Ligand-dependent nuclear receptor-interacting factor 1 (LRIF1)

Ligand-dependent nuclear receptor-interacting factor 1 (LRIF1) is a nuclear protein that functions as a chromatin regulator, contributing to chromatin organization, epigenetic gene silencing, and chromosome segregation during mitosis[1][2][4]. LRIF1 recruits Heterochromatin protein 1 alpha (HP1α) to the centromere via a conserved PXVXL motif, a process essential for accurate chromosome alignment and segregation during cell division[1]. It also plays a role in dosage compensation through X chromosome inactivation by collaborating with SMCHD1, compacts heterochromatin, and suppresses gene expression from loci such as DUX4[2][3]. Mutations in the LRIF1 gene are associated with facioscapulohumeral muscular dystrophy type 3 (FSHD3) and its protein product interacts with the nuclear retinoic acid receptor and other chromatin-associated regulators[2][3][4]. LRIF1 is not a receptor, enzyme, transporter, or typical therapeutic target, and currently, there are no known drugs or clinical biomarkers associated with it[2][4].

Other names

C1orf103RIF1FLJ11269HBiX1FSHD3HP1-binding protein enriched in inactive X chromosome protein 1Receptor-interacting factor 1