6qsp

Ketosynthase (ApeO) in Complex with its Chain Length Factor (ApeC) from Xenorhabdus doucetiae

spinqualitylabelsall models 6qsp, resolution 1.45Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6qsp is a 2 chain structure with sequence from Xenorhabdus doucetiae. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.45Å Ligands: GOL, PO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A068QVX9_9GAMM Publication Abstract from PubMed Aryl polyene (APE) pigments are a widely distributed class of bacterial polyketides. So far, little is known about the biosynthesis of these compounds, which are produced by a novel type II polyketide synthase (PKS). We have identi-fied all enzymes involved in APE biosynthesis and determined their peculiar functions. The biosynthesis was recon-stituted in vitro and ACP-bound intermediates were assigned for each reaction step by HPLC-MS. Native mass spec-trometry experiments identified four stable complexes: the acyl-carrier proteins ApeE and ApeF bound to the thi-oesterase ApeK, the dehydratases ApeI and ApeP as well as the ketosynthase ApeO in complex with its chain-length factor ApeC. X-ray structures of the heterodimeric ApeO:ApeC and ApeI:ApeP complexes depict striking protein-protein interactions. Altogether, our study elucidated mechanistic aspects of APE biosynthesis that unifies elements of type II fatty acid and PKS systems, but in addition includes novel enzyme complexes. An Uncommon Type II PKS Catalyzes Biosynthesis of Aryl Polyene Pigments.,Grammbitter GLC, Schmalhofer M, Karimi K, Schoner TA, Tobias NJ, Morgner N, Groll M, Bode HB J Am Chem Soc. 2019 Mar 25. doi: 10.1021/jacs.8b10776. PMID:30908039 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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