1JLM

I-DOMAIN FROM INTEGRIN CR3, MN2+ BOUND


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.219 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

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: 1333-1340


  • PubMed Abstract: 
  • Integrins are plasma membrane proteins that mediate adhesion to other cells and to components of the extracellular matrix. Most integrins are constitutively inactive in resting cells, but are rapidly and reversibly activated in response to agonists, ...

    Integrins are plasma membrane proteins that mediate adhesion to other cells and to components of the extracellular matrix. Most integrins are constitutively inactive in resting cells, but are rapidly and reversibly activated in response to agonists, leading to highly regulated cell adhesion. This activation is associated with conformational changes in their extracellular portions, but the nature of the structural changes that lead to a change in adhesiveness is not understood. The interactions of several integrins with their extracellular ligands are mediated by an A-type domain (generally called the I-domain in integrins). Binding of the I-domain to protein ligands is dependent on divalent cations. We have described previously the structure of the I-domain from complement receptor 3 with bound Mg2+, in which the glutamate side chain from a second I-domain completes the octahedral coordination sphere of the metal, acting as a ligand mimetic.


    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
    • 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


    Organizational Affiliation

    Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA 02115, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
INTEGRIN
A
192Homo 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
MN
Query on MN

Download SDF File 
Download CCD File 
A
MANGANESE (II) ION
Mn
WAEMQWOKJMHJLA-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2 Å
  • R-Value Work: 0.219 
  • Space Group: C 1 2 1
Unit Cell:
Length (Å)Angle (°)
a = 135.000α = 90.00
b = 37.100β = 92.60
c = 38.500γ = 90.00
Software Package:
Software NamePurpose
SCALEPACKdata scaling
X-PLORmodel building
DENZOdata reduction
X-PLORrefinement
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1997-01-11
    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