1a7d | pdb_00001a7d

CHLOROMET MYOHEMERYTHRIN FROM THEMISTE ZOSTERICOLA

spinqualitylabelsall models 1a7d, resolution 1.80Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1a7d is a 1 chain structure with sequence from Themiste hennahi. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CFO, CL Resources: FirstGlance, OCA, RCSB, PDBsum 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 PubMed Myohemerythrin (Mhr) is a nonheme iron oxygen carrier found in the retractor muscles of marine "peanut" worms. The X-ray crystal structures of two recombinant Themiste zostericola Mhrs are reported to a resolution of 1.8 A. Surprisingly, the met wild-type structure (R = 17.8%) was found to contain chloride bound to Fe2, while coordinated hydroxide was found in the met L103N structure (R = 18.3%). An internal water molecule was also found distal to the Fe-O-Fe center of the mutant protein, forming hydrogen bonds with the coordinated hydroxide and the OD1 atom of Asn-103. This finding is consistent with the kinetic and spectroscopic results reported for the L103N mutant Mhr [Raner, G. M., Martins, L. J., & Ellis, W. R., Jr. (1997) Biochemistry 36, 7037-7043]. Possible roles for the side chain of residue 103 (Leu in wild-type Mhr) in gating ligand binding are also discussed. Structures of wild-type chloromet and L103N hydroxomet Themiste zostericola myohemerythrins at 1.8 A resolution.,Martins LJ, Hill CP, Ellis WR Jr Biochemistry. 1997 Jun 10;36(23):7044-9. PMID:9188702 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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