Co-crystal structure of the HNF-3/fork head DNA-recognition motif resembles histone H5
Abstract
The three-dimensional structure of an HNF-3/fork head DNA-recognition motif complexed with DNA has been determined by X-ray crystallography at 2.5 Å resolution. This α/β protein binds B-DNA as a monomer, through interactions with the DNA backbone and through both direct and water-mediated major and minor groove base contacts, inducing a 13° bend. The transcription factor fold is very similar to the structure of histone H5. In its amino-terminal half, three α-helices adopt a compact structure that presents the third helix to the major groove. The remainder of the protein includes a twisted, antiparallel β-structure and random coil that interacts with the minor groove.
- Publication:
-
Nature
- Pub Date:
- July 1993
- DOI:
- 10.1038/364412a0
- Bibcode:
- 1993Natur.364..412C