NMR and X-ray analysis of structural additivity in metal binding site-swapped hybrids of rubredoxin.
Lemaster, D.M., Anderson, J.S., Wang, L., Guo, Y., Li, H., Hernandez, G.(2007) BMC Struct Biol 7: 81-81
- PubMed: 18053245 
- DOI: https://doi.org/10.1186/1472-6807-7-81
- Primary Citation of Related Structures:  
2PVE, 2PVX - PubMed Abstract: 
Chimeric hybrids derived from the rubredoxins of Pyrococcus furiosus (Pf) and Clostridium pasteurianum (Cp) provide a robust system for the characterization of protein conformational stability and dynamics in a differential mode. Interchange of the seven nonconserved residues of the metal binding site between the Pf and Cp rubredoxins yields a complementary pair of hybrids, for which the sum of the thermodynamic stabilities is equal to the sum for the parental proteins. Furthermore, the increase in amide hydrogen exchange rates for the hyperthermophile-derived metal binding site hybrid is faithfully mirrored by a corresponding decrease for the complementary hybrid that is derived from the less thermostable rubredoxin, indicating a degree of additivity in the conformational fluctuations that underlie these exchange reactions.
Organizational Affiliation: 
Wadsworth Center, New York State Department of Health, School of Public Health, University at Albany - SUNY, Empire State Plaza, Albany, New York 12201, USA. lemaster@wadsworth.org