4JIF

Co-crystal structure of ICAP1 PTB domain in complex with a KRIT1 peptide

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.197 

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This is version 1.1 of the entry. See complete history. 


Literature

Cocrystal structure of the ICAP1 PTB domain in complex with a KRIT1 peptide.

Liu, W., Boggon, T.J.

(2013) Acta Crystallogr Sect F Struct Biol Cryst Commun 69: 494-498

  • DOI: 10.1107/S1744309113010762
  • Primary Citation of Related Structures:  
    4JIF

  • PubMed Abstract: 

    • Integrin cytoplasmic domain-associated protein-1 (ICAP1) is a suppressor of integrin activation and directly binds to the cytoplasmic tail of β1 integrins; its binding suppresses integrin activation by competition with talin. Krev/Rap1 interaction trapped-1 (KRIT1) releases ICAP1 suppression of integrin activation by sequestering ICAP1 away from integrin cytoplasmic tails ...

    Integrin cytoplasmic domain-associated protein-1 (ICAP1) is a suppressor of integrin activation and directly binds to the cytoplasmic tail of β1 integrins; its binding suppresses integrin activation by competition with talin. Krev/Rap1 interaction trapped-1 (KRIT1) releases ICAP1 suppression of integrin activation by sequestering ICAP1 away from integrin cytoplasmic tails. Here, the cocrystal structure of the PTB domain of ICAP1 in complex with a 29-amino-acid fragment (residues 170-198) of KRIT1 is presented to 1.7 Å resolution [the resolution at which 〈I/σ(I)〉 = 2.9 was 1.83 Å]. In previous studies, the structure of ICAP1 with integrin β1 was determined to 3.0 Å resolution and that of ICAP1 with the N-terminal portion of KRIT1 (residues 1-198) was determined to 2.54 Å resolution; therefore, this study provides the highest resolution structure yet of ICAP1 and allows further detailed analysis of the interaction of ICAP1 with its minimal binding region in KRIT1.

    Organizational Affiliation: 

    Department of Pharmacology, Yale University School of Medicine, New Haven, CT 06520, USA. liuweizhi@ouc.edu.cn



Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Integrin beta-1-binding protein 1A154Homo sapiensMutation(s): 0 
Gene Names: ITGB1BP1, ICAP1
Find proteins for O14713 (Homo sapiens)
Explore O14713 
Go to UniProtKB:  O14713
NIH Common Fund Data Resources
PHAROS:  O14713
GTEx:  ENSG00000119185
Protein Feature View
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  • Reference Sequence
Find similar proteins by: 
(by identity cutoff)  |  Structure
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
Krev interaction trapped protein 1B34Homo sapiensMutation(s): 0 
Gene Names: KRIT1, CCM1
Find proteins for O00522 (Homo sapiens)
Explore O00522 
Go to UniProtKB:  O00522
NIH Common Fund Data Resources
PHAROS:  O00522
GTEx:  ENSG00000001631
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.196 
  • R-Value Observed: 0.197 
  • Space Group: P 65 2 2
  • Diffraction Data DOI: 10.15785/SBGRID/548 SBGrid
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 81.017α = 90
b = 81.017β = 90
c = 89.583γ = 120
Software Package:
Software NamePurpose
CBASSdata collection
PHASERphasing
PHENIXrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

View Full Validation Report


View more in-depth experimental data

Entry History 

Deposition Data

  • Deposited Date: 2013-03-05 
  • Released Date: 2013-05-01 
    • Deposition Author(s): Liu, W., Boggon, T.J.

Revision History  (Full details and data files)

  • Version 1.0: 2013-05-01
    Type: Initial release
  • Version 1.1: 2013-07-10
    Changes: Database references