Our long-term goal is to investigate the mechanisms cells use to accomplish signal transduction processes through computational modeling and integration of different types of information. Recent advances in large- scale genomic and proteomic techniques have generated enormous amounts of data and have drawn our attention towards a comprehensive understanding of signal transduction at the systems level. Given the incomplete and noisy data generated from these high-throughput techniques, novel computational approaches capable of incorporating multiple data sources for analyzing the genome-wide signal transduction networks are needed to fully take advantage of the rapid accumulation of data. In this study, we will develop robust Bayesian methods to integrate diverse data types for signaling network inference, primarily in the budding yeast Saccharomyces cerevisiae. Our proposed methodology will be applied for identifying protein chaperone complexes and investigating the roles of chaperones in mediating signaling pathways. The results of our method will be subject to further experimental validation. The central hypothesis of the application is that, by developing and applying Bayesian methods on heterogeneous large-scale data sources, we can successfully infer signaling networks in a genome-wide scale. We plan to test the hypothesis and accomplish the overall objective of this application by pursuing the following specific aims: 1) Develop Bayesian methods to identify protein complexes based on large-scale protein interaction data;2) Discover the associations among proteins and infer signal transduction networks by integrating information from diverse sources, including microarray gene expression data, protein interaction data and protein phosphorylation data;3) Develop user-friendly computer software to implement the proposed methods. The software will be developed, tested and distributed to the scientific community free of charge. The proposed work will represent the first major effort that extracts information from diverse large-scale datasets through data integration for inferring signal transduction networks at a genome-wide scale. Our proposed approach can be a powerful means to make the process of inferring signal transduction networks faster and easier, and produce hypotheses that guide the experimental design, leading to more informative experiments. The research will contribute to designing efficient signaling network inference methods through integrating heterogeneous data sources. The development of these methods and user-friendly software will provide useful tools to better understand how cells respond to environment changes, and more importantly, how failure of these responses leads to a variety of diseases.

Public Health Relevance

The proposed project will design computational methods to model the biological processes by which cells are influenced by external stimuli. This will allow us to further study how deleterious changes of these biological processes cause diseases, and finally offer clues on disease prevention, diagnosis, and treatment. The computational methods will be implemented in user-friendly software and will be made available to the general scientific community.

Agency
National Institute of Health (NIH)
Institute
National Library of Medicine (NLM)
Type
Research Project (R01)
Project #
5R01LM010022-04
Application #
8633474
Study Section
Biomedical Library and Informatics Review Committee (BLR)
Program Officer
Ye, Jane
Project Start
2011-03-15
Project End
2015-03-14
Budget Start
2014-03-15
Budget End
2015-03-14
Support Year
4
Fiscal Year
2014
Total Cost
$223,388
Indirect Cost
$73,668
Name
University of Texas Health Science Center Houston
Department
Neurosciences
Type
Schools of Medicine
DUNS #
800771594
City
Houston
State
TX
Country
United States
Zip Code
77225
Xu, Wenlong; Wang, Zixing; Liu, Yin (2014) The characterization of microRNA-mediated gene regulation as impacted by both target site location and seed match type. PLoS One 9:e108260
Xu, Wenlong; San Lucas, Anthony; Wang, Zixing et al. (2014) Identifying microRNA targets in different gene regions. BMC Bioinformatics 15 Suppl 7:S4
Wang, Zixing; San Lucas, F Anthony; Qiu, Peng et al. (2014) Improving the sensitivity of sample clustering by leveraging gene co-expression networks in variable selection. BMC Bioinformatics 15:153
Wang, Zixing; Xu, Wenlong; San Lucas, F Anthony et al. (2013) Incorporating prior knowledge into Gene Network Study. Bioinformatics 29:2633-40