Structure of thioredoxin from Trypanosoma brucei brucei
Friemann, R., Schmidt, H., Ramaswamy, S., Forstner, M., Krauth-Siegel, R.L., Eklund, H.(2003) FEBS Lett 554: 301-305
- PubMed: 14623083 
- DOI: https://doi.org/10.1016/s0014-5793(03)01173-6
- Primary Citation of Related Structures:  
1R26 - PubMed Abstract: 
The three-dimensional structure of thioredoxin from Trypanosoma brucei brucei has been determined at 1.4 A resolution. The overall structure is more similar to that of human thioredoxin than to any other thioredoxin structure. The most striking difference to other thioredoxins is the absence of a buried carboxylate behind the active site cysteines. Instead of the common Asp, there is a Trp that binds an ordered water molecule probably involved in the protonation/deprotonation of the more buried cysteine during catalysis. The conserved Trp in the WCGPC sequence motif has an exposed position that can interact with target proteins.
Organizational Affiliation: 
Department of Molecular Biosciences, Swedish University of Agricultural Sciences, Biomedical Center, Box 590, S-75124 Uppsala, Sweden.