1ICE

STRUCTURE AND MECHANISM OF INTERLEUKIN-1BETA CONVERTING ENZYME

• PDB DOI: https://doi.org/10.2210/pdb1ICE/pdb

• Classification: HYDROLASE/HYDROLASE INHIBITOR
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 1994-09-29 Released: 1995-07-28 
• Deposition Author(s): Wilson, K.P., Griffith, J.P., Kim, E.E., Navia, M.A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Work: 0.190 
• R-Value Observed: 0.190 

Literature

Structure and mechanism of interleukin-1 beta converting enzyme.

Wilson, K.P., Black, J.A., Thomson, J.A., Kim, E.E., Griffith, J.P., Navia, M.A., Murcko, M.A., Chambers, S.P., Aldape, R.A., Raybuck, S.A.

(1994) Nature 370: 270-275

• PubMed: 8035875 
• DOI: https://doi.org/10.1038/370270a0
• Primary Citation of Related Structures:  
  1ICE


• PubMed Abstract: 
  

  Interleukin-1 beta converting enzyme (ICE) processes an inactive precursor to the proinflammatory cytokine, interleukin-1 beta, and may regulate programmed cell death in neuronal cells. The high-resolution structure of human ICE in complex with an inhibitor has been determined by X-ray diffraction. The structure confirms the relationship between human ICE and cell-death proteins in other organisms. The active site spans both the 10 and 20K subunits, which associate to form a tetramer, suggesting a mechanism for ICE autoactivation.

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Organizational Affiliation: 

Vertex Pharmaceuticals Incorporated, Cambridge, Massachusetts 02139.

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: 29.55 kDa 
• Atom Count: 2,096 
• Modelled Residue Count: 260 
• Deposited Residue Count: 260 
• Unique protein chains: 3

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
INTERLEUKIN-1 BETA CONVERTING ENZYME	A	167	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
TETRAPEPTIDE ALDEHYDE	B [auth T]	5	N/A	Mutation(s): 0

Entity ID: 3
Molecule	Chains	Sequence Length	Organism	Details	Image
INTERLEUKIN-1 BETA CONVERTING ENZYME	C [auth B]	88	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

Small Molecules

Modified Residues  1 Unique
ID	Chains	Type	Formula	2D Diagram	Parent
ASA	B [auth T]	L-PEPTIDE LINKING	C4 H7 N O3		ASP

Biologically Interesting Molecules (External Reference) 1 Unique

Entity ID: 2
ID	Chains	Name	Type/Class	2D Diagram	3D Interactions
PRD_000252	B [auth T]	Ac-Tyr-Val-Ala-Asp-Aldehyde	Peptide-like / Inhibitor

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.60 Å
• R-Value Work: 0.190 
• R-Value Observed: 0.190 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 64.4	α = 90
b = 64.4	β = 90
c = 163.3	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1995-07-28 
Deposition Author(s): Wilson, K.P., Griffith, J.P., Kim, E.E., Navia, M.A.

Revision History  

• Version 1.0: 1995-07-28
  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: 2012-12-12
  Changes: Other
• Version 1.4: 2024-06-05
  Changes: Data collection, Database references, Derived calculations, Other
• Version 1.5: 2024-10-23
  Changes: Structure summary