Structural highlights
Function
[SMN1_SCHPO] Has been implicated indirectly in general cellular RNA processing. Plays a crucial role in the generation of the pre-mRNA splicing machinery and in mRNA biogenesis by interacting with spliceosomal snRNPs.
Publication Abstract from PubMed
The macromolecular SMN complex facilitates the formation of Sm-class ribonucleoproteins involved in mRNA processing (UsnRNPs). While biochemical studies have revealed key activities of the SMN complex, its structural investigation is lagging behind. Here we report on the identification and structural determination of the SMN complex from the lower eukaryote Schizosaccharomyces pombe, consisting of SMN, Gemin2, 6, 7, 8 and Sm proteins. The core of the SMN complex is formed by several copies of SMN tethered through its C-terminal alpha-helices arranged with alternating polarity. This creates a central platform onto which Gemin8 binds and recruits Gemins 6 and 7. The N-terminal parts of the SMN molecules extrude via flexible linkers from the core and enable binding of Gemin2 and Sm proteins. Our data identify the SMN complex as a multivalent hub where Sm proteins are collected in its periphery to allow their joining with UsnRNA.
Identification and structural analysis of the Schizosaccharomyces pombe SMN complex.,Veepaschit J, Viswanathan A, Bordonne R, Grimm C, Fischer U Nucleic Acids Res. 2021 Jul 21;49(13):7207-7223. doi: 10.1093/nar/gkab158. PMID:33754639[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
References
- ↑ Veepaschit J, Viswanathan A, Bordonne R, Grimm C, Fischer U. Identification and structural analysis of the Schizosaccharomyces pombe SMN complex. Nucleic Acids Res. 2021 Jul 21;49(13):7207-7223. doi: 10.1093/nar/gkab158. PMID:33754639 doi:http://dx.doi.org/10.1093/nar/gkab158
