ARGLU, arginine and glutamate-rich 1 protein family, is required for the oestrogen-dependent expression of ESR1 target genes. It functions in cooperation with MED1. The family of proteins is found in eukaryotes.

1: Arginine and glutamate-rich 1 (ARGLU1) interacts with mediator subunit 1 (MED1) and is required for estrogen receptor-mediated gene transcription and breast cancer cell growth. Zhang D, Jiang P, Xu Q, Zhang X; J Biol Chem. 2011;286:17746-17754. PMID:21454576