9jer

Arginine decarboxylase in Aspergillus oryzae, ligand-free form

spinqualitylabelsall models 9jer, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 9jer is a 8 chain structure with sequence from Aspergillus oryzae RIB40. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.9Å Ligands: EDO, PEG, PYR Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q2UAM5_ASPOR Publication Abstract from PubMed Agmatine, a natural polyamine also known as 4-aminobutyl-guanidine, is biosynthesized from arginine by decarboxylation. Aspergillus oryzae contains high amounts of agmatine, suggesting highly active arginine decarboxylase (ADC) in this organism. However, genome analysis revealed no ADC homolog in A. oryzae. A. oryzae strain RIB40 has six homologs of phosphatidylserine decarboxylase (PSD), an enzyme that synthesizes phosphatidyl ethanolamine from phosphatidylserine. We previously discovered that one of these homologs, AO090102000327, encodes arginine decarboxylase, which we named ADC1. In the present study, we determined the crystal structures of ligand-free, arginine-treated, and agmatine-treated ADC1 each at 1.9-2.15 A resolution. Each structure contained four ADC1 molecules (chains A-D) in the asymmetric unit of the cell. Each ADC1 molecule is a heterodimer consisting of the N-terminal region (Asn60-Gly441) and C-terminal region (Ser442-Thr482). In the ligand-free ADC1, the N-terminus of Ser442 was modified to form a pyruvoyl group. In the arginine-treated ADC1, arginine was converted to agmatine, with the pyruvoyl group covalently bound to agmatine by forming a Schiff base. The same structure was observed in agmatine-treated ADC1. These results indicate that ADC1 is a pyruvoyl-dependent decarboxylase and unveils the reaction mechanism of ADC from A. oryzae. Unveiling the reaction mechanism of arginine decarboxylase in Aspergillus oryzae: Insights from crystal structure analysis.,Odagaki Y, Murakami Y, Takita T, Mizutani K, Mikami B, Fujiwara S, Yasukawa K Biochem Biophys Res Commun. 2024 Nov 12;733:150728. doi: , 10.1016/j.bbrc.2024.150728. Epub 2024 Sep 21. PMID:39321488 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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