Direct and indirect readout in mutant Met repressor-operator complexes.
Garvie, C.W., Phillips, S.E.(2000) Structure 8: 905-914
- PubMed: 10986458 
- DOI: https://doi.org/10.1016/s0969-2126(00)00182-9
- Primary Citation of Related Structures:  
1MJ2, 1MJM, 1MJO, 1MJP, 1MJQ - PubMed Abstract: 
The methionine repressor, MetJ, represses the transcription of genes involved in methionine biosynthesis by binding to arrays of two to five adjacent copies of an eight base-pair 'metbox' sequence. Naturally occurring operators differ from the consensus sequence to a greater extent as the number of metboxes increases. MetJ, while accommodating this sequence variation in natural operators, is very sensitive to particular base changes, even where bases are not directly contacted in the crystal structure of a complex formed between the repressor and consensus operator.
Organizational Affiliation: 
Astbury Centre for Structural Molecular Biology, School of Biochemistry and Molecular Biology, University of Leeds, LS2 9JT, Leeds, UK.