Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 20701.55 
• Atom Count: 1450 
• Residue Count: 185 
• Unique protein chains: 1

1IAM

STRUCTURE OF THE TWO AMINO-TERMINAL DOMAINS OF HUMAN INTERCELLULAR ADHESION MOLECULE-1, ICAM-1

• DOI: 10.2210/pdb1IAM/pdb

• Classification: Viral protein receptor
• Organism(s): Homo sapiens
• Expression System: Spodoptera frugiperda
• Mutation(s): 3 


• Deposited: 1998-02-22 Released: 1998-04-29 
• Deposition Author(s): Bella, J., Kolatkar, P.R., Marlor, C., Greve, J.M., Rossmann, M.G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.1 Å
• R-Value Free: 0.303 
• R-Value Work: 0.214 

Literature

The structure of the two amino-terminal domains of human ICAM-1 suggests how it functions as a rhinovirus receptor and as an LFA-1 integrin ligand.

Bella, J., Kolatkar, P.R., Marlor, C.W., Greve, J.M., Rossmann, M.G.

(1998) Proc.Natl.Acad.Sci.USA 95: 4140-4145

• PubMed: 9539703 


• PubMed Abstract: 
  

The normal function of human intercellular adhesion molecule-1 (ICAM-1) is to provide adhesion between endothelial cells and leukocytes after injury or stress. ICAM-1 binds to leukocyte function-associated antigen (LFA-1) or macrophage-1 antigen (Mac-1). However, ICAM-1 is also used as a receptor by the major group of human rhinoviruses and is a catalyst for the subsequent viral uncoating during cell entry. The three-dimensional atomic structure of the two amino-terminal domains (D1 and D2) of ICAM-1 has been determined to 2.2-A resolution and fitted into a cryoelectron microscopy reconstruction of a rhinovirus-ICAM-1 complex. Rhinovirus attachment is confined to the BC, CD, DE, and FG loops of the amino-terminal Ig-like domain (D1) at the end distal to the cellular membrane. The loops are considerably different in structure to those of human ICAM-2 or murine ICAM-1, which do not bind rhinoviruses. There are extensive charge interactions between ICAM-1 and human rhinoviruses, which are mostly conserved in both major and minor receptor groups of rhinoviruses. The interaction of ICAMs with LFA-1 is known to be mediated by a divalent cation bound to the insertion (I)-domain on the alpha chain of LFA-1 and the carboxyl group of a conserved glutamic acid residue on ICAMs. Domain D1 has been docked with the known structure of the I-domain. The resultant model is consistent with mutational data and provides a structural framework for the adhesion between these molecules.

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Related Citations: 

• The Major Human Rhinovirus Receptor is Icam-1
  Greve, J.M.,Davis, G.,Meyer, A.M.,Forte, C.P.,Yost, S.C.,Marlor, C.W.,Kamarck, M.E.,Mcclelland, A.
  (1989) Cell 56: 839
• Structure of a Human Rhinovirus Complexed with its Receptor Molecule
  Olson, N.H.,Kolatkar, P.R.,Oliveira, M.A.,Cheng, R.H.,Greve, J.M.,Mcclelland, A.,Baker, T.S.,Rossmann, M.G.
  (1993) Proc.Natl.Acad.Sci.USA 90: 507




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Organizational Affiliation: 

Department of Biological Sciences, Purdue University, West Lafayette, IN 47907-1392, USA.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
INTERCELLULAR ADHESION MOLECULE-1	A	185	Homo sapiens	Mutation(s): 3  Gene Names: ICAM1
Find proteins for P05362 (Homo sapiens) Go to Gene View: ICAM1 Go to UniProtKB:  P05362

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
NAG	A	N-ACETYL-D-GLUCOSAMINE C8 H15 N O6 OVRNDRQMDRJTHS-FMDGEEDCSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.1 Å
• R-Value Free: 0.303 
• R-Value Work: 0.214 
• Space Group: C 2 2 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 41.857	α = 90.00
b = 124.736	β = 90.00
c = 83.186	γ = 90.00

Software Package:

Software Name	Purpose
SCALEPACK	data scaling
X-PLOR	refinement
DENZO	data reduction
X-PLOR	model building
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1998-02-22 
• Released Date: 1998-04-29 
• Deposition Author(s): Bella, J., Kolatkar, P.R., Marlor, C., Greve, J.M., Rossmann, M.G.

Revision History 

• Version 1.0: 1998-04-29
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Non-polymer description, Version format compliance
• Version 1.3: 2011-11-16
  Type: Atomic model