Nucleic Acids Research, 2003, Vol. 31, No. 14 4071-4084
© 2003 Oxford University Press
CADLIVE for constructing a large-scale biochemical network based on a simulation-directed notation and its application to yeast cell cycle
Department of Biochemical Science and Engineering, Kyushu Institute of Technology, Iizuka, 820-8502, Fukuoka, Japan
*To whom correspondence should be addressed. Tel/Fax: +81 948 29 7828; Email: kurata{at}bse.kyutech.ac.jp
The further understanding of the mechanisms of gene regulatory networks requires comprehensive tools for both the representation of complicated signal transduction pathways and the in silico identification of genomic signals that govern the regulation of gene expression. Consequently, sophisticated notation must be developed to represent the signal transduction pathways in a form that can be readily processed by both computers and humans. We propose the regulator–reaction equations combined with detailed attributes including the associated cellular component, molecular function, and biological process and present the simulation-directed graphical notation that is derived from modification of Kohn’s method. We have developed the software suite, CADLIVE (Computer-Aided Design of LIVing systEms), which features a graphical user interface (GUI) to edit large-scale maps of complicated signal transduction pathways using a conventional XML-based representation. The regulator–reaction equations represent not only mechanistic reactions, but also semantic models containing ambiguous and incomplete processes. In order to demonstrate the feasibility of CADLIVE, we constructed a detailed map of the budding yeast cell cycle, which consists of 184 molecules and 152 reactions, in a really compact space. CADLIVE enables one to look at the whole view of a large-scale map, to integrate postgenomic data into the map, and to computationally simulate the signal transduction pathways, which greatly facilitates exploring novel or unexpected interactions.
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