Nucleic Acids Research, Vol 24, Issue 23 4709-4718, Copyright © 1996 by Oxford University Press
J Kleffe, K Hermann, W Vahrson, B Wittig and V Brendel
Pre-mRNA splicing in plants, while generally similar to the processes in
vertebrates and yeast, is thought to involve plant specific cis- acting
elements. Both monocot and dicot introns are typically strongly enriched in
U nucleotides, and AU- or U-rich segments are thought to be involved in
intron recognition, splice site selection, and splicing efficiency. We have
applied logitlinear models to find optimal combinations of splice site
variables for the purpose of separating true splice sites from a large
excess of potential sites. It is shown that plant splice site prediction
from sequence inspection is greatly improved when compositional contrast
between exons and introns is considered in addition to degree of matching
to the splice site consensus (signal quality). The best model involves
subclassification of splice sites according to the identity of the base
immediately upstream of the GU and AG signals and gives substantial
performance gains compared with conventional profile methods.
ARTICLES
Logitlinear models for the prediction of splice sites in plant pre-mRNA sequences
Freie Universitat Berlin, Institut fur Molekularbiologie und Biochemie, Germany.
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