1ZOO

CD11A I-DOMAIN WITH BOUND MAGNESIUM ION


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.279 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

The role of the divalent cation in the structure of the I domain from the CD11a/CD18 integrin.

Qu, A.Leahy, D.J.

(1996) Structure 4: 931-942

  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • The integrin family of cell-surface receptors mediates a wide variety of cell-cell and cell-extracellular matrix interactions. Integrin-ligand interactions are invariably dependent on the presence of divalent cations, and a subset of integrins contai ...

    The integrin family of cell-surface receptors mediates a wide variety of cell-cell and cell-extracellular matrix interactions. Integrin-ligand interactions are invariably dependent on the presence of divalent cations, and a subset of integrins contain a approximately 200 amino acid inserted (I) domain that is important for ligand binding activity and contains a single divalent cation binding site. Many integrins are believed to respond to stimuli by undergoing a conformational change that increases their affinity for ligand, and there is a clear difference between two crystal structures of the CD11b I domain with different divalent cations (magnesium and manganese) bound. In addition to the different bound cation, a 'ligand mimetic' crystal lattice interaction in the CD11b I domain structure with bound magnesium has led to the interpretation that the different CD11b I domain structures represent different affinity states of I domains. The influence of the bound cation on I domain structure and function remains incompletely understood, however. The crystal structure of the CD11a I domain bound to manganese is known. We therefore set out to determine whether this structure changes when the metal ion is altered or removed.


    Related Citations: 
    • Crystal Structure of the I-Domain from the Cd11A/Cd18 (Lfa-1, Alpha L Beta 2) Integrin
      Qu, A.,Leahy, D.J.
      (1995) Proc.Natl.Acad.Sci.USA 92: 10277


    Organizational Affiliation

    Department of Biophysics and Biophysical Chemistry, Johns Hopkins University School of Medicine, 725 N. Wolfe Street, Baltimore, MD 21205, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LEUKOCYTE ADHESION GLYCOPROTEIN
A, B
187Homo sapiensMutation(s): 0 
Gene Names: ITGAL (CD11A)
Find proteins for P20701 (Homo sapiens)
Go to Gene View: ITGAL
Go to UniProtKB:  P20701
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A, B
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
MG
Query on MG

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

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3 Å
  • R-Value Free: 0.264 
  • R-Value Work: 0.279 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 75.560α = 90.00
b = 78.320β = 90.00
c = 66.280γ = 90.00
Software Package:
Software NamePurpose
DENZOdata reduction
X-PLORrefinement
X-PLORmodel building
SCALEPACKdata scaling
X-PLORphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 1996-06-21 
  • Released Date: 1996-12-07 
  • Deposition Author(s): Leahy, D.J., Qu, A.

Revision History 

  • Version 1.0: 1996-12-07
    Type: Initial release
  • Version 1.1: 2008-03-24
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance