9lz4

Reductive-half reaction intermediate of copper amine oxidase from Arthrobacter globiformis captured by mix-and-inject serial crystallography at 200-ms time delay

spinqualitylabelsall models 9lz4, resolution 1.82Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 9lz4 is a 2 chain structure with sequence from Arthrobacter globiformis. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.82Å Ligands: CU, NA, PEA, TYQ Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function PAOX_ARTGO Publication Abstract from PubMed Protein dynamics play a crucial role in various physiological functions, including enzyme catalysis. To explore conformational changes during enzyme catalysis, we conduct mix-and-inject serial crystallography, an advanced technique to capture time-resolved protein structures in real time, using the microcrystals of bacterial copper amine oxidase containing a protein-derived quinone cofactor. Within 50 ms of mixing the microcrystals (<4 mum) with a preferred substrate (2-phenylethylamine) under anaerobic conditions (reductive half-reaction), we observe domain movements associated with substrate binding and formation of a metastable reaction intermediate, a product Schiff-base of the quinone cofactor. At 100-1000 ms after mixing, conformational transition from aminoresorcinol to the semiquinone radical forms of the reduced cofactor progresses gradually, likely depending on the replacement of the product aldehyde by the next-cycle amine substrate that triggers the cofactor conformational change. Overall, this study provides structural insight into enzyme catalysis accompanying the active-site conformational changes that are hardly scrutinized by studies in solution. Real-time capture of domain movements during copper amine oxidase catalysis by mix-and-inject serial crystallography.,Murakawa T, Suzuki M, Fukui K, Masuda T, Mizohata E, Miyahara I, Kurauchi I, Murakami T, Matsunaga H, Montawa Y, Nakajima N, Oozeki T, Sakai K, Son T, Higuchi T, Sunami T, Kimura T, Tono K, Tanaka T, Sugahara M, Arima T, Fangjia L, Kang J, Tanaka R, Iwata S, Nango E, Tosha T, Yano T, Tanizawa K, Okajima T Nat Commun. 2025 Dec 18;16(1):11149. doi: 10.1038/s41467-025-67230-5. PMID:41413268 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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