Component
GTP-bound rod transducin alpha
Activated GNAT1 nucleotide state; distinct from the transducin heterotrimer.
2 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
Activated transducin stimulated rod cyclic-GMP phosphodiesterase in the reconstituted signaling system.
Experimental context and source evidence
- experimental_model
- Reconstituted transducin/PDE assays
- limitations
- Rod PDE6 complex identity is kept separate from cone PDE6.
- nutrient_topic
- Vitamin A research collection; topical membership is not evidence of a direct dietary effect. · Vitamin A
- organism
- Bos taurus
- plain_language
- Transducin turns on the enzyme that removes cGMP.
- primary_references
- [fung-1981] Flow of information in the light-triggered cyclic nucleotide cascade of vision (1981). https://pubmed.ncbi.nlm.nih.gov/6264430/ DOI: 10.1073/pnas.78.1.152
- tissue_or_cell_type
- Rod outer-segment proteins
Vitamin A: forms, mechanisms, deficiency and excess (2026-09-17) · lines 916–925
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Reconstituted transducin/PDE assays · source_derived_draft · unverified_draft
### a-vision-transducin-pde6 Activated transducin stimulated rod cyclic-GMP phosphodiesterase in the reconstituted signaling system. Condition category: normal nutrient_topic: Vitamin A research collection; topical membership is not evidence of a direct dietary effect. plain_language: Transducin turns on the enzyme that removes cGMP. organism: Bos taurus tissue_or_cell_type: Rod outer-segment proteins experimental_model: Reconstituted transducin/PDE assays limitations: Rod PDE6 complex identity is kept separate from cone PDE6. [fung-1981] Flow of information in the light-triggered cyclic nucleotide cascade of vision (1981). https://pubmed.ncbi.nlm.nih.gov/6264430/ DOI: 10.1073/pnas.78.1.152
Complete structured claim and evidence
Where it participates (unsigned role)
Photoactivated rhodopsin catalyzed GDP-to-GTP nucleotide exchange on transducin in reconstituted bovine rod preparations.
Experimental context and source evidence
- experimental_model
- Purified protein reconstitution
- limitations
- Biochemical amplification is not a nutritional dose response.
- nutrient_topic
- Vitamin A research collection; topical membership is not evidence of a direct dietary effect. · Vitamin A
- organism
- Bos taurus
- plain_language
- Activated pigment switches transducin into its signaling state.
- primary_references
- [fung-1981] Flow of information in the light-triggered cyclic nucleotide cascade of vision (1981). https://pubmed.ncbi.nlm.nih.gov/6264430/ DOI: 10.1073/pnas.78.1.152
- tissue_or_cell_type
- Rod outer-segment protein system
Vitamin A: forms, mechanisms, deficiency and excess (2026-09-17) · lines 905–914
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Purified protein reconstitution · source_derived_draft · unverified_draft
### a-vision-transducin-exchange Photoactivated rhodopsin catalyzed GDP-to-GTP nucleotide exchange on transducin in reconstituted bovine rod preparations. Condition category: normal nutrient_topic: Vitamin A research collection; topical membership is not evidence of a direct dietary effect. plain_language: Activated pigment switches transducin into its signaling state. organism: Bos taurus tissue_or_cell_type: Rod outer-segment protein system experimental_model: Purified protein reconstitution limitations: Biochemical amplification is not a nutritional dose response. [fung-1981] Flow of information in the light-triggered cyclic nucleotide cascade of vision (1981). https://pubmed.ncbi.nlm.nih.gov/6264430/ DOI: 10.1073/pnas.78.1.152
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.