TGF-β Receptor 1 (TGFBR1) Protein

TGF-β Receptor 1 (TGFBR1) Protein

Introduction

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">TGF-β Receptor 1 (TGFBR1) Protein</th>
</tr>
<tr>
<td class="label">Protein Name</td>
<td>TGF-β Receptor 1</td>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>TGFBR1</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>P36897</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>53 kDa</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>503 amino acids</td>
</tr>
<tr>
<td class="label">PDB Structures</td>
<td>1B6C, 1IAS, 1M9X, 2PJY</td>
</tr>
<tr>
<td class="label">Subcellular Localization</td>
<td>Plasma membrane, endosomes</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

TGF-β Receptor 1 (TGFBR1) is a transmembrane serine/threonine kinase that serves as the primary type I receptor for transforming growth factor-beta ligands in the nervous system. This protein plays critical roles in mediating TGF-β signaling that regulates neuroinflammation, neuronal survival, synaptic plasticity, and glial function.

Overview

TGF-β Receptor 1 (TGFBR1) Protein

Introduction

<table class="infobox infobox-protein">
<tr>
<th class="infobox-header" colspan="2">TGF-β Receptor 1 (TGFBR1) Protein</th>
</tr>
<tr>
<td class="label">Protein Name</td>
<td>TGF-β Receptor 1</td>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>TGFBR1</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>P36897</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>53 kDa</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>503 amino acids</td>
</tr>
<tr>
<td class="label">PDB Structures</td>
<td>1B6C, 1IAS, 1M9X, 2PJY</td>
</tr>
<tr>
<td class="label">Subcellular Localization</td>
<td>Plasma membrane, endosomes</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

TGF-β Receptor 1 (TGFBR1) is a transmembrane serine/threonine kinase that serves as the primary type I receptor for transforming growth factor-beta ligands in the nervous system. This protein plays critical roles in mediating TGF-β signaling that regulates neuroinflammation, neuronal survival, synaptic plasticity, and glial function.

Overview

TGFBR1 (Transforming Growth Factor Beta Receptor 1) is a 53 kDa transmembrane receptor kinase that transduces extracellular TGF-β signals into cellular responses[@massague2000]. As the primary type I receptor, TGFBR1 phosphorylates downstream SMAD proteins (SMAD2/3) to regulate gene expression programs controlling neuronal survival, neuroinflammation, and synaptic plasticity[@todo2020].

Protein Information

Protein Structure

Extracellular Domain (1-190 aa)

The extracellular domain contains:

• cysteine-rich domain (CR): Mediates ligand binding and receptor oligomerization
• Glycine-serine (GS) rich region: Flexible linker connecting extracellular and transmembrane domains

Transmembrane Domain (191-213 aa)

Single-pass alpha-helical transmembrane domain anchors the receptor in the plasma membrane.

Kinase Domain (214-503 aa)

The cytoplasmic serine/threonine kinase domain contains:

• Activation loop: Contains key serine residues (Ser465, Ser467) phosphorylated by type II receptor
• GS domain: Region containing multiple glycine-serine repeats that regulates kinase activity
• Substrate binding pocket: Recognizes SMAD2/3 proteins

Normal Function in the Nervous System

TGF-β Signal Transduction

Neuroprotective Effects

• Mediates TGF-β-induced neuronal survival against oxidative stress[@kane2018]
• Regulates neuroinflammatory responses in [microglia](/cell-types/microglia-neuroinflammation) and [astrocytes](/entities/astrocytes)[@brionne2021]
• Controls [blood-brain barrier](/entities/blood-brain-barrier) integrity and function[@tichauer2020]
• Modulates synaptic plasticity and cognitive function[@ferguson2019]

Role in Disease

Alzheimer's Disease

• TGFBR1 signaling is dysregulated in AD brain tissue[@caraci2021]
• Impaired TGF-β signaling contributes to increased neuroinflammation[@wysscoray2020]
• Reduced TGFBR1 expression correlates with cognitive decline[@mousseau2021]
• May affect [amyloid-beta](/proteins/amyloid-beta) clearance mechanisms[@wysscoray2020a]

Parkinson's Disease

• TGFBR1 activation protects dopaminergic [neurons](/entities/neurons) from oxidative damage[@rai2022]
• TGF-β signaling modulates [alpha-synuclein](/proteins/alpha-synuclein) aggregation[@reynolds2021]
• Altered receptor expression in PD substantia nigra[@tong2019]

Amyotrophic Lateral Sclerosis

• TGFBR1 influences motor neuron survival through neuroimmune modulation[@dormann2020]
• Dysregulated TGF-β signaling in ALS motor [cortex](/brain-regions/cortex)[@ilieva2019]

Therapeutic Targeting

Kinase Inhibitors

• SB-525334: Selective TGFBR1 inhibitor[@gellibert2006]
• SD-208: TGF-β type I receptor inhibitor[@fu2020]
• LY2109761: TGFBR1/2 dual inhibitor[@zhang2019]

Agonists

• TGF-β1: Endogenous ligand for neuroprotective signaling[@sakauchi2021]
• Small molecule agonists: Being developed for CNS applications[@akhurst2021]

Key Publications

See Also

• [TGFBR1 Gene](/genes/tgfrb1)
• [TGFBR2 Gene](/genes/tgfrb2)
• [TGFBR2 Protein](/proteins/tgfrb2-protein)
• [SMAD2 Protein](/proteins/smad2-protein)
• [SMAD3 Protein](/proteins/smad3-protein)
• [TGF-β Signaling Pathway](/mechanisms/tgf-beta-signaling-pathway)

Background

The study of Tgf Β Receptor 1 (Tgfbr1) Protein 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.

External Links

• [PubMed](https://pubmed.ncbi.nlm.nih.gov/) - Biomedical literature
• [Alzheimer's Disease Neuroimaging Initiative](https://adni.loni.usc.edu/) - Research data
• [Allen Brain Atlas](https://brain-map.org/) - Brain gene expression data

References