Gem-associated protein 4 (GEMIN4)

Gem-associated protein 4 (GEMIN4) is a multifunctional protein encoded by the GEMIN4 gene, serving as an integral component of the Survival Motor Neuron (SMN) complex located in both cytoplasmic and nuclear compartments, including specialized nuclear bodies called gems and nucleoli[1][2][3][4][5]. GEMIN4 interacts tightly with other Gemin proteins (notably Gemin3) and several spliceosomal core Sm proteins, playing a crucial role in the assembly and maturation of small nuclear ribonucleoproteins (snRNPs) essential for pre-mRNA splicing[1][2][3]. It contains functional nuclear localization signals that regulate subcellular localization of the SMN complex and its components[3]. GEMIN4 deficiency or dysfunction is implicated in the pathogenesis of spinal muscular atrophy and several neurodevelopmental disorders, with genetic variants associated with susceptibility to various cancers[4][5]. GEMIN4 is considered essential for mammalian viability, as shown by early embryonic lethality in knockout mouse models[3]. No drugs currently interact directly with GEMIN4, and it is not an established therapeutic target, but its central role in RNA metabolism makes it critical in disease biology and a research focus in molecular genetics and pathology.

Other names

GEMIN4Gemin-4Gem nuclear organelle associated protein 4HHRF-1DKFZP434B131p97DKFZP434D174HC56HCAP1Component of gems 4HCC-associated protein 1