Srr — Serine Racemase is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
| Gene Information | |
|---|---|
| Symbol | SRR |
| Full Name | Serine Racemase |
| Chromosome | 17 |
| NCBI Gene ID | 57328 |
| OMIM | 607521 |
| UniProt ID | Q9GZN8 |
| Ensembl ID | ENSG00000167751 |
SRR (Serine Racemase) is the enzyme responsible for converting L-serine to D-serine, a neuromodulator that acts as an endogenous co-agonist at NMDA receptors. D-serine plays crucial roles in synaptic plasticity, memory, and neurodegeneration. SRR is implicated in Alzheimer's disease, schizophrenia, and ischemic brain injury.
SRR catalyzes the racemization of L-serine to D-serine using pyridoxal 5'-phosphate (PLP) as a cofactor. D-serine is the primary endogenous co-agonist for NMDA receptors, modulating synaptic transmission and plasticity. SRR activity is regulated by phosphorylation, protein interactions, and cellular energy status.
Brain-enriched, particularly in cortex, hippocampus, and glia.
| Disease | Role in Disease |
|---|---|
| Alzheimer's Disease | D-serine dysregulation, NMDA receptor hypofunction, excitotoxicity |
| Schizophrenia | D-serine deficiency, NMDA receptor signaling |
| Stroke | Excitotoxicity, ischemic neuronal damage |
| Parkinson's Disease | Dopaminergic neuron survival, NMDA modulation |
SRR (Serine Racemase) is an enzyme that catalyzes the conversion of L-serine to D-serine, an endogenous NMDA receptor co-agonist. D-serine plays critical roles in NMDA receptor-mediated synaptic transmission, plasticity, and excitotoxicity.
SRR catalyzes:
| Approach | Strategy | Status |
|---|---|---|
| SRR inhibitors | Reduce D-serine | Research |
| D-serine supplementation | NMDAR modulation | Clinical trials |
SRR is expressed in brain (highest in hippocampus and cortex), spinal cord, and peripheral tissues. Expression is activity-dependent.
SRR catalyzes the racemization of L-serine to D-serine, the endogenous co-agonist of NMDA receptors.
D-serine released from astrocytes and neurons modulates NMDA receptor activity, synaptic plasticity, and learning and memory.
D-serine levels are altered in AD brains. NMDA receptor dysregulation contributes to excitotoxicity (PubMed: 10077666).
SRR polymorphisms are associated with schizophrenia. D-serine is a potential therapeutic agent (PubMed: 14572456).
Excessive D-serine release contributes to excitotoxic cell death after stroke (PubMed: 21458745).
D-serine supplementation trials in schizophrenia, SRR inhibitors for stroke treatment, and modulators of D-serine metabolism are under investigation.
The study of Srr — Serine Racemase has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.
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