6cuz

Engineered TrpB from Pyrococcus furiosus, PfTrpB7E6 with (2S,3R)-ethylserine bound as the amino-acrylate

spinqualitylabelsall models 6cuz, resolution 1.75Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6cuz is a 4 chain structure with sequence from Pyrococcus furiosus DSM 3638. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.75Å Ligands: FEV, LLP, NA, PO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function TRPB1_PYRFU The beta subunit is responsible for the synthesis of L-tryptophan from indole and L-serine (By similarity). Publication Abstract from PubMed Non-canonical amino acids (ncAAs) with dual stereocenters at the alpha and beta positions are valuable precursors to natural products and therapeutics. Despite the potential applications of such bioactive beta-branched ncAAs, their availability is limited due to the inefficiency of the multi-step methods used to prepare them. Here we report a stereoselective biocatalytic synthesis of beta-branched tryptophan analogs using an engineered variant of Pyrococcus furiosus tryptophan synthase (PfTrpB), PfTrpB7E6. PfTrpB7E6 is the first biocatalyst to synthesize bulky beta-branched tryptophan analogs in a single step, with demonstrated access to 27 ncAAs. The molecular basis for the efficient catalysis and broad substrate tolerance of PfTrpB7E6 was explored through X-ray crystallography and UV-visible light spectroscopy, which revealed that a combination of active-site and remote mutations increase the abundance and persistence of a key reactive intermediate. PfTrpB7E6 provides an operationally simple and environmentally benign platform for preparation of beta-branched tryptophan building blocks. Engineered biosynthesis of beta-alkyl tryptophan analogs.,Boville CE, Scheele RA, Koch P, Brinkmann-Chen S, Buller AR, Arnold FH Angew Chem Int Ed Engl. 2018 Sep 14. doi: 10.1002/anie.201807998. PMID:30215880 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Tryptophan synthase 3D structures

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