9cjg

P450-G9 from Actinokineospora terrae, a non-canonical, serine-ligated cytochrome P450 in the ligand-free, closed conformation

spinqualitylabelsall models 9cjg, resolution 1.85Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 9cjg is a 2 chain structure with sequence from Pseudonocardiaceae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.85Å Ligands: 1BO, FMT, HEM Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A1H9KM06_9PSEU Publication Abstract from PubMed Cytochrome P450s (CYPs) are a superfamily of thiolate-ligated heme metalloenzymes principally responsible for the hydroxylation of unactivated C-H bonds. The lower-axial cysteine is an obligatory and universally conserved residue for the CYP enzyme class. Herein, we challenge this paradigm by systematically identifying non-canonical CYPs (ncCYPs) that do not harbor a cysteine ligand. Our bioinformatic search reveals 20 distinct ncCYP families with diverse ligands encoded in microbial genomes. We characterize a native serine-ligated CYP with a high-spin ferric resting state. Its crystal structure clearly shows a typical CYP fold and a serine alkoxide as a lower axial heme ligand. In addition, we report the discovery and characterization of the first native selenocysteine-ligated CYP in nature. Our findings radically expand the CYP metalloenzyme family. Non-Canonical Cytochrome P450 Enzymes in Nature.,Nguy AKL, Ireland KA, Kayrouz CM, Caceres JC, Greene BL, Davis KM, Seyedsayamdost MR bioRxiv [Preprint]. 2024 Dec 23:2024.12.22.630014. doi: , 10.1101/2024.12.22.630014. PMID:39763895 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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