Component

Mouse Golgi bisphosphate nucleotidase 2 / Bpnt2

Context-specific entity; species, compartment and exposure are stated on each claim.

3 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 it acts on

  1. Nervous-system Bpnt2 deletion lowered chondroitin-4-sulfation and increased chondroitin-6-sulfation in selected brain regions.

    Mouse Golgi bisphosphate nucleotidase 2 / Bpnt2 → Mouse cortical and hippocampal chondroitin sulfation source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    machinery_impairment Imported condition classification; unverified.
    evidence_access
    Primary abstract
    experimental_model
    Nestin-Cre conditional mouse knockout.
    limitations
    No significant gross perineuronal-net or tested behavioral abnormalities were detected; not a lithium treatment experiment.
    nutrient_topic
    Lithium collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Lithium
    plain_language
    This enzyme also changes the brain extracellular matrix.
    primary_references
    Bisphosphate nucleotidase 2 (BPNT2), a molecular target of lithium, regulates chondroitin sulfation patterns in the cerebral cortex and hippocampus. · 2022 · https://pubmed.ncbi.nlm.nih.gov/34920982/ · DOI 10.1016/j.jbior.2021.100858
    trigger_kind
    machinery_impairment Imported condition classification; unverified.

    Lithium: metal-sensitive enzymes, transport and cross-nutrient mechanisms (2026-09-19) · lines 168–174

    AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Nestin-Cre conditional mouse knockout. · source_derived_draft · unverified_draft

    ## lithium-bpnt2-brain-loss This enzyme also changes the brain extracellular matrix. Nervous-system Bpnt2 deletion lowered chondroitin-4-sulfation and increased chondroitin-6-sulfation in selected brain regions. Model: Nestin-Cre conditional mouse knockout. Limitations: No significant gross perineuronal-net or tested behavioral abnormalities were detected; not a lithium treatment experiment. Evidence access: Primary abstract Bisphosphate nucleotidase 2 (BPNT2), a molecular target of lithium, regulates chondroitin sulfation patterns in the cerebral cortex and hippocampus. · 2022 · https://pubmed.ncbi.nlm.nih.gov/34920982/ · DOI 10.1016/j.jbior.2021.100858
    Complete structured claim and evidence

  2. Wild-type Bpnt2 restored GAG sulfation in knockout fibroblasts; catalytic-dead D108A did not.

    Mouse Golgi bisphosphate nucleotidase 2 / Bpnt2 → Mouse fibroblast glycosaminoglycan sulfation source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    machinery_impairment Imported condition classification; unverified.
    evidence_access
    Primary full text
    experimental_model
    Mouse embryonic fibroblast pellets; complementation and sulfation assays.
    limitations
    Sulfation depends on compartment and substrate; not a universal human sulfur requirement.
    nutrient_topic
    Lithium collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Lithium
    plain_language
    The enzyme must work, not merely be present.
    primary_references
    Sulfation of glycosaminoglycans depends on the catalytic activity of lithium-inhibited phosphatase BPNT2 in vitro. · 2021 · https://pubmed.ncbi.nlm.nih.gov/34634304/ · DOI 10.1016/j.jbc.2021.101293
    trigger_kind
    machinery_impairment Imported condition classification; unverified.

    Lithium: metal-sensitive enzymes, transport and cross-nutrient mechanisms (2026-09-19) · lines 152–158

    AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Mouse embryonic fibroblast pellets; complementation and sulfation assays. · source_derived_draft · unverified_draft

    ## lithium-bpnt2-catalysis The enzyme must work, not merely be present. Wild-type Bpnt2 restored GAG sulfation in knockout fibroblasts; catalytic-dead D108A did not. Model: Mouse embryonic fibroblast pellets; complementation and sulfation assays. Limitations: Sulfation depends on compartment and substrate; not a universal human sulfur requirement. Evidence access: Primary full text Sulfation of glycosaminoglycans depends on the catalytic activity of lithium-inhibited phosphatase BPNT2 in vitro. · 2021 · https://pubmed.ncbi.nlm.nih.gov/34634304/ · DOI 10.1016/j.jbc.2021.101293
    Complete structured claim and evidence

Where it participates (unsigned role)

  1. LiCl reduced intracellular and secreted GAG sulfation in wild-type mouse fibroblasts, with no further reduction after Bpnt2 knockout.

    Lithium ion (Li+) → Mouse fibroblast glycosaminoglycan sulfation source_derived_draftungraded
    Experimental context and source evidence
    evidence_access
    Primary full text
    experimental_model
    Mouse embryonic fibroblasts; 10 mM LiCl versus matched NaCl.
    limitations
    High experimental exposure; knockout occlusion supports a pathway but does not prove clinical cartilage damage.
    nutrient_topic
    Lithium collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Lithium
    plain_language
    The lithium response depended on this Golgi enzyme.
    primary_references
    Sulfation of glycosaminoglycans depends on the catalytic activity of lithium-inhibited phosphatase BPNT2 in vitro. · 2021 · https://pubmed.ncbi.nlm.nih.gov/34634304/ · DOI 10.1016/j.jbc.2021.101293

    Lithium: metal-sensitive enzymes, transport and cross-nutrient mechanisms (2026-09-19) · lines 160–166

    AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Mouse embryonic fibroblasts; 10 mM LiCl versus matched NaCl. · source_derived_draft · unverified_draft

    ## lithium-bpnt2-lithium-gag The lithium response depended on this Golgi enzyme. LiCl reduced intracellular and secreted GAG sulfation in wild-type mouse fibroblasts, with no further reduction after Bpnt2 knockout. Model: Mouse embryonic fibroblasts; 10 mM LiCl versus matched NaCl. Limitations: High experimental exposure; knockout occlusion supports a pathway but does not prove clinical cartilage damage. Evidence access: Primary full text Sulfation of glycosaminoglycans depends on the catalytic activity of lithium-inhibited phosphatase BPNT2 in vitro. · 2021 · https://pubmed.ncbi.nlm.nih.gov/34634304/ · DOI 10.1016/j.jbc.2021.101293
    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