3NMW

Crystal structure of armadillo repeats domain of APC


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.170 

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history


Literature

Structural basis for the recognition of Asef by adenomatous polyposis coli.

Zhang, Z.Chen, L.Gao, L.Lin, K.Zhu, L.Lu, Y.Shi, X.Gao, Y.Zhou, J.Xu, P.Zhang, J.Wu, G.

(2012) Cell Res 22: 372-386

  • DOI: 10.1038/cr.2011.119
  • Structures With Same Primary Citation

  • PubMed Abstract: 
  • Adenomatous polyposis coli (APC) regulates cell-cell adhesion and cell migration through activating the APC-stimulated guanine nucleotide-exchange factor (GEF; Asef), which is usually autoinhibited through the binding between its Src homology 3 (SH3) ...

    Adenomatous polyposis coli (APC) regulates cell-cell adhesion and cell migration through activating the APC-stimulated guanine nucleotide-exchange factor (GEF; Asef), which is usually autoinhibited through the binding between its Src homology 3 (SH3) and Dbl homology (DH) domains. The APC-activated Asef stimulates the small GTPase Cdc42, which leads to decreased cell-cell adherence and enhanced cell migration. In colorectal cancers, truncated APC constitutively activates Asef and promotes cancer cell migration and angiogenesis. Here, we report crystal structures of the human APC/Asef complex. We find that the armadillo repeat domain of APC uses a highly conserved surface groove to recognize the APC-binding region (ABR) of Asef, conformation of which changes dramatically upon binding to APC. Key residues on APC and Asef for the complex formation were mutated and their importance was demonstrated by binding and activity assays. Structural superimposition of the APC/Asef complex with autoinhibited Asef suggests that the binding between APC and Asef might create a steric clash between Asef-DH domain and APC, which possibly leads to a conformational change in Asef that stimulates its GEF activity. Our structures thus elucidate the molecular mechanism of Asef recognition by APC, as well as provide a potential target for pharmaceutical intervention against cancers.


    Organizational Affiliation

    State Key Laboratory of Microbial Metabolism, Shanghai Jiao Tong University, Shanghai 200240, China.



Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
APC variant proteinA, B354Homo sapiensMutation(s): 0 
Gene Names: APC variant proteinAPCDP2.5
Find proteins for P25054 (Homo sapiens)
Explore P25054 
Go to UniProtKB:  P25054
NIH Common Fund Data Resources
PHAROS  P25054
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
SO4
Query on SO4

Download CCD File 
A, B
SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
MSE
Query on MSE
A,BL-PEPTIDE LINKINGC5 H11 N O2 SeMET
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.60 Å
  • R-Value Free: 0.201 
  • R-Value Work: 0.168 
  • R-Value Observed: 0.170 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 51.389α = 90.31
b = 52.682β = 89.95
c = 63.451γ = 95.16
Software Package:
Software NamePurpose
SCALEPACKdata scaling
SOLVEphasing
RESOLVEphasing
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2011-07-06
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2016-12-21
    Changes: Structure summary
  • Version 1.3: 2017-03-15
    Changes: Database references
  • Version 1.4: 2019-12-25
    Changes: Advisory, Database references, Derived calculations