Download MendeleyCrystallographic snapshots along a protein-induced DNA-bending pathway.
Horton, N.C., Perona, J.J.(2000) Proc Natl Acad Sci U S A 97: 5729-5734
- PubMed: 10801972
- DOI: https://doi.org/10.1073/pnas.090370797
- Primary Citation of Related Structures:
1EOO, 1EOP - PubMed Abstract:
Two new high-resolution cocrystal structures of EcoRV endonuclease bound to DNA show that a large variation in DNA-bending angles is sampled in the ground state binary complex. Together with previous structures, these data reveal a contiguous series of protein conformational states delineating a specific trajectory for the induced-fit pathway. Rotation of the DNA-binding domains, together with movements of two symmetry-related helices binding in the minor groove, causes base unstacking at a key base-pair step and propagates structural changes that assemble the active sites. These structures suggest a complex mechanism for DNA bending that depends on forces generated by interacting protein segments, and on selective neutralization of phosphate charges along the inner face of the bent double helix.
- Department of Chemistry and Biochemistry and Interdepartmental Program in Biochemistry and Molecular Biology, University of California, Santa Barbara, CA 93106-9510, USA.
Organizational Affiliation:
