Component

3-prime-Phosphoadenosine-5-prime-phosphate / PAP

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

7 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. Bpnt1 knockout raised mouse liver PAP up to about 50-fold.

    Mouse bisphosphate nucleotidase 1 / Bpnt1 → 3-prime-Phosphoadenosine-5-prime-phosphate / PAP source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    machinery_impairment Imported condition classification; unverified.
    evidence_access
    Primary abstract
    experimental_model
    Constitutive Bpnt1 knockout mice.
    limitations
    Genetic absence is not equivalent to dietary lithium exposure or partial drug inhibition.
    nutrient_topic
    Lithium collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Lithium
    plain_language
    Loss of clearance lets the by-product build up.
    primary_references
    Role for cytoplasmic nucleotide hydrolysis in hepatic function and protein synthesis. · 2013 · https://pubmed.ncbi.nlm.nih.gov/23479625/ · DOI 10.1073/pnas.1205001110
    trigger_kind
    machinery_impairment Imported condition classification; unverified.

    Lithium: metal-sensitive enzymes, transport and cross-nutrient mechanisms (2026-09-19) · lines 128–134

    AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Constitutive Bpnt1 knockout mice. · source_derived_draft · unverified_draft

    ## lithium-bpnt1-loss-pap Loss of clearance lets the by-product build up. Bpnt1 knockout raised mouse liver PAP up to about 50-fold. Model: Constitutive Bpnt1 knockout mice. Limitations: Genetic absence is not equivalent to dietary lithium exposure or partial drug inhibition. Evidence access: Primary abstract Role for cytoplasmic nucleotide hydrolysis in hepatic function and protein synthesis. · 2013 · https://pubmed.ncbi.nlm.nih.gov/23479625/ · DOI 10.1073/pnas.1205001110
    Complete structured claim and evidence

  2. Cloned rat RnPIP hydrolyzed PAP and Ins(1,4)P2 in magnesium-dependent reactions.

    Rat bisphosphate nucleotidase 1 / RnPIP → 3-prime-Phosphoadenosine-5-prime-phosphate / PAP source_derived_draftungraded
    Experimental context and source evidence
    evidence_access
    Primary abstract
    experimental_model
    Cloned rat enzyme; biochemical substrate assays.
    limitations
    The paper proposes consequences for sulfotransferases/RNA processing; those downstream effects were not all tested.
    nutrient_topic
    Lithium collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Lithium
    plain_language
    Clearing a sulfur-pathway by-product uses another metal-dependent enzyme.
    primary_references
    A novel mammalian lithium-sensitive enzyme with a dual enzymatic activity, 3'-phosphoadenosine 5'-phosphate phosphatase and inositol-polyphosphate 1-phosphatase. · 1999 · https://pubmed.ncbi.nlm.nih.gov/10347153/ · DOI 10.1074/jbc.274.23.16034

    Lithium: metal-sensitive enzymes, transport and cross-nutrient mechanisms (2026-09-19) · lines 112–118

    AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Cloned rat enzyme; biochemical substrate assays. · source_derived_draft · unverified_draft

    ## lithium-bpnt1-substrate Clearing a sulfur-pathway by-product uses another metal-dependent enzyme. Cloned rat RnPIP hydrolyzed PAP and Ins(1,4)P2 in magnesium-dependent reactions. Model: Cloned rat enzyme; biochemical substrate assays. Limitations: The paper proposes consequences for sulfotransferases/RNA processing; those downstream effects were not all tested. Evidence access: Primary abstract A novel mammalian lithium-sensitive enzyme with a dual enzymatic activity, 3'-phosphoadenosine 5'-phosphate phosphatase and inositol-polyphosphate 1-phosphatase. · 1999 · https://pubmed.ncbi.nlm.nih.gov/10347153/ · DOI 10.1074/jbc.274.23.16034
    Complete structured claim and evidence

Where it participates (unsigned role)

  1. Submillimolar lithium chloride inhibited rat RnPIP hydrolysis of both PAP and Ins(1,4)P2.

    Lithium ion (Li+) → Rat bisphosphate nucleotidase 1 / RnPIP source_derived_draftungraded
    Experimental context and source evidence
    evidence_access
    Primary abstract
    experimental_model
    Rat recombinant enzyme; calcium also inhibited activity.
    limitations
    Not a quantitative human exposure-to-organ-injury model.
    nutrient_topic
    Lithium collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Lithium
    plain_language
    One lithium-sensitive enzyme connects two metabolic branches.
    primary_references
    A novel mammalian lithium-sensitive enzyme with a dual enzymatic activity, 3'-phosphoadenosine 5'-phosphate phosphatase and inositol-polyphosphate 1-phosphatase. · 1999 · https://pubmed.ncbi.nlm.nih.gov/10347153/ · DOI 10.1074/jbc.274.23.16034

