1n13

The Crystal Structure of Pyruvoyl-dependent Arginine Decarboxylase from Methanococcus jannashii

spinqualitylabelsall models 1n13, resolution 1.40Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1n13 is a 12 chain structure with sequence from Methanocaldococcus jannaschii. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.4Å Ligands: AG2, MRD, PYR Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function PDAD_METJA 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 The three-dimensional structure of pyruvoyl-dependent arginine decarboxylase from Methanococcus jannaschii was determined at 1.4 A resolution. The pyruvoyl group of arginine decarboxylase is generated by an autocatalytic internal serinolysis reaction at Ser53 in the proenzyme resulting in two polypeptide chains. The structure of the nonprocessing S53A mutant was also determined. The active site of the processed enzyme unexpectedly contained the reaction product agmatine. The crystal structure confirms that arginine decarboxylase is a homotrimer. The protomer fold is a four-layer alphabetabetaalpha sandwich with topology similar to pyruvoyl-dependent histidine decarboxylase. Highly conserved residues Asn47, Ser52, Ser53, Ile54, and Glu109 are proposed to play roles in the self-processing reaction. Agmatine binding residues include the C terminus of the beta chain (Ser52) from one protomer and the Asp35 side chain and the Gly44 and Val46 carbonyl oxygen atoms from an adjacent protomer. Glu109 is proposed to play a catalytic role in the decarboxylation reaction. Pyruvoyl-dependent arginine decarboxylase from Methanococcus jannaschii: crystal structures of the self-cleaved and S53A proenzyme forms.,Tolbert WD, Graham DE, White RH, Ealick SE Structure. 2003 Mar;11(3):285-94. PMID:12623016 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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