1D4B image
Deposition Date 1999-10-02
Release Date 1999-12-17
Last Version Date 2024-05-22
Entry Detail
PDB ID:
1D4B
Keywords:
APOPTOSIS
Title:
CIDE-N DOMAIN OF HUMAN CIDE-B
Biological Source:
Source Organism:
Homo sapiens (Taxon ID: 9606)
Host Organism:
Escherichia coli
Method Details:
Experimental Method:
SOLUTION NMR
Conformers Calculated:
30
Conformers Submitted:
15
Selection Criteria:
STRUCTURES WITH THE LEAST RESTRAINT VIOLATIONS,STRUCTURES WITH THE LOWEST ENERGY
1D4B validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:HUMAN CELL DEATH-INDUCING EFFECTOR B
Gene (Uniprot):CIDEB
Chain IDs:A
Chain Length:122
Number of Molecules:1
Biological Source:Homo sapiens
UniProt ID:Q9UHD4 Pfam ID:PF02017
Ligand Molecules
NA
Primary Citation
Solution structure of the CIDE-N domain of CIDE-B and a model for CIDE-N/CIDE-N interactions in the DNA fragmentation pathway of apoptosis.
Cell(Cambridge,Mass.) 99 747 755 (1999)
PMID: 10619428 DOI: 10.1016/S0092-8674(00)81672-4

Abstact

Apoptotic DNA fragmentation and chromatin condensation are mediated by the caspase-activated DFF40/ CAD nuclease, which is chaperoned and inhibited by DFF45/ICAD. CIDE proteins share a homologous regulatory CIDE-N domain with DFF40/CAD and DFF45/ ICAD. Here we report the solution structure of CIDE-N of human CIDE-B. We show that the CIDE-N of CIDE-B interacts with CIDE-N domains of both DFF40 and DFF45. The binding epitopes are similar and map to a highly charged bipolar surface region of CIDE-B. Furthermore, we demonstrate that the CIDE-N of CIDE-B regulates enzymatic activity of the DFF40/ DFF45 complex in vitro. Based on these results and mutagenesis data, we propose a model for the CIDE-N/ CIDE-N complex and discuss the role of this novel bipolar interaction in mediating downstream events of apoptosis.

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Primary Citation of related structures
1D4B