Systematic Planning of Genome-Scale Experiments in Poorly Studied Species
Publication Date
March 05, 2010
Journal
PLOS Computational Biology
Authors
Yuanfang Guan, Maitreya Dunham, Amy Caudy & Olga Troyanskaya
Volume
6
Issue
3
Pages
e1000698
DOI
https://dx.plos.org/10.1371/journal.pcbi.1000698
Publisher URL
http://journals.plos.org/ploscompbiol/article?id=10.1371%2Fjournal.pcbi.1000698
PubMed
http://www.ncbi.nlm.nih.gov/pubmed/20221257
PubMed Central
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2832676
Europe PMC
http://europepmc.org/abstract/MED/20221257
Web of Science
000278125200006
Scopus
77950850438
Mendeley
http://www.mendeley.com/research/systematic-planning-genomescale-experiments-poorly-studied-species
Events
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CiteULike | Further Information

Mendeley | Further Information

{"title"=>"Systematic planning of genome-scale experiments in poorly studied species", "type"=>"journal", "authors"=>[{"first_name"=>"Yuanfang", "last_name"=>"Guan", "scopus_author_id"=>"16301203500"}, {"first_name"=>"Maitreya", "last_name"=>"Dunham", "scopus_author_id"=>"26643449900"}, {"first_name"=>"Amy", "last_name"=>"Caudy", "scopus_author_id"=>"6603454544"}, {"first_name"=>"Olga", "last_name"=>"Troyanskaya", "scopus_author_id"=>"6602361421"}], "year"=>2010, "source"=>"PLoS Computational Biology", "identifiers"=>{"issn"=>"1553734X", "pui"=>"358620670", "doi"=>"10.1371/journal.pcbi.1000698", "sgr"=>"77950850438", "scopus"=>"2-s2.0-77950850438", "isbn"=>"1553-734X", "pmid"=>"20221257"}, "id"=>"68a63815-b280-3c26-8603-c15644676e1b", "abstract"=>"Genome-scale datasets have been used extensively in model organisms to screen for specific candidates or to predict functions for uncharacterized genes. However, despite the availability of extensive knowledge in model organisms, the planning of genome-scale experiments in poorly studied species is still based on the intuition of experts or heuristic trials. We propose that computational and systematic approaches can be applied to drive the experiment planning process in poorly studied species based on available data and knowledge in closely related model organisms. In this paper, we suggest a computational strategy for recommending genome-scale experiments based on their capability to interrogate diverse biological processes to enable protein function assignment. To this end, we use the data-rich functional genomics compendium of the model organism to quantify the accuracy of each dataset in predicting each specific biological process and the overlap in such coverage between different datasets. Our approach uses an optimized combination of these quantifications to recommend an ordered list of experiments for accurately annotating most proteins in the poorly studied related organisms to most biological processes, as well as a set of experiments that target each specific biological process. The effectiveness of this experiment- planning system is demonstrated for two related yeast species: the model organism Saccharomyces cerevisiae and the comparatively poorly studied Saccharomyces bayanus. Our system recommended a set of S. bayanus experiments based on an S. cerevisiae microarray data compendium. In silico evaluations estimate that less than 10% of the experiments could achieve similar functional coverage to the whole microarray compendium. This estimation was confirmed by performing the recommended experiments in S. bayanus, therefore significantly reducing the labor devoted to characterize the poorly studied genome. This experiment-planning framework could readily be adapted to the design of other types of large-scale experiments as well as other groups of organisms.", "link"=>"http://www.mendeley.com/research/systematic-planning-genomescale-experiments-poorly-studied-species", "reader_count"=>68, "reader_count_by_academic_status"=>{"Professor > Associate Professor"=>4, "Researcher"=>24, "Student > Ph. D. Student"=>28, "Other"=>4, "Student > Bachelor"=>1, "Lecturer"=>1, "Lecturer > Senior Lecturer"=>1, "Professor"=>4, "Student > Postgraduate"=>1}, "reader_count_by_user_role"=>{"Professor > Associate Professor"=>4, "Researcher"=>24, "Student > Ph. D. Student"=>28, "Other"=>4, "Student > Bachelor"=>1, "Lecturer"=>1, "Lecturer > Senior Lecturer"=>1, "Professor"=>4, "Student > Postgraduate"=>1}, "reader_count_by_subject_area"=>{"Engineering"=>1, "Environmental Science"=>2, "Biochemistry, Genetics