FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term gamma-aminobutyrate shunt ID (Ontology) GO:0006540 (Gene Ontology)
Definition The chemical reactions and pathways resulting in the formation of succinate from L-glutamate. Also known as GABA (gamma-aminobutyrate) shunt since it channels glutamate into the TCA cycle bypassing two steps of that cycle. There are three enzymes involved in the GABA shunt: glutamate decarboxylase (GAD), GABA aminotransferase (GABA-TA), and succinate semialdehyde dehydrogenase (SSADH). These three enzymes acting in concert to convert glutamate into succinate. The GABA shunt is predominantly associated with neurotransmission in the mammalian brain. It is also present in nonneuronal cells, in plants, in unicellular eukaryotes, and in prokaryotes.[ PubMed:12740438 ]
Also Known As "4-aminobutyrate shunt" ; "degradation of glutamate to succinate through GABA" ; "GABA shunt" (for all, see Synonyms field below)
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glutamate metabolic process
 |__L-glutamate catabolic process___________
dicarboxylic acid metabolic process         |
 |__succinate metabolic process_____________|
dicarboxylic acid catabolic process         |
 |__L-glutamate catabolic process___________|
L-amino acid catabolic process              |
 |__L-glutamate catabolic process___________|
proteinogenic amino acid catabolic process  |
 |__L-glutamate catabolic process___________|
                                            gamma-aminobutyrate shunt
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Is a succinate metabolic process
L-glutamate catabolic process
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Synonyms
  • "4-aminobutyrate shunt" EXACT
    "degradation of glutamate to succinate through GABA" EXACT
    "GABA shunt" EXACT
    "gamma aminobutyrate shunt" EXACT
    "glutamate decarboxylation to succinate" EXACT
    "glutamate degradation via 4-aminobutyrate" EXACT
    "glutamate degradation via GABA" EXACT
Secondary IDs
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MetaCyc:GLUDEG-I-PWY