pyruvate fermentation to acetoin III
gomodel:YeastPathways_PWY3O-440
Pyruvate fermentation to acetoin III in Saccharomyces cerevisiae S288C uses PDC1, PDC5, and PDC6 pyruvate decarboxylase activities to convert pyruvate through acetaldehyde to acetoin and carbon dioxide.
- Pathway type
- acetoin biosynthesis
- Organism scope
Pathway network
23 nodes · 80 asserted directed edges
Arrows show recorded subject → object relationships, not necessarily metabolic flow. Select a node for details or an arrow for evidence. Scroll, zoom or find a node to explore.
- Reaction / activity
- Chemical / cofactor
- Protein / complex
- Cell / process context
- Solid arrow: mechanistic relation
- Dashed arrow: membership, location or cofactor relation
Components and activities
| Node | Kind or role | Source direction |
|---|---|---|
Saccharomyces cerevisiae S288CNCBITaxon:559292 | taxon | |
cytosolGO:0005829 | cellular component | |
hydronCHEBI:15378 | small molecule | |
acetoin biosynthetic processGO:0045151 | biological process | |
PDC1 ScerSGD:S000004034 | protein | |
pyruvateCHEBI:15361 | small molecule | |
acetaldehydeCHEBI:15343 | small molecule | |
acetoinCHEBI:15688 | small molecule | |
carbon dioxideCHEBI:16526 | small molecule | |
PDC6 ScerSGD:S000003319 | protein | |
PDC5 ScerSGD:S000004124 | protein | |
cytoplasmGO:0005737 | cellular component | |
nucleusGO:0005634 | cellular component | |
magnesium(2+)CHEBI:18420 | cofactor | |
thiamine(1+) diphosphate(3-)CHEBI:58937 | cofactor | |
pyruvate + H+ -> acetaldehyde + CO2gomodel:RXN-6161 | molecular activity | |
pyruvate + acetaldehyde + H+ -> acetoin + CO2gomodel:RXN0-2022 | molecular activity | |
2 acetaldehyde -> acetoingomodel:RXN3O-470 | molecular activity | |
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000822 | molecular activity | |
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000833 | molecular activity | |
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000854 | molecular activity | |
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000863 | molecular activity | |
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000876 | molecular activity | |
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000890 | molecular activity |
Mechanistic edges
| Subject | Predicate and description | Object | Evidence |
|---|---|---|---|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000890 | occurs_in | cytosolGO:0005829 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000822 | has_input | hydronCHEBI:15378 |
|
pyruvate + H+ -> acetaldehyde + CO2gomodel:RXN-6161 | causally_upstream_of | pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000890 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000863 | part_of | acetoin biosynthetic processGO:0045151 |
|
pyruvate + H+ -> acetaldehyde + CO2gomodel:RXN-6161 | causally_upstream_of | pyruvate + acetaldehyde + H+ -> acetoin + CO2gomodel:RXN0-2022 |
|
PDC1 ScerSGD:S000004034 | enables | pyruvate + H+ -> acetaldehyde + CO2gomodel:RXN-6161 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000876 | has_input | pyruvateCHEBI:15361 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000876 | has_input | hydronCHEBI:15378 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000890 | has_input | pyruvateCHEBI:15361 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000822 | causally_upstream_of | pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000876 |
|
pyruvate + acetaldehyde + H+ -> acetoin + CO2gomodel:RXN0-2022 | occurs_in | cytosolGO:0005829 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000890 | has_input | acetaldehydeCHEBI:15343 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000822 | has_output | acetaldehydeCHEBI:15343 |
|
PDC1 ScerSGD:S000004034 | enables | 2 acetaldehyde -> acetoingomodel:RXN3O-470 |
|
2 acetaldehyde -> acetoingomodel:RXN3O-470 | part_of | acetoin biosynthetic processGO:0045151 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000876 | has_input | acetaldehydeCHEBI:15343 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000833 | has_input | pyruvateCHEBI:15361 |
|
2 acetaldehyde -> acetoingomodel:RXN3O-470 | occurs_in | cytosolGO:0005829 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000833 | causally_upstream_of | pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000890 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000863 | occurs_in | cytosolGO:0005829 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000833 | causally_upstream_of | pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000876 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000863 | has_input | acetaldehydeCHEBI:15343 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000890 | part_of | acetoin biosynthetic processGO:0045151 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000890 | has_output | acetoinCHEBI:15688 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000833 | causally_upstream_of | pyruvate + acetaldehyde + H+ -> acetoin + CO2gomodel:RXN0-2022 |
