Component

Bone extracellular matrix

Biological or experimental compartment identified in the linked study.

5 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. Mature zebrafish fin-ray bone contains crystalline carbonated apatite platelets embedded in an organized collagen matrix.

    Hydroxyapatite / biological substituted apatite → Bone extracellular matrix source_derived_draftungraded
    Experimental context and source evidence
    compartment_description
    Bone extracellular matrix
    experimental_model
    Microscopy, diffraction and elemental analysis
    limitations
    Biological apatite is substituted and nonstoichiometric; the ideal hydroxyapatite formula is not an exact tissue composition.
    nutrient_topic
    Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
    organism
    Danio rerio
    plain_language
    Bone contains calcium in a solid mineral phase, distinct from dissolved calcium ions.
    primary_references
    [mahamid2008] Amorphous calcium phosphate is a major component of the forming fin bones of zebrafish: Indications for an amorphous precursor phase (2008). https://pmc.ncbi.nlm.nih.gov/articles/PMC2529085/ DOI: 10.1073/pnas.0803354105
    tissue_or_cell_type
    Fin-ray bone

    Calcium: mechanism-first literature curation (2026-09-17) · lines 862–872

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Microscopy, diffraction and elemental analysis · source_derived_draft · unverified_draft

    ### bone-calcium-in-solid-apatite Mature zebrafish fin-ray bone contains crystalline carbonated apatite platelets embedded in an organized collagen matrix. Condition category: normal nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: Bone contains calcium in a solid mineral phase, distinct from dissolved calcium ions. organism: Danio rerio tissue_or_cell_type: Fin-ray bone experimental_model: Microscopy, diffraction and elemental analysis limitations: Biological apatite is substituted and nonstoichiometric; the ideal hydroxyapatite formula is not an exact tissue composition. compartment_description: Bone extracellular matrix [mahamid2008] Amorphous calcium phosphate is a major component of the forming fin bones of zebrafish: Indications for an amorphous precursor phase (2008). https://pmc.ncbi.nlm.nih.gov/articles/PMC2529085/ DOI: 10.1073/pnas.0803354105
    Complete structured claim and evidence

Where it participates (unsigned role)

  1. ALPL/TNAP hydrolyzes extracellular pyrophosphate to inorganic phosphate, reducing an inhibitor of matrix mineralization.

    Inorganic pyrophosphate → Inorganic phosphate (Pi; protonation depends on pH) source_derived_draftungraded
    Experimental context and source evidence
    compartment_description
    Extracellular matrix and vesicle surface
    experimental_model
    Genetic and ex vivo pyrophosphate/mineralization experiments
    limitations
    Pi and PPi labels pool protonation states; this is not evidence that calcium activates TNAP.
    nutrient_topic
    Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
    organism
    Mus musculus
    plain_language
    TNAP removes a local brake on calcium phosphate crystal growth.
    primary_references
    [hessle2002] Tissue-nonspecific alkaline phosphatase and plasma cell membrane glycoprotein-1 are central antagonistic regulators of bone mineralization (2002). https://pmc.ncbi.nlm.nih.gov/articles/PMC123160/ DOI: 10.1073/pnas.142063399
    tissue_or_cell_type
    Osteoblast matrix and matrix vesicles

    Calcium: mechanism-first literature curation (2026-09-17) · lines 931–941

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Genetic and ex vivo pyrophosphate/mineralization experiments · source_derived_draft · unverified_draft

    ### alpl-pyrophosphate-hydrolysis ALPL/TNAP hydrolyzes extracellular pyrophosphate to inorganic phosphate, reducing an inhibitor of matrix mineralization. Condition category: normal nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: TNAP removes a local brake on calcium phosphate crystal growth. organism: Mus musculus tissue_or_cell_type: Osteoblast matrix and matrix vesicles experimental_model: Genetic and ex vivo pyrophosphate/mineralization experiments limitations: Pi and PPi labels pool protonation states; this is not evidence that calcium activates TNAP. compartment_description: Extracellular matrix and vesicle surface [hessle2002] Tissue-nonspecific alkaline phosphatase and plasma cell membrane glycoprotein-1 are central antagonistic regulators of bone mineralization (2002). https://pmc.ncbi.nlm.nih.gov/articles/PMC123160/ DOI: 10.1073/pnas.142063399
    Complete structured claim and evidence

  2. ANKH-expressing HEK293 cells released citrate; Ank-mutant mice also had depleted bone-matrix citrate.

    Progressive ankylosis protein homolog ANKH → Citrate source_derived_draftungraded
    Experimental context and source evidence
    compartment_description
    Cytosol to extracellular space
    experimental_model
    Metabolomics and Ank-mutant tissue measurements
    limitations
    Citrate is a separate substrate; these findings do not prove that citrate alone explains altered bone strength.
    nutrient_topic
    Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
    organism
    Homo sapiens cells; Mus musculus
    plain_language
    ANKH affects a mineral-associated organic component as well as PPi supply.
    primary_references
    [szeri2020] The membrane protein ANKH is crucial for bone mechanical performance by mediating cellular export of citrate and ATP (2020). https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1008884 DOI: 10.1371/journal.pgen.1008884
    tissue_or_cell_type
    Cell medium and bone matrix

    Calcium: mechanism-first literature curation (2026-09-17) · lines 1024–1034

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Metabolomics and Ank-mutant tissue measurements · source_derived_draft · unverified_draft