and Molecular Biology"=>12, "Agricultural and Biological Sciences"=>44, "Physics and Astronomy"=>1, "Computer Science"=>8}, "reader_count_by_subdiscipline"=>{"Engineering"=>{"Engineering"=>1}, "Physics and Astronomy"=>{"Physics and Astronomy"=>1}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>44}, "Computer Science"=>{"Computer Science"=>8}, "Biochemistry, Genetics and Molecular Biology"=>{"Biochemistry, Genetics and Molecular Biology"=>12}, "Environmental Science"=>{"Environmental Science"=>2}}, "reader_count_by_country"=>{"Canada"=>1, "Sweden"=>1, "Belgium"=>1, "United States"=>10, "Brazil"=>2, "United Kingdom"=>2, "Germany"=>2}, "group_count"=>4}

Scopus | Further Information

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Figshare

  • {"files"=>["https://ndownloader.figshare.com/files/860820"], "description"=>"<p>A. A schematic for the bootstrap cross-validation scheme. Using the selected dataset, genes could be placed into hyperdimensional space where support vector machine separates the positive and negative examples (as genes annotated to the GO term and genes not annotated). In each iteration, a set of the genes were bootstrapped as the training set, and the rest remains as the test set. The predicted values of the test set were recorded. After 25 iterations, the median predicted value for a gene when it is in the test sets were taken as the final prediction value for that gene. This value was later used for performance analysis. B. The performance (in AUC) of the top 10 datasets selected by a range of α differs in their ability to predict the GO functional SLIM biological processes. A higher trade-off factor (α) means more weight on the accuracy of the datasets and lower means a heavier penalty is placed on the overlap between them. α = 0.9 achieved the best performance in functional annotation.</p>", "links"=>[], "tags"=>["cross-validation", "determines", "trade-off", "redundancy"], "article_id"=>531277, "categories"=>["Genetics"], "users"=>["Yuanfang Guan", "Maitreya Dunham", "Amy Caudy", "Olga Troyanskaya"], "doi"=>"https://dx.doi.org/10.1371/journal.pcbi.1000698.g005", "stats"=>{"downloads"=>1, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Bootstrap_cross_validation_determines_the_trade_off_between_accuracy_and_redundancy_of_datasets_/531277", "title"=>"Bootstrap cross-validation determines the trade-off between accuracy and redundancy of datasets.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2010-03-05 00:21:17"}
  • {"files"=>["https://ndownloader.figshare.com/files/860442"], "description"=>"<p>First, the informativeness of each experiment in predicting each Gene Ontology (GO) biological process is quantified by bootstrap support vector machine (SVM). Genes in the model organism are grouped into ‘Positives’ (those annotated to the GO under study), and ‘Negatives’ (those not annotated to the GO term). The Area Under the Receiver Operating Characteristic Curve (AUC) of each experiment is estimated by bootstrap SVM, resulting in the GO-experiment matrix. Secondly, conditional mutual information (CMI) was used to quantify the overlap between pair-wise experiments. This results in a symmetric mutual information matrix. Finally, for datasets that contain a large number of arrays, we estimated the minimal number needed to achieve satisfactory function prediction results by a randomized test. The experiment planning system combines the above three aspects and recommends a final list of experimental treatments to be carried out in a related poorly-studied species.</p>", "links"=>[], "tags"=>["schematic", "genome-scale"], "article_id"=>530900, "categories"=>["Genetics"], "users"=>["Yuanfang Guan", "Maitreya Dunham", "Amy Caudy", "Olga Troyanskaya"], "doi"=>"https://dx.doi.org/10.1371/journal.pcbi.1000698.g001", "stats"=>{"downloads"=>0, "page_views"=>3, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Three_step_schematic_of_the_genome_scale_experiment_planning_procedures_/530900", "title"=>"Three-step schematic of the genome-scale experiment planning procedures.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2010-03-05 00:15:00"}
