|
| 1 | +import cobra |
| 2 | +import copy |
| 3 | +from commodelpy.commodelpy import Community, SingleModel, create_community_model_with_balanced_growth |
| 4 | +from typing import Dict |
| 5 | + |
| 6 | +growth_rate = 0.4 |
| 7 | +# ecolicore double model |
| 8 | +# with internal exchanges for everything in the periplasm |
| 9 | +ecoli_model = cobra.io.read_sbml_model( |
| 10 | + "./publication_runs/ecoli_models/original_sbml_models/iML1515.xml") |
| 11 | + |
| 12 | +# Deactivate all C sources except of glucose |
| 13 | +ecoli_model.reactions.EX_succ_e.lower_bound = 0 |
| 14 | +ecoli_model.reactions.EX_glyc_e.lower_bound = 0 |
| 15 | +ecoli_model.reactions.EX_ac_e.lower_bound = 0 |
| 16 | + |
| 17 | +# Test model with FBA |
| 18 | +with ecoli_model: |
| 19 | + print("Single model FBA solution:") |
| 20 | + fba_solution = ecoli_model.optimize() |
| 21 | + print(ecoli_model.summary()) |
| 22 | + for reaction in ecoli_model.reactions: |
| 23 | + if not reaction.id.startswith("EX_"): |
| 24 | + continue |
| 25 | + if fba_solution.fluxes[reaction.id] != 0: |
| 26 | + print(f"{reaction.id}: {fba_solution.fluxes[reaction.id] }") |
| 27 | + print("~~~") |
| 28 | + |
| 29 | +# Define essential and periplasmic metabolites (essential metabolites |
| 30 | +# were found by FBAs beforehand) |
| 31 | +essential_in_metabolites = [ |
| 32 | + "fe2_e", |
| 33 | + "nh4_e", |
| 34 | + "cu2_e", |
| 35 | + "glc__D_e", |
| 36 | + "o2_e", |
| 37 | + "pi_e", |
| 38 | + "so4_e", |
| 39 | + "h_e", |
| 40 | + "h2o_e", |
| 41 | +] |
| 42 | +essential_out_metabolites = [ |
| 43 | + "co2_e", |
| 44 | + "meoh_e", |
| 45 | + "ac_e", |
| 46 | + "h_e", |
| 47 | + "h2o_e", |
| 48 | + "etoh_e", |
| 49 | + "succ_e", |
| 50 | + "lac__D_e", |
| 51 | + "for_e", |
| 52 | +] |
| 53 | +all_essential_metabolites = list( |
| 54 | + set(essential_in_metabolites+essential_out_metabolites)) |
| 55 | +essential_metabolite_mapping: Dict[str, str] = {} |
| 56 | +for met in essential_in_metabolites+essential_out_metabolites: |
| 57 | + essential_metabolite_mapping[met] = (met+"\b").replace("_e\b", "") |
| 58 | + |
| 59 | +periplasmic_metabolites = [ |
| 60 | + x for x in ecoli_model.metabolites if x.id.endswith("_p")] |
| 61 | +periplasmic_metabolites_cut = [(x.id+"\b").replace("_p\b", "") |
| 62 | + for x in periplasmic_metabolites] |
| 63 | +periplasmic_metabolites += [x for x in ecoli_model.metabolites |
| 64 | + if x.id.endswith("_c") and (((x.id+"\b").replace("_c\b", "") not in periplasmic_metabolites_cut))] |
| 65 | +periplasmic_metabolites = [x for x in periplasmic_metabolites |
| 66 | + if (((x.id+"\b").replace("_c\b", "_e") not in all_essential_metabolites)) and |
| 67 | + (((x.id+"\b").replace("_p\b", "_e") not in all_essential_metabolites))] |
| 68 | +all_input_metabolite_ids = [] |
| 69 | +all_output_metabolite_ids = [] |
| 70 | +all_inout_metabolite_ids_mapping: Dict[str, str] = {} |
| 71 | +for periplasmic_metabolite in periplasmic_metabolites: |
| 72 | + metabolite_id = periplasmic_metabolite.id |
| 73 | + all_input_metabolite_ids.append(metabolite_id) |
| 74 | + all_output_metabolite_ids.append(metabolite_id) |
| 75 | + all_inout_metabolite_ids_mapping[metabolite_id] = ( |
| 76 | + metabolite_id+"\b").replace("_p\b", "").replace("_c\b", "") |
| 77 | + |
| 78 | +combined_input_metabolite_ids = list(set( |
| 79 | + all_input_metabolite_ids + essential_in_metabolites + essential_out_metabolites)) |
| 80 | +combined_output_metabolite_ids = list(set( |
| 81 | + all_output_metabolite_ids + essential_out_metabolites + essential_in_metabolites)) |
| 82 | +combined_metabolite_ids_mapping = { |
| 83 | + **all_inout_metabolite_ids_mapping, **essential_metabolite_mapping} |
| 84 | + |
| 85 | +# Define commodelpy SingleModel |
| 86 | +ecoli_1 = SingleModel( |
| 87 | + cobra_model=ecoli_model, |
| 88 | + species_abbreviation="ecoli1", |
| 89 | + objective_reaction_id="BIOMASS_Ec_iML1515_core_75p37M", |
| 90 | + exchange_reaction_id_prefix="EX_", |
| 91 | + input_metabolite_ids=combined_input_metabolite_ids, |
| 92 | + output_metabolite_ids=combined_output_metabolite_ids, |
| 93 | + model_metabolite_to_exchange_id_mapping=combined_metabolite_ids_mapping, |
| 94 | +) |
| 95 | +# Double it :D |
| 96 | +ecoli_2 = copy.deepcopy(ecoli_1) |
| 97 | +ecoli_2.species_abbreviation = "ecoli2" |
| 98 | + |
| 99 | +# Create community model :D |
| 100 | +print("===\nGeneration of community model...") |
| 101 | +potential_product_metabolites = [x for x in periplasmic_metabolites] |
| 102 | +potential_product_metabolite_ids = [ |
| 103 | + (x.id+"\b").replace("_p\b", "").replace("_c\b", "") for x in potential_product_metabolites] |
| 104 | + |
| 105 | +community = Community( |
| 106 | + single_models=[ecoli_1, ecoli_2], |
| 107 | + exchange_compartment_id="exchg", |
| 108 | + exchange_reaction_id_prefix="EX_C_", |
| 109 | + input_metabolite_ids=[(x+"\b").replace("_e\b", "") |
| 110 | + for x in essential_in_metabolites], |
| 111 | + output_metabolite_ids=[(x+"\b").replace("_e\b", "").replace("\b", "") |
| 112 | + for x in essential_out_metabolites+potential_product_metabolite_ids] |
| 113 | +) |
| 114 | +community_model = create_community_model_with_balanced_growth( |
| 115 | + community, growth_rate) |
| 116 | + |
| 117 | + |
| 118 | +cobra.io.write_sbml_model( |
| 119 | + community_model, "./balanced_growth_example/models/community_model.xml") |
| 120 | + |
| 121 | +with community_model: |
| 122 | + community_model.optimize() |
| 123 | + print(community_model.summary()) |
| 124 | + |
| 125 | + |
| 126 | +def run(): |
| 127 | + pass |
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