Component
Inactivation of pyridoxal 5-phosphate by Knoevenagel condensation
Inactivation of pyridoxal 5-phosphate by Knoevenagel condensation. Species, exposure and limitations are retained in each linked claim.
1 recorded relationships. Experimental role, claim status and evidence remain attached to each record.
How nutrients influence it
Every nutrient with a recorded effect on this component, credited to the nutrient that acted rather than the chapter that recorded it. Open a nutrient to see the findings and the conditions they were measured under.
Other things that act on it
Enzymes, hormones, genes, and other components with a recorded effect. These are not nutrients, so they do not count toward the arrows above. Each finding names the chapter that recorded it.
How nutrients reach it in more than one step
Chains of two or more recorded steps that end here, grouped by the nutrient they start from. Each step is a separate finding, so a chain is a route a mechanism could take, not proof that it does.
Tracing routes…
What it does
Every recorded relationship this component is part of, grouped by its role. Plain wording comes first; the technical statement follows.
Where it participates (unsigned role)
Children with pyridoxine-dependent seizures have mutations in the ALDH7A1 gene which encodes antiquitin, these mutations abolish the activity of antiquitin as a delta-1-piperideine-6-carboxylate to alpha-aminoadipic semialdehyde dehydrogenase, the accumulating delta-1-piperideine-6-carboxylate inactivates pyridoxal 5-phosphate by forming a Knoevenagel condensation product, and measurement of urinary alpha-aminoadipic semialdehyde provides a simple way of confirming the diagnosis.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- evidence_span
- {"source_cache": "artifacts/gaba-research/16491085.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "da61b07cc71e16803fe09321738c7a6c8d2cbac0dff2b189b9f2586ce5950bfa", "start_char": 0, "end_char": 550, "text_sha256": "da61b07cc71e16803fe09321738c7a6c8d2cbac0dff2b189b9f2586ce5950bfa"}
- experimental_model
- Gene analysis and metabolite measurement in children with pyridoxine-dependent seizures
- exposure
- Naturally occurring ALDH7A1 mutations abolishing antiquitin dehydrogenase activity
- limitations
- Human genetics with a defined biochemical consequence. It establishes the chemistry of the cofactor loss; it does not measure brain GABA in the affected children.
- nutrient_topic
- GABA research collection; topical membership is not evidence of a direct clinical effect, and the sign of a GABA response depends on the chloride gradient of the cell it was measured in. · Gamma-aminobutyric acid
- organism
- Human
- plain_language
- A metabolite that piles up when one enzyme is missing chemically destroys the cofactor a different enzyme needs.
- primary_references
- [gb-p16491085] Mutations in antiquitin in individuals with pyridoxine-dependent seizures. (2006). https://pubmed.ncbi.nlm.nih.gov/16491085/ DOI: 10.1038/nm1366
- tissue_or_cell_type
- Whole body
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Gene analysis and metabolite measurement in children with pyridoxine-dependent seizures · source_derived_draft · unverified_draft
### gb-a-metabolite-destroys-the-cofactor Children with pyridoxine-dependent seizures have mutations in the ALDH7A1 gene which encodes antiquitin, these mutations abolish the activity of antiquitin as a delta-1-piperideine-6-carboxylate to alpha-aminoadipic semialdehyde dehydrogenase, the accumulating delta-1-piperideine-6-carboxylate inactivates pyridoxal 5-phosphate by forming a Knoevenagel condensation product, and measurement of urinary alpha-aminoadipic semialdehyde provides a simple way of confirming the diagnosis. Condition category: machinery_impairment nutrient_topic: GABA research collection; topical membership is not evidence of a direct clinical effect, and the sign of a GABA response depends on the chloride gradient of the cell it was measured in. plain_language: A metabolite that piles up when one enzyme is missing chemically destroys the cofactor a different enzyme needs. organism: Human tissue_or_cell_type: Whole body experimental_model: Gene analysis and metabolite measurement in children with pyridoxine-dependent seizures limitations: Human genetics with a defined biochemical consequence. It establishes the chemistry of the cofactor loss; it does not measure brain GABA in the affected children. exposure: Naturally occurring ALDH7A1 mutations abolishing antiquitin dehydrogenase activity evidence_span: {"source_cache": "artifacts/gaba-research/16491085.abstract.txt", "locator": "Indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "da61b07cc71e16803fe09321738c7a6c8d2cbac0dff2b189b9f2586ce5950bfa", "start_char": 0, "end_char": 550, "text_sha256": "da61b07cc71e16803fe09321738c7a6c8d2cbac0dff2b189b9f2586ce5950bfa"} [gb-p16491085] Mutations in antiquitin in individuals with pyridoxine-dependent seizures. (2006). https://pubmed.ncbi.nlm.nih.gov/16491085/ DOI: 10.1038/nm1366
Complete structured claim and evidence
The events it takes part in
A mechanism often involves more than two components. These are the full events, with every participant and its role.
Situations it appears in
Low-supply and faulty-machinery situations recorded in the chapters where this component plays a part.
In the sources
Preserved passages that mention this component, quoted exactly. Open one to read it in context.
Open hypotheses
Proposed ideas that involve this component. They are labeled as hypotheses and do not change any recorded statement.
This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.