1IDO

I-DOMAIN FROM INTEGRIN CR3, MG2+ BOUND


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Work: 0.202 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Crystal structure of the A domain from the alpha subunit of integrin CR3 (CD11b/CD18).

Lee, J.O.Rieu, P.Arnaout, M.A.Liddington, R.

(1995) Cell 80: 631-638


  • PubMed Abstract: 
  • We have determined the high resolution crystal structure of the A domain from the alpha chain of integrin CR3. The domain adopts a classic alpha/beta "Rossmann" fold and contains an unusual Mg2+ coordination site at its surface. One of the coordinati ...

    We have determined the high resolution crystal structure of the A domain from the alpha chain of integrin CR3. The domain adopts a classic alpha/beta "Rossmann" fold and contains an unusual Mg2+ coordination site at its surface. One of the coordinating ligands is the glutamate side chain from another A domain molecule. We suggest that this site represents a general metal ion-dependent adhesion site (MIDAS) for binding protein ligands. We further propose that the beta subunits of integrins contain a MIDAS motif within a modified A domain. Our crystal structure will allow reliable models to be built for other members of the A domain superfamily and should facilitate development of novel adhesion modulatory drugs.


    Related Citations: 
    • A Novel Divalent Cation-Binding Site in the a Domain of the Beta 2 Integrin Cr3 (Cd11B/Cd18) is Essential for Ligand Binding
      Michishita, M.,Videm, V.,Arnaout, M.A.
      (1993) Cell 72: 857
    • Two Conformations of the Integrin A-Domain (I-Domain): A Pathway for Activation?
      Lee, J.-O.,Bankston, L.A.,Arnaout, M.A.,Liddington, R.C.
      (1995) Structure 3: 1333


    Organizational Affiliation

    Laboratory of X-Ray Crystallography, Dana Farber Cancer Institute, Harvard Medical School Boston, Massachusetts 02115.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INTEGRIN
A
189Homo sapiensMutation(s): 0 
Gene Names: ITGAM (CD11B, CR3A)
Find proteins for P11215 (Homo sapiens)
Go to Gene View: ITGAM
Go to UniProtKB:  P11215
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
MG
Query on MG

Download SDF File 
Download CCD File 
A
MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Work: 0.202 
  • Space Group: P 43
Unit Cell:
Length (Å)Angle (°)
a = 45.700α = 90.00
b = 45.700β = 90.00
c = 94.300γ = 90.00
Software Package:
Software NamePurpose
X-PLORphasing
X-PLORmodel building
X-PLORrefinement
DENZOdata reduction
SCALEPACKdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1996-08-01
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance
  • Version 1.3: 2018-03-21
    Type: Data collection, Other