protein-protein interaction between HP0495 and other Helicobacter pylori proteins.

Keywords

References

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