    ### ankh-citrate-export ANKH-expressing HEK293 cells released citrate; Ank-mutant mice also had depleted bone-matrix citrate. Condition category: normal nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: ANKH affects a mineral-associated organic component as well as PPi supply. organism: Homo sapiens cells; Mus musculus tissue_or_cell_type: Cell medium and bone matrix experimental_model: Metabolomics and Ank-mutant tissue measurements limitations: Citrate is a separate substrate; these findings do not prove that citrate alone explains altered bone strength. compartment_description: Cytosol to extracellular space [szeri2020] The membrane protein ANKH is crucial for bone mechanical performance by mediating cellular export of citrate and ATP (2020). https://journals.plos.org/plosgenetics/article?id=10.1371/journal.pgen.1008884 DOI: 10.1371/journal.pgen.1008884
    Complete structured claim and evidence

  3. Amorphous calcium phosphate in newly forming zebrafish fin bone and increasing crystallinity with maturation support an amorphous-precursor model.

    Amorphous calcium phosphate → Hydroxyapatite / biological substituted apatite source_derived_draftungraded
    Experimental context and source evidence
    compartment_description
    Bone extracellular matrix
    experimental_model
    Spatial maturation series and extracted-particle crystallization
    limitations
    The proposed sequence is not direct tracking of every mineral particle in living human bone.
    nutrient_topic
    Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
    organism
    Danio rerio
    plain_language
    A disordered calcium phosphate phase may precede organized bone crystals.
    primary_references
    [mahamid2008] Amorphous calcium phosphate is a major component of the forming fin bones of zebrafish: Indications for an amorphous precursor phase (2008). https://pmc.ncbi.nlm.nih.gov/articles/PMC2529085/ DOI: 10.1073/pnas.0803354105
    tissue_or_cell_type
    Growing fin-ray bone

    Calcium: mechanism-first literature curation (2026-09-17) · lines 874–884

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Spatial maturation series and extracted-particle crystallization · source_derived_draft · unverified_draft

    ### bone-amorphous-mineral-precursor-hypothesis Amorphous calcium phosphate in newly forming zebrafish fin bone and increasing crystallinity with maturation support an amorphous-precursor model. Condition category: normal nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: A disordered calcium phosphate phase may precede organized bone crystals. organism: Danio rerio tissue_or_cell_type: Growing fin-ray bone experimental_model: Spatial maturation series and extracted-particle crystallization limitations: The proposed sequence is not direct tracking of every mineral particle in living human bone. compartment_description: Bone extracellular matrix [mahamid2008] Amorphous calcium phosphate is a major component of the forming fin bones of zebrafish: Indications for an amorphous precursor phase (2008). https://pmc.ncbi.nlm.nih.gov/articles/PMC2529085/ DOI: 10.1073/pnas.0803354105
    Complete structured claim and evidence

  4. Resorbing osteoclasts acidified the extracellular compartment beneath their ruffled border and reacidified it after ammonium chloride washout.

    Osteoclast → Acidification of the osteoclast resorption lacuna source_derived_draftungraded
    Experimental context and source evidence
    compartment_description
    Sealed extracellular resorption lacuna
    experimental_model
    Acridine-orange localization and reversible pH perturbation
    limitations
    This study localizes acidification; it does not identify a particular modern proton-pump subunit or measure whole-body calcium flux.
    nutrient_topic
    Calcium research collection; topical membership is not evidence of a direct dietary effect. · Calcium
    organism
    Gallus gallus
    plain_language
    Bone-resorbing cells create a locally acidic space against bone.
    primary_references
    [baron1985] Cell-mediated extracellular acidification and bone resorption: evidence for a low pH in resorbing lacunae and localization of a 100-kD lysosomal membrane protein at the osteoclast ruffled border (1985). https://rupress.org/jcb/article/101/6/2210/21648/Cell-mediated-extracellular-acidification-and-bone DOI: 10.1083/jcb.101.6.2210
    tissue_or_cell_type
    Osteoclast-bone interface

    Calcium: mechanism-first literature curation (2026-09-17) · lines 1081–1091

    AI-assisted literature curation; primary study URLs and scope retained in the document and extraction. Not publisher full text. · supports · Acridine-orange localization and reversible pH perturbation · source_derived_draft · unverified_draft

    ### osteoclast-lacuna-acidification Resorbing osteoclasts acidified the extracellular compartment beneath their ruffled border and reacidified it after ammonium chloride washout. Condition category: normal nutrient_topic: Calcium research collection; topical membership is not evidence of a direct dietary effect. plain_language: Bone-resorbing cells create a locally acidic space against bone. organism: Gallus gallus tissue_or_cell_type: Osteoclast-bone interface experimental_model: Acridine-orange localization and reversible pH perturbation limitations: This study localizes acidification; it does not identify a particular modern proton-pump subunit or measure whole-body calcium flux. compartment_description: Sealed extracellular resorption lacuna [baron1985] Cell-mediated extracellular acidification and bone resorption: evidence for a low pH in resorbing lacunae and localization of a 100-kD lysosomal membrane protein at the osteoclast ruffled border (1985). https://rupress.org/jcb/article/101/6/2210/21648/Cell-mediated-extracellular-acidification-and-bone DOI: 10.1083/jcb.101.6.2210
    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