TGF-beta Receptor 1 (TGFβR1) Protein

TGF-beta Receptor 1 (TGFβR1) Protein

Overview

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">TGF-beta Receptor 1 (TGFβR1) Protein</th>
</tr>
<tr>
<td class="label">Isoform</td>
<td>Expression</td>
</tr>
<tr>
<td class="label">TGFβR1-A</td>
<td>Ubiquitous</td>
</tr>
<tr>
<td class="label">TGFβR1-B</td>
<td>[Neurons](/entities/neurons)</td>
</tr>
<tr>
<td class="label">Agent</td>
<td>Status</td>
</tr>
<tr>
<td class="label">TGF-β1</td>
<td>Preclinical</td>
</tr>
<tr>
<td class="label">Small molecule activators</td>
<td>Discovery</td>
</tr>
<tr>
<td class="label">Agent</td>
<td>Status</td>
</tr>
<tr>
<td class="label">SB-431542</td>
<td>Research use</td>
</tr>
<tr>
<td class="label">SD-208</td>
<td>Preclinical</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/aging" style="color:#ef9a9a">Aging</a>, <a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/carcinoma" style="color:#ef9a9a">Carcinoma</a>, <a href="/wiki/infection" style="color:#ef9a9a">Infection</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">74 edges</a></td>
</tr>
</table>

TGF-beta Receptor 1 (TGFβR1) Protein

Overview

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">TGF-beta Receptor 1 (TGFβR1) Protein</th>
</tr>
<tr>
<td class="label">Isoform</td>
<td>Expression</td>
</tr>
<tr>
<td class="label">TGFβR1-A</td>
<td>Ubiquitous</td>
</tr>
<tr>
<td class="label">TGFβR1-B</td>
<td>[Neurons](/entities/neurons)</td>
</tr>
<tr>
<td class="label">Agent</td>
<td>Status</td>
</tr>
<tr>
<td class="label">TGF-β1</td>
<td>Preclinical</td>
</tr>
<tr>
<td class="label">Small molecule activators</td>
<td>Discovery</td>
</tr>
<tr>
<td class="label">Agent</td>
<td>Status</td>
</tr>
<tr>
<td class="label">SB-431542</td>
<td>Research use</td>
</tr>
<tr>
<td class="label">SD-208</td>
<td>Preclinical</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/aging" style="color:#ef9a9a">Aging</a>, <a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/carcinoma" style="color:#ef9a9a">Carcinoma</a>, <a href="/wiki/infection" style="color:#ef9a9a">Infection</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">74 edges</a></td>
</tr>
</table>

TGF-beta Receptor 1 (TGFβR1) is a serine/threonine protein kinase encoded by the TGFbr1 gene on chromosome 9q22. It is a critical component of the transforming growth factor-beta (TGF-β) signaling pathway, which plays dual roles in both neuroprotection and neuroinflammation. TGF-β signaling is implicated in [Alzheimer's disease](/diseases/alzheimers-disease), [Parkinson's disease](/diseases/parkinsons-disease), and ALS, with complex context-dependent effects on neuronal survival and glial activation.

Structure

Protein Architecture

• Length: 503 amino acids
• Molecular Weight: ~56 kDa
• Domains:
• Extracellular domain (1-190): Glycine-serine rich (GS) domain for ligand binding
• Transmembrane domain (191-213): Single-pass membrane spanning helix
• Kinase domain (214-503): Serine/threonine kinase catalytic domain

Isoforms

Normal Function

TGF-β Signaling Cascade

• Binds TGF-β1, TGF-β2, and TGF-β3 ligands
• Partners with TGFβR2 for signal transduction
• Phosphorylates SMAD2/3 receptor-regulated SMADs
• Forms complexes with SMAD4 for nuclear translocation

Cellular Functions

• Regulation of cell proliferation and differentiation
• Extracellular matrix production and remodeling
• Immune modulation and anti-inflammatory responses
• Neurogenesis and synaptic plasticity

Role in Neurodegeneration

Alzheimer's Disease

• TGF-β signaling reduces Aβ production via [BACE1](/entities/bace1) inhibition
• Promotes Aβ clearance through upregulated MMP-9
• TGFβR1 deficiency exacerbates amyloid pathology in mouse models[@tesseur2006]

• Dual role: protective anti-inflammatory vs. pro-inflammatory switching
• Loss of TGFβR1 in [microglia](/cell-types/microglia-neuroinflammation) enhances neurotoxic phenotype
• Age-related TGF-β signaling decline contributes to chronic inflammation[@wysscoray2016]

• SMAD signaling intersects with [GSK-3β](/entities/gsk3-beta) and tau kinases
• TGFβR1 activation reduces tau phosphorylation in vitro[@hutton2011]

Parkinson's Disease

• TGF-β protects dopaminergic neurons from MPTP toxicity[@mcgeer1998]
• TGFβR1 signaling modulates [α-synuclein](/proteins/alpha-synuclein) aggregation
• Involved in glial scar formation in PD substantia nigra[@deppe2022]

Amyotrophic Lateral Sclerosis (ALS)

• Elevated TGF-β in ALS patients and mouse models
• TGFβR1 contributes to astrocyte reactivity
• Modulates motor neuron susceptibility to excitotoxicity[@endo2015]

Therapeutic Targeting

Agonists

Antagonists

See Also

• [Alzheimer's disease](/diseases/alzheimers-disease)
• [Parkinson's disease](/diseases/parkinsons-disease)
• [TGF-beta signaling pathway](/mechanisms/tgf-beta-signaling-pathway)

External Links

• [PubMed](https://pubmed.ncbi.nlm.nih.gov/)
• [KEGG Pathways](https://www.genome.jp/kegg/pathway.html)

References