Component
UDP
Independent small molecule record; interpretation is limited by each linked claim and its study context.
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.
Where it participates (unsigned role)
COLGALT1 transfers galactose from UDP-galactose to collagen hydroxylysine.
Experimental context and source evidence
- experimental_model
- Recombinant human COLGALT1 with collagen peptides.
- limitations
- This reaction modifies lysine already in a protein. It does not show that extra oral lysine increases the reaction or improves a clinical outcome.
- organism
- Human
- plain_language
- A sugar is attached to a lysine residue that has already been hydroxylated.
- primary_references
- [colgalt1-2025] Molecular structure and enzymatic mechanism of the human collagen hydroxylysine galactosyltransferase GLT25D1/COLGALT1 (2025). https://www.nature.com/articles/s41467-025-59017-5 DOI: 10.1038/s41467-025-59017-5
- tissue_or_cell_type
- Not specified as a whole tissue; see experimental model.
L-Lysine: mechanism-first literature curation (2026-09-17) · lines 437–445
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Recombinant human COLGALT1 with collagen peptides. · source_derived_draft · unverified_draft
### colgalt1-galactosylation COLGALT1 transfers galactose from UDP-galactose to collagen hydroxylysine. Plain language: A sugar is attached to a lysine residue that has already been hydroxylated. Condition category: normal organism: Human tissue_or_cell_type: Not specified as a whole tissue; see experimental model. experimental_model: Recombinant human COLGALT1 with collagen peptides. limitations: This reaction modifies lysine already in a protein. It does not show that extra oral lysine increases the reaction or improves a clinical outcome. [colgalt1-2025] Molecular structure and enzymatic mechanism of the human collagen hydroxylysine galactosyltransferase GLT25D1/COLGALT1 (2025). https://www.nature.com/articles/s41467-025-59017-5 DOI: 10.1038/s41467-025-59017-5
Complete structured claim and evidencePLOD3 transfers glucose from UDP-glucose onto galactosyl-hydroxylysine in collagen.
Experimental context and source evidence
- experimental_model
- Human PLOD3-COLGALT1 complex structure and biochemical assays.
- limitations
- This reaction modifies lysine already in a protein. It does not show that extra oral lysine increases the reaction or improves a clinical outcome.
- organism
- Human
- plain_language
- A second sugar can be added after galactose.
- primary_references
- [kog-glycosylation-2025] The structural basis for the human procollagen lysine hydroxylation and dual-glycosylation (2025). https://www.nature.com/articles/s41467-025-57768-9 DOI: 10.1038/s41467-025-57768-9
- tissue_or_cell_type
- Not specified as a whole tissue; see experimental model.
L-Lysine: mechanism-first literature curation (2026-09-17) · lines 457–465
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Human PLOD3-COLGALT1 complex structure and biochemical assays. · source_derived_draft · unverified_draft
### plod3-glucosylation PLOD3 transfers glucose from UDP-glucose onto galactosyl-hydroxylysine in collagen. Plain language: A second sugar can be added after galactose. Condition category: normal organism: Human tissue_or_cell_type: Not specified as a whole tissue; see experimental model. experimental_model: Human PLOD3-COLGALT1 complex structure and biochemical assays. limitations: This reaction modifies lysine already in a protein. It does not show that extra oral lysine increases the reaction or improves a clinical outcome. [kog-glycosylation-2025] The structural basis for the human procollagen lysine hydroxylation and dual-glycosylation (2025). https://www.nature.com/articles/s41467-025-57768-9 DOI: 10.1038/s41467-025-57768-9
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.