Structural analysis of AIMP2-DX2 and HSP70 interaction

Experimental Data Snapshot

  • Resolution: 2.15 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.178 

wwPDB Validation   3D Report Full Report

This is version 1.4 of the entry. See complete history


Targeting the interaction of AIMP2-DX2 with HSP70 suppresses cancer development.

Lim, S.Cho, H.Y.Kim, D.G.Roh, Y.Son, S.Y.Mushtaq, A.U.Kim, M.Bhattarai, D.Sivaraman, A.Lee, Y.Lee, J.Yang, W.S.Kim, H.K.Kim, M.H.Lee, K.Jeon, Y.H.Kim, S.

(2020) Nat Chem Biol 16: 31-41

  • DOI: https://doi.org/10.1038/s41589-019-0415-2
  • Primary Citation of Related Structures:  
    6JPV, 6K39

  • PubMed Abstract: 

    A tumorigenic factor, AIMP2 lacking exon 2 (AIMP2-DX2), is often upregulated in many cancers. However, how its cellular level is determined is not understood. Here, we report heat-shock protein HSP70 as a critical determinant for the level of AIMP2-DX2. Interaction of the two factors was identified by interactome analysis and structurally determined by X-ray crystallography and NMR analyses. HSP70 recognizes the amino (N)-terminal flexible region, as well as the glutathione S-transferase domain of AIMP2-DX2, via its substrate-binding domain, thus blocking the Siah1-dependent ubiquitination of AIMP2-DX2. AIMP2-DX2-induced cell transformation and cancer progression in vivo was further augmented by HSP70. A positive correlation between HSP70 and AIMP2-DX2 levels was shown in various lung cancer cell lines and patient tissues. Chemical intervention in the AIMP2-DX2-HSP70 interaction suppressed cancer cell growth in vitro and in vivo. Thus, this work demonstrates the importance of the interaction between AIMP2-DX2 and HSP70 on tumor progression and its therapeutic potential against cancer.

  • Organizational Affiliation

    College of Pharmacy, Korea University, Sejong, Republic of Korea.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Heat shock 70 kDa protein 1A,Aminoacyl tRNA synthase complex-interacting multifunctional protein 2
A, B
153Homo sapiensMutation(s): 0 
UniProt & NIH Common Fund Data Resources
Find proteins for P0DMV8 (Homo sapiens)
Explore P0DMV8 
Go to UniProtKB:  P0DMV8
GTEx:  ENSG00000204389 
Find proteins for Q13155 (Homo sapiens)
Explore Q13155 
Go to UniProtKB:  Q13155
PHAROS:  Q13155
GTEx:  ENSG00000106305 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsQ13155P0DMV8
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 2.15 Å
  • R-Value Free: 0.235 
  • R-Value Work: 0.174 
  • R-Value Observed: 0.178 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 41.111α = 90
b = 77.054β = 90
c = 88.711γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report

Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
National Research Foundation (Korea)Korea, Republic OfNRF-2013M3A6A4045160

Revision History  (Full details and data files)

  • Version 1.0: 2019-10-02
    Type: Initial release
  • Version 1.1: 2019-11-20
    Changes: Database references
  • Version 1.2: 2019-12-18
    Changes: Database references
  • Version 1.3: 2020-01-01
    Changes: Database references
  • Version 1.4: 2023-11-22
    Changes: Data collection, Database references, Refinement description