2hmz
From Proteopedia
THE STRUCTURES OF MET AND AZIDOMET HEMERYTHRIN AT 1.66 ANGSTROMS RESOLUTION
Structural highlights
FunctionHEMT_THEDY Hemerythrin is a respiratory protein in blood cells of certain marine worms. The oxygen-binding site in each chain contains two iron atoms. Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMedThe crystallographic refinement of met and azidomet hemerythrin has been carried out at 1.66 A resolution in an attempt to characterize precisely the binuclear iron center in this protein. Restrained least-squares refinement has produced molecular models giving R-values of 18.9% for met (65,683 reflections from 10 A to 1.66 A) and 17.6% for azidomet hemerythrin (68,747 reflections from 10.0 A to 1.66 A). The protein structure in each derivative is very similar to that of myohemerythrin. The mu-oxo bridged iron center differs between the two forms. The complex in met hemerythrin is asymmetric with the bridging oxygen closer to one of the iron atoms while the complex in azidomet hemerythrin is symmetric. After investigations of the effects of correlation in the refinement, we believe this difference between the two complexes is associated with chemical differences and is not a refinement artefact. Structures of met and azidomet hemerythrin at 1.66 A resolution.,Holmes MA, Stenkamp RE J Mol Biol. 1991 Aug 5;220(3):723-37. PMID:1870128[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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