Click here to close Hello! We notice that you are using Internet Explorer, which is not supported by Xenbase and may cause the site to display incorrectly. We suggest using a current version of Chrome, FireFox, or Safari.
Cell 1997 Sep 19;906:1023-9. doi: 10.1016/s0092-8674(00)80368-2.
Show Gene links Show Anatomy links

The SMN-SIP1 complex has an essential role in spliceosomal snRNP biogenesis.

Fischer U , Liu Q , Dreyfuss G .

Spinal muscular atrophy (SMA) is an often fatal neuromuscular disease that has been directly linked to the protein product of the Survival of Motor Neurons (SMN) gene. The SMN protein is tightly associated with a novel protein, SIP1, and together they form a complex with several spliceosomal snRNP proteins. Here we show that the SMN-SIP1 complex is associated with spliceosomal snRNAs U1 and U5 in the cytoplasm of Xenopus oocytes. Antibodies directed against the SMN-SIP1 complex strongly interfere with the cytoplasmic assembly of the common (Sm) snRNP proteins with spliceosomal snRNAs and with the import of the snRNP complex into the nucleus. Thus, the SMN-SIP1 complex is directly involved in the biogenesis of spliceosomal snRNPs. Defects in spliceosomal snRNP biogenesis may, therefore, be the cause of SMA.

PubMed ID: 9323130
Article link: Cell

Species referenced: Xenopus
Genes referenced: acta2 gemin2 scaf11 smn1 zeb2