2D1X

The crystal structure of the cortactin-SH3 domain and AMAP1-peptide complex


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Targeting AMAP1 and cortactin binding bearing an atypical src homology 3/proline interface for prevention of breast cancer invasion and metastasis.

Hashimoto, S.Hirose, M.Hashimoto, A.Morishige, M.Yamada, A.Hosaka, H.Akagi, K.Ogawa, E.Oneyama, C.Agatsuma, T.Okada, M.Kobayashi, H.Wada, H.Nakano, H.Ikegami, T.Nakagawa, A.Sabe, H.

(2006) Proc Natl Acad Sci U S A 103: 7036-7041

  • DOI: 10.1073/pnas.0509166103
  • Primary Citation of Related Structures:  
    2D1X

  • PubMed Abstract: 
  • Invasive potentials of carcinomas greatly contribute to their metastasis, which is a major threat in most cancers. We have recently shown that Arf6 plays a pivotal role in breast cancer invasive activities and identified AMAP1 as an effector of GTP-Arf6 in invasion ...

    Invasive potentials of carcinomas greatly contribute to their metastasis, which is a major threat in most cancers. We have recently shown that Arf6 plays a pivotal role in breast cancer invasive activities and identified AMAP1 as an effector of GTP-Arf6 in invasion. Expression of AMAP1 correlates well with invasive phenotypes of primary tumors of the human breast. We also have shown that AMAP1 functions by forming a trimeric protein complex with cortactin and paxillin. In this complex, AMAP1 binds to the src homology 3 (SH3) domain of cortactin via its proline-rich peptide, SKKRPPPPPPGHKRT. SH3 domains are known to bind generally to the proline-rich ligands with a one-to-one stoichiometry. We found that AMAP1/cortactin binding is very atypical in its stoichiometry and interface structure, in which one AMAP1 proline-rich peptide binds to two cortactin SH3 domains simultaneously. We made a cell-permeable peptide derived from the AMAP1 peptide, and we show that this peptide specifically blocks AMAP1/cortactin binding, but not other canonical SH3/proline bindings, and effectively inhibits breast cancer invasion and metastasis. Moreover, this peptide was found to block invasion of other types of cancers, such as glioblastomas and lung carcinomas. We also found that a small-molecule compound, UCS15A, which was previously judged as a weak inhibitor against canonical SH3/proline bindings, effectively inhibits AMAP1/cortactin binding and breast cancer invasion and metastasis. Together with fine structural analysis, we propose that the AMAP1/cortactin complex, which is not detected in normal mammary epithelial cells, is an excellent drug target for cancer therapeutics.


    Organizational Affiliation

    Department of Molecular Biology, Osaka Bioscience Institute, Osaka 565-0874, Japan.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
cortactin isoform aA, B, C, D66Homo sapiensMutation(s): 0 
Gene Names: CTTN(AMINO ACIDS 490-550)CTTNEMS1
Find proteins for Q14247 (Homo sapiens)
Explore Q14247 
Go to UniProtKB:  Q14247
NIH Common Fund Data Resources
PHAROS:  Q14247
Protein Feature View
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  • Reference Sequence
  • Find similar proteins by:  Sequence   |   Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
proline rich region from development and differentiation enhancing factor 1E [auth P], F [auth Q]15N/AMutation(s): 0 
Find proteins for Q9ULH1 (Homo sapiens)
Explore Q9ULH1 
Go to UniProtKB:  Q9ULH1
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PHAROS:  Q9ULH1
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 Ideal Coordinates CCD File 
G [auth P], H [auth Q]SULFATE ION
O4 S
QAOWNCQODCNURD-UHFFFAOYSA-L
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.90 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.216 
  • R-Value Observed: 0.216 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 71.45α = 90
b = 132.14β = 90
c = 61.2γ = 90
Software Package:
Software NamePurpose
CNSrefinement
MOSFLMdata reduction
CCP4data scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2006-04-25
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance