Macromolecule Content

• Total Structure Weight: 10.02 kDa 
• Atom Count: 696 
• Residue Count: 89 
• Unique protein chains: 1

1DGN

SOLUTION STRUCTURE OF ICEBERG, AN INHIBITOR OF INTERLEUKIN-1BETA GENERATION

• DOI: 10.2210/pdb1DGN/pdb

• Classification: HYDROLASE INHIBITOR
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1999-11-24 Released: 2000-10-09 
• Deposition Author(s): Humke, E.W., Shriver, S.K., Starovasnik, M.A., Fairbrother, W.J., Dixit, V.M.

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Experimental Data Snapshot

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 

Literature

ICEBERG: a novel inhibitor of interleukin-1beta generation.

Humke, E.W., Shriver, S.K., Starovasnik, M.A., Fairbrother, W.J., Dixit, V.M.

(2000) Cell 103: 99-111

• PubMed: 11051551 
• DOI: 10.1016/s0092-8674(00)00108-2
• Primary Citation of Related Structures:  
  1DGN


• PubMed Abstract: 
  

ProIL-1beta is a proinflammatory cytokine that is proteolytically processed to its active form by caspase-1. Upon receipt of a proinflammatory stimulus, an upstream adaptor, RIP2, binds and oligomerizes caspase-1 zymogen, promoting its autoactivation. ICEBERG is a novel protein that inhibits generation of IL-1beta by interacting with caspase-1 and preventing its association with RIP2. ICEBERG is induced by proinflammatory stimuli, suggesting that it may be part of a negative feedback loop. Consistent with this, enforced retroviral expression of ICEBERG inhibits lipopolysaccharide-induced IL-1beta generation. The structure of ICEBERG reveals it to be a member of the death-domain-fold superfamily. The distribution of surface charge is complementary to the homologous prodomain of caspase-1, suggesting that charge-charge interactions mediate binding of ICEBERG to the prodomain of caspase-1.

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Organizational Affiliation: 

Department of Cellular and Molecular Biology, University of Michigan Medical School, Ann Arbor 48109, USA.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ICEBERG (PROTEASE INHIBITOR)	A	89	Homo sapiens	Mutation(s): 0  Gene Names: CARD18, ICEBERG, UNQ5804/PRO19611
Find proteins for P57730 (Homo sapiens) Explore P57730  Go to UniProtKB:  P57730
NIH Common Fund Data Resources
PHAROS  P57730 GTEx  ENSG00000255501

Experimental Data & Validation

Experimental Data

• Method: SOLUTION NMR
• Conformers Calculated: 50 
• Conformers Submitted: 20 
• Selection Criteria: structures with the least restraint violations 
• OLDERADO: 1DGN Olderado

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1999-11-24 
• Released Date: 2000-10-09 
Deposition Author(s): Humke, E.W., Shriver, S.K., Starovasnik, M.A., Fairbrother, W.J., Dixit, V.M.

Revision History 

• Version 1.0: 2000-10-09
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance