Component
Mouse serine racemase / Srr
Context-specific entity; species, compartment and exposure are stated on each claim.
4 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 it acts on
Srr-knockout mouse forebrain had less D-aspartate without detected differences in DDO activity or L-aspartate concentrations.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- evidence_access
- Primary abstract
- experimental_model
- Mouse frontal cortex, hippocampus and striatum; cerebellum unaffected.
- limitations
- Association supported a production hypothesis; it did not independently identify the complete biosynthetic pathway.
- nutrient_topic
- D-Aspartate collection; species, compartment, exposure, co-substrates and manipulation remain explicit. · D-Aspartate
- plain_language
- A smaller pool was not explained by higher measured breakdown or lower L-aspartate.
- primary_references
- Decreased levels of free D-aspartic acid in the forebrain of serine racemase (Srr) knock-out mice. · 2013 · https://pubmed.ncbi.nlm.nih.gov/23439386/ · DOI 10.1016/j.neuint.2013.02.015
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
D-Aspartate: synthesis, clearance, neural and endocrine mechanisms (2026-09-19) · lines 48–54
AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Mouse frontal cortex, hippocampus and striatum; cerebellum unaffected. · source_derived_draft · unverified_draft
## d-aspartate-srr-loss-ddo-control A smaller pool was not explained by higher measured breakdown or lower L-aspartate. Srr-knockout mouse forebrain had less D-aspartate without detected differences in DDO activity or L-aspartate concentrations. Model: Mouse frontal cortex, hippocampus and striatum; cerebellum unaffected. Limitations: Association supported a production hypothesis; it did not independently identify the complete biosynthetic pathway. Evidence access: Primary abstract Decreased levels of free D-aspartic acid in the forebrain of serine racemase (Srr) knock-out mice. · 2013 · https://pubmed.ncbi.nlm.nih.gov/23439386/ · DOI 10.1016/j.neuint.2013.02.015
Complete structured claim and evidenceSrr deletion lowered D-aspartate in mouse frontal cortex and hippocampus, while cerebellum and testes were unchanged.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- evidence_access
- Primary abstract
- experimental_model
- Srr-knockout mice; regional amino-acid measurements.
- limitations
- Not dietary deficiency or proof that a supplement repairs the knockout.
- nutrient_topic
- D-Aspartate collection; species, compartment, exposure, co-substrates and manipulation remain explicit. · D-Aspartate
- plain_language
- Dependence on the same enzyme varies by tissue.
- primary_references
- Serine racemase is involved in d-aspartate biosynthesis. · 2016 · https://pubmed.ncbi.nlm.nih.gov/27387750/ · DOI 10.1093/jb/mvw043
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
D-Aspartate: synthesis, clearance, neural and endocrine mechanisms (2026-09-19) · lines 40–46
AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Srr-knockout mice; regional amino-acid measurements. · source_derived_draft · unverified_draft
## d-aspartate-srr-mouse-loss Dependence on the same enzyme varies by tissue. Srr deletion lowered D-aspartate in mouse frontal cortex and hippocampus, while cerebellum and testes were unchanged. Model: Srr-knockout mice; regional amino-acid measurements. Limitations: Not dietary deficiency or proof that a supplement repairs the knockout. Evidence access: Primary abstract Serine racemase is involved in d-aspartate biosynthesis. · 2016 · https://pubmed.ncbi.nlm.nih.gov/27387750/ · DOI 10.1093/jb/mvw043
Complete structured claim and evidence
What acts on it
Intracellular glycine tonically inhibited serine racemase in the study, while glycine exposure could transiently promote D-serine release through Asc-1.
Experimental context and source evidence
- evidence_access
- Primary abstract
- experimental_model
- Biochemical assays, primary cultures and mouse microdialysis; Asc-1 knockout abolished the release response.
- limitations
- Inhibition of synthesis and stimulation of release are distinct endpoints, not contradictory directions for one reaction.
- nutrient_topic
- L-Serine collection; species, compartment, exposure, co-substrates and manipulation remain explicit. · L-Serine
- plain_language
- The same neighboring amino acid can affect both production and release in different ways.
- primary_references
- The NMDA receptor activation by d-serine and glycine is controlled by an astrocytic Phgdh-dependent serine shuttle. · 2019 · https://pubmed.ncbi.nlm.nih.gov/31548413/ · DOI 10.1073/pnas.1909458116
L-Serine: synthesis, one-carbon metabolism, lipids and cross-nutrient mechanisms (2026-09-19) · lines 358–364
AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Biochemical assays, primary cultures and mouse microdialysis; Asc-1 knockout abolished the release response. · source_derived_draft · unverified_draft
## l-serine-glycine-racemase The same neighboring amino acid can affect both production and release in different ways. Intracellular glycine tonically inhibited serine racemase in the study, while glycine exposure could transiently promote D-serine release through Asc-1. Model: Biochemical assays, primary cultures and mouse microdialysis; Asc-1 knockout abolished the release response. Limitations: Inhibition of synthesis and stimulation of release are distinct endpoints, not contradictory directions for one reaction. Evidence access: Primary abstract The NMDA receptor activation by d-serine and glycine is controlled by an astrocytic Phgdh-dependent serine shuttle. · 2019 · https://pubmed.ncbi.nlm.nih.gov/31548413/ · DOI 10.1073/pnas.1909458116
Complete structured claim and evidence
Where it participates (unsigned role)
Astrocytic Phgdh inhibition reduced newly synthesized L- and D-serine; neuronal serine-racemase deletion reduced D-serine synthesis to a similar extent.
Experimental context and source evidence
- availability_state
- machinery_impairment Imported condition classification; unverified.
- evidence_access
- Primary abstract
- experimental_model
- Mouse genetic and hippocampal experiments with synthesis measurements.
- limitations
- This does not establish exclusive cell-type localization under every developmental or disease condition.
- nutrient_topic
- L-Serine collection; species, compartment, exposure, co-substrates and manipulation remain explicit. · L-Serine
- plain_language
- Support cells can supply precursor while neurons perform the final conversion.
- primary_references
- The NMDA receptor activation by d-serine and glycine is controlled by an astrocytic Phgdh-dependent serine shuttle. · 2019 · https://pubmed.ncbi.nlm.nih.gov/31548413/ · DOI 10.1073/pnas.1909458116
- trigger_kind
- machinery_impairment Imported condition classification; unverified.
L-Serine: synthesis, one-carbon metabolism, lipids and cross-nutrient mechanisms (2026-09-19) · lines 342–348
AI-assisted research curation; primary references, access levels and experimental limitations individually identified. Not publisher full text. · supports · Mouse genetic and hippocampal experiments with synthesis measurements. · source_derived_draft · unverified_draft
## l-serine-astrocyte-shuttle Support cells can supply precursor while neurons perform the final conversion. Astrocytic Phgdh inhibition reduced newly synthesized L- and D-serine; neuronal serine-racemase deletion reduced D-serine synthesis to a similar extent. Model: Mouse genetic and hippocampal experiments with synthesis measurements. Limitations: This does not establish exclusive cell-type localization under every developmental or disease condition. Evidence access: Primary abstract The NMDA receptor activation by d-serine and glycine is controlled by an astrocytic Phgdh-dependent serine shuttle. · 2019 · https://pubmed.ncbi.nlm.nih.gov/31548413/ · DOI 10.1073/pnas.1909458116
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.