Functional importance of conserved nucleotides at the histone RNA 3' processing site.

Furger, A; Schaller, A; Schümperli, Daniel (1998). Functional importance of conserved nucleotides at the histone RNA 3' processing site. RNA - a publication of the RNA Society, 4(3), pp. 246-256. Cold Spring Harbor Laboratory Press

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Histone pre-mRNA 3' processing is controlled by a hairpin element preceding the processing site that interacts with a hairpin-binding protein (HBP) and a downstream spacer element that serves as anchoring site for the U7 snRNP. In addition, the nucleotides following the hairpin and surrounding the processing site (ACCCA'CA) are conserved among vertebrate histone genes. Single to triple nucleotide mutations of this sequence were tested for their ability to be processed in nuclear extract from animal cells. Changing the first four nucleotides had no qualitative and little if any quantitative effects on histone RNA 3' processing in mouse K21 cell extract, where processing of this gene is virtually independent of the HBP. A gel mobility shift assay revealing HBP interactions and a processing assay in HeLa cell extract (where the contribution of HBP to efficient processing is more important) showed that only one of these mutations, predicted to extend the hairpin by one base pair, affected the interaction with HBP. Mutations in the next three nucleotides affected both the cleavage efficiency and the choice of processing sites. Analysis of these novel sites indicated a preference for the nucleotide 5' of the cleavage site in the order A > C > U > G. Moreover, a guanosine in the 3' position inhibited cleavage. The preference for an A is shared with the cleavage/polyadenylation reaction, but the preference order for the other nucleotides is different [Chen F, MacDonald CC, Wilusz J, 1995, Nucleic Acids Res 23:2614-2620].

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 11:49
Last Modified:	05 Dec 2022 14:49
PubMed ID:	9510327
URI:	https://boris.unibe.ch/id/eprint/71626