1yyd

High Resolution Crystal Structure of Manganese Peroxidase

spinqualitylabelsall models 1yyd, resolution 1.45Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1yyd is a 1 chain structure with sequence from Phanerodontia chrysosporium. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.45Å Ligands: CA, GOL, HEM, MAN, MN, NAG, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function PEM1_PHACH Catalyzes the oxidation of Mn(2+) to Mn(3+). The latter, acting as a diffusible redox mediator, is capable of oxidizing a variety of lignin compounds. 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 Manganese peroxidase (MnP) is an extracellular heme enzyme that catalyzes the peroxide-dependent oxidation of Mn(II) to Mn(III). The Mn(III) is released from the enzyme in complex with oxalate. One heme propionate and the side chains of Glu35, Glu39, and Asp179 were identified as Mn(II) ligands in the 2.0 A resolution crystal structure. The new 1.45 A crystal structure of MnP complexed with Mn(II) provides a more accurate view of the Mn-binding site. New features include possible partial protonation of Glu39 in the Mn-binding site and glycosylation at Ser336. This is also the first report of MnP-inhibitor complex structures. At the Mn-binding site, divalent Cd(II) exhibits octahedral, hexacoordinate ligation geometry similar to that of Mn(II). Cd(II) also binds to a putative second weak metal-binding site with tetrahedral geometry at the C-terminus of the protein. Unlike that for Mn(II) and Cd(II), coordination of trivalent Sm(III) at the Mn-binding site is octacoordinate. Sm(III) was removed from a MnP-Sm(III) crystal by soaking the crystal in oxalate and then reintroduced into the binding site. Thus, direct comparisons of Sm(III)-bound and metal-free structures were made using the same crystal. No ternary complex was observed upon incubation with oxalate. The reversible binding of Sm(III) may be a useful model for the reversible binding of Mn(III) to the enzyme, which is too unstable to allow similar examination. High-resolution crystal structure of manganese peroxidase: substrate and inhibitor complexes.,Sundaramoorthy M, Youngs HL, Gold MH, Poulos TL Biochemistry. 2005 May 3;44(17):6463-70. PMID:15850380 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Manganese peroxidase

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