4JIF

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


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.701 Å
  • R-Value Free: 0.226 
  • R-Value Work: 0.196 

wwPDB Validation 3D Report Full Report


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 69: 494-498

  • DOI: 10.1107/S1744309113010762

  • 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 tr ...

    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: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Integrin beta-1-binding protein 1
A
154Homo sapiensMutation(s): 0 
Gene Names: ITGB1BP1 (ICAP1)
Find proteins for O14713 (Homo sapiens)
Go to Gene View: ITGB1BP1
Go to UniProtKB:  O14713
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Krev interaction trapped protein 1
B
34Homo sapiensMutation(s): 0 
Gene Names: KRIT1 (CCM1)
Find proteins for O00522 (Homo sapiens)
Go to Gene View: KRIT1
Go to UniProtKB:  O00522
Experimental Data & Validation

Experimental Data

Unit Cell:
Length (Å)Angle (°)
a = 81.017α = 90.00
b = 81.017β = 90.00
c = 89.583γ = 120.00
Software Package:
Software NamePurpose
PHASERphasing
CBASSdata collection
HKL-2000data reduction
HKL-2000data scaling
PHENIXrefinement

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

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

Revision History 

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