3U7D

Crystal structure of the KRIT1/CCM1 FERM domain in complex with the heart of glass (HEG1) cytoplasmic tail


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.237 

wwPDB Validation   3D Report Full Report


This is version 1.2 of the entry. See complete history


Literature

Structural basis of the junctional anchorage of the cerebral cavernous malformations complex.

Gingras, A.R.Liu, J.J.Ginsberg, M.H.

(2012) J Cell Biol 199: 39-48

  • DOI: 10.1083/jcb.201205109
  • Primary Citation of Related Structures:  
    3U7D

  • PubMed Abstract: 
  • The products of genes that cause cerebral cavernous malformations (CCM1/KRIT1, CCM2, and CCM3) physically interact. CCM1/KRIT1 links this complex to endothelial cell (EC) junctions and maintains junctional integrity in part by inhibiting RhoA. Heart of glass (HEG1), a transmembrane protein, associates with KRIT1 ...

    The products of genes that cause cerebral cavernous malformations (CCM1/KRIT1, CCM2, and CCM3) physically interact. CCM1/KRIT1 links this complex to endothelial cell (EC) junctions and maintains junctional integrity in part by inhibiting RhoA. Heart of glass (HEG1), a transmembrane protein, associates with KRIT1. In this paper, we show that the KRIT1 band 4.1, ezrin, radixin, and moesin (FERM) domain bound the HEG1 C terminus (K(d) = 1.2 µM) and solved the structure of this assembly. The KRIT1 F1 and F3 subdomain interface formed a hydrophobic groove that binds HEG1(Tyr(1,380)-Phe(1,381)), thus defining a new mode of FERM domain-membrane protein interaction. This structure enabled design of KRIT1(L717,721A), which exhibited a >100-fold reduction in HEG1 affinity. Although well folded and expressed, KRIT1(L717,721A) failed to target to EC junctions or complement the effects of KRIT1 depletion on zebrafish cardiovascular development or Rho kinase activation in EC. These data establish that this novel FERM-membrane protein interaction anchors CCM1/KRIT1 at EC junctions to support cardiovascular development.


    Organizational Affiliation

    Department of Medicine, University of California, San Diego, La Jolla, CA 92093, USA.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Krev interaction trapped protein 1 AC322Homo sapiensMutation(s): 0 
Gene Names: CCM1Cerebral cavernous malformations 1 proteinKrev interaction trapped protein 1 or CCM1KRIT1
Find proteins for O00522 (Homo sapiens)
Explore O00522 
Go to UniProtKB:  O00522
NIH Common Fund Data Resources
PHAROS:  O00522
Protein Feature View
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Protein HEG homolog 1 BD26Homo sapiensMutation(s): 0 
Gene Names: HEG1KIAA1237
Find proteins for Q9ULI3 (Homo sapiens)
Explore Q9ULI3 
Go to UniProtKB:  Q9ULI3
NIH Common Fund Data Resources
PHAROS:  Q9ULI3
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.49 Å
  • R-Value Free: 0.309 
  • R-Value Work: 0.234 
  • R-Value Observed: 0.237 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 73.05α = 90
b = 76.82β = 113.62
c = 79.18γ = 90
Software Package:
Software NamePurpose
MxCuBEdata collection
PHASERphasing
REFMACrefinement
MOSFLMdata reduction
SCALAdata scaling

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2012-09-12
    Type: Initial release
  • Version 1.1: 2012-10-17
    Changes: Database references
  • Version 1.2: 2013-02-27
    Changes: Other