Related ArticlesNMR structure determination reveals that the homeodomain is connected through a flexible linker to the main body in the Drosophila Antennapedia protein.
Proc Natl Acad Sci U S A. 1992 Nov 15;89(22):10738-42
Authors: Qian YQ, Otting G, Furukubo-Tokunaga K, Affolter M, Gehring WJ, Wüthrich K
The secondary structure of an N-terminally elongated Antennapedia (Antp) homeodomain (HD) polypeptide containing residues -14 to 67, where residues 1-60 constitute the HD, has been determined by NMR in solution. This polypeptide contains the conserved motif -Tyr-Pro-Trp-Met- (YPWM) at positions -9 to -6. Despite the hydrophobic nature of this tetrapeptide motif, the N-terminal arm consisting of residues -14 to 6 is flexibly disordered, and the well-defined part of the HD structure with residues 7-59 is indistinguishable from that of the shorter Antp HD polypeptide (where positions 0, 1, and 67 are methionine, arginine, and glycine, respectively). In vitro biochemical studies showed that the stability and specificity of the DNA binding previously observed for the shorter Antp HD polypeptide is preserved in the elongated polypeptide. These results strongly support the view that the HD is connected through a flexible linker to the main body in the Antp protein and that the minor groove contacts by the N-terminal arm (residues 1-6) in the Antp HD-DNA complex are an intrinsic feature of the DNA-binding interactions of the intact Antp protein.
New method reveals protein structure - The Brown Daily Herald
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New method reveals protein structure
The Brown Daily Herald
Their new method for determining protein structure integrates small-angle X-ray scattering and nuclear magnetic resonance spectroscopy, allowing a greater level of detail and representing "a new wavefront of biology," said Dorothy Koveal GS, ...
New method reveals protein structure - The Brown Daily Herald
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