The Intercellular Adhesion Molecule-1 (ICAM-1, known as CD54) is a cell surface type I transmembrane glycoprotein with a molecular weight of 85 to 110 kDa. The primary function of ICAM-1 is to provide adhesion between endothelial cells and leukocytes after injury or stress. ICAM-1 is used as a receptor for various pathogens such as rhinoviruses, coxsackievirus A21 and the malaria parasite Plasmodium falciparum. ICAM-1 contains five immunoglobulin (Ig) domains in its long N-terminal extracellular region, a hydrophobic transmembrane domain, and a small C-terminal cytoplasmic domain.
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