Download MendeleyCrystal structure of MyoD bHLH domain-DNA complex: perspectives on DNA recognition and implications for transcriptional activation.
Ma, P.C., Rould, M.A., Weintraub, H., Pabo, C.O.(1994) Cell 77: 451-459
- PubMed: 8181063
- DOI: https://doi.org/10.1016/0092-8674(94)90159-7
- Primary Citation of Related Structures:
1MDY - PubMed Abstract:
The crystal structure of a MyoD basic-helix-loop-helix (bHLH) domain-DNA complex has been solved and refined at 2.8 A resolution. This structure proves that bHLH and bHLH-leucine zipper (bHLH-ZIP) proteins are remarkably similar; it helps us understand subtle differences in binding preferences for these proteins; and it has surprising implications for our understanding of transcription. Specifically, Ala-114 and Thr-115, which are required for positive control in the myogenic proteins, are buried at the protein-DNA interface. These residues are not available for direct protein-protein contacts, but they may determine the conformation of Arg-111. Comparisons with Max suggest that the conformation of this arginine, which is different in the two structures, may play an important role in myogenic transcription.
Organizational Affiliation:
Department of Biology, Howard Hughes Medical Institute, Massachusetts Institute of Technology, Cambridge 02139.
