title: Utilization of paramagnetic relaxation enhancements for high-resolution NMR structure determination of a soluble loop-rich protein with sparse NOE distance restraints.
abstract: NMR structure determination of soluble proteins depends in large part on distance restraints derived from NOE. In this study, we examined the impact of paramagnetic relaxation enhancement (PRE)-derived distance restraints on protein structure determination. A high-resolution structure of the loop-rich soluble protein Sin1 could not be determined by conventional NOE-based procedures due to an insufficient number of NOE restraints. By using the 867 PRE-derived distance restraints obtained from the NOE-based structure determination procedure, a high-resolution structure of Sin1 could be successfully determined. The convergence and accuracy of the determined structure were improved by increasing the number of PRE-derived distance restraints. This study demonstrates that PRE-derived distance restraints are useful in the determination of a high-resolution structure of a soluble protein when the number of NOE constraints is insufficient.
authors.affiliation: Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka, 565-0871, Japan.
authors.forename: Kyoko
authors.initials: K
authors.lastname: Furuita
authors.forename: Saori
authors.initials: S
authors.lastname: Kataoka
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Sugiki
authors.forename: Yoshikazu
authors.initials: Y
authors.lastname: Hattori
authors.forename: Naohiro
authors.initials: N
authors.lastname: Kobayashi
authors.forename: Takahisa
authors.initials: T
authors.lastname: Ikegami
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Shiozaki
authors.forename: Toshimichi
authors.initials: T
authors.lastname: Fujiwara
authors.forename: Chojiro
authors.initials: C
authors.lastname: Kojima
mesh_terms: D004268:DNA-Binding Proteins / Q000737:chemistry* / Q000235:genetics; D006801:Humans; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000295:instrumentation* / Q000379:methods*; D012568:Schizosaccharomyces / Q000737:chemistry* / Q000235:genetics; D029702:Schizosaccharomyces pombe Proteins / Q000737:chemistry* / Q000235:genetics
chemical_list: D004268:DNA-Binding Proteins; D029702:Schizosaccharomyces pombe Proteins