|
pyruvate + acetaldehyde + H+ -> acetoin + CO2gomodel:RXN0-2022 | has_output | carbon dioxideCHEBI:16526 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000854 | occurs_in | cytosolGO:0005829 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000822 | occurs_in | cytosolGO:0005829 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000890 | has_output | carbon dioxideCHEBI:16526 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000876 | part_of | acetoin biosynthetic processGO:0045151 |
|
pyruvate + H+ -> acetaldehyde + CO2gomodel:RXN-6161 | part_of | acetoin biosynthetic processGO:0045151 |
|
pyruvate + H+ -> acetaldehyde + CO2gomodel:RXN-6161 | has_output | acetaldehydeCHEBI:15343 |
|
pyruvate + H+ -> acetaldehyde + CO2gomodel:RXN-6161 | has_output | carbon dioxideCHEBI:16526 |
|
PDC6 ScerSGD:S000003319 | enables | pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000890 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000833 | has_output | acetaldehydeCHEBI:15343 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000876 | has_output | carbon dioxideCHEBI:16526 |
|
pyruvate + acetaldehyde + H+ -> acetoin + CO2gomodel:RXN0-2022 | has_input | pyruvateCHEBI:15361 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000876 | has_output | acetoinCHEBI:15688 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000822 | has_input | pyruvateCHEBI:15361 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000822 | has_output | carbon dioxideCHEBI:16526 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000876 | occurs_in | cytosolGO:0005829 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000822 | causally_upstream_of | pyruvate + acetaldehyde + H+ -> acetoin + CO2gomodel:RXN0-2022 |
|
pyruvate + H+ -> acetaldehyde + CO2gomodel:RXN-6161 | occurs_in | cytosolGO:0005829 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000890 | has_input | hydronCHEBI:15378 |
|
PDC5 ScerSGD:S000004124 | enables | pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000876 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000863 | has_output | acetoinCHEBI:15688 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000833 | has_input | hydronCHEBI:15378 |
|
2 acetaldehyde -> acetoingomodel:RXN3O-470 | has_output | acetoinCHEBI:15688 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000833 | occurs_in | cytosolGO:0005829 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000833 | part_of | acetoin biosynthetic processGO:0045151 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000854 | has_output | acetoinCHEBI:15688 |
|
PDC6 ScerSGD:S000003319 | enables | pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000833 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000854 | has_input | acetaldehydeCHEBI:15343 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000822 | causally_upstream_of | pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000890 |
|
pyruvate + H+ -> acetaldehyde + CO2gomodel:RXN-6161 | causally_upstream_of | pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000876 |
|
PDC6 ScerSGD:S000003319 | enables | pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000863 |
|
pyruvate + H+ -> acetaldehyde + CO2gomodel:RXN-6161 | has_input | pyruvateCHEBI:15361 |
|
2 acetaldehyde -> acetoingomodel:RXN3O-470 | has_input | acetaldehydeCHEBI:15343 |
|
PDC5 ScerSGD:S000004124 | enables | pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000822 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000833 | has_output | carbon dioxideCHEBI:16526 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000822 | part_of | acetoin biosynthetic processGO:0045151 |
|
PDC1 ScerSGD:S000004034 | enables | pyruvate + acetaldehyde + H+ -> acetoin + CO2gomodel:RXN0-2022 |
|
pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000854 | part_of | acetoin biosynthetic processGO:0045151 |
|
pyruvate + acetaldehyde + H+ -> acetoin + CO2gomodel:RXN0-2022 | has_input | hydronCHEBI:15378 |
|
pyruvate + acetaldehyde + H+ -> acetoin + CO2gomodel:RXN0-2022 | part_of | acetoin biosynthetic processGO:0045151 |
|
pyruvate + acetaldehyde + H+ -> acetoin + CO2gomodel:RXN0-2022 | has_input | acetaldehydeCHEBI:15343 |
|
