A 5'-3' exonuclease activity involved in forming the 3' products of histone pre-mRNA processing in vitro.

Walther, T N; Wittop Koning, T H; Schümperli, Daniel; Müller, B (1998). A 5'-3' exonuclease activity involved in forming the 3' products of histone pre-mRNA processing in vitro. RNA - a publication of the RNA Society, 4(9), pp. 1034-1046. Cold Spring Harbor Laboratory Press

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Histone RNA 3' processing in vitro produces one or more 5' cleavage products corresponding to the mature histone mRNA 3' end, and a group of 3' cleavage products whose 5' ends are mostly located several nucleotides downstream of the mRNA 3' end. The formation of these 3' products is coupled to the formation of 5' products and dependent on the U7 snRNP and a heat-labile processing factor. These short 3' products therefore are a true and general feature of the processing reaction. Identical 3' products are also formed from a model RNA containing all spacer nucleotides downstream of the mature mRNA 3' end, but no sequences from the mature mRNA. Again, this reaction is dependent on both the U7 snRNP and a heat-labile factor. Unlike the processing with a full-length histone pre-mRNA, this reaction produces only 3' but no 5' fragments. In addition, product formation is inhibited by addition of cap structures at the model RNA 5' end, indicating that product formation occurs by 5'-3' exonucleolytic degradation. This degradation of a model 3' product by a 5'-3' exonuclease suggests a mechanism for the release of the U7 snRNP after processing by shortening the cut-off histone spacer sequences base paired to U7 RNA.

Item Type:

Journal Article (Original Article)

Division/Institute:

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

UniBE Contributor:

Schümperli, Daniel

Subjects:

500 Science > 570 Life sciences; biology
500 Science

ISSN:

1355-8382

Publisher:

Cold Spring Harbor Laboratory Press

Language:

English

Submitter:

Daniel Schümperli

Date Deposited:

11 Sep 2015 12:01

Last Modified:

11 Sep 2015 12:01

PubMed ID:

9740123

URI:

https://boris.unibe.ch/id/eprint/71623

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