Difference between revisions of "Compute differentially expressed genes using Hypergeometric test (Affymetrix probes) (workflow)"

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:Compute differentially expressed genes using Hypergeometric test (Affymetrix probes)
 
:Compute differentially expressed genes using Hypergeometric test (Affymetrix probes)
 
;Provider
 
;Provider
:[[GeneXplain GmbH]]
+
:[[geneXplain GmbH]]
 
== Workflow overview ==
 
== Workflow overview ==
 
[[File:Compute-differentially-expressed-genes-using-Hypergeometric-test-Affymetrix-probes-workflow-overview.png|400px]]
 
[[File:Compute-differentially-expressed-genes-using-Hypergeometric-test-Affymetrix-probes-workflow-overview.png|400px]]
 
== Description ==
 
== Description ==
This workflow is designed to identify upregulated and downregulated genes for experimental data with any number of data points for each experiment and control.  It can be used even for the cases with one data point in each experiment and control.
+
This workflow is designed to identify differentially expressed genes from an experiment data set compared to a control data set.  It can be used even for the case with one data point for each the experiment and the control. Normalized data with Affymetrix probeset IDs can be submitted as input. Such normalized files are the output of the workflow [http://test.genexplain.com/bioumlweb/#de=analyses/Methods/Data normalization/Normalize Affymetrix experiment and control Normalize Affymetrix experiment and control].
  
As input, the normalized data with Affymetrix probeset IDs can be submitted.
+
In the first step, the up- and down-regulated probes are identified and log fold change values are calculated for all probes using the ''Fold Change calculation ''analysis. This workflow applies ''Hypergeometric analysis'' for the p-value calculation.  
  
Such normalized files are resulting from the output of the “Normalize data” procedure under  “analyses/Methods/Data normalization/Normalize Affymetrix experiment and control”.
+
In addition the results are filtered by different conditions in parallel applying the ''Filter table'' method, to identify up-regulated and down-regulated Affymetrix probeset IDs. The filtering criteria are set as follows:
  
At the next step, p-value is calculated for up-and down-regulated probeset IDs. This workflow applies hypergeometric analysis for p-value calculation.
+
'''For up-regulated probes: LogFoldChange>0.5 and -log_P_value_>3.
  
Simultaneously, log fold change is calculated for each probeset ID, and as the result of this step, a table is produced in which both LogFoldChange and p-value are assigned to each probeset ID.
+
For down- regulated probes: LogFoldChange<-0.5 and -log_P_value_<-3.
  
Further, this table is filtered by several conditions in parallel, to identify upregulated, downregulated, as well as a joint table of up- & downregulated Affymetrix probeset IDs.
+
'''
  
The filtering criteria are set as the following.
+
The resulting tables of up-regulated, down-regulated, and non-changed Affymetrix probeset IDs are converted into a gene table with the ''Convert table'' method and annotated with additional information (gene descriptions, gene symbols, and species) via ''Annotate table'' method.  
  
For upregulated probes: LogFoldChange>0.5 and -log_P_value_>3.
+
A result folder is generated and automatically named corresponding to the experiment data set name. This resulting folder contains all generated tables.
  
For downregulated probes: LogFoldChange<-0.5 and -log_P_value_<-3.
+
 
 
+
For up- & downregulated probes: (LogFoldChange>0.5 and -log_P_value_>3 & LogFoldChange<-0.5 and -log_P_value_<-3)
+
 
+
Resulting tables of the upregulated, downregulated, and up- & downregulated Affymetrix probeset IDs are annotated with additional information, gene description, gene symbols, species.
+
 
+
Finally, these tables are converted into the tables of genes. Two tables are produced, with Ensembl Gene IDs and with Entrez IDs.
+
  
 
== Parameters ==
 
== Parameters ==
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;Control normalized
 
;Control normalized
 
;Species
 
;Species
 +
;Probe type
 
;Results folder
 
;Results folder
  
 
[[Category:Workflows]]
 
[[Category:Workflows]]
 +
[[Category:GeneXplain workflows]]
 
[[Category:Autogenerated pages]]
 
[[Category:Autogenerated pages]]

Latest revision as of 16:34, 12 March 2019

Workflow title
Compute differentially expressed genes using Hypergeometric test (Affymetrix probes)
Provider
geneXplain GmbH

[edit] Workflow overview

Compute-differentially-expressed-genes-using-Hypergeometric-test-Affymetrix-probes-workflow-overview.png

[edit] Description

This workflow is designed to identify differentially expressed genes from an experiment data set compared to a control data set.  It can be used even for the case with one data point for each the experiment and the control. Normalized data with Affymetrix probeset IDs can be submitted as input. Such normalized files are the output of the workflow normalization/Normalize Affymetrix experiment and control Normalize Affymetrix experiment and control.

In the first step, the up- and down-regulated probes are identified and log fold change values are calculated for all probes using the Fold Change calculation analysis. This workflow applies Hypergeometric analysis for the p-value calculation.

In addition the results are filtered by different conditions in parallel applying the Filter table method, to identify up-regulated and down-regulated Affymetrix probeset IDs. The filtering criteria are set as follows:

For up-regulated probes: LogFoldChange>0.5 and -log_P_value_>3.

For down- regulated probes: LogFoldChange<-0.5 and -log_P_value_<-3.

The resulting tables of up-regulated, down-regulated, and non-changed Affymetrix probeset IDs are converted into a gene table with the Convert table method and annotated with additional information (gene descriptions, gene symbols, and species) via Annotate table method.

A result folder is generated and automatically named corresponding to the experiment data set name. This resulting folder contains all generated tables.

 

[edit] Parameters

Experiment normalized
Control normalized
Species
Probe type
Results folder
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