4aor | pdb_00004aor

Cationic trypsin in complex with the Spinacia oleracea trypsin inhibitor III (SOTI-III)

spinqualitylabelsall models 4aor, resolution 1.70Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 4aor is a 6 chain structure with sequence from Bos taurus and Spinacia oleracea. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 1.702Å Ligands: CA, CL, GOL, IMD, MES Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function TRY1_BOVIN Publication Abstract from PubMed In recent decades, several canonical serine protease inhibitor families have been classified and characterized. In contrast to most trypsin inhibitors, those from garden four o'clock (Mirabilis jalapa) and spinach (Spinacia oleracea) do not share sequence similarity and have been proposed to form the new Mirabilis serine protease inhibitor family. These 30-40-amino-acid inhibitors possess a defined disulfide-bridge topology and belong to the cystine-knot miniproteins (knottins). To date, no atomic structure of this inhibitor family has been solved. Here, the first structure of S. oleracea trypsin inhibitor III (SOTI-III), in complex with bovine pancreatic trypsin, is reported. The inhibitor was synthesized by solid-phase peptide synthesis on a multi-milligram scale and was assayed to test its inhibitory activity and binding properties. The structure confirmed the proposed cystine-bridge topology. The structural features of SOTI-III suggest that it belongs to a new canonical serine protease inhibitor family with promising properties for use in protein-engineering and medical applications. Structural characterization of Spinacia oleracea trypsin inhibitor III (SOTI-III).,Glotzbach B, Schmelz S, Reinwarth M, Christmann A, Heinz DW, Kolmar H Acta Crystallogr D Biol Crystallogr. 2013 Jan;69(Pt 1):114-20. doi:, 10.1107/S0907444912043880. Epub 2012 Dec 20. PMID:23275169 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Trypsin 3D structures Trypsin inhibitor 3D structures

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