Purified U7 snRNPs lack the Sm proteins D1 and D2 but contain Lsm10, a new 14 kDa Sm D1-like protein.

Pillai, R S; Will, C L; Lührmann, R; Schümperli, Daniel; Müller, B (2001). Purified U7 snRNPs lack the Sm proteins D1 and D2 but contain Lsm10, a new 14 kDa Sm D1-like protein. EMBO journal, 20(19), pp. 5470-5479. Nature Publishing Group 10.1093/emboj/20.19.5470

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U7 snRNPs were isolated from HeLa cells by biochemical fractionation, followed by affinity purification with a biotinylated oligonucleotide complementary to U7 snRNA. Purified U7 snRNPs lack the Sm proteins D1 and D2, but contain additional polypeptides of 14, 50 and 70 kDa. Microsequencing identified the 14 kDa polypeptide as a new Sm-like protein related to Sm D1 and D3. Like U7 snRNA, this protein, named Lsm10, is enriched in Cajal bodies of the cell nucleus. Its incorporation into U7 snRNPs is largely dictated by the special Sm binding site of U7 snRNA. This novel type of Sm complex, composed of both conventional Sm proteins and the Sm-like Lsm10, is most likely to be important for U7 snRNP function and subcellular localization.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Cell Biology

UniBE Contributor:

Schümperli, Daniel

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

0261-4189

Publisher:

Nature Publishing Group

Language:

English

Submitter:

Daniel Schümperli

Date Deposited:

08 May 2015 11:36

Last Modified:

08 May 2015 11:36

Publisher DOI:

10.1093/emboj/20.19.5470

PubMed ID:

11574479

URI:

https://boris.unibe.ch/id/eprint/68856

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