Component
Human cysteine sulfinic acid decarboxylase / CSAD
Context-specific entity; species, compartment and exposure are stated on each claim.
3 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.
What it acts on
Human CSAD also catalyzed L-cysteic-acid decarboxylation to taurine in vitro.
Experimental context and source evidence
- evidence_access
- Primary full text, substrate comparison
- experimental_model
- Recombinant human enzyme; L-cysteic-acid substrate assays.
- limitations
- This alternative reaction does not quantify its contribution to human whole-body synthesis.
- nutrient_topic
- Taurine collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Taurine
- plain_language
- The same enzyme can use a more oxidized substrate to make taurine directly.
- primary_references
- A Novel, Easy Assay Method for Human Cysteine Sulfinic Acid Decarboxylase. · 2021 · https://pubmed.ncbi.nlm.nih.gov/34068845/ · DOI 10.3390/life11050438
Taurine: synthesis, transport, mitochondrial decoding and nutrient interactions (2026-09-19) · lines 49–55
AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Recombinant human enzyme; L-cysteic-acid substrate assays. · source_derived_draft · unverified_draft
## taurine-csad-cysteic-acid The same enzyme can use a more oxidized substrate to make taurine directly. Human CSAD also catalyzed L-cysteic-acid decarboxylation to taurine in vitro. Model: Recombinant human enzyme; L-cysteic-acid substrate assays. Limitations: This alternative reaction does not quantify its contribution to human whole-body synthesis. Evidence access: Primary full text, substrate comparison A Novel, Easy Assay Method for Human Cysteine Sulfinic Acid Decarboxylase. · 2021 · https://pubmed.ncbi.nlm.nih.gov/34068845/ · DOI 10.3390/life11050438
Complete structured claim and evidencePurified human CSAD decarboxylated L-cysteine sulfinic acid to hypotaurine in PLP-containing enzyme assays.
Experimental context and source evidence
- evidence_access
- Primary full text, introduction and enzyme-assay results
- experimental_model
- Recombinant human enzyme; substrate kinetics and circular-dichroism assays.
- limitations
- Hypotaurine still needs oxidation to become taurine; this is not a human supplementation experiment.
- nutrient_topic
- Taurine collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Taurine
- plain_language
- Vitamin B6-dependent CSAD performs a step between cysteine and taurine.
- primary_references
- A Novel, Easy Assay Method for Human Cysteine Sulfinic Acid Decarboxylase. · 2021 · https://pubmed.ncbi.nlm.nih.gov/34068845/ · DOI 10.3390/life11050438
Taurine: synthesis, transport, mitochondrial decoding and nutrient interactions (2026-09-19) · lines 33–39
AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Recombinant human enzyme; substrate kinetics and circular-dichroism assays. · source_derived_draft · unverified_draft
## taurine-csad-cysteinesulfinate Vitamin B6-dependent CSAD performs a step between cysteine and taurine. Purified human CSAD decarboxylated L-cysteine sulfinic acid to hypotaurine in PLP-containing enzyme assays. Model: Recombinant human enzyme; substrate kinetics and circular-dichroism assays. Limitations: Hypotaurine still needs oxidation to become taurine; this is not a human supplementation experiment. Evidence access: Primary full text, introduction and enzyme-assay results A Novel, Easy Assay Method for Human Cysteine Sulfinic Acid Decarboxylase. · 2021 · https://pubmed.ncbi.nlm.nih.gov/34068845/ · DOI 10.3390/life11050438
Complete structured claim and evidence
What acts on it
The purified human CSAD characterized in this study was a PLP-dependent enzyme, linking its decarboxylation chemistry to the active cofactor form of vitamin B6.
Experimental context and source evidence
- evidence_access
- Primary full text, enzyme characterization
- experimental_model
- Human recombinant CSAD biochemical characterization.
- limitations
- Cofactor dependence does not establish that extra B6 increases taurine in a replete person.
- nutrient_topic
- Taurine collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Taurine
- plain_language
- CSAD needs the active B6 cofactor, not just its cysteine-derived substrate.
- primary_references
- A Novel, Easy Assay Method for Human Cysteine Sulfinic Acid Decarboxylase. · 2021 · https://pubmed.ncbi.nlm.nih.gov/34068845/ · DOI 10.3390/life11050438
Taurine: synthesis, transport, mitochondrial decoding and nutrient interactions (2026-09-19) · lines 41–47
AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Human recombinant CSAD biochemical characterization. · source_derived_draft · unverified_draft
## taurine-csad-plp CSAD needs the active B6 cofactor, not just its cysteine-derived substrate. The purified human CSAD characterized in this study was a PLP-dependent enzyme, linking its decarboxylation chemistry to the active cofactor form of vitamin B6. Model: Human recombinant CSAD biochemical characterization. Limitations: Cofactor dependence does not establish that extra B6 increases taurine in a replete person. Evidence access: Primary full text, enzyme characterization A Novel, Easy Assay Method for Human Cysteine Sulfinic Acid Decarboxylase. · 2021 · https://pubmed.ncbi.nlm.nih.gov/34068845/ · DOI 10.3390/life11050438
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.