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Cloning, sequencing and analysis of cDNA encoding bovine intercellular adhesion molecule-1 (ICAM-1).

Lee E.K., Kang S.G., Kehrli M.E. Jr.

Intercellular adhesion molecule-1 (ICAM-1) is an inducible glycoprotein that interacts with the leukocyte beta 2-integrins, LFA-1 and Mac-1. We have isolated and analyzed a cDNA clone coding for the putative bovine ICAM-1 gene and compared it with known comparative sequences from other species as well as bovine ICAM-3. The 3398-bp bovine ICAM-1 cDNA sequence codes for 535 amino acids and shows 57% homology with human ICAM-1 and 47% homology with bovine ICAM-3 at the amino acid levels. The predicted number and positions of cysteine residues in bovine ICAM-1 are all conserved among species including bovine ICAM-3. It has two arginine-glycine-aspartate (RGD) sites in the extracellular region and a serine residue in the cytoplasmic tail. Northern blot results show that the bovine ICAM-1 gene is expressed in stimulated leukocytes whereas bovine ICAM-3 is expressed predominantly in resting neutrophils.

Vet. Immunol. Immunopathol. 59:121-129(1997) [PubMed] [Europe PMC]

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