4niy

Crystal structure of trypsiligase (K60E/N143H/Y151H/D189K trypsin) complexed to YRH-ecotin (M84Y/M85R/A86H ecotin)

spinqualitylabelsall models 4niy, resolution 2.84Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4niy is a 8 chain structure with sequence from Bos taurus and Escherichia coli K-12. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.84Å Ligands: CA, ZN Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function TRY1_BOVIN Publication Abstract from PubMed Although site-specific incorporation of artificial functionalities into proteins is an important tool in both basic and applied research, it can be a major challenge to protein chemists. Enzymatic protein modification is an attractive goal due to the inherent regio- and stereoselectivity of enzymes, yet their specificity remains a problem. As a result of the intrinsic reversibility of enzymatic reactions, proteinases can in principle catalyze ligation reactions. While this makes them attractive tools for site-specific protein bioconjugation, competing hydrolysis reactions limits their general use. Here we describe the design and application of a highly specific trypsin variant for the selective modification of N-terminal residues of diverse proteins with various reagents. The modification proceeds quantitatively under native (aqueous) conditions. We show that the variant has a disordered zymogen-like activation domain, effectively suppressing the hydrolysis reaction, which is converted to an active conformation in the presence of appropriate substrates. N-Terminal Protein Modification by Substrate-Activated Reverse Proteolysis.,Liebscher S, Schopfel M, Aumuller T, Sharkhuukhen A, Pech A, Hoss E, Parthier C, Jahreis G, Stubbs MT, Bordusa F Angew Chem Int Ed Engl. 2014 Feb 12. doi: 10.1002/anie.201307736. PMID:24520050 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Ecotin Trypsin 3D structures

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