ICAMs promote intercellular adhesion and are important in inflammation, immune responses and in intracellular signalling events [1-5]. They belong to the Ig-like superfamily and differ in their cell expression patterns and numbers of Ig-like domains (ICAM-2 and ICAM-4 have two, ICAM-1 and ICAM-3 have five and ICAM-5 has nine [5]). Domain 2 (D2), represented in this entry, is most similar between ICAM-1, 3 and 5 [5].

1: Structures of the alpha L I domain and its complex with ICAM-1 reveal a shape-shifting pathway for integrin regulation. Shimaoka M, Xiao T, Liu JH, Yang Y, Dong Y, Jun CD, McCormack A, Zhang R, Joachimiak A, Takagi J, Wang JH, Springer TA; Cell. 2003;112:99-111. PMID:12526797

2: Structural basis for dimerization of ICAM-1 on the cell surface. Yang Y, Jun CD, Liu JH, Zhang R, Joachimiak A, Springer TA, Wang JH; Mol Cell. 2004;14:269-276. PMID:15099525

3: The crystal structure of coxsackievirus A21 and its interaction with ICAM-1. Xiao C, Bator-Kelly CM, Rieder E, Chipman PR, Craig A, Kuhn RJ, Wimmer E, Rossmann MG; Structure. 2005;13:1019-1033. PMID:16004874

4: Structural plasticity in Ig superfamily domain 4 of ICAM-1 mediates cell surface dimerization. Chen X, Kim TD, Carman CV, Mi LZ, Song G, Springer TA; Proc Natl Acad Sci U S A. 2007;104:15358-15363. PMID:17881562

5: Crystal structures of an ICAM-5 ectodomain fragment show electrostatic-based homophilic adhesions. Recacha R, Jimenez D, Tian L, Barredo R, Gahmberg CG, Casasnovas JM; Acta Crystallogr D Biol Crystallogr. 2014;70:1934-1943. PMID:25004970