1rhm: Difference between revisions

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[[Image:1rhm.gif|left|200px]]
{{Seed}}
[[Image:1rhm.png|left|200px]]


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{{STRUCTURE_1rhm|  PDB=1rhm  |  SCENE=  }}  
{{STRUCTURE_1rhm|  PDB=1rhm  |  SCENE=  }}  


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




==Overview==
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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.
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{{ABSTRACT_PUBMED_15115390}}


==About this Structure==
==About this Structure==
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[[Category: Cysteine protease]]
[[Category: Cysteine protease]]
[[Category: Yama]]
[[Category: Yama]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May  3 07:30:34 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 09:17:46 2008''

Revision as of 06:17, 28 July 2008

File:1rhm.png

Template:STRUCTURE 1rhm

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

Template:ABSTRACT PUBMED 15115390

About this Structure

1RHM is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.

Reference

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

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