feat: add model generation script

code/masterScriptFruitflyGEM.m

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+%
+% FILE NAME:    masterScriptFruitflyGEM.m
+%
+%
+% PURPOSE: This script is for reconstruction of the Fruitfly-GEM, by using
+%          the Human-GEM as template and taking into account specie-specific
+%          pathways/reactions.
+%
+%
+
+
+%% Load Human-GEM as template
+load('Human-GEM.mat');
+
+
+% convert gene identifiers from Ensembl ids to gene symbols
+[grRules,genes,rxnGeneMat] = translateGrRules(ihuman.grRules,'Name','ENSG');
+ihuman.grRules    = grRules;
+ihuman.genes      = genes;
+ihuman.rxnGeneMat = rxnGeneMat;
+
+
+
+%% Use MA reactions identifiers 
+
+% load reaction annotaiton files
+rxnAssoc = jsondecode(fileread('humanGEMRxnAssoc.JSON'));
+
+%replace reaction identifiers with MA ids if available
+ind = getNonEmptyList(rxnAssoc.rxnMAID);
+ihuman.rxns(ind) = rxnAssoc.rxnMAID(ind);
+
+
+
+%% Generate Fruitfly-GEM by using Human-GEM as template
+
+% get ortholog pairs from human to worm
+fruitflyOrthologPairs = extractAllianceGenomeOrthologs('human2FruitflyOrthologs.json');
+fruitflyGEM = getModelFromOrthology(ihuman, fruitflyOrthologPairs);
+
+
+
+%% Incorporate species-specific reactions
+
+% get metabolic networks based on the KEGG annoation using RAVEN function
+KEGG_human=getKEGGModelForOrganism('hsa');
+KEGG_fruitfly=getKEGGModelForOrganism('dme');
+
+% remove reactions shared with human
+FruitflySpecificRxns=setdiff(KEGG_fruitfly.rxns,KEGG_human.rxns);
+
+% remove reactions included in Human-GEM
+FruitflySpecificRxns=setdiff(FruitflySpecificRxns,rxnAssoc.rxnKEGGID);
+
+
+% get species-specific network for manual inspection and then
+% organize species-specific pathways into two tsv files:
+fruitflySpecificNetwork=removeReactions(KEGG_fruitfly,...
+    setdiff(KEGG_fruitfly.rxns,FruitflySpecificRxns), true, true, true);
+
+% "fruitflySpecificMets.tsv" contains species-specific metabolites
+metsToAdd = importTsvFile('fruitflySpecificMets.tsv');
+
+% "fruitflySpecificRxns.tsv" contains species-specific reactions
+rxnsToAdd = importTsvFile('fruitflySpecificRxns.tsv');
+rxnsToAdd.subSystems = cellfun(@(s) {{s}}, rxnsToAdd.subSystems);
+
+% integrate fruitfly-specific metabolic network
+[fruitflyGEM, modelChanges] = addMetabolicNetwork(fruitflyGEM, rxnsToAdd, metsToAdd);
+
+
+%% Gap-filling for biomass formation
+[fruitflyGEM, gapfillNetwork]=gapfill4EssentialTasks(fruitflyGEM,ihuman);
+% Added 39 reactions for gap-filling
+
+
+%% Save the model into mat, yml, and xml
+
+fruitflyGEM.id = 'Fruitfly-GEM';
+save('../model/Fruitfly-GEM.mat', 'fruitflyGEM');
+writeHumanYaml(fruitflyGEM, '../model/Fruitfly-GEM.mat');
+exportModel(fruitflyGEM, '../model/Fruitfly-GEM.xml');
+