Component
Isoleucine-to-valine protein substitution in human fibroblasts
Context-specific entity; species, compartment and exposure are stated on each 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
Under isoleucine restriction, healthy human fibroblasts incorporated valine at isoleucine codons; biochemical assays implicated IARS1-mediated valine misacylation.
Experimental context and source evidence
- availability_state
- nutrient_deficiency Imported condition classification; unverified.
- evidence_access
- Primary full text
- experimental_model
- Primary human fibroblasts, mass spectrometry and tRNA charging assays.
- limitations
- Amino-acid substitution is not proof of normal function for every affected protein or nutritional interchangeability.
- nutrient_topic
- L-Isoleucine collection; species, compartment, exposure, co-substrates and manipulation remain explicit. · L-Isoleucine
- plain_language
- Some cells preserve translation by sacrificing amino-acid accuracy.
- primary_references
- Isoleucine-to-valine substitutions support cellular physiology during isoleucine deprivation. · 2025 · https://pubmed.ncbi.nlm.nih.gov/39657787/ · DOI 10.1093/nar/gkae1184
- trigger_kind
- nutrient_deficiency Imported condition classification; unverified.
L-Isoleucine: transport, translation, catabolism and cross-nutrient mechanisms (2026-09-19) · lines 114–120
AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Primary human fibroblasts, mass spectrometry and tRNA charging assays. · source_derived_draft · unverified_draft
## isoleucine-valine-substitution Some cells preserve translation by sacrificing amino-acid accuracy. Under isoleucine restriction, healthy human fibroblasts incorporated valine at isoleucine codons; biochemical assays implicated IARS1-mediated valine misacylation. Model: Primary human fibroblasts, mass spectrometry and tRNA charging assays. Limitations: Amino-acid substitution is not proof of normal function for every affected protein or nutritional interchangeability. Evidence access: Primary full text Isoleucine-to-valine substitutions support cellular physiology during isoleucine deprivation. · 2025 · https://pubmed.ncbi.nlm.nih.gov/39657787/ · DOI 10.1093/nar/gkae1184
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.