The solution structure of Lac repressor headpiece 62 complexed to a symmetrical lac operator.
Spronk, C.A., Bonvin, A.M., Radha, P.K., Melacini, G., Boelens, R., Kaptein, R.(1999) Structure 7: 1483-1492
- PubMed: 10647179 
- DOI: https://doi.org/10.1016/s0969-2126(00)88339-2
- Primary Citation of Related Structures:  
1CJG - PubMed Abstract: 
Lactose repressor protein (Lac) controls the expression of the lactose metabolic genes in Escherichia coli by binding to an operator sequence in the promoter of the lac operon. Binding of inducer molecules to the Lac core domain induces changes in tertiary structure that are propagated to the DNA-binding domain through the connecting hinge region, thereby reducing the affinity for the operator. Protein-protein and protein-DNA interactions involving the hinge region play a crucial role in the allosteric changes occurring upon induction, but have not, as yet, been analyzed in atomic detail.
Organizational Affiliation: 
Bijvoet Center for Biomolecular Research, Utrecht University, The Netherlands.