Component
Human HLCS beginning at residue 58
Human HLCS beginning at residue 58. 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
Full-length human HLCS associated with the minimal biotin acceptor about twice as fast as the residue-58 isoform in pre-steady-state transfer measurements.
Experimental context and source evidence
- evidence_span
- {"source_cache": "artifacts/biotin-research/19740736.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "27724d2b900152fade1d3be186d350c2b1862e5281355990f4720236798248ed", "start_char": 0, "end_char": 1259, "text_sha256": "27724d2b900152fade1d3be186d350c2b1862e5281355990f4720236798248ed"}
- experimental_model
- Purified full-length and residue-58 human HLCS isoforms expressed in E. coli
- exposure
- Biotin/ATP activation and single-turnover biotin transfer
- limitations
- Minimal-substrate kinetics do not prove a universal tissue allocation hierarchy; expression host is not the protein species.
- nutrient_topic
- Biotin research collection; topical membership is not evidence of a direct dietary effect. · Biotin
- organism
- Homo sapiens
- plain_language
- Two HLCS forms recognize an enzyme attachment site at different rates.
- primary_references
- [b7-p19740736] Distinct amino termini of two human HCS isoforms influence biotin acceptor substrate recognition. (2009). https://pubmed.ncbi.nlm.nih.gov/19740736/ DOI: 10.1074/jbc.m109.046201
- tissue_or_cell_type
- Purified proteins and minimal biotin-accepting substrate
Biotin: carboxylases, recycling, deficiency and nutrient interactions (2026-09-17) · lines 377–388
AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Purified full-length and residue-58 human HLCS isoforms expressed in E. coli · source_derived_draft · unverified_draft
### b7-hlcs-isoform-kinetics Full-length human HLCS associated with the minimal biotin acceptor about twice as fast as the residue-58 isoform in pre-steady-state transfer measurements. Condition category: normal nutrient_topic: Biotin research collection; topical membership is not evidence of a direct dietary effect. plain_language: Two HLCS forms recognize an enzyme attachment site at different rates. organism: Homo sapiens tissue_or_cell_type: Purified proteins and minimal biotin-accepting substrate experimental_model: Purified full-length and residue-58 human HLCS isoforms expressed in E. coli limitations: Minimal-substrate kinetics do not prove a universal tissue allocation hierarchy; expression host is not the protein species. exposure: Biotin/ATP activation and single-turnover biotin transfer evidence_span: {"source_cache": "artifacts/biotin-research/19740736.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "27724d2b900152fade1d3be186d350c2b1862e5281355990f4720236798248ed", "start_char": 0, "end_char": 1259, "text_sha256": "27724d2b900152fade1d3be186d350c2b1862e5281355990f4720236798248ed"} [b7-p19740736] Distinct amino termini of two human HCS isoforms influence biotin acceptor substrate recognition. (2009). https://pubmed.ncbi.nlm.nih.gov/19740736/ DOI: 10.1074/jbc.m109.046201
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.