Site-directed mutagenesis reveals a conservation of the copper-binding site and the crucial role of His24 in CopH from Cupriavidus metallidurans CH34.

Abstract excerpt

CopH is a periplasmic copper-binding protein from Cupriavidus metallidurans CH34 that contains two histidine residues. Both His24 and His26 contribute to the formation of two high-affinity copper-binding sites in wild-type CopH and are likely involved in a 2N2O coordination sphere in the equatorial plane. We have used site-directed mutagenesis, and a series of spectroscopic and calorimetric studies to further...

Topics

• Binding Sites
• Carrier Proteins
• Copper
• Cupriavidus
• Histidine
• Mutagenesis, Site-Directed
• Mutation
• Protein Binding