Crystal structures of two mutants (K206Q, H207E) of the N-lobe of human transferrin with increased affinity for iron.
Yang, A.H., MacGillivray, R.T., Chen, J., Luo, Y., Wang, Y., Brayer, G.D., Mason, A.B., Woodworth, R.C., Murphy, M.E.(2000) Protein Sci 9: 49-52
- PubMed: 10739246
- DOI: https://doi.org/10.1110/ps.9.1.49
- Primary Citation of Related Structures:
1D3K, 1D4N - PubMed Abstract:
The X-ray crystallographic structures of two mutants (K206Q and H207E) of the N-lobe of human transferrin (hTF/2N) have been determined to high resolution (1.8 and 2.0 A, respectively). Both mutant proteins bind iron with greater affinity than native hTF/2N. The structures of the K206Q and H207E mutants show interactions (both H-bonding and electrostatic) that stabilize the interaction of Lys296 in the closed conformation, thereby stabilizing the iron bound forms.
Organizational Affiliation:
Department of Biochemistry & Molecular Biology, University of British Columbia, Vancouver, Canada.