Integrin-associated protein is a ligand for the P84 neural adhesion molecule.
P84 (also known as SHPS-1, BIT, and SIRP) is a heterophilic adhesive membrane protein involved in receptor tyrosine kinase signaling that is found at synapses in the mammalian central nervous system and in non-neural tissues. We have identified a binding partner for P84 using an expression cloning strategy. Here we report that integrin-associated protein (IAP/CD47) is a predominant binding partner of P84. Immunohistochemistry reveals a virtually identical distribution of P84 and IAP in a variety of adult brain regions. Because IAP has been implicated in cell signaling in cells of the immune system, P84 and IAP represent a heterophilic binding pair that is likely to be involved in bi-directional signaling at the synapse and in other tissues.
Jiang
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P
Department of Neurobiology, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania 15213, USA.
Lagenaur
C F
CF
Narayanan
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V
D000595:Amino Acid Sequence; D000818:Animals; D000906:Antibodies / Q000276:immunology; D015703:Antigens, CD / Q000737:chemistry / Q000276:immunology / Q000378:metabolism*; D000943:Antigens, Differentiation; D001921:Brain / Q000378:metabolism; D051928:CD47 Antigen; D002352:Carrier Proteins / Q000737:chemistry / Q000276:immunology / Q000378:metabolism*; D003001:Cloning, Molecular; D018076:DNA, Complementary; D008024:Ligands; D008562:Membrane Glycoproteins / Q000378:metabolism*; D051379:Mice; D008969:Molecular Sequence Data; D039842:Neural Cell Adhesion Molecule L1; D019006:Neural Cell Adhesion Molecules / Q000378:metabolism*; D011971:Receptors, Immunologic; D011993:Recombinant Fusion Proteins / Q000378:metabolism
D000906:Antibodies; D015703:Antigens, CD; D000943:Antigens, Differentiation; D051928:CD47 Antigen; D002352:Carrier Proteins; C497895:Cd47 protein, mouse; D018076:DNA, Complementary; D008024:Ligands; D008562:Membrane Glycoproteins; D039842:Neural Cell Adhesion Molecule L1; D019006:Neural Cell Adhesion Molecules; C501922:Sirpa protein, mouse; D011971:Receptors, Immunologic; D011993:Recombinant Fusion Proteins