Determination of the nuclear magnetic resonance solution structure of an Antennapedia homeodomain-DNA complex.Billeter, M., Qian, Y.Q., Otting, G., Muller, M., Gehring, W., Wuthrich, K.
(1993) J.Mol.Biol. 234: 1084-1097
- PubMed: 7903398
- DOI: 10.1006/jmbi.1993.1661
- PubMed Abstract:
- Protein-DNA Contacts in the Structure of a Homeodomain-DNA Complex Determined by Nuclear Magnetic Resonance Spectroscopy in Solution
Otting, G.,Qian, Y.Q.,Billeter, M.,Mueller, M.,Affolter, M.,Gehring, W.J.,Wuthrich, K.
(1990) Embo J. 9: 3085
- Determination of the Three-Dimensional Structure of the Antennapedia Homeodomain from Drosophila in Solution by 1H Nuclear Magnetic Resonance Spectroscopy
Billeter, M.,Qian, Y.-Q.,Otting, G.,Mueller, M.,Gehring, W.J.,Wuthrich, K.
(1990) J.Mol.Biol. 214: 183
- Nuclear magnetic resonance spectroscopy of a DNA complex with the uniformly 13C-labeled Antennapedia homeodomain and structure determination of the DNA-bound homeodomain
Qian, Y.Q.,Otting, G.,Billeter, M.,Mueller, M.,Gehring, W.J.,Wuthrich, K.
(1993) J.Mol.Biol. 234: 1070
- The Structure of the Antennapedia Homeodomain Determined by NMR Spectroscopy in Solution: Comparison with Prokaryotic Repressors
Qian, Y.-Q.,Billeter, M.,Otting, G.,Mueller, M.,Gehring, W.J.,Wuthrich, K.
(1989) Cell 59: 573
The nuclear magnetic resonance (NMR) solution structure of a complex formed by the mutant Antennapedia homeodomain with Cys39 replaced by Ser, Antp(C39S), and a 14 base-pair DNA duplex containing the BS2 operator sequence was determined using uniform ...
The nuclear magnetic resonance (NMR) solution structure of a complex formed by the mutant Antennapedia homeodomain with Cys39 replaced by Ser, Antp(C39S), and a 14 base-pair DNA duplex containing the BS2 operator sequence was determined using uniform 13C and 15N-labeling of the protein. Two-dimensional nuclear Overhauser enhancement spectroscopy ([1H,1H]NOESY) with 15N(omega 2)-half-filter and 13C(omega 1, omega 2)-double-half-filter, and three-dimensional heteronuclear-correlated [1H,1H]NOESY yielded a total of 855 intramolecular NOE upper distance constraints in the homeodomain, 151 upper distance constraints within the DNA duplex, and 39 intermolecular protein-DNA upper distance constraints. These data were used as the input for the structure calculation with simulated annealing followed by molecular dynamics in a water bath and energy refinement. A group of 16 conformers was thus generated which represent the solution structure of the Antp(C39S) homeodomain-DNA complex. The new structure determination confirms the salient features reported previously from a preliminary investigation of the same complex, in particular the location of the recognition helix in the major groove with the turn of the helix-turn-helix motif outside the contact area with the DNA, and the N-terminal arm of the homeodomain contacting the minor groove of the DNA. In addition, distinct amino acid side-chain-DNA contacts could be identified, and evidence was found that the invariant residue Asn51 (and possibly also Gln50) is in a slow dynamic equilibrium between two or several different DNA contact sites. The molecular dynamics calculations in a water bath yielded structures with hydration water molecules in the protein-DNA interface, which coincides with direct NMR observations of hydration waters. In the Appendix the experimental data obtained with the Antp(C39S) homeodomain-DNA complex and the techniques used for the structure calculation are evaluated using a simulated input data set derived from the X-ray crystal structure of a DNA complex with a homologous homeodomain. This study indicates that a nearly complete set of NOE upper distance constraints for the Antp(C39S) homeodomain and the protein-DNA interface was presently obtained. It further shows that the structure calculation used here yields a precise reproduction of the crystal structure from the simulated input data, and also results in hydration of the protein-DNA interface in the recalculated complex.
Institut für Molekularbiologie und Biophysik Eidgenössische Technische Hochschule-Hönggerberg, Zürich, Switzerland.