1Q4Q

Crystal structure of a DIAP1-Dronc complex

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.203 

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This is version 1.3 of the entry. See complete history. 


Literature

Molecular mechanism of Reaper-Grim-Hid-mediated suppression of DIAP1-dependent Dronc ubiquitination

Chai, J., Yan, N., Huh, J.R., Wu, J.-W., Li, W., Hay, B.A., Shi, Y.

(2003) Nat Struct Biol 10: 892-898

  • DOI: 10.1038/nsb989
  • Primary Citation of Related Structures:  
    1Q4Q

  • PubMed Abstract: 

    • The inhibitor of apoptosis protein DIAP1 inhibits Dronc-dependent cell death by ubiquitinating Dronc. The pro-death proteins Reaper, Hid and Grim (RHG) promote apoptosis by antagonizing DIAP1 function. Here we report the structural basis of Dronc recognition by DIAP1 as well as a novel mechanism by which the RHG proteins remove DIAP1-mediated downregulation of Dronc ...

    The inhibitor of apoptosis protein DIAP1 inhibits Dronc-dependent cell death by ubiquitinating Dronc. The pro-death proteins Reaper, Hid and Grim (RHG) promote apoptosis by antagonizing DIAP1 function. Here we report the structural basis of Dronc recognition by DIAP1 as well as a novel mechanism by which the RHG proteins remove DIAP1-mediated downregulation of Dronc. Biochemical and structural analyses revealed that the second BIR (BIR2) domain of DIAP1 recognizes a 12-residue sequence in Dronc. This recognition is essential for DIAP1 binding to Dronc, and for targeting Dronc for ubiquitination. Notably, the Dronc-binding surface on BIR2 coincides with that required for binding to the N termini of the RHG proteins, which competitively eliminate DIAP1-mediated ubiquitination of Dronc. These observations reveal the molecular mechanisms of how DIAP1 recognizes Dronc, and more importantly, how the RHG proteins remove DIAP1-mediated ubiquitination of Dronc.

    Organizational Affiliation: 

    Department of Molecular Biology, Princeton University, Lewis Thomas Laboratory, Washington Road, Princeton, New Jersey 08544, USA.



Macromolecules
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(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Apoptosis 1 inhibitorA, B, C, D, E, F, G, H, A,  B,  C,  D,  E,  F,  G,  H,  I,  J
124Drosophila melanogasterMutation(s): 0 
Gene Names: Diap1, Iap1, th, CG12284
EC: 2.3.2.27
Find proteins for Q24306 (Drosophila melanogaster)
Explore Q24306 
Go to UniProtKB:  Q24306
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Nedd2-like caspase CG8091-PAK, L, M, N, O, P, Q, R, K,  L,  M,  N,  O,  P,  Q,  R,  S,  T
12N/AMutation(s): 0 
Find proteins for Q9XYF4 (Drosophila melanogaster)
Explore Q9XYF4 
Go to UniProtKB:  Q9XYF4
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.10 Å
  • R-Value Free: 0.246 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.203 
  • Space Group: P 65
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 128.9α = 90
b = 128.9β = 90
c = 183.695γ = 120
Software Package:
Software NamePurpose
CNSrefinement

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-11-04
    Type: Initial release
  • Version 1.1: 2008-04-29
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2020-01-22
    Changes: Advisory, Derived calculations