6a7j

Testerone bound CYP154C4 from Streptomyces sp. ATCC 11861

spinqualitylabelsall models 6a7j, resolution 2.71Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6a7j is a 1 chain structure with sequence from "actinomyces_violaceus-ruber"_(sic)_waksman_and_curtis_1916 "actinomyces violaceus-ruber" (sic) waksman and curtis 1916. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: HEM, TES Gene: B1H20_20375 ("Actinomyces violaceus-ruber" (sic) Waksman and Curtis 1916) Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Bacterial cytochrome P450 (CYP) enzymes are involved in the hydroxylation of various endogenous substrates while using a heme molecule as a cofactor. CYPs have gained biotechnological interest as useful biocatalysts capable of altering chemical structures by adding a hydroxyl group in a regiospecific manner. Here, we identified, purified, and characterized two CYP154C4 proteins from Streptomyces sp. W2061 (StCYP154C4-1) and Streptomyces sp. ATCC 11861 (StCYP154C4-2). Activity assays showed that both StCYP154C4-1 and StCYP154C4-2 can produce 2'-hydroxylated testosterone, which differs from the activity of a previously described NfCYP154C5 from Nocardia farcinica in terms of its 16alpha-hydroxylation of testosterone. To better understand the molecular basis of the regioselectivity of these two CYP154C4 proteins, crystal structures of the ligand-unbound form of StCYP154C4-1 and the testosterone-bound form of StCYP154C4-2 were determined. Comparison with the previously determined NfCYP154C5 structure revealed differences in the substrate-binding residues, suggesting a likely explanation for the different patterns of testosterone hydroxylation, despite the high sequence similarities between the enzymes (54% identity). These findings provide valuable insights that will enable protein engineering for the development of artificial steroid-related CYPs exhibiting different regiospecificity. Characterization of two steroid hydroxylases from different Streptomyces spp. and their ligand-bound and -unbound crystal structures.,Dangi B, Lee CW, Kim KH, Park SH, Yu EJ, Jeong CS, Park H, Lee JH, Oh TJ FEBS J. 2018 Dec 15. doi: 10.1111/febs.14729. PMID:30552795 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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