title: Determination of h2J(NN) and h1J(HN) coupling constants across Watson-Crick base pairs in the Antennapedia homeodomain-DNA complex using TROSY.
abstract: This paper describes NMR measurements of 15N-15N and 1H-15N scalar couplings across hydrogen bonds in Watson-Crick base pairs, h2J(NN) and h1J(HN), in a 17 kDa Antennapedia homeodomain-DNA complex. A new NMR experiment is introduced which relies on zero-quantum coherence-based transverse relaxation-optimized spectroscopy (ZQ-TROSY) and enables measurements of h1J(HN) couplings in larger molecules. The h2JNN and h1J(HN) couplings open a new avenue for comparative studies of DNA duplexes and other forms of nucleic acids free in solution and in complexes with proteins, drugs or possibly other classes of compounds.
authors.affiliation: Institut für Molekularbiologie und Biophysik, Eidgenössische Technische Hochschule Hönggerberg, Zürich, Switzerland.
authors.forename: K
authors.initials: K
authors.lastname: Pervushin
authors.forename: C
authors.initials: C
authors.lastname: Fernández
authors.forename: R
authors.initials: R
authors.lastname: Riek
authors.forename: A
authors.initials: A
authors.lastname: Ono
authors.forename: M
authors.initials: M
authors.lastname: Kainosho
authors.forename: K
authors.initials: K
authors.lastname: Wüthrich
mesh_terms: D051943:Antennapedia Homeodomain Protein; D020029:Base Pairing; D004247:DNA / Q000737:chemistry*; D018398:Homeodomain Proteins / Q000737:chemistry*; D006860:Hydrogen Bonding; D019906:Nuclear Magnetic Resonance, Biomolecular / Q000379:methods*; D009687:Nuclear Proteins; D009875:Operator Regions, Genetic; D011485:Protein Binding; D014157:Transcription Factors
chemical_list: D051943:Antennapedia Homeodomain Protein; D018398:Homeodomain Proteins; D009687:Nuclear Proteins; D014157:Transcription Factors; D004247:DNA