1dws

PHOTOLYZED CARBONMONOXY MYOGLOBIN (HORSE HEART)

spinqualitylabelsall models 1dws, resolution 1.45Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1dws is a 1 chain structure with sequence from Equus caballus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: CMO, HEM, SO4 Related: 1dwr, 1dwt, 1azi, 1yma, 1ymb, 1ymc, 1hrm, 1hsy, 1rse, 1xch, 1wla, 1bje Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function [MYG_HORSE] Serves as a reserve supply of oxygen and facilitates the movement of oxygen within muscles. 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 Small molecules such as NO, O2, CO or H2 are important biological ligands that bind to metalloproteins to function crucially in processes such as signal transduction, respiration and catalysis. A key issue for understanding the regulation of reaction mechanisms in these systems is whether ligands gain access to the binding sites through specific channels and docking sites, or by random diffusion through the protein matrix. A model system for studying this issue is myoglobin, a simple haem protein. Myoglobin has been studied extensively by spectroscopy, crystallography, computation and theory. It serves as an aid to oxygen diffusion but also binds carbon monoxide, a byproduct of endogenous haem catabolism. Molecular dynamics simulations, random mutagenesis and flash photolysis studies indicate that ligand migration occurs through a limited number of pathways involving docking sites. Here we report the 1.4 A resolution crystal structure of a ligand-binding intermediate in carbonmonoxy myoglobin that may have far-reaching implications for understanding the dynamics of ligand binding and catalysis. Structure of a ligand-binding intermediate in wild-type carbonmonoxy myoglobin.,Chu K, Vojtchovsky J, McMahon BH, Sweet RM, Berendzen J, Schlichting I Nature. 2000 Feb 24;403(6772):921-3. PMID:10706294 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Myoglobin

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