8hfd | pdb_00008hfd

Crystal structure of allantoinase from E. coli BL21

spinqualitylabelsall models 8hfd, resolution 2.07Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 8hfd is a 4 chain structure with sequence from Escherichia coli. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.07Å Ligands: KCX, PEG, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A1V3VVF3_ECOLX Catalyzes the conversion of allantoin (5-ureidohydantoin) to allantoic acid by hydrolytic cleavage of the five-member hydantoin ring.[HAMAP-Rule:MF_01645] Publication Abstract from PubMed Allantoinase (ALLase; EC 3.5.2.5) possesses a binuclear metal center in which two metal ions are bridged by a posttranslationally carbamylated lysine. ALLase acts as a key enzyme for the biogenesis and degradation of ureides by catalyzing the conversion of allantoin into allantoate. Biochemically, ALLase belongs to the cyclic amidohydrolase family, which also includes dihydropyrimidinase, dihydroorotase, hydantoinase (HYDase), and imidase. Previously, the crystal structure of ALLase from Escherichia coli K-12 (EcALLase-K12) was reported; however, the two active site loops crucial for substrate binding were not determined. This situation would limit further docking and protein engineering experiments. Here, we solved the crystal structure of E. coli BL21 ALLase (EcALLase-BL21) at a resolution of 2.07 A (PDB ID 8HFD) to obtain more information for structural analyses. The structure has a classic TIM barrel fold. As compared with the previous work, the two missed active site loops in EcALLase-K12 were clearly determined in our structure of EcALLase-BL21. EcALLase-BL21 shared active site similarity with HYDase, an important biocatalyst for industrial production of semisynthetic penicillin and cephalosporins. Based on this structural comparison, we discussed the functional role of the two active site loops in EcALLase-BL21 to better understand the substrate/inhibitor binding mechanism for further biotechnological and pharmaceutical applications. Crystal Structure of Allantoinase from Escherichia coli BL21: A Molecular Insight into a Role of the Active Site Loops in Catalysis.,Huang YH, Yang PC, Lin ES, Ho YY, Peng WF, Lu HP, Huang CC, Huang CY Molecules. 2023 Jan 13;28(2):827. doi: 10.3390/molecules28020827. PMID:36677881 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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