6ltm | pdb_00006ltm

The dimeric structure of G80A/H81A/H82A myoglobin

spinqualitylabelsall models 6ltm, resolution 1.65Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6ltm is a 2 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: HEM Related: 6ls8 Gene: MB (Equus caballus) 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. Publication Abstract from PubMed Domain swapping is an exception to Anfinsen's dogma, and more than one structure can be produced from the same amino acid sequence by domain swapping. We have previously shown that myoglobin (Mb) can form a domain-swapped dimer in which the hinge region is converted to a helical structure. In this study, we showed that domain-swapped dimerization of Mb was achieved by a single Ala mutation of Gly at position 80. Multiple Ala mutations at positions 81 and 82 in addition to position 80 facilitated dimerization of Mb by stabilization of the dimeric states. Domain swapping tendencies correlated well with the helical propensity of the mutated residue in a series of Mb mutants with amino acids introduced to the hinge region. These findings demonstrate that a single mutation in the hinge loop to modify helical propensity can control oligomer formation, providing new ideas to create high-order protein oligomers using domain swapping. Thermodynamic Control of Domain Swapping by Modulating the Helical Propensity in the Hinge Region of Myoglobin.,Nagao S, Suda A, Kobayashi H, Shibata N, Higuchi Y, Hirota S Chem Asian J. 2020 Apr 24. doi: 10.1002/asia.202000307. PMID:32329228 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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