1fn8 | pdb_00001fn8

FUSARIUM OXYSPORUM TRYPSIN AT ATOMIC RESOLUTION

spinqualitylabelsall models 1fn8, resolution 0.81Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 1fn8 is a 2 chain structure with sequence from Fusarium oxysporum. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 0.81Å Ligands: GOL, SO4 Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function TRYP_FUSOX Evolutionary Conservation Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf. Publication Abstract from PubMed The X-ray structure of F. oxysporum trypsin has been determined at atomic resolution, revealing electron density in the binding site which was interpreted as a peptide bound in the sites S1, S2 and S3. The structure, which was initially determined at 1.07 A resolution and 283 K, has an Arg in the S1 specificity pocket. The study was extended to 0.81 A resolution at 100 K using crystals soaked in Arg, Lys and Gln to study in greater detail the binding at the S1 site. The electron density in the binding site was compared between the different structures and analysed in terms of partially occupied and overlapping components of peptide, solvent water and possibly other chemical moieties. Arg-soaked crystals reveal a density more detailed but similar to the original structure, with the Arg side chain visible in the S1 pocket and residual peptide density in the S2 and S3 sites. The density in the active site is complex and not fully interpreted. Lys at high concentrations displaces Arg in the S1 pocket, while some main-chain density remains in sites S2 and S3. Gln has been shown not to bind. The free peptide in the S1-S3 sites binds in a similar way to the binding loop of BPTI or the inhibitory domain of the Alzheimer's beta-protein precursor, with some differences in the S1 site. Fusarium oxysporum trypsin at atomic resolution at 100 and 283 K: a study of ligand binding.,Rypniewski WR, Ostergaard PR, Norregaard-Madsen M, Dauter M, Wilson KS Acta Crystallogr D Biol Crystallogr. 2001 Jan;57(Pt 1):8-19. PMID:11134922 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Trypsin 3D structures

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