Component

Transferrin-dependent endosomal iron delivery to cytosol

Transferrin-dependent endosomal iron delivery to cytosol. Species, exposure and limitations are retained in each linked claim.

2 recorded relationships. Experimental role, claim status and evidence remain attached to each record.

Read recorded mechanisms Open recursive mind map

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.

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.

Recorded relationships

What acts on it

  1. Steap3 colocalized with transferrin-cycle endosomes and promoted iron reduction and transferrin-dependent iron uptake.

    Mouse metalloreductase Steap3 → Transferrin-dependent endosomal iron delivery to cytosol source_derived_draftungraded
    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/iron-research/16227996.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "cd6e35b6ea534163d0db76cbdec2fa6c3c2dd998b0a1f66d9f16479bcb87711b", "start_char": 0, "end_char": 1006, "text_sha256": "cd6e35b6ea534163d0db76cbdec2fa6c3c2dd998b0a1f66d9f16479bcb87711b"}
    experimental_model
    Positional cloning, overexpression and deficient-mouse experiments
    exposure
    Steap3 deficiency and overexpression
    limitations
    A dominant erythroid reduction pathway, not proof of equal dependence in every tissue.
    nutrient_topic
    Iron research collection; topical membership is not evidence of a direct dietary effect. · Iron
    organism
    Mice and mouse Steap3 expression systems
    plain_language
    Iron released from transferrin needs another chemical reduction step before it can leave the endosome.
    primary_references
    [iron-p16227996] Identification of a ferrireductase required for efficient transferrin-dependent iron uptake in erythroid cells. (2005). https://pubmed.ncbi.nlm.nih.gov/16227996/ DOI: 10.1038/ng1658
    tissue_or_cell_type
    Erythroid endosomes

    Iron: absorption, trafficking, iron-dependent enzymes and nutrient interactions (2026-09-17) · lines 446–457

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Positional cloning, overexpression and deficient-mouse experiments · source_derived_draft · unverified_draft

    ### iron-steap-reduction Steap3 colocalized with transferrin-cycle endosomes and promoted iron reduction and transferrin-dependent iron uptake. Condition category: normal nutrient_topic: Iron research collection; topical membership is not evidence of a direct dietary effect. plain_language: Iron released from transferrin needs another chemical reduction step before it can leave the endosome. organism: Mice and mouse Steap3 expression systems tissue_or_cell_type: Erythroid endosomes experimental_model: Positional cloning, overexpression and deficient-mouse experiments limitations: A dominant erythroid reduction pathway, not proof of equal dependence in every tissue. exposure: Steap3 deficiency and overexpression evidence_span: {"source_cache": "artifacts/iron-research/16227996.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "cd6e35b6ea534163d0db76cbdec2fa6c3c2dd998b0a1f66d9f16479bcb87711b", "start_char": 0, "end_char": 1006, "text_sha256": "cd6e35b6ea534163d0db76cbdec2fa6c3c2dd998b0a1f66d9f16479bcb87711b"} [iron-p16227996] Identification of a ferrireductase required for efficient transferrin-dependent iron uptake in erythroid cells. (2005). https://pubmed.ncbi.nlm.nih.gov/16227996/ DOI: 10.1038/ng1658
    Complete structured claim and evidence

  2. The transferrin-cycle model supported by the binding experiments releases iron in acidified endosomes while apotransferrin remains receptor-bound.

    Human serum transferrin / TF → Transferrin-dependent endosomal iron delivery to cytosol source_derived_draftungraded
    Experimental context and source evidence
    evidence_span
    {"source_cache": "artifacts/iron-research/6300903.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "29d23cdaaacd30003c1f3e70935d7ab5ccbb1612379d6e650d356d1235438852", "start_char": 0, "end_char": 906, "text_sha256": "29d23cdaaacd30003c1f3e70935d7ab5ccbb1612379d6e650d356d1235438852"}
    experimental_model
    Receptor binding at controlled pH and transferrin cycle analysis
    exposure
    Apotransferrin and diferric transferrin binding at acidic versus neutral pH
    limitations
    The indexed abstract does not identify the cell line; its experiments support a pH-dependent trafficking model, not direct measures of whole-body iron turnover.
    nutrient_topic
    Iron research collection; topical membership is not evidence of a direct dietary effect. · Iron
    organism
    Cultured-cell transferrin receptor system
    plain_language
    The carrier gives up its iron inside an acidic compartment but stays attached to its return transport.
    primary_references
    [iron-p6300903] pH and the recycling of transferrin during receptor-mediated endocytosis. (1983). https://pubmed.ncbi.nlm.nih.gov/6300903/ DOI: 10.1073/pnas.80.8.2258
    tissue_or_cell_type
    Cell surface and endosomal recycling model

    Iron: absorption, trafficking, iron-dependent enzymes and nutrient interactions (2026-09-17) · lines 420–431

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Receptor binding at controlled pH and transferrin cycle analysis · source_derived_draft · unverified_draft

    ### iron-tf-acidic-release The transferrin-cycle model supported by the binding experiments releases iron in acidified endosomes while apotransferrin remains receptor-bound. Condition category: normal nutrient_topic: Iron research collection; topical membership is not evidence of a direct dietary effect. plain_language: The carrier gives up its iron inside an acidic compartment but stays attached to its return transport. organism: Cultured-cell transferrin receptor system tissue_or_cell_type: Cell surface and endosomal recycling model experimental_model: Receptor binding at controlled pH and transferrin cycle analysis limitations: The indexed abstract does not identify the cell line; its experiments support a pH-dependent trafficking model, not direct measures of whole-body iron turnover. exposure: Apotransferrin and diferric transferrin binding at acidic versus neutral pH evidence_span: {"source_cache": "artifacts/iron-research/6300903.abstract.txt", "locator": "Exact primary indexed abstract; zero-based, end-exclusive Unicode character offsets", "file_sha256": "29d23cdaaacd30003c1f3e70935d7ab5ccbb1612379d6e650d356d1235438852", "start_char": 0, "end_char": 906, "text_sha256": "29d23cdaaacd30003c1f3e70935d7ab5ccbb1612379d6e650d356d1235438852"} [iron-p6300903] pH and the recycling of transferrin during receptor-mediated endocytosis. (1983). https://pubmed.ncbi.nlm.nih.gov/6300903/ DOI: 10.1073/pnas.80.8.2258
    Complete structured claim and evidence

In the sources

Preserved passages that mention this component, quoted exactly. Open one to read it in context.

    This is a research prototype built from draft material. It is not medical advice, and its statements still await verification against the original studies.

    Evidence, AI assistance and curation standards