Basic Gene Grammars and DNA-ChartParser for language processing of Escherichia coli promoter DNA sequences.
BACKGROUND
The field of 'DNA linguistics' has emerged from pioneering work in computational linguistics and molecular biology. Most formal grammars in this field are expressed using Definite Clause Grammars but these have computational limitations which must be overcome. The present study provides a new DNA parsing system, comprising a logic grammar formalism called Basic Gene Grammars and a bidirectional chart parser DNA-ChartParser.


RESULTS
The use of Basic Gene Grammars is demonstrated in representing many formulations of the knowledge of Escherichia coli promoters, including knowledge acquired from human experts, consensus sequences, statistics (weight matrices), symbolic learning, and neural network learning. The DNA-ChartParser provides bidirectional parsing facilities for BGGs in handling overlapping categories, gap categories, approximate pattern matching, and constraints. Basic Gene Grammars and the DNA-ChartParser allowed different sources of knowledge for recognizing E.coli promoters to be combined to achieve better accuracy as assessed by parsing these DNA sequences in real-world data sets.
Leung
S
S
Division of Informatics, University of Edinburgh, 80 South Bridge, Edinburgh EH1 1HN, UK. siu@daied.ac.uk
Mellish
C
C
Robertson
D
D
D004269:DNA, Bacterial / Q000032:analysis*; D004926:Escherichia coli / Q000235:genetics*; D005798:Genes, Bacterial; D011381:Programming Languages; D011401:Promoter Regions, Genetic; D017422:Sequence Analysis, DNA; D012985:Software Design
D004269:DNA, Bacterial