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Bioinformatics Vol. 18 no. 1 2002
Pages 182-189
© 2002 Oxford University Press

Discovery Note

Association of nucleotide patterns with gene function classes: application to human 3' untranslated sequences

Darrell Conklin 1,*, Inge Jonassen 2, Rein Aasland 3 and William R. Taylor 4

1 ZymoGenetics Inc., 1201 Eastlake Avenue East, Seattle, WA 98102, USA
2 Department of Informatics
3 Department of Molecular Biology, University of Bergen, HIB, N5020 Bergen, Norway
4 Division of Mathematical Biology, National Institute for Medical Research, The Ridgeway, Mill Hill, London NW7 1AA, UK

Received on March 15, 2001 ; revised on July 24, 2001 ; accepted on September 21, 2001

Motivation: Gene expression is dependent on two main types of signals; one involving transcription factors which initiates gene transcription, and another which regulates the translation of a nascent mRNA. These post-transcriptional events play an important yet incompletely understood role in regulating gene expression and cellular behavior. Many of the identified cis acting elements for translational regulation occur within the 3'untranslated region (3'UTR), and some have been observed to occur with surprising regularity within certain protein function classes.

Results: In this study, we present a new association rule mining method for discovering nucleotide sequence patterns that appear in more sequences than expected within protein function classes. The method is applied to a database of human 3'UTR sequences, and some significant associations between nucleotide patterns and protein function classes are discovered. Among previously identified patterns, the AU-Rich Element (ARE) is found here to occur within the 3'UTR of cytokines, providing statistical validation of an association often reported in the literature. The method has also identified some GC-rich patterns, found to occur within the 3'UTR of homeodomain transcription factors and nuclear proteins. The method should be applicable to many types of regulatory element discovery.

Contact: conklin{at}zgi.com

* To whom correspondence should be addressed.


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