  • {"files"=>["https://ndownloader.figshare.com/files/860651"], "description"=>"<p>A. Overall demonstration of the pair-wise mutual information between datasets, with mutual information values clustered with hierarchical clustering. The mutual information between datasets is highly structured, where black blocks represent several highly overlapping datasets. B. Examples of mutual information between specific datasets. Dataset pairs generated under the same experimental treatment have very high mutual information.</p>", "links"=>[], "tags"=>["redundant", "datasets", "microarray"], "article_id"=>531106, "categories"=>["Genetics"], "users"=>["Yuanfang Guan", "Maitreya Dunham", "Amy Caudy", "Olga Troyanskaya"], "doi"=>"https://dx.doi.org/10.1371/journal.pcbi.1000698.g003", "stats"=>{"downloads"=>1, "page_views"=>5, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Conditional_mutual_information_could_quickly_identify_redundant_datasets_in_the_S_cerevisiae_microarray_repository_/531106", "title"=>"Conditional mutual information could quickly identify redundant datasets in the <i>S. cerevisiae</i> microarray repository.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2010-03-05 00:18:26"}
  • {"files"=>["https://ndownloader.figshare.com/files/427307"], "description"=>"<div><p>Genome-scale datasets have been used extensively in model organisms to screen for specific candidates or to predict functions for uncharacterized genes. However, despite the availability of extensive knowledge in model organisms, the planning of genome-scale experiments in poorly studied species is still based on the intuition of experts or heuristic trials. We propose that computational and systematic approaches can be applied to drive the experiment planning process in poorly studied species based on available data and knowledge in closely related model organisms. In this paper, we suggest a computational strategy for recommending genome-scale experiments based on their capability to interrogate diverse biological processes to enable protein function assignment. To this end, we use the data-rich functional genomics compendium of the model organism to quantify the accuracy of each dataset in predicting each specific biological process and the overlap in such coverage between different datasets. Our approach uses an optimized combination of these quantifications to recommend an ordered list of experiments for accurately annotating most proteins in the poorly studied related organisms to most biological processes, as well as a set of experiments that target each specific biological process. The effectiveness of this experiment- planning system is demonstrated for two related yeast species: the model organism <em>Saccharomyces cerevisiae</em> and the comparatively poorly studied <em>Saccharomyces bayanus</em>. Our system recommended a set of <em>S. bayanus</em> experiments based on an <em>S. cerevisiae</em> microarray data compendium. <em>In silico</em> evaluations estimate that less than 10% of the experiments could achieve similar functional coverage to the whole microarray compendium. This estimation was confirmed by performing the recommended experiments in <em>S. bayanus</em>, therefore significantly reducing the labor devoted to characterize the poorly studied genome. This experiment-planning framework could readily be adapted to the design of other types of large-scale experiments as well as other groups of organisms.</p></div>", "links"=>[], "tags"=>["systematic", "genome-scale", "experiments", "poorly", "studied"], "article_id"=>144336, "categories"=>["Genetics"], "users"=>["Yuanfang Guan", "Maitreya Dunham", "Amy Caudy", "Olga Troyanskaya"], "doi"=>"https://dx.doi.org/10.1371/journal.pcbi.1000698", "stats"=>{"downloads"=>3, "page_views"=>10, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/Systematic_Planning_of_Genome_Scale_Experiments_in_Poorly_Studied_Species/144336", "title"=>"Systematic Planning of Genome-Scale Experiments in Poorly Studied Species", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2010-03-05 01:12:16"}
  • {"files"=>["https://ndownloader.figshare.com/files/860903"], "description"=>"<p>Each panel depicts the comparison of the performance in AUC between <i>S. bayanus</i> and <i>S. cerevisiae</i>. GO functional slim terms with more than 30 genes annotated to them were included in all panels. Experimental validation in <i>S. bayanus</i> shows that 250 arrays based on the recommendations achieve a similar level of accuracy as 2569 arrays in <i>S. cerevisiae</i>. Also shown here are the comparison of performance of eight individually matched experiment pairs in <i>S. bayanus</i> and <i>S. cerevisiae</i>.</p>", "links"=>[], "tags"=>["validation"], "article_id"=>531362, "categories"=>["Genetics"], "users"=>["Yuanfang Guan", "Maitreya Dunham", "Amy Caudy", "Olga Troyanskaya"], "doi"=>"https://dx.doi.org/10.1371/journal.pcbi.1000698.g006", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Comparative_evaluation_of_the_experimental_validation_in_S_bayanus_/531362", "title"=>"Comparative evaluation of the experimental validation in <i>S. bayanus</i>.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2010-03-05 00:22:42"}
