5ng7

Novel epoxide hydrolases belonging to the alpha/beta hydrolases superfamily in metagenomes from hot environments

spinqualitylabelsall models 5ng7, resolution 1.39Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5ng7 is a 2 chain structure with sequence from Metagenome. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.39Å Ligands: CL, EDO, PEG, SER Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Publication Abstract from PubMed Two novel epoxide hydrolases (EHs), Sibe-EH and CH65-EH, were identified in the metagenomes of samples collected in hot springs in Russia and China, respectively. The two alpha/beta hydrolase superfamily fold enzymes were cloned, over-expressed in Escherichia coli, purified and characterized. The new EHs were active toward a broad range of substrates, and in particular, Sibe-EH was excellent in the desymmetrization of cis-2,3-epoxybutane producing the (2R,3R)-diol product with ee exceeding 99%. Interestingly these enzymes also hydrolyse (4R)-limonene-1,2-epoxide with Sibe-EH being specific for the trans isomer. The Sibe-EH is a monomer in solution whereas the CH65-EH is a dimer. Both enzymes showed high melting temperatures with the CH65-EH being the highest at 85 degrees C retaining 80% of its initial activity after 3 h thermal treatment at 70 degrees C making it the most thermal tolerant wild type epoxide hydrolase described. The Sibe-EH and CH65-EH have been crystallized and their structures determined to high resolution, 1.6 and 1.4 A, respectively. The CH65-EH enzyme forms a dimer via its cap domains with different relative orientation of the monomers compared to previously described EHs. The entrance to the active site cavity is located in a different position in CH65-EH and Sibe-EH in relation to other known bacterial and mammalian EHs. New Thermophilic alpha/beta Class Epoxide Hydrolases Found in Metagenomes From Hot Environments.,Ferrandi EE, Sayer C, De Rose SA, Guazzelli E, Marchesi C, Saneei V, Isupov MN, Littlechild JA, Monti D Front Bioeng Biotechnol. 2018 Oct 16;6:144. doi: 10.3389/fbioe.2018.00144., eCollection 2018. PMID:30386778 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Epoxide hydrolase 3D structures

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