Crystallographic analysis of synechocystis cyanoglobin reveals the structural changes accompanying ligand binding in a hexacoordinate hemoglobin.
Trent III, J.T., Kundu, S., Hoy, J.A., Hargrove, M.S.(2004) J Mol Biol 341: 1097-1108
- PubMed: 15289104 
- DOI: 10.1016/j.jmb.2004.05.070
- Primary Citation of Related Structures:  
1S69, 1S6A - PubMed Abstract: 
The crystal structures of cyanide and azide-bound forms of the truncated hemoglobin from Synechocystis are presented at 1.8 angstroms resolution. A comparison with the structure of the endogenously liganded protein reveals a conformational shift unprecedented in hemoglobins, and provides the first picture of a hexacoordinate hemoglobin in both the bis-histidyl and the exogenously coordinated states ...