Component
Human checkpoint kinase 2 / CHEK2
Human checkpoint kinase 2 / CHEK2. 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.
What acts on it
Chromate exposure induced CHK2 phosphorylation as part of the ATM response in standard ascorbate-poor human cell cultures.
Experimental context and source evidence
- availability_state
- nutrient_deficiency Imported condition classification; unverified.
- evidence_span
- {"source_cache": "artifacts/chromium-research/25977998.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "26c325e343b04aa77acf3164d848e8127c2d6a329ff0d9968426a12bde81d0b3", "start_char": 0, "end_char": 2163, "text_sha256": "26c325e343b04aa77acf3164d848e8127c2d6a329ff0d9968426a12bde81d0b3"}
- experimental_model
- Ascorbate restoration and ATM perturbation in human lung-cell cultures
- exposure
- Chromate exposure in standard ascorbate-poor versus ascorbate-restored cells; ATM inhibition/silencing
- limitations
- Cr(VI) toxicology, not an experiment with dietary Cr(III). Loss of ATM activation does not mean loss of all genotoxicity or that vitamin C universally detoxifies chromium.
- nutrient_topic
- Chromium research collection; topical membership is not evidence of a direct dietary effect. · Chromium
- organism
- Human H460 cells and normal lung fibroblasts
- plain_language
- This downstream damage-response protein changed in the low-ascorbate culture condition.
- primary_references
- [chromium-p25977998] Different ATM Signaling in Response to Chromium(VI) Metabolism via Ascorbate and Nonascorbate Reduction: Implications for in Vitro Models and Toxicogenomics. (2016). https://pubmed.ncbi.nlm.nih.gov/25977998/ DOI: 10.1289/ehp.1409434
- tissue_or_cell_type
- DNA-damage signaling
- trigger_kind
- nutrient_deficiency Imported condition classification; unverified.
Chromium: transport, insulin signaling, nutrient interactions and essentiality debate (2026-09-17) · lines 1134–1145
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Ascorbate restoration and ATM perturbation in human lung-cell cultures · source_derived_draft · unverified_draft
### chromium-chromate-chk2 Chromate exposure induced CHK2 phosphorylation as part of the ATM response in standard ascorbate-poor human cell cultures. Condition category: nutrient_deficiency nutrient_topic: Chromium research collection; topical membership is not evidence of a direct dietary effect. plain_language: This downstream damage-response protein changed in the low-ascorbate culture condition. organism: Human H460 cells and normal lung fibroblasts tissue_or_cell_type: DNA-damage signaling experimental_model: Ascorbate restoration and ATM perturbation in human lung-cell cultures limitations: Cr(VI) toxicology, not an experiment with dietary Cr(III). Loss of ATM activation does not mean loss of all genotoxicity or that vitamin C universally detoxifies chromium. exposure: Chromate exposure in standard ascorbate-poor versus ascorbate-restored cells; ATM inhibition/silencing evidence_span: {"source_cache": "artifacts/chromium-research/25977998.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "26c325e343b04aa77acf3164d848e8127c2d6a329ff0d9968426a12bde81d0b3", "start_char": 0, "end_char": 2163, "text_sha256": "26c325e343b04aa77acf3164d848e8127c2d6a329ff0d9968426a12bde81d0b3"} [chromium-p25977998] Different ATM Signaling in Response to Chromium(VI) Metabolism via Ascorbate and Nonascorbate Reduction: Implications for in Vitro Models and Toxicogenomics. (2016). https://pubmed.ncbi.nlm.nih.gov/25977998/ DOI: 10.1289/ehp.1409434
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.