  • {"files"=>["https://ndownloader.figshare.com/files/860718"], "description"=>"<p>The performance (in AUC) of the random subsets of different numbers of arrays of the (A) Brem <i>et al.</i>, 2005 dataset and (B) Hughes <i>et al.</i>, 2000 dataset. The mean, median and standard deviation were estimated through 25 sub-samplings. C. The performance (in AUC) of different number of arrays from the Brem <i>et al.</i> dataset in predicting different biological processes. The performance of the randomly selected subsets is defined as the average AUC of the GO functional slim biological processes.</p>", "links"=>[], "tags"=>["arrays", "large-scale", "experiments"], "article_id"=>531178, "categories"=>["Genetics"], "users"=>["Yuanfang Guan", "Maitreya Dunham", "Amy Caudy", "Olga Troyanskaya"], "doi"=>"https://dx.doi.org/10.1371/journal.pcbi.1000698.g004", "stats"=>{"downloads"=>0, "page_views"=>1, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_A_small_number_of_arrays_in_some_of_the_very_large_scale_experiments_are_sufficient_for_function_prediction_/531178", "title"=>"A small number of arrays in some of the very large-scale experiments are sufficient for function prediction.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2010-03-05 00:19:38"}
  • {"files"=>["https://ndownloader.figshare.com/files/860539"], "description"=>"<p>A. The performance (in AUC) of each of the top 10 datasets (in order) recommended by the planning system in predicting different biological processes. B. The performance (in AUC) for the prediction for all GO biological process terms by the entire <i>S. cerevisiae</i> microarray repository, clustered by hierarchical clustering. Datasets are very different in their relative performance for different biological processes. Some of the biological processes are well-covered by a variety of experiment treatments, while the majority are only covered by a small fraction of the datasets.</p>", "links"=>[], "tags"=>["datasets", "signals", "overlapping"], "article_id"=>530994, "categories"=>["Genetics"], "users"=>["Yuanfang Guan", "Maitreya Dunham", "Amy Caudy", "Olga Troyanskaya"], "doi"=>"https://dx.doi.org/10.1371/journal.pcbi.1000698.g002", "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Microarray_datasets_contain_signals_for_different_yet_overlapping_biological_processes_/530994", "title"=>"Microarray datasets contain signals for different yet overlapping biological processes.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2010-03-05 00:16:34"}
  • {"files"=>["https://ndownloader.figshare.com/files/861064"], "description"=>"<p>A. Comparison to the performance of randomly selected subsets of the entire expression data repository in <i>S. cerevisiae</i>, the recommended datasets, and the recommended experiments carried out in <i>S. bayanus</i>. B. Recommended experiments in the second round in <i>S. bayanus</i> significantly improved weakly represented terms from the first round. Based on the evaluation results in the first round in <i>S. bayanus</i>, we re-designed several microarray experiments for the weakly-predicted terms in the first round. We found that adding these ∼50 experiments to the compendium improved the predictions on the previously weakly predicted terms.</p>", "links"=>[], "tags"=>["experiments", "functions"], "article_id"=>531519, "categories"=>["Genetics"], "users"=>["Yuanfang Guan", "Maitreya Dunham", "Amy Caudy", "Olga Troyanskaya"], "doi"=>"https://dx.doi.org/10.1371/journal.pcbi.1000698.g007", "stats"=>{"downloads"=>1, "page_views"=>7, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Recommended_experiments_can_more_accurately_predict_functions_than_a_random_selection_of_the_data_repository_/531519", "title"=>"Recommended experiments can more accurately predict functions than a random selection of the data repository.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2010-03-05 00:25:19"}

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