PLAA Protein (Phospholipase A2 Activating Protein)

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PLAA Protein (Phospholipase A2 Activating Protein)

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PLAA Protein (Phospholipase A2 Activating Protein)

Overview

Plaa Protein (Phospholipase A2 Activating Protein) 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

Plaa Protein (Phospholipase A2 Activating Protein) is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes. [@ref1995a]

<div class="infobox infobox-protein"> [@ref1999]

PLAA [@ref2007]

| | |
|---|---|
| Protein Name | PLAA |
| Gene | [PLAA](/genes/plaa) |
| UniProt ID | [Q9NSC7](https://www.uniprot.org/uniprot/Q9NSC7) |
| Molecular Weight | ~90 kDa |
| Subcellular Localization | Cytoplasm, nucleus |
| Protein Family | PLAA family |
| Associated Diseases | [Neurodegeneration](/diseases/neurodegeneration), [Alzheimer's Disease](/diseases/alzheimers-disease), [Inflammatory Diseases](/diseases/neuroinflammation) |

</div>

Structure

PLAA is a multi-domain protein containing:

An N-terminal domain with unknown function
A central WD40 repeat domain involved in protein-protein interactions
A PFU (PLAA family ubiquitin-binding) domain at the C-terminus

...

PLAA Protein (Phospholipase A2 Activating Protein)

Overview

Plaa Protein (Phospholipase A2 Activating Protein) 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

Plaa Protein (Phospholipase A2 Activating Protein) is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes. [@ref1995a]

<div class="infobox infobox-protein"> [@ref1999]

PLAA [@ref2007]

| | |
|---|---|
| Protein Name | PLAA |
| Gene | [PLAA](/genes/plaa) |
| UniProt ID | [Q9NSC7](https://www.uniprot.org/uniprot/Q9NSC7) |
| Molecular Weight | ~90 kDa |
| Subcellular Localization | Cytoplasm, nucleus |
| Protein Family | PLAA family |
| Associated Diseases | [Neurodegeneration](/diseases/neurodegeneration), [Alzheimer's Disease](/diseases/alzheimers-disease), [Inflammatory Diseases](/diseases/neuroinflammation) |

</div>

Structure

PLAA is a multi-domain protein containing:

An N-terminal domain with unknown function
A central WD40 repeat domain involved in protein-protein interactions
A PFU (PLAA family ubiquitin-binding) domain at the C-terminus

The PFU domain is structurally unique and binds ubiquitin through a hydrophobic pocket, allowing PLAA to function as a ubiquitin receptor in various cellular processes. PLAA forms homodimers and can also associate with other proteins to form larger complexes.

Normal Function in the Nervous System

PLAA has multiple cellular functions:

cPLA2 activation: PLAA acts as a co-activator for cytosolic phospholipase A2 (cPLA2), enhancing its activity and promoting arachidonic acid release. This is the rate-limiting step in eicosanoid (prostaglandins, leukotrienes) synthesis.

[Ubiquitin-proteasome system](/mechanisms/ubiquitin-proteasome-system): Through its PFU domain, PLAA binds ubiquitinated substrates and delivers them to the proteasome for degradation. This function is crucial for protein quality control.

[Autophagy](/entities/autophagy): PLAA is involved in selective autophagy through its ubiquitin-binding function, helping to clear damaged organelles and protein aggregates.

ER-associated degradation (ERAD): PLAA participates in retrotranslocation of misfolded proteins from the ER for cytosolic degradation.

Role in Disease

PLAA dysfunction contributes to neurodegeneration through several mechanisms:

Alzheimer's Disease:

PLAA regulates [amyloid-beta](/proteins/amyloid-beta) production through cPLA2-mediated signaling
Impaired ubiquitin-proteasome function leads to accumulation of toxic proteins
Altered neuroinflammatory responses due to eicosanoid dysregulation

Protein aggregation:

Impaired clearance of misfolded proteins and aggregates
Dysfunctional autophagic-lysosomal pathway
ER stress due to accumulated misfolded proteins

Neuroinflammation:

Elevated cPLA2 activity promotes pro-inflammatory eicosanoids
Chronic neuroinflammation accelerates neurodegeneration

Therapeutic Targeting

Therapeutic strategies targeting PLAA:

cPLA2 inhibitors: Pyrrolidine derivatives and natural compounds inhibiting cPLA2 are being developed to reduce neuroinflammation.

Proteostasis modulators: Enhancing proteasome activity to compensate for PLAA-mediated degradation defects.

Anti-inflammatory approaches: Targeting downstream inflammatory pathways activated by eicosanoids.

Autophagy enhancers: Promoting clearance of protein aggregates through autophagy.

Key Publications

[UniProt Entry](https://www.uniprot.org/uniprot/Q9NSC7)

[NCBI Gene Entry](https://www.ncbi.nlm.nih.gov/gene/9379)

Cross-Links

[Gene: PLAA](/genes/plaa)
[Neurodegeneration](/diseases/neurodegeneration), [Alzheimer's Disease](/diseases/alzheimers-disease), [Inflammatory Diseases](/diseases/neuroinflammation)

Overview

Plaa Protein (Phospholipase A2 Activating Protein) 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 Plaa Protein (Phospholipase A2 Activating 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

[Unknown, 8622658 (1995)](https://doi.org/10.1089/dna.1995.14.939)

[Unknown, 10428831 (1995)](https://doi.org/10.1016/0929-7855(95)

[Unknown, 10802652 (1999)](https://pubmed.ncbi.nlm.nih.gov/10802652/)

[Unknown, 18516045 (2007)](https://doi.org/10.1016/j.cellsig.2006.12.011)

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Related Entities

PLAAPROTEIN

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📊 Evidence Profile Foundational

Evidence Balance

+0%

Certainty

50%

Debates

0

Incoming

10

Outgoing

11

0 supporting 0 contradicting 0 neutral

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📗 Cite This Artifact

PLAA Protein (Phospholipase A2 Activating Protein)

PLAA Protein (Phospholipase A2 Activating Protein)

Overview

Introduction

Structure

PLAA Protein (Phospholipase A2 Activating Protein)

Overview

Introduction

Structure

Normal Function in the Nervous System

Role in Disease

Therapeutic Targeting

Key Publications

Cross-Links

Overview

Background

See Also

External Links

References

💬 Discussion