    Lithium: metal-sensitive enzymes, transport and cross-nutrient mechanisms (2026-09-19) · lines 120–126

    AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Rat recombinant enzyme; calcium also inhibited activity. · source_derived_draft · unverified_draft

    ## lithium-bpnt1-lithium One lithium-sensitive enzyme connects two metabolic branches. Submillimolar lithium chloride inhibited rat RnPIP hydrolysis of both PAP and Ins(1,4)P2. Model: Rat recombinant enzyme; calcium also inhibited activity. Limitations: Not a quantitative human exposure-to-organ-injury model. Evidence access: Primary abstract A novel mammalian lithium-sensitive enzyme with a dual enzymatic activity, 3'-phosphoadenosine 5'-phosphate phosphatase and inositol-polyphosphate 1-phosphatase. · 1999 · https://pubmed.ncbi.nlm.nih.gov/10347153/ · DOI 10.1074/jbc.274.23.16034
    Complete structured claim and evidence

  2. Bpnt1-deficient mice showed repressed translation, abnormal nucleoli and liver injury.

    Mouse bisphosphate nucleotidase 1 / Bpnt1 → Mouse hepatic protein synthesis source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    machinery_impairment Imported condition classification; unverified.
    evidence_access
    Primary abstract
    experimental_model
    Mouse knockout; tissue-dependent phenotype.
    limitations
    Not evidence that routine lithium treatment causes this knockout syndrome.
    nutrient_topic
    Lithium collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Lithium
    plain_language
    The accumulated by-product accompanied a failure of protein production.
    primary_references
    Role for cytoplasmic nucleotide hydrolysis in hepatic function and protein synthesis. · 2013 · https://pubmed.ncbi.nlm.nih.gov/23479625/ · DOI 10.1073/pnas.1205001110
    trigger_kind
    machinery_impairment Imported condition classification; unverified.

    Lithium: metal-sensitive enzymes, transport and cross-nutrient mechanisms (2026-09-19) · lines 136–142

    AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Mouse knockout; tissue-dependent phenotype. · source_derived_draft · unverified_draft

    ## lithium-bpnt1-loss-translation The accumulated by-product accompanied a failure of protein production. Bpnt1-deficient mice showed repressed translation, abnormal nucleoli and liver injury. Model: Mouse knockout; tissue-dependent phenotype. Limitations: Not evidence that routine lithium treatment causes this knockout syndrome. Evidence access: Primary abstract Role for cytoplasmic nucleotide hydrolysis in hepatic function and protein synthesis. · 2013 · https://pubmed.ncbi.nlm.nih.gov/23479625/ · DOI 10.1073/pnas.1205001110
    Complete structured claim and evidence

  3. 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

  4. 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

  5. Reducing PAP synthesis genetically rescued the Bpnt1-knockout phenotype.

    Reduced PAP synthesis in double-mutant mice → Mouse hepatic protein synthesis source_derived_draftungraded
    Experimental context and source evidence
    availability_state
    machinery_impairment Imported condition classification; unverified.
    evidence_access
    Primary abstract
    experimental_model
    Mouse double-mutant genetic experiment.
    limitations
    Does not justify sulfur restriction; a pathway perturbation is not a nutritional prescription.
    nutrient_topic
    Lithium collection; molecular form, preparation, species, exposure and manipulation remain explicit. · Lithium
    plain_language
    Reducing what enters a blocked pathway can rescue its consequences.
    primary_references
    Role for cytoplasmic nucleotide hydrolysis in hepatic function and protein synthesis. · 2013 · https://pubmed.ncbi.nlm.nih.gov/23479625/ · DOI 10.1073/pnas.1205001110
    trigger_kind
    machinery_impairment Imported condition classification; unverified.

    Lithium: metal-sensitive enzymes, transport and cross-nutrient mechanisms (2026-09-19) · lines 144–150

    AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Mouse double-mutant genetic experiment. · source_derived_draft · unverified_draft

    ## lithium-pap-synthesis-rescue Reducing what enters a blocked pathway can rescue its consequences. Reducing PAP synthesis genetically rescued the Bpnt1-knockout phenotype. Model: Mouse double-mutant genetic experiment. Limitations: Does not justify sulfur restriction; a pathway perturbation is not a nutritional prescription. Evidence access: Primary abstract Role for cytoplasmic nucleotide hydrolysis in hepatic function and protein synthesis. · 2013 · https://pubmed.ncbi.nlm.nih.gov/23479625/ · DOI 10.1073/pnas.1205001110
    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