3U0R

Helical repeat structure of apoptosis inhibitor 5 reveals protein-protein interaction modules


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.216 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Helical repeat structure of apoptosis inhibitor 5 reveals protein-protein interaction modules.

Han, B.G.Kim, K.H.Lee, S.J.Jeong, K.C.Cho, J.W.Noh, K.H.Kim, T.W.Kim, S.J.Yoon, H.J.Suh, S.W.Lee, S.H.Lee, B.I.

(2012) J.Biol.Chem. 287: 10727-10737

  • DOI: 10.1074/jbc.M111.317594
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Apoptosis inhibitor 5 (API5) is an anti-apoptotic protein that is up-regulated in various cancer cells. Here, we present the crystal structure of human API5. API5 exhibits an elongated all α-helical structure. The N-terminal half of API5 is similar t ...

    Apoptosis inhibitor 5 (API5) is an anti-apoptotic protein that is up-regulated in various cancer cells. Here, we present the crystal structure of human API5. API5 exhibits an elongated all α-helical structure. The N-terminal half of API5 is similar to the HEAT repeat and the C-terminal half is similar to the ARM (Armadillo-like) repeat. HEAT and ARM repeats have been implicated in protein-protein interactions, suggesting that the cellular roles of API5 may be to mediate protein-protein interactions. Various components of multiprotein complexes have been identified as API5-interacting protein partners, suggesting that API5 may act as a scaffold for multiprotein complexes. API5 exists as a monomer, and the functionally important heptad leucine repeat does not exhibit the predicted a dimeric leucine zipper. Additionally, Lys-251, which can be acetylated in cells, plays important roles in the inhibition of apoptosis under serum deprivation conditions. The acetylation of this lysine also affects the stability of API5 in cells.


    Organizational Affiliation

    Biomolecular Function Research Branch, Division of Convergence Technology, Research Institute, National Cancer Center, Goyang, Gyeonggi 410-769, Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Apoptosis inhibitor 5
A
507Homo sapiensMutation(s): 0 
Gene Names: API5
Find proteins for Q9BZZ5 (Homo sapiens)
Go to Gene View: API5
Go to UniProtKB:  Q9BZZ5
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.242 
  • R-Value Work: 0.216 
  • Space Group: P 21 21 21
Unit Cell:
Length (Å)Angle (°)
a = 46.423α = 90.00
b = 88.614β = 90.00
c = 136.290γ = 90.00
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data collection
PHENIXmodel building
SCALEPACKdata scaling
PHENIXphasing
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2012-02-22
    Type: Initial release
  • Version 1.1: 2013-07-10
    Type: Database references