1IBX

NMR STRUCTURE OF DFF40 AND DFF45 N-TERMINAL DOMAIN COMPLEX


Experimental Data Snapshot

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the least restraint violations 

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This is version 1.2 of the entry. See complete history


Literature

Solution structure of DFF40 and DFF45 N-terminal domain complex and mutual chaperone activity of DFF40 and DFF45.

Zhou, P.Lugovskoy, A.A.McCarty, J.S.Li, P.Wagner, G.

(2001) Proc Natl Acad Sci U S A 98: 6051-6055

  • DOI: 10.1073/pnas.111145098
  • Primary Citation of Related Structures:  
    1IBX

  • PubMed Abstract: 
  • Apoptotic DNA fragmentation is mediated by a caspase-activated DNA fragmentation factor (DFF)40. Expression and folding of DFF40 require the presence of DFF45, which also acts as a nuclease inhibitor before DFF40 activation by execution caspases. The N-terminal domains (NTDs) of both proteins are homologous, and their interaction plays a key role in the proper functioning of this two-component system ...

    Apoptotic DNA fragmentation is mediated by a caspase-activated DNA fragmentation factor (DFF)40. Expression and folding of DFF40 require the presence of DFF45, which also acts as a nuclease inhibitor before DFF40 activation by execution caspases. The N-terminal domains (NTDs) of both proteins are homologous, and their interaction plays a key role in the proper functioning of this two-component system. Here we report that the NTD of DFF45 alone is unstructured in solution, and its folding is induced upon binding to DFF40 NTD. Therefore, folding of both proteins regulates the formation of the DFF40/DFF45 complex. The solution structure of the heterodimeric complex between NTDs of DFF40 and DFF45 reported here shows that the mutual chaperoning includes the formation of an extensive network of intermolecular interactions that bury a hydrophobic cluster inside the interface, surrounded by intermolecular salt bridges.


    Organizational Affiliation

    Department of Biological Chemistry and Molecular Pharmacology, Harvard Medical School, Boston, MA 02115, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
DNA FRAGMENTATION FACTOR 40A86Homo sapiensMutation(s): 0 
Gene Names: DFF40DFFBCADDFF2
EC: 3
Find proteins for O76075 (Homo sapiens)
Explore O76075 
Go to UniProtKB:  O76075
NIH Common Fund Data Resources
PHAROS:  O76075
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
CHIMERA OF IGG BINDING PROTEIN G AND DNA FRAGMENTATION FACTOR 45B145Streptococcus sp.Homo sapiens
This entity is chimeric
Mutation(s): 1 
Gene Names: DFF45
Find proteins for O00273 (Homo sapiens)
Explore O00273 
Go to UniProtKB:  O00273
NIH Common Fund Data Resources
PHAROS:  O00273
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: SOLUTION NMR
  • Conformers Calculated: 30 
  • Conformers Submitted: 10 
  • Selection Criteria: structures with the least restraint violations 
  • OLDERADO: 1IBX Olderado

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2001-05-02
    Type: Initial release
  • Version 1.1: 2008-04-27
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance