PGK1 Gene
Overview
Mermaid diagram (expand to render)
<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">PGK1 Gene</th>
</tr>
<tr>
<td class="label">Symbol</td>
<td>PGK1</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Phosphoglycerate Kinase 1</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>Xq21.1</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>5230</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>311800</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000102144</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>P00558</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>417 amino acids</td>
</tr>
<tr>
<td class="label">Molecular Weight</td>
<td>44.6 kDa</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td><a href="/wiki/als" style="color:#ef9a9a">Als</a>, <a href="/wiki/breast-cancer" style="color:#ef9a9a">Breast Cancer</a>, <a href="/wiki/cancer" style="color:#ef9a9a">Cancer</a>, <a href="/wiki/carcinoma" style="color:#ef9a9a">Carcinoma</a>, <a href="/wiki/glioblastoma" style="color:#ef9a9a">Glioblastoma</a></td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">67 edges</a></td>
</tr>
</table>
Pgk1 Gene plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
Introduction
PGK1 (Phosphoglycerate Kinase 1) encodes a crucial glycolytic enzyme that catalyzes the first ATP-generating step in the glycolytic pathway. PGK1 is essential for cellular energy production and has been increasingly implicated in neurodegeneration through metabolic dysfunction, mitochondrial impairment, and bioenergetic crisis in Alzheimer's Disease (AD), Parkinson's Disease (PD), and Amyotrophic Lateral Sclerosis (ALS). The gene is located on chromosome Xq21.1 and encodes a 417-amino acid protein that is highly expressed in brain tissue. [@zhang2020]
Protein Structure
PGK1 is a bilobal enzyme consisting of:
- N-terminal domain (residues 1-195): Contains the 3-phosphoglycerate (3-PG) binding site
- C-terminal domain (residues 196-417): Contains the ATP/ADP binding site
- Interdomain hinge region: Flexible linker allowing conformational changes during catalysis
The enzyme undergoes dramatic conformational changes during its catalytic cycle, transitioning from an open (substrate-free) to a closed (substrate-bound) conformation.
Normal Function
PGK1 catalyzes the reversible conversion of 1,3-bisphosphoglycerate (1,3-BPG) to 3-phosphoglycerate (3-PG), generating ATP:
1,3-Bisphosphoglycerate + ADP ↔ 3-Phosphoglycerate + ATP
This is the first substrate-level phosphorylation step in glycolysis, generating ATP independently of oxidative phosphorylation.
Brain Expression and Localization
- PGK1 is highly expressed in [neurons](/entities/neurons) and [astrocytes](/entities/astrocytes)
- Cytoplasmic localization with potential mitochondrial association
- Expression is activity-dependent, upregulated during neuronal activation
- Alternative splicing generates tissue-specific isoforms
Role in Neurodegeneration
Alzheimer's Disease
PGK1 dysfunction in AD is well-documented:
- Reduced PGK1 activity in AD brains correlates with disease severity (PMID:19340089)
- [Amyloid-beta](/proteins/amyloid-beta) toxicity directly inhibits PGK1 enzymatic activity (PMID:2154414)
- Cerebral hypometabolism in AD involves impaired glycolysis at the PGK1 step
- PGK1 levels are reduced in vulnerable brain regions ([hippocampus](/brain-regions/hippocampus), entorhinal cortex)
- The enzyme is sensitive to oxidative modification, losing activity under oxidative stress
Parkinson's Disease
- Metabolic vulnerability of dopaminergic neurons involves impaired glycolytic capacity
- PGK1 activity is reduced in substantia nigra of PD patients
- Mitochondrial complex I deficiency increases reliance on glycolysis, which is compromised
- [Alpha-synuclein](/proteins/alpha-synuclein) aggregation may directly inhibit glycolytic enzymes including PGK1
Amyotrophic Lateral Sclerosis
- Glycolytic dysfunction is an early event in ALS pathogenesis
- PGK1 mutations have been identified in some ALS cases
- Energy crisis in motor neurons involves multiple glycolytic enzyme defects
Huntington's Disease
- PGK1 activity is impaired in HD models and patient tissue
- Metabolic deficits contribute to neuronal dysfunction
- Glycolytic enhancers show promise in HD models
Therapeutic Implications
- Pyruvate kinase activators: May help compensate for downstream glycolytic defects
- ATP supplementation approaches: Experimental strategies to address energy deficit
- Glucose metabolism optimization: Dietary and pharmacological approaches
Gene Therapy
- AAV-mediated PGK1 overexpression is being explored in preclinical models
- Promising results in mouse models of AD and PD
Interaction Network
PGK1 interacts with:
- PKM2 (Pyruvate kinase M2): Downstream glycolytic enzyme
- GAPDH: Upstream glycolytic enzyme
- TPI1 (Triose phosphate isomerase): Direct substrate channeling
- LDHA (Lactate dehydrogenase A): Regenerates NAD+ for glycolysis
- Mitochondrial proteins: Potential metabolic coupling
- Hsp90: Chaperone involvement in protein stability
See Also
- [Glycolysis Pathway](/mechanisms/glycolysis)
- [Alzheimer's Disease](/diseases/alzheimers-disease)
- [Parkinson's Disease](/diseases/parkinsons-disease)
- [Amyotrophic Lateral Sclerosis](/diseases/amyotrophic-lateral-sclerosis)
- [Mitochondrial Dysfunction](/mechanisms/mitochondrial-dysfunction)
- [Metabolic Therapy](/therapeutics/metabolic-therapy)
- [GAPDH Gene](/genes/gapdh)
- [PKM Gene](/genes/pkm)
Overview
Pgk1 Gene plays an important role in the study of neurodegenerative diseases. This page provides comprehensive information about this topic, including its mechanisms, significance in disease processes, and therapeutic implications.
Background
The study of Pgk1 Gene 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
- [NCBI Gene: PGK1](https://www.ncbi.nlm.nih.gov/gene/5230)
- [UniProt: P00558](https://www.uniprot.org/uniprot/P00558)
- [Ensembl: ENSG00000102144](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000102144)
- [GeneCards: PGK1](https://www.genecards.org/cgi-bin/carddisp.pl?gene=PGK1)
References
[Sorensen M, et al, (2019) (2019)](https://pubmed.ncbi.nlm.nih.gov/30614921/)
[Zhang Y, et al, (2020) (2020)](https://pubmed.ncbi.nlm.nih.gov/32814021/)
[Butterfield DA, et al, (2010) (2010)](https://pubmed.ncbi.nlm.nih.gov/19340089/)
[Manczak M, et al, (2011) (2011)](https://pubmed.ncbi.nlm.nih.gov/21732173/)
[Liang WS, et al, (2008) (2008)](https://pubmed.ncbi.nlm.nih.gov/17466456/)
[Hynd MR, et al, (2004) (2004)](https://pubmed.ncbi.nlm.nih.gov/15056466/)Pathway Diagram
The following diagram shows the key molecular relationships involving PGK1 Gene discovered through SciDEX knowledge graph analysis:
Mermaid diagram (expand to render)