5n02

Crystal structure of the decarboxylase AibA/AibB C56S variant

spinqualitylabelsall models 5n02, resolution 1.90Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5n02 is a 4 chain structure with sequence from Myxococcus xanthus DK 1622. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.9Å Ligands: ACT Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function Q1D4I4_MYXXD Publication Abstract from PubMed Isovaleryl coenzyme A (IV-CoA) is an important precursor for iso-fatty acids and lipids. It acts in the development of myxobacteria, which can produce this compound from acetyl-CoA through alternative IV-CoA biosynthesis (aib). A central reaction of aib is catalyzed by AibA/AibB, which acts as a cofactor-free decarboxylase despite belonging to the family of CoA-transferases. We developed an efficient expression system for AibA/AibB that allowed the determination of high-resolution crystal structures in complex with different ligands. Through mutational studies, we show that an active-site cysteine previously proposed to be involved in decarboxylation is not required for activity. Instead, AibA/AibB seems to induce an intramolecular decarboxylation by binding its substrate in a hydrophobic cavity and forcing it into a bent conformation. Our study opens opportunities for synthetic biology studies, since AibA/AibB may be suitable for the production of isobutene, a precursor of biofuels and chemicals. AibA/AibB Induces an Intramolecular Decarboxylation in Isovalerate Biosynthesis by Myxococcus xanthus.,Bock T, Luxenburger E, Hoffmann J, Schutza V, Feiler C, Muller R, Blankenfeldt W Angew Chem Int Ed Engl. 2017 Aug 7;56(33):9986-9989. doi: 10.1002/anie.201701992., Epub 2017 May 16. PMID:28508504 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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