pyruvate + H+ -> acetaldehyde + CO2gomodel:RXN-6161 | has_input | hydronCHEBI:15378 |
|
pyruvate + acetaldehyde + H+ -> acetoin + CO2gomodel:RXN0-2022 | has_output | acetoinCHEBI:15688 |
|
PDC5 ScerSGD:S000004124 | enables | pyruvate decarboxylase activitygomodel:YeastPathways_PWY3O-440/6a46ef0600000854 |
|
PDC1 ScerSGD:S000004034 | located_in Physical protein location from reviewed UniProt. ECO:0000269 (PubMed:14562095) | cytoplasmGO:0005737 |
|
PDC1 ScerSGD:S000004034 | located_in Physical protein location from reviewed UniProt. ECO:0000269 (PubMed:14562095) | nucleusGO:0005634 |
|
PDC6 ScerSGD:S000003319 | located_in Physical protein location from reviewed UniProt. ECO:0000269 (PubMed:14562095) | cytoplasmGO:0005737 |
|
PDC5 ScerSGD:S000004124 | located_in Physical protein location from reviewed UniProt. ECO:0000269 (PubMed:14562095) | cytoplasmGO:0005737 |
|
PDC5 ScerSGD:S000004124 | located_in Physical protein location from reviewed UniProt. ECO:0000269 (PubMed:14562095) | nucleusGO:0005634 |
|
PDC1 ScerSGD:S000004034 | has_cofactor UniProtKB reviewed (Swiss-Prot) annotation. UniProt evidence: ECO:0000269 (PubMed:10651824) Binds 1 Mg(2+) per subunit. UniProt note evidence: ECO:0000269 (PubMed:10651824) | magnesium(2+)CHEBI:18420 |
|
PDC1 ScerSGD:S000004034 | has_cofactor UniProtKB reviewed (Swiss-Prot) annotation. UniProt evidence: ECO:0000269 (PubMed:10651824) Binds 1 thiamine pyrophosphate per subunit. UniProt note evidence: ECO:0000269 (PubMed:10651824) | thiamine(1+) diphosphate(3-)CHEBI:58937 |
|
PDC6 ScerSGD:S000003319 | has_cofactor UniProtKB reviewed (Swiss-Prot) annotation. UniProt evidence: ECO:0000250 (UniProtKB:P06169) Binds 1 Mg(2+) per subunit. UniProt note evidence: ECO:0000250 (UniProtKB:P06169) | magnesium(2+)CHEBI:18420 |
|
PDC6 ScerSGD:S000003319 | has_cofactor UniProtKB reviewed (Swiss-Prot) annotation. UniProt evidence: ECO:0000250 (UniProtKB:P06169) Binds 1 thiamine pyrophosphate per subunit. UniProt note evidence: ECO:0000250 (UniProtKB:P06169) | thiamine(1+) diphosphate(3-)CHEBI:58937 |
|
PDC5 ScerSGD:S000004124 | has_cofactor UniProtKB reviewed (Swiss-Prot) annotation. UniProt evidence: ECO:0000250 (UniProtKB:P06169) Binds 1 Mg(2+) per subunit. UniProt note evidence: ECO:0000250 (UniProtKB:P06169) | magnesium(2+)CHEBI:18420 |
|
PDC5 ScerSGD:S000004124 | has_cofactor UniProtKB reviewed (Swiss-Prot) annotation. UniProt evidence: ECO:0000250 (UniProtKB:P06169) Binds 1 thiamine pyrophosphate per subunit. UniProt note evidence: ECO:0000250 (UniProtKB:P06169) | thiamine(1+) diphosphate(3-)CHEBI:58937 |
|
References
gomodel:YeastPathways_PWY3O-440SGD GO-CAM pyruvate fermentation to acetoin III - imported from: Saccharomyces Genome Database (source version: Pinned Noctua JSON archive; model date 2026-07-06; member ./YeastPathways_PWY3O-440.json)UniProtKB:P06169Reviewed UniProtKB P06169 location annotations (source version: UniProt release 2026_03)UniProtKB:P26263Reviewed UniProtKB P26263 location annotations (source version: UniProt release 2026_03)UniProtKB:P16467Reviewed UniProtKB P16467 location annotations (source version: UniProt release 2026_03)
Curation history
- Codex; review-causal-graph; Reviewed every native GO-CAM fact; preserved precise input/output, causal, location, membership and complex-part relations with traceable structured source evidence. Kept distinct generic physical instances and recorded source-scope exclusions in the cohort review ledger.
- Codex
- EDIT — Audit causal activity compartments and preserve scoped protein location evidence
Reviewed all 9 activity location assignments and 3 mapped physical proteins against reviewed S288C UniProt release2026_03 location/function/caution batch SHA256 95f72dcc644358c480e0e59f996cf88533558b5fa4256460a030e0a1eaf9678d. Added 5 independently supported location edges and quarantined 0 generic cytosol source assertions. Mapped physical protein locations via exact SGD cross-references; retained source ECO grades, molecular form and conditional notes. Physical protein location alone never generates activity location. Explicitly inspected functional assertions support bounded activity projections. Every original activity location and exclusion is recorded in reports/causal_graph_review/gocam-location-review.json. No independent location annotation is treated as an evidence gap, not a negative result. Cytoplasm is not narrowed to cytosol. Microsome fractions are not projected as in-vivo organelles. Semantic validation passed all85 records;4 independent source-role acceptance tests passed.
- EDIT — Audit causal activity compartments and preserve scoped protein location evidence