4APO

AIP TPR domain in complex with human Tomm20 peptide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.895 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.181 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Structure of the Tpr Domain of Aip: Lack of Client Protein Interaction with the C-Terminal Alpha-7 Helix of the Tpr Domain of Aip is Sufficient for Pituitary Adenoma Predisposition.

Morgan, R.M.Hernandez-Ramirez, L.C.Trivellin, G.Zhou, L.Roe, S.M.Korbonits, M.Prodromou, C.

(2012) Plos One 7: 53339

  • DOI: 10.1371/journal.pone.0053339
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Mutations of the aryl hydrocarbon receptor interacting protein (AIP) have been associated with familial isolated pituitary adenomas predisposing to young-onset acromegaly and gigantism. The precise tumorigenic mechanism is not well understood as AIP ...

    Mutations of the aryl hydrocarbon receptor interacting protein (AIP) have been associated with familial isolated pituitary adenomas predisposing to young-onset acromegaly and gigantism. The precise tumorigenic mechanism is not well understood as AIP interacts with a large number of independent proteins as well as three chaperone systems, HSP90, HSP70 and TOMM20. We have determined the structure of the TPR domain of AIP at high resolution, which has allowed a detailed analysis of how disease-associated mutations impact on the structural integrity of the TPR domain. A subset of C-terminal α-7 helix (Cα-7h) mutations, R304* (nonsense mutation), R304Q, Q307* and R325Q, a known site for AhR and PDE4A5 client-protein interaction, occur beyond those that interact with the conserved MEEVD and EDDVE sequences of HSP90 and TOMM20. These C-terminal AIP mutations appear to only disrupt client-protein binding to the Cα-7h, while chaperone binding remains unaffected, suggesting that failure of client-protein interaction with the Cα-7h is sufficient to predispose to pituitary adenoma. We have also identified a molecular switch in the AIP TPR-domain that allows recognition of both the conserved HSP90 motif, MEEVD, and the equivalent sequence (EDDVE) of TOMM20.


    Organizational Affiliation

    Genome Damage and Stability Centre, University of Sussex, Brighton, United Kingdom.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
AH RECEPTOR-INTERACTING PROTEIN
A, B
165Homo sapiensMutation(s): 1 
Gene Names: AIP (XAP2)
Find proteins for O00170 (Homo sapiens)
Go to Gene View: AIP
Go to UniProtKB:  O00170
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
MITOCHONDRIAL IMPORT RECEPTOR SUBUNIT TOM20 HOMOLOG
D, E
6Homo sapiensMutation(s): 0 
Gene Names: TOMM20 (KIAA0016)
Find proteins for Q15388 (Homo sapiens)
Go to Gene View: TOMM20
Go to UniProtKB:  Q15388
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download SDF File 
Download CCD File 
B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
12P
Query on 12P

Download SDF File 
Download CCD File 
B
DODECAETHYLENE GLYCOL
POLYETHYLENE GLYCOL PEG400
C24 H50 O13
WRZXKWFJEFFURH-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.895 Å
  • R-Value Free: 0.234 
  • R-Value Work: 0.181 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 60.200α = 90.00
b = 106.820β = 100.85
c = 68.470γ = 90.00
Software Package:
Software NamePurpose
PHASERphasing
PHENIXrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2013-01-23
    Type: Initial release