Structure and regulatory mechanism of Aquifex aeolicus NtrC4: variability and evolution in bacterial transcriptional regulation.
Batchelor, J.D., Doucleff, M., Lee, C.J., Matsubara, K., De Carlo, S., Heideker, J., Lamers, M.H., Pelton, J.G., Wemmer, D.E.(2008) J Mol Biol 384: 1058-1075
- PubMed: 18955063 
- DOI: 10.1016/j.jmb.2008.10.024
- Primary Citation of Related Structures:  
3DZD, 3E7L - PubMed Abstract: 
Genetic changes lead gradually to altered protein function, making deduction of the molecular basis for activity from a sequence difficult. Comparative studies provide insights into the functional consequences of specific changes. Here we present structural and biochemical studies of NtrC4, a sigma-54 activator from Aquifex aeolicus, and compare it with NtrC1 (a paralog) and NtrC (a homolog from Salmonella enterica) to provide insight into how a substantial change in regulatory mechanism may have occurred ...