7KCI

DETERMINANTS OF REPRESSOR/OPERATOR RECOGNITION FROM THE STRUCTURE OF THE TRP OPERATOR BINDING SITE

Summary for 7KCI

• Entry DOI: 10.2210/pdb7kci/pdb
• Descriptor: Self-complementary deoxyoligonucleotide decamer d(CCACTAGTGG) (2 entities in total)
• Functional Keywords: b-dna, double helix, deoxyribonucleic acid, dna
• Biological source: synthetic construct
• Total number of polymer chains: 2
• Total formula weight: 6090.01

Authors

Shakked, Z.,Guzikevich-Guerstein, G.,Frolow, F.,Rabinovich, D.,Joachimiak, A.,Sigler, P.B. (deposition date: 1994-09-12, release date: 2020-10-14, Last modification date: 2024-04-03)

Primary citation

Shakked, Z.,Guzikevich-Guerstein, G.,Frolow, F.,Rabinovich, D.,Joachimiak, A.,Sigler, P.B.
Determinants of repressor/operator recognition from the structure of the trp operator binding site.
Nature, 368:469-473, 1994

PubMed Abstract: On the basis of the crystal structure of the trp repressor/operator complex, it has been proposed that the specificity of the interaction can be explained not only by direct hydrogen bonding and non-polar contacts between the protein and the bases of its target DNA, but also by indirect structural effects and water-mediated interactions. To understand the contribution of DNA structure and hydration in this context, the structure of the free DNA must be compared with its structure when complexed with the protein. Here we present the high-resolution crystal structure of the trp operator region that is most important in the recognition process. By comparing the free and bound states of the DNA regulatory sequence, we show that the structure and hydration of the DNA target are important elements in its recognition by the repressor protein.

PubMed: 8133895
DOI: 10.1038/368469a0

Experimental method

X-RAY DIFFRACTION (1.95 Å)