Pilt is a family of eukaryotic tight junction-proteins that binds to guanylate-kinase. Pilt is a component of TJs (Tight junctions) rather than AJs (Adhesin junctions). The protein is incorporated into TJs after TJ strands are formed, thereby suggesting the name Pilt for 'protein incorporated later into TJs'. Pilt binds to the guanylate-kinase region of hDlg otherwise known as Disk large homologue [1].

1: Pilt, a novel peripheral membrane protein at tight junctions in epithelial cells. Kawabe H, Nakanishi H, Asada M, Fukuhara A, Morimoto K, Takeuchi M, Takai Y; J Biol Chem. 2001;276:48350-48355. PMID:11602598