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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

The human leukocyte-adhesion ligand, intercellular-adhesion molecule 2. Expression and characterization of the protein.

The leukocyte cell-adhesion receptors, complexes of the cluster of differentiation antigen 11a with cluster of differentiation antigen 18 (CD11a/CD18), cluster of differentiation antigen 11b with cluster of differentiation antigen 18 (CD11b CD18) and cluster of differentiation antigen 11c with cluster of differentiation antigen 18 (CD11c CD18), are of major importance in several leukocyte functions. Previously a cellular ligand named intercellular-adhesion molecule 1 (ICAM-1) was identified, isolated and extensively characterized. Recently a second similar molecule, intercellular-adhesion molecule 2 (ICAM-2), was found by a functional DNA-cloning method. We have now synthesized the ICAM-2 DNA by the polymerase chain reaction (PCR), sequenced it, and transferred it into mammalian and bacterial expression vectors. A functional leukocyte-binding glycoprotein was obtained by transfection of COS-1 cells. A soluble protein-A - ICAM-2 fusion protein was made in Escherichia coli, purified and used for antiserum production. The antiserum precipitated a cell-surface protein with an apparent molecular mass of 55 kDa from ICAM-2 transfected COS-1 cells, leukocytes and endothelial cells, and inhibited leukocyte binding to transfected COS-1 cells. The bacterial fusion protein, lacking carbohydrate, specifically bound to leukocyte receptors.[1]

References

  1. The human leukocyte-adhesion ligand, intercellular-adhesion molecule 2. Expression and characterization of the protein. Gahmberg, C.G., Nortamo, P., Zimmermann, D., Ruoslahti, E. Eur. J. Biochem. (1991) [Pubmed]
 
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