1MQ8

Crystal structure of alphaL I domain in complex with ICAM-1


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free: 
    0.313 (Depositor) 
  • R-Value Work: 
    0.264 (Depositor), 0.260 (DCC) 
  • R-Value Observed: 
    0.280 (Depositor) 

Starting Model: experimental
View more details

wwPDB Validation   3D Report Full Report


Ligand Structure Quality Assessment 

Created with Raphaël 2.3.0Worse 01 BetterLigand structure goodness of fit to experimental dataBest fitted NAGClick on this verticalbar to view details

This is version 2.2 of the entry. See complete history


Literature

Structures of the aL I domain and its complex with ICAM-1 reveal a shape-shifting pathway for integrin regulation

Shimaoka, M.Xiao, T.Liu, J.-H.Yang, Y.Dong, Y.Jun, C.-D.McCormack, A.Zhang, R.Joachimiak, A.Takagi, J.Wang, J.-H.Springer, T.A.

(2003) Cell 112: 99-111

  • DOI: https://doi.org/10.1016/s0092-8674(02)01257-6
  • Primary Citation of Related Structures:  
    1MJN, 1MQ8, 1MQ9, 1MQA

  • PubMed Abstract: 

    The structure of the I domain of integrin alpha L beta 2 bound to the Ig superfamily ligand ICAM-1 reveals the open ligand binding conformation and the first example of an integrin-IgSF interface. The I domain Mg2+ directly coordinates Glu-34 of ICAM-1, and a dramatic swing of I domain residue Glu-241 enables a critical salt bridge. Liganded and unliganded structures for both high- and intermediate-affinity mutant I domains reveal that ligand binding can induce conformational change in the alpha L I domain and that allosteric signals can convert the closed conformation to intermediate or open conformations without ligand binding. Pulling down on the C-terminal alpha 7 helix with introduced disulfide bonds ratchets the beta 6-alpha 7 loop into three different positions in the closed, intermediate, and open conformations, with a progressive increase in affinity.


  • Organizational Affiliation

    The Center for Blood Research, Department of Pathology, Department of Anesthesia, Department of Pediatrics, Boston, Massachusetts 02115.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
intercellular adhesion molecule-1
A, C
291Homo sapiensMutation(s): 0 
Gene Names: ICAM-1
UniProt & NIH Common Fund Data Resources
Find proteins for P05362 (Homo sapiens)
Explore P05362 
Go to UniProtKB:  P05362
PHAROS:  P05362
GTEx:  ENSG00000090339 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP05362
Glycosylation
Glycosylation Sites: 4Go to GlyGen: P05362-1
Sequence Annotations
Expand
  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
Integrin alpha-L
B, D
177Homo sapiensMutation(s): 2 
Gene Names: LFA-1 (AlphaLbeta2)
UniProt & NIH Common Fund Data Resources
Find proteins for P20701 (Homo sapiens)
Explore P20701 
Go to UniProtKB:  P20701
PHAROS:  P20701
GTEx:  ENSG00000005844 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP20701
Sequence Annotations
Expand
  • Reference Sequence
Oligosaccharides

Help

Entity ID: 3
MoleculeChains Length2D Diagram Glycosylation3D Interactions
2-acetamido-2-deoxy-beta-D-glucopyranose-(1-4)-2-acetamido-2-deoxy-beta-D-glucopyranose
E, F, G, H
2N-Glycosylation
Glycosylation Resources
GlyTouCan:  G42666HT
GlyCosmos:  G42666HT
GlyGen:  G42666HT
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 3.30 Å
  • R-Value Free:  0.313 (Depositor) 
  • R-Value Work:  0.264 (Depositor), 0.260 (DCC) 
  • R-Value Observed: 0.280 (Depositor) 
Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 46.56α = 95.39
b = 62.868β = 106.67
c = 81.517γ = 90
Software Package:
Software NamePurpose
HKL-2000data collection
SCALEPACKdata scaling
AMoREphasing
CNSrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report



Ligand Structure Quality Assessment 

Created with Raphaël 2.3.0Worse 01 BetterLigand structure goodness of fit to experimental dataBest fitted NAGClick on this verticalbar to view details

Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2003-01-14
    Type: Initial release
  • Version 1.1: 2008-04-28
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Non-polymer description, Version format compliance
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary
  • Version 2.1: 2021-10-27
    Changes: Database references, Structure summary
  • Version 2.2: 2024-11-13
    Changes: Data collection, Refinement description, Structure summary