Summary: CIDE-N domain
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CIDE-N domain Provide feedback
Enari M, Sakahira H, Yokoyama H, Okawa K, Iwamatsu A, Nagata S; , Nature 1998;391:43-50.: A caspase-activated DNase that degrades DNA during apoptosis, and its inhibitor ICAD [see comments] [published erratum appears in Nature 1998 May 28;393(6683):396] PUBMED:9422506 EPMC:9422506
Lugovskoy AA, Zhou P, Chou JJ, McCarty JS, Li P, Wagner G; , Cell 1999;99:747-755.: 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 [In Process Citation] PUBMED:10619428 EPMC:10619428
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|Similarity to PfamA using HHSearch:||KHA|
External database links
This tab holds annotation information from the InterPro database.
InterPro entry IPR003508
The CIDE-N or CAD domain is a ~78 amino acid protein-protein interaction domain in the N-terminal part of Cell death-Inducing DFF45-like Effector (CIDE) proteins, involved in apoptosis. At the final stage of programmed cell death, chromosomal DNA is degraded into fragments by Caspase-activated DNase (CAD), also named DNA fragmentation factor 40 kDa (DFF40). In normal cells CAD/DFF40 is completely inhibited by its binding to DFF45 or Inhibitor of CAD (ICAD). Apoptotic stimuli provoke cleavage of ICAD/DFF45 by caspases, resulting in self-assembly of CAD/DFF40 into the active dimer [PUBMED:15149602].
Both CAD/DFF40 and ICAD/DFF45 possess an N-terminal CIDE-N domain that is involved in their interaction. The name of the CIDE-N domain refers to the CIDE proteins and CAD, where the domain forms the N-terminal part [PUBMED:9564035, PUBMED:10619428]. The CIDE-N domains from different proteins can interact, e.g. CIDE-N of CIDE-B and ICAD/DFF45 with CIDE-N of CAD/DFF40, and such interactions can also be needed for proper folding [PUBMED:10764577, PUBMED:11371636].
Tertiary structures show that the CIDE-N domain forms an alpha/beta roll fold of five beta-strands forming a single, mixed parallel/anti-parallel beta-sheet with one [PUBMED:10764577] or two [PUBMED:10619428, PUBMED:11371636] alpha-helices packed against the sheet. Binding surfaces of the CIDE-N domain form a central hydrophobic cluster, while specific binding interfaces can be formed by charged patches.
Some proteins known to contain a CIDE-N domain include:
- Mammalian DNA fragmentation factor 40 kDa (DFF40) or Caspase-activated deoxyribonuclease (CAD), an endonuclease that induces DNA fragmentation and chromatin condensation during apoptosis. The degradation of chromosomal DNA by CAD/DFF40 will kill the cells.
- Mammalian DNA fragmentation factor 45 kDa (DFF45) or Inhibitor of CAD (ICAD), which controls the activity and proper folding of CAD/DFF40.
- Mammalian CIDE-A and CIDE-B, activators of cell death and DNA fragmentation that can be inhibited by ICAD/DFF45. In contrast with CAD and ICAD, the CIDE proteins are expressed in a highly restricted way and show pronounced tissue specificity.
- Fruit fly DNAation factor DREP1, a DFF45 homologue that can inhibit CIDE-A-induced apoptosis.
The mapping between Pfam and Gene Ontology is provided by InterPro. If you use this data please cite InterPro.
|Cellular component||intracellular (GO:0005622)|
|Biological process||apoptotic process (GO:0006915)|
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This family includes proteins that share the ubiquitin fold. It currently unites four SCOP superfamilies.
The clan contains the following 40 members:APG12 Atg8 Blt1 Caps_synth_GfcC CIDE-N Cobl DUF2407 DUF4430 DWNN FERM_N Lambda_tail_I Multi_ubiq NQRA_SLBB PB1 PI3K_rbd Plug Prok_Ub RA Rad60-SLD Rad60-SLD_2 Ras_bdg_2 RBD SLBB Telomere_Sde2 TGS ThiS ThiS-like TmoB TUG-UBL1 Ub-Mut7C Ub-RnfH ubiquitin Ubiquitin_2 Ubiquitin_3 UBX Ufm1 UN_NPL4 Urm1 YchF-GTPase_C YukD
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Curation and family details
|Number in seed:||100|
|Number in full:||552|
|Average length of the domain:||73.30 aa|
|Average identity of full alignment:||38 %|
|Average coverage of the sequence by the domain:||24.20 %|
|HMM build commands:||
build method: hmmbuild -o /dev/null HMM SEED
search method: hmmsearch -Z 80369284 -E 1000 --cpu 4 HMM pfamseq
|Family (HMM) version:||11|
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There is 1 interaction for this family. More...
For those sequences which have a structure in the Protein DataBank, we use the mapping between UniProt, PDB and Pfam coordinate systems from the PDBe group, to allow us to map Pfam domains onto UniProt sequences and three-dimensional protein structures. The table below shows the structures on which the CIDE-N domain has been found. There are 10 instances of this domain found in the PDB. Note that there may be multiple copies of the domain in a single PDB structure, since many structures contain multiple copies of the same protein seqence.
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