2dko: Difference between revisions
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[[Image:2dko.gif|left|200px]] | [[Image:2dko.gif|left|200px]] | ||
'''Extended substrate recognition in caspase-3 revealed by high resolution X-ray structure analysis''' | {{Structure | ||
|PDB= 2dko |SIZE=350|CAPTION= <scene name='initialview01'>2dko</scene>, resolution 1.06Å | |||
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|LIGAND= | |||
|ACTIVITY= | |||
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'''Extended substrate recognition in caspase-3 revealed by high resolution X-ray structure analysis''' | |||
==Overview== | ==Overview== | ||
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==About this Structure== | ==About this Structure== | ||
2DKO is a [ | 2DKO is a [[Protein complex]] structure of sequences from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2DKO OCA]. | ||
==Reference== | ==Reference== | ||
Extended substrate recognition in caspase-3 revealed by high resolution X-ray structure analysis., Ganesan R, Mittl PR, Jelakovic S, Grutter MG, J Mol Biol. 2006 Jun 23;359(5):1378-88. Epub 2006 May 11. PMID:[http:// | Extended substrate recognition in caspase-3 revealed by high resolution X-ray structure analysis., Ganesan R, Mittl PR, Jelakovic S, Grutter MG, J Mol Biol. 2006 Jun 23;359(5):1378-88. Epub 2006 May 11. PMID:[http://www.ncbi.nlm.nih.gov/pubmed/16787777 16787777] | ||
[[Category: Homo sapiens]] | [[Category: Homo sapiens]] | ||
[[Category: Protein complex]] | [[Category: Protein complex]] | ||
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[[Category: tetrahedral intermediate]] | [[Category: tetrahedral intermediate]] | ||
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Mar 20 16:28:16 2008'' | ||
Revision as of 17:28, 20 March 2008
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| Coordinates: | save as pdb, mmCIF, xml | ||||||
Extended substrate recognition in caspase-3 revealed by high resolution X-ray structure analysis
OverviewOverview
Caspases are cysteine proteases involved in the signalling cascades of programmed cell death in which caspase-3 plays a central role, since it propagates death signals from intrinsic and extrinsic stimuli to downstream targets. The atomic resolution (1.06 Angstroms) crystal structure of the caspase-3 DEVD-cmk complex reveals the structural basis for substrate selectivity in the S4 pocket. A low-barrier hydrogen bond is observed between the side-chains of the P4 inhibitor aspartic acid and Asp179 of the N-terminal tail of the symmetry related p12 subunit. Site-directed mutagenesis of Asp179 confirmed the significance of this residue in substrate recognition. In the 1.06 Angstroms crystal structure, a radiation damage induced rearrangement of the inhibitor methylketone moiety was observed. The carbon atom that in a substrate would represent the scissile peptide bond carbonyl carbon clearly shows a tetrahedral coordination and resembles the postulated tetrahedral intermediate of the acylation reaction.
About this StructureAbout this Structure
2DKO is a Protein complex structure of sequences from Homo sapiens. Full crystallographic information is available from OCA.
ReferenceReference
Extended substrate recognition in caspase-3 revealed by high resolution X-ray structure analysis., Ganesan R, Mittl PR, Jelakovic S, Grutter MG, J Mol Biol. 2006 Jun 23;359(5):1378-88. Epub 2006 May 11. PMID:16787777
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