LYRIC is a family of proteins found in eukaryotes. It is a type-1b membrane protein with a single transmembrane domain and localises to the endoplasmic reticulum and the nuclear envelope. It is also found in the nucleolus, suggesting functional relationships between these two cellular compartments [1]. It is found to be colocalised with tight junction proteins ZO-1 and occludin in polarised epithelial cells, suggesting that LYRIC is part of the tight junction complex [2]. LYRIC has been shown to promote tumour cell migration and invasion by activating the transcription factor NF-kappaB [3].

1: 3D3/lyric: a novel transmembrane protein of the endoplasmic reticulum and nuclear envelope, which is also present in the nucleolus. Sutherland HG, Lam YW, Briers S, Lamond AI, Bickmore WA; Exp Cell Res. 2004;294:94-105. PMID:14980505

2: Identification of a novel protein, LYRIC, localized to tight junctions of polarized epithelial cells. Britt DE, Yang DF, Yang DQ, Flanagan D, Callanan H, Lim YP, Lin SH, Hixson DC; Exp Cell Res. 2004;300:134-148. PMID:15383321

3: LYRIC/AEG-1 overexpression modulates BCCIPalpha protein levels in prostate tumor cells. Ash SC, Yang DQ, Britt DE; Biochem Biophys Res Commun. 2008;371:333-338. PMID:18440304