1rhm

CRYSTAL STRUCTURE OF THE COMPLEX OF CASPASE-3 WITH A NICOTINIC ACID ALDEHYDE INHIBITORCRYSTAL STRUCTURE OF THE COMPLEX OF CASPASE-3 WITH A NICOTINIC ACID ALDEHYDE INHIBITOR

Structural highlights 1rhm is a 4 chain structure with sequence from Homo sapiens. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Ligands: Related: 1pau, 1rhj, 1rhk, 1rhq, 1rhr, 1rhu Gene: CASP3, CPP32 (Homo sapiens) Resources: FirstGlance, OCA, RCSB, PDBsum 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 Caspases are cysteine proteases that specifically cleave Asp-Xxx bonds. They are key agents in inflammation and apoptosis and are attractive targets for therapy against inflammation, neurodegeneration, ischemia, and cancer. Many caspase structures are known, but most involve either peptide or protein inhibitors, unattractive candidates for drug development. We present seven crystal structures of inhibited caspase-3 that illustrate several approaches to reducing the peptidyl characteristics of the inhibitors while maintaining their potency and selectivity. The inhibitors reduce the peptidyl nature of inhibitors while preserving binding potency by (1). exploiting a hydrophobic binding site C-terminal to the cleavage site, (2). replacing the negatively charged aspartyl residue at P4 with neutral groups, and (3). using a peptidomimetic 5,6,7-tricyclic system or a pyrazinone at P2-P3. In addition, we have found that two nicotinic acid aldehydes induce a significant conformational change in the S2 and S3 subsites of caspase-3, revealing an unexpected binding mode. These results advance the search for caspase-directed drugs by revealing how unacceptable molecular features can be removed without loss of potency. Reducing the peptidyl features of caspase-3 inhibitors: a structural analysis.,Becker JW, Rotonda J, Soisson SM, Aspiotis R, Bayly C, Francoeur S, Gallant M, Garcia-Calvo M, Giroux A, Grimm E, Han Y, McKay D, Nicholson DW, Peterson E, Renaud J, Roy S, Thornberry N, Zamboni R J Med Chem. 2004 May 6;47(10):2466-74. PMID:15115390 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See Also Caspase

spinqualitylabelsall models 1rhm, resolution 2.50Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image