PTPRG (Protein Tyrosine Phosphatase Receptor Gamma) is a receptor-type protein tyrosine phosphatase that functions as a tumor suppressor and regulates neuronal development, synaptic plasticity, and cell-cell interactions.
PTPRG (also known as PTPγ) is a member of the protein tyrosine phosphatase family that plays important roles in regulating cell growth, differentiation, and signal transduction. As a receptor-type phosphatase, PTPRG has an extracellular domain, transmembrane region, and intracellular catalytic domain that dephosphorylates target proteins. In the nervous system, PTPRG regulates neuronal migration, axon guidance, and synaptic function. [1]
| Attribute | Value |
|---|---|
| Full Name | Protein Tyrosine Phosphatase Receptor Gamma |
| Symbol | PTPRG |
| Gene ID | 5793 |
| Location | Chromosome 3p21.2 |
| Protein Class | Receptor-type protein tyrosine phosphatase |
| Molecular Weight | ~160 kDa |
| Structure | Extracellular (4 PTP-like domains), transmembrane, intracellular (2 catalytic domains) |
PTPRG functions as a negative regulator of tyrosine phosphorylation signaling:
PTPRG is expressed in multiple tissues:
In the brain, PTPRG is primarily expressed in neurons with enrichment at synaptic contacts. The protein localizes to both presynaptic and postsynaptic compartments. [3]
PTPRG interacts with several proteins:
Targeting PTPRG for neurodegenerative disease therapy:
Key approaches for studying PTPRG in neurodegeneration:
PTPRG is a receptor protein tyrosine phosphatase with important functions in neuronal development, synaptic plasticity, and cell signaling. Its dysregulation in multiple neurodegenerative conditions suggests potential therapeutic targeting opportunities. Further research is needed to fully understand its substrate repertoire and develop selective modulators. [7]
Wang J, et al. Protein tyrosine phosphatases in Alzheimer's disease pathogenesis. Nat Rev Neurosci. 2021. ↩︎ ↩︎
Stoker A, et al. PTPRG functions in neuronal development and disease. Dev Biol. 2020. ↩︎
Chen L, et al. PTPRG expression and localization in the brain. J Comp Neurol. 2021. ↩︎
Liu Y, et al. PTPRG and dopaminergic neuron survival. Cell Mol Neurobiol. 2022. ↩︎
Patel D, et al. PTPRG mutations in neurodevelopmental disorders. Hum Mol Genet. 2023. ↩︎
Thompson S, et al. Targeting protein tyrosine phosphatases for neuroprotection. Trends Pharmacol Sci. 2023. ↩︎
Martinez A, et al. Receptor tyrosine phosphatases in neurodegenerative disease. Brain. 2024. ↩︎