1IBC

CRYSTAL STRUCTURE OF INHIBITED INTERLEUKIN-1BETA CONVERTING ENZYME

• PDB DOI: https://doi.org/10.2210/pdb1IBC/pdb

• Classification: HYDROLASE/HYDROLASE INHIBITOR
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 1997-02-12 Released: 1998-02-11 
• Deposition Author(s): Becker, J.W., Rotonda, J.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.73 Å
• R-Value Free: 0.285 
• R-Value Work: 0.173 
• R-Value Observed: 0.173 

Literature

A combinatorial approach for determining protease specificities: application to interleukin-1beta converting enzyme (ICE).

Rano, T.A., Timkey, T., Peterson, E.P., Rotonda, J., Nicholson, D.W., Becker, J.W., Chapman, K.T., Thornberry, N.A.

(1997) Chem Biol 4: 149-155

• PubMed: 9190289 
• DOI: https://doi.org/10.1016/s1074-5521(97)90258-1
• Primary Citation of Related Structures:  
  1IBC


• PubMed Abstract: 
  

  Interleukin-1beta converting enzyme (ICE/caspase-1) is the protease responsible for interleukin-1beta (IL-1beta) production in monocytes. It was the first member of a new cysteine protease family to be identified. Members of this family have functions in both inflammation and apoptosis.

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Organizational Affiliation: 

Department of Molecular Design and Diversity, Merck Research Laboratories, R123-232, PO Box 2000, Rahway, New Jersey 07065, USA.

Biological Assembly 1  

Global Symmetry: Cyclic - C2  (Explore in 3D)
Global Stoichiometry: Hetero 6-mer - A2B2C2 Pseudo Symmetry: Asymmetric - C1 
Pseudo Stoichiometry: Hetero 6-mer - A2B2C1D1 

Biological assembly 1 assigned by authors and generated by PISA,PQS (software)

Macromolecule Content

• Total Structure Weight: 32.29 kDa 
• Atom Count: 2,111 
• Modelled Residue Count: 260 
• Deposited Residue Count: 287 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
INTERLEUKIN-1BETA CONVERTING ENZYME	A	194	Homo sapiens	Mutation(s): 0  EC: 3.4.22.36
UniProt & NIH Common Fund Data Resources
Find proteins for P29466 (Homo sapiens) Explore P29466  Go to UniProtKB:  P29466
PHAROS:  P29466 GTEx:  ENSG00000137752

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
INTERLEUKIN-1BETA CONVERTING ENZYME	B	88	Homo sapiens	Mutation(s): 1  EC: 3.4.22.36
UniProt & NIH Common Fund Data Resources
Find proteins for P29466 (Homo sapiens) Explore P29466  Go to UniProtKB:  P29466
PHAROS:  P29466 GTEx:  ENSG00000137752

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
PEPTIDE ACE-TRP-GLU-HIS-ASA	C	5	N/A	Mutation(s): 0

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
ASA	C	L-PEPTIDE LINKING	C4 H7 N O3		ASP

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.73 Å
• R-Value Free: 0.285 
• R-Value Work: 0.173 
• R-Value Observed: 0.173 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 64.61	α = 90
b = 64.61	β = 90
c = 160.1	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
SAINT	data reduction
SAINT	data scaling
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1998-02-11 
Deposition Author(s): Becker, J.W., Rotonda, J.

Revision History  

• Version 1.0: 1998-02-11
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Atomic model, Database references, Derived calculations, Non-polymer description, Structure summary, Version format compliance
• Version 1.3: 2011-11-16
  Changes: Atomic model
• Version 1.4: 2017-11-29
  Changes: Derived calculations, Other
• Version 1.5: 2021-11-03
  Changes: Database references, Derived calculations
• Version 1.6: 2024-04-03
  Changes: Data collection, Refinement description