6HXA
AntI from P. luminescens catalyses terminal polyketide shortening in the biosynthesis of anthraquinones
Summary for 6HXA
| Entry DOI | 10.2210/pdb6hxa/pdb |
| Descriptor | AntI, TRIETHYLENE GLYCOL, TETRAETHYLENE GLYCOL, ... (4 entities in total) |
| Functional Keywords | natural product biosynthesis, type ii polyketide synthase system, lyase, alpha, beta-hydrolase fold, cascade reaction, retro claisen reaction, dieckmann condensation |
| Biological source | Photorhabdus luminescens |
| Total number of polymer chains | 1 |
| Total formula weight | 46125.54 |
| Authors | Zhou, Q.,Braeuer, A.,Grammbitter, G.,Schmalhofer, M.,Saura, P.,Adihou, H.,Kaila, V.R.I.,Groll, M.,Bode, H. (deposition date: 2018-10-16, release date: 2019-08-07, Last modification date: 2024-05-01) |
| Primary citation | Zhou, Q.,Brauer, A.,Adihou, H.,Schmalhofer, M.,Saura, P.,Grammbitter, G.L.C.,Kaila, V.R.I.,Groll, M.,Bode, H.B. Molecular mechanism of polyketide shortening in anthraquinone biosynthesis ofPhotorhabdus luminescens. Chem Sci, 10:6341-6349, 2019 Cited by PubMed Abstract: Anthraquinones, a widely distributed class of aromatic natural products, are produced by a type II polyketide synthase system in the Gram-negative bacterium . Heterologous expression of the anthraquinone biosynthetic gene cluster in identified AntI as an unusual lyase, catalysing terminal polyketide shortening prior to formation of the third aromatic ring. Functional and analysis of AntI using X-ray crystallography, structure-based mutagenesis, and molecular simulations revealed that AntI converts a defined octaketide to the tricyclic anthraquinone ring retro-Claisen and Dieckmann reactions. Thus, AntI catalyses a so far unobserved multistep reaction in this PKS system. PubMed: 31341589DOI: 10.1039/c9sc00749k PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (1.85 Å) |
Structure validation
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