7cz3

Crystal strcuture of Acyl-CoA thioesterase from Bacillus cereus ATCC 14579

spinqualitylabelsall models 7cz3, resolution 2.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 7cz3 is a 6 chain structure with sequence from Bacillus cereus ATCC 14579. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.9Å Ligands: COA Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q814K4_BACCR Publication Abstract from PubMed Acyl-CoA thioesterase is an enzyme that catalyzes the cleavage of thioester bonds and regulates the cellular concentrations of CoASH, fatty acids, and acyl-CoA. In this study, we report the crystal structure of acyl-CoA thioesterase from Bacillus cereus ATCC 14579 (BcACT1) complexed with the CoA product. BcACT1 possesses a monomeric structure of a hotdog-fold and forms a hexamer via the trimerization of three dimers. We identified the active site of BcACT1 and revealed that residues Asn23 and Asp38 are crucial for enzyme catalysis, indicating that BcACT1 belongs to the TE6 family. We also propose that BcACT1 might undergo an open-closed conformational change on the acyl-CoA binding pocket upon binding of the acyl-CoA substrate. Interestingly, the BcACT1 variants with dramatically increased activities were obtained during the site-directed mutagenesis experiments to confirm the residues involved in CoA binding. Finally, we found that BcACT1 is not nucleotide-regulated and suggest that the length and shape of the additional alpha2-helix are crucial in determining a regulation mode by nucleotides. Structural basis for nucleotide-independent regulation of acyl-CoA thioesterase from Bacillus cereus ATCC 14579.,Park J, Kim YJ, Lee D, Kim KJ Int J Biol Macromol. 2020 Dec 28;170:390-396. doi:, 10.1016/j.ijbiomac.2020.12.174. PMID:33383082 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Thioesterase 3D structures

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