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Identification of Five Putative Yeast RNA Helicase Genes

Chang, Tien-Hsien and Arenas, Jaime and Abelson, John (1990) Identification of Five Putative Yeast RNA Helicase Genes. Proceedings of the National Academy of Sciences of the United States of America, 87 (4). pp. 1571-1575. ISSN 0027-8424. http://resolver.caltech.edu/CaltechAUTHORS:CHApnas90a

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Abstract

The RNA helicase gene family encodes a group of eight homologous proteins that share regions of sequence similarity. This group of evolutionarily conserved proteins presumably all utilize ATP (or some other nucleoside triphosphate) as an energy source for unwinding double-stranded RNA. Members of this family have been implicated in a variety of physiological functions in organisms ranging from Escherichia coli to human, such as translation initiation, mitochondrial mRNA splicing, ribosomal assembly, and germinal line cell differentiation. We have applied polymerase chain reaction technology to search for additional members of the RNA helicase family in the yeast Saccharomyces cerevisiae. Using degenerate oligonucleotide primers designed to amplify DNA fragments flanked by the highly conserved motifs V L D E A D and Y I H R I G, we have detected five putative RNA helicase genes. Northern and Southern blot analyses demonstrated that these genes are single copy and expressed in yeast. Several members of the RNA helicase family share sequence identity ranging from 49.2% to 67.2%, suggesting that they are functionally related. The discovery of such a multitude of putative RNA helicase genes in yeast suggests that RNA helicase activities are involved in a variety of fundamentally important biological processes.


Item Type:Article
Additional Information:Copyright © 1990 by National Academy of Sciences. Contributed by John Abelson, December 5, 1989. We thank N. Gautam and T. Wilkie for valuable discussions in using PCR techniques, and A. R. Sachs for communication of SPB4 sequence prior to publication. We also thank C. Ho, D. McPheeters, and C. O'Day for critical reading of the manuscript. T.-H.C. is supported by a Postdoctoral Fellowship from Merck Sharp & Dohme Research Laboratories. This work is supported by a grant awarded to J. Abelson from the National Institutes of Health. The publication costs of this article were defrayed in part by page charge payment. This article must therefore be hereby marked "advertisement" in accordance with 18 U.S.C. §1734 solely to indicate this fact.
Subject Keywords:gene family; degenerate oligonucleotides; polymerase chain reaction
Record Number:CaltechAUTHORS:CHApnas90a
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:CHApnas90a
Alternative URL:http://www.pnas.org/cgi/content/abstract/87/4/1571
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:9908
Collection:CaltechAUTHORS
Deposited By: Archive Administrator
Deposited On:26 Mar 2008
Last Modified:14 Nov 2014 19:20

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