Specificities of Caenorhabditis elegans and human hairpin binding proteins for the first nucleotide in the histone mRNA hairpin loop.

Michel, F; Schümperli, Daniel; Müller, B (2000). Specificities of Caenorhabditis elegans and human hairpin binding proteins for the first nucleotide in the histone mRNA hairpin loop. RNA - a publication of the RNA Society, 6(11), pp. 1539-1550. Cold Spring Harbor Laboratory Press

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The 3' ends of animal replication-dependent histone mRNAs are formed by endonucleolytic cleavage of the primary transcripts downstream of a highly conserved RNA hairpin. The hairpin-binding protein (HBP) binds to this RNA element and is involved in histone RNA 3' processing. A minimal RNA-binding domain (RBD) of approximately 73 amino acids that has no similarity with other known RNA-binding motifs was identified in human HBP [Wang Z-F et al., Genes & Dev, 1996, 10:3028-3040]. The primary sequence identity between human and Caenorhabditis elegans RBDs is 55% compared to 38% for the full-length proteins. We analyzed whether differences between C. elegans and human HBP and hairpins are reflected in the specificity of RNA binding. The C. elegans HBP and its RBD recognize only their cognate RNA hairpins, whereas the human HBP or RBD can bind both the mammalian and the C. elegans hairpins. This selectivity of C. elegans HBP is mostly mediated by the first nucleotide in the loop, which is C in C. elegans and U in all other metazoans. By converting amino acids in the human RBD to the corresponding C. elegans residues at places where the latter deviates from the consensus, we could identify two amino acid segments that contribute to selectivity for the first nucleotide of the hairpin loop.

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:	14 Sep 2015 10:11
Last Modified:	05 Dec 2022 14:49
PubMed ID:	11105754
URI:	https://boris.unibe.ch/id/eprint/71619