4PRZ

Caspase-8 specific unnatural amino acid peptides


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.12 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.191 

wwPDB Validation 3D Report Full Report



Literature

Selective inhibition of initiator versus executioner caspases using small peptides containing unnatural amino acids.

Vickers, C.J.Gonzalez-Paez, G.E.Litwin, K.M.Umotoy, J.C.Coutsias, E.A.Wolan, D.W.

(2014) ACS Chem Biol 9: 2194-2198

  • DOI: 10.1021/cb5004256
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Caspases are fundamental to many essential biological processes, including apoptosis, differentiation, and inflammation. Unregulated caspase activity is also implicated in the development and progression of several diseases, such as cancer, neurodege ...

    Caspases are fundamental to many essential biological processes, including apoptosis, differentiation, and inflammation. Unregulated caspase activity is also implicated in the development and progression of several diseases, such as cancer, neurodegenerative disorders, and sepsis. Unfortunately, it is difficult to determine exactly which caspase(s) of the 11 isoforms that humans express is responsible for specific biological functions. This lack of resolution is primarily due to highly homologous active sites and overlapping substrates. Currently available peptide-based inhibitors and probes are based on specificity garnered from peptide substrate libraries. For example, the canonical tetrapeptide LETD was discovered as the canonical sequence that is optimally recognized by caspase-8; however, LETD-based inhibitors and substrates promiscuously bind to other isoforms with equal affinity, including caspases-3, -6, and -9. In order to mitigate this problem, we report the identification of a new series of compounds that are >100-fold selective for inhibiting the initiator caspases-8 and -9 over the executioner caspases-3, -6, and -7.


    Organizational Affiliation

    Departments of Molecular and Experimental Medicine and Chemical Physiology, The Scripps Research Institute , La Jolla, California 92037, United States.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Caspase-8A275Homo sapiensMutation(s): 0 
Gene Names: CASP8CASP8 MCH5MCH5
EC: 3.4.22.61
Find proteins for Q14790 (Homo sapiens)
Explore Q14790 
Go to UniProtKB:  Q14790
NIH Common Fund Data Resources
PHAROS  Q14790
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by: Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
(ACE)LET(1U8) PEPTIDEB5N/AMutation(s): 0 
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
DTD
Query on DTD

Download CCD File 
A
DITHIANE DIOL
C4 H8 O2 S2
YPGMOWHXEQDBBV-IMJSIDKUSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.12 Å
  • R-Value Free: 0.218 
  • R-Value Work: 0.190 
  • R-Value Observed: 0.191 
  • Space Group: P 31 2 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 62.145α = 90
b = 62.145β = 90
c = 129.383γ = 120
Software Package:
Software NamePurpose
HKL-2000data collection
SOLVEphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2015-01-21
    Type: Initial release