Component

Human carnosine synthase / CARNS1 (ATPGD1)

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.

Read recorded mechanisms Open recursive mind map

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.

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.

Recorded relationships

What it acts on

  1. Stable carnosine-synthase expression in human SH-SY5Y cells was associated with 2-oxo-carnosine formation and less peroxide cytotoxicity.

    Human carnosine synthase / CARNS1 (ATPGD1) → Human SH-SY5Y cell survival under hydrogen peroxide source_derived_draftungraded
    Experimental context and source evidence
    evidence_access
    Primary abstract
    experimental_model
    Human neuroblastoma expression model.
    limitations
    Does not isolate 2-oxo-carnosine as the only protective mediator.
    nutrient_topic
    Carnosine collection; isomer, preparation, species, exposure and manipulation remain explicit. · L-Carnosine / beta-alanyl-L-histidine
    plain_language
    Increasing synthesis changed the cellular response to an oxidant.
    primary_references
    2-Oxo-histidine-containing dipeptides are functional oxidation products. · 2019 · https://pubmed.ncbi.nlm.nih.gov/30504220/ · DOI 10.1074/jbc.RA118.006111

    Carnosine: synthesis, transport, carbonyl chemistry and nutrient interactions (2026-09-19) · lines 348–354

    AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Human neuroblastoma expression model. · source_derived_draft · unverified_draft

    ## carnosine-carns1-cell-protection Increasing synthesis changed the cellular response to an oxidant. Stable carnosine-synthase expression in human SH-SY5Y cells was associated with 2-oxo-carnosine formation and less peroxide cytotoxicity. Model: Human neuroblastoma expression model. Limitations: Does not isolate 2-oxo-carnosine as the only protective mediator. Evidence access: Primary abstract 2-Oxo-histidine-containing dipeptides are functional oxidation products. · 2019 · https://pubmed.ncbi.nlm.nih.gov/30504220/ · DOI 10.1074/jbc.RA118.006111
    Complete structured claim and evidence

  2. Purified human CARNS1 also synthesized homocarnosine using GABA, with lower catalytic efficiency than the beta-alanine reaction.

    Human carnosine synthase / CARNS1 (ATPGD1) → Homocarnosine / GABA-L-histidine source_derived_draftungraded
    Experimental context and source evidence
    evidence_access
    Primary abstract
    experimental_model
    Recombinant human enzyme substrate comparison.
    limitations
    Shared synthesis does not mean the two peptides have identical functions.
    nutrient_topic
    Carnosine collection; isomer, preparation, species, exposure and manipulation remain explicit. · L-Carnosine / beta-alanyl-L-histidine
    plain_language
    The same enzyme can assemble a related GABA-containing peptide.
    primary_references
    Molecular identification of carnosine synthase as ATP-grasp domain-containing protein 1 (ATPGD1). · 2010 · https://pubmed.ncbi.nlm.nih.gov/20097752/ · DOI 10.1074/jbc.M109.095505

    Carnosine: synthesis, transport, carbonyl chemistry and nutrient interactions (2026-09-19) · lines 36–42

    AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Recombinant human enzyme substrate comparison. · source_derived_draft · unverified_draft

    ## carnosine-homocarnosine The same enzyme can assemble a related GABA-containing peptide. Purified human CARNS1 also synthesized homocarnosine using GABA, with lower catalytic efficiency than the beta-alanine reaction. Model: Recombinant human enzyme substrate comparison. Limitations: Shared synthesis does not mean the two peptides have identical functions. Evidence access: Primary abstract Molecular identification of carnosine synthase as ATP-grasp domain-containing protein 1 (ATPGD1). · 2010 · https://pubmed.ncbi.nlm.nih.gov/20097752/ · DOI 10.1074/jbc.M109.095505
    Complete structured claim and evidence

  3. Purified recombinant human CARNS1 joined beta-alanine and L-histidine to form carnosine in an ATP-containing assay.

    Human carnosine synthase / CARNS1 (ATPGD1) → L-Carnosine / beta-alanyl-L-histidine source_derived_draftungraded
    Experimental context and source evidence
    evidence_access
    Primary abstract and full-text enzyme methods
    experimental_model
    Human enzyme expressed in HEK293T cells.
    limitations
    An enzyme assay does not define dietary requirements.
    nutrient_topic
    Carnosine collection; isomer, preparation, species, exposure and manipulation remain explicit. · L-Carnosine / beta-alanyl-L-histidine
    plain_language
    Two building blocks are assembled by a specific enzyme.
    primary_references
    Molecular identification of carnosine synthase as ATP-grasp domain-containing protein 1 (ATPGD1). · 2010 · https://pubmed.ncbi.nlm.nih.gov/20097752/ · DOI 10.1074/jbc.M109.095505

    Carnosine: synthesis, transport, carbonyl chemistry and nutrient interactions (2026-09-19) · lines 20–26

    AI-assisted research curation; primary-abstract references and experimental limitations individually identified. Not publisher full text. · supports · Human enzyme expressed in HEK293T cells. · source_derived_draft · unverified_draft

    ## carnosine-synthesis Two building blocks are assembled by a specific enzyme. Purified recombinant human CARNS1 joined beta-alanine and L-histidine to form carnosine in an ATP-containing assay. Model: Human enzyme expressed in HEK293T cells. Limitations: An enzyme assay does not define dietary requirements. Evidence access: Primary abstract and full-text enzyme methods Molecular identification of carnosine synthase as ATP-grasp domain-containing protein 1 (ATPGD1). · 2010 · https://pubmed.ncbi.nlm.nih.gov/20097752/ · DOI 10.1074/jbc.M109.095505
    Complete structured claim and evidence

In the sources

Preserved passages that mention this component, quoted exactly. Open one to read it in context.

    This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.

    Evidence, AI assistance and curation standards