5qby | pdb_00005qby

Crystal structure of human Cathepsin-S with bound ligand

spinqualitylabelsall models 5qby, resolution 2.25Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 5qby is a 2 chain structure with sequence from Homo sapiens. This structure supersedes the now removed PDB entry 3mpe. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 2.25Å Ligands: N2A Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function CATS_HUMAN Thiol protease. Key protease responsible for the removal of the invariant chain from MHC class II molecules. The bond-specificity of this proteinase is in part similar to the specificities of cathepsin L and cathepsin N. Publication Abstract from PubMed A pyridazin-4-one fragment 4 (hCatS IC(50)=170 microM) discovered through Tethering was modeled into cathepsin S and predicted to overlap in S2 with the tetrahydropyridinepyrazole core of a previously disclosed series of CatS inhibitors. This fragment served as a template to design pyridazin-3-one 12 (hCatS IC(50)=430 nM), which also incorporates P3 and P5 binding elements. A crystal structure of 12 bound to Cys25Ser CatS led to the synthesis of the potent diazinone isomers 22 (hCatS IC(50)=60 nM) and 27 (hCatS IC(50)=40 nM). Diazinones as P2 replacements for pyrazole-based cathepsin S inhibitors.,Ameriks MK, Bembenek SD, Burdett MT, Choong IC, Edwards JP, Gebauer D, Gu Y, Karlsson L, Purkey HE, Staker BL, Sun S, Thurmond RL, Zhu J Bioorg Med Chem Lett. 2010 Jul 15;20(14):4060-4. Epub 2010 May 25. PMID:20541404 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Cathepsin 3D structures

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