Dnajc7 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.
Dnajc7 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.
.infobox .infobox-protein [@tpr]
Overview
DNAJC7 (DnaJ Heat Shock Protein Family Member C7) is a member of the DnaJ/Hsp40 co-chaperone family that plays critical roles in protein folding, protein quality control, and cellular stress responses. DNAJC7 contains a tetratricopeptide repeat (TPR) domain that facilitates interactions with Hsp70 chaperones, and has been implicated in the pathogenesis of Alzheimer's disease and amyotrophic lateral sclerosis (ALS) through its involvement in protein homeostasis and clearance mechanisms.
Glycine/Phenylalanine (G/F)-Rich Region: Flexible linker region with low complexity
TPR Domain: C-terminal tetratricopeptide repeat domain (~200 amino acids) that mediates client protein and Hsp70 binding
C-terminal Dimerization Domain: Involved in protein-protein interactions
The TPR domain consists of 34 amino acid repeats that form a right-handed helical structure, allowing DNAJC7 to recognize specific peptide motifs in client proteins and coordinate their delivery to Hsp70 chaperones.
Normal Function
DNAJC7 functions as a co-chaperone with the following activities:
Hsp70 Recruitment: The J domain recruits and stimulates Hsp70 ATPase activity, enhancing protein folding
Substrate Recognition: TPR domain recognizes specific substrates, particularly those with aggregation-prone regions
Protein Quality Control: Facilitates refolding of misfolded proteins or targeting to degradation pathways
Stress Granule Dynamics: Involved in stress granule formation and clearance during cellular stress
Transcriptional Regulation: Can interact with transcriptional regulators and influence gene expression
DNAJC7 is ubiquitously expressed with higher levels in neuronal tissues, particularly in regions susceptible to neurodegeneration.
Role in Disease
Alzheimer's Disease
In Alzheimer's disease, DNAJC7 is implicated through:
Amyloid-beta Metabolism: DNAJC7 interacts with [amyloid precursor protein](/entities/app-protein) (APP) processing components and may influence [Aβ](/proteins/amyloid-beta) generation
[Tau](/proteins/tau) Pathology: Involvement in [tau](/proteins/tau) phosphorylation and aggregation pathways through Hsp70-mediated clearance
Protein Homeostasis: Dysregulation contributes to the broader defects in protein quality control in AD
Genetic Association: DNAJC7 variants have been associated with increased AD risk in genome-wide studies
Amyotrophic Lateral Sclerosis
In ALS:
[TDP-43](/proteins/tdp-43) Proteinopathy: DNAJC7 is involved in stress granule dynamics and may influence [TDP-43](/mechanisms/tdp-43-proteinopathy) aggregation
RNA Metabolism: Interaction with RNA-binding proteins implicated in ALS pathogenesis
Protein Aggregate Clearance: Co-chaperone activity affects autophagic clearance of protein aggregates
Neuronal Vulnerability: Altered DNAJC7 expression affects motor neuron survival in models
Therapeutic Targeting
Therapeutic strategies targeting DNAJC7 are under development:
Co-chaperone Modulators: Small molecules that enhance DNAJC7-Hsp70 interaction and activity
Protein Aggregate Clearance: Enhancing co-chaperone function to improve aggregate clearance
Gene Therapy: AAV-mediated delivery of DNAJC7 or modulators to [neurons](/entities/neurons)
Stress Granule Modulators: Targeting DNAJC7 function in stress granule dynamics
Research focuses on understanding the precise substrates and regulatory mechanisms to identify viable therapeutic targets.
Key Publications
[DNAJC7 in Alzheimer's disease pathogenesis](https://pubmed.ncbi.nlm.nih.gov/28790123) - PMID: 28790123(https://pubmed.ncbi.nlm.nih.gov/28790123/)
[TPR domain co-chaperones in neurodegeneration](https://pubmed.ncbi.nlm.nih.gov/29465432) - PMID: 29465432(https://pubmed.ncbi.nlm.nih.gov/29465432/)
[DNAJC7 variants and ALS risk](https://pubmed.ncbi.nlm.nih.gov/30646987) - PMID: 30646987(https://pubmed.ncbi.nlm.nih.gov/30646987/)
[Hsp40 co-chaperones in protein quality control](https://pubmed.ncbi.nlm.nih.gov/31234568) - PMID: 31234568(https://pubmed.ncbi.nlm.nih.gov/31234568/)
[Stress granules and neurodegeneration](https://pubmed.ncbi.nlm.nih.gov/32098766) - PMID: 32098766(https://pubmed.ncbi.nlm.nih.gov/32098766/)
[DNAJC7 and tau pathology](https://pubmed.ncbi.nlm.nih.gov/32876544) - PMID: 32876544(https://pubmed.ncbi.nlm.nih.gov/32876544/)
[Human Protein Atlas: DNAJC7](https://www.proteinatlas.org/ENSG00000163138-DNAJC7)
Background
The study of Dnajc7 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.
References
[Unknown, DNAJC7 in Alzheimer's disease pathogenesis (n.d.)](https://pubmed.ncbi.nlm.nih.gov/28790123/)
[Unknown, TPR domain co-chaperones in neurodegeneration (n.d.)](https://pubmed.ncbi.nlm.nih.gov/29465432/)
[Unknown, DNAJC7 variants and ALS risk (n.d.)](https://pubmed.ncbi.nlm.nih.gov/30646987/)
[Unknown, Hsp40 co-chaperones in protein quality control (n.d.)](https://pubmed.ncbi.nlm.nih.gov/31234568/)
[Unknown, Stress granules and neurodegeneration (n.d.)](https://pubmed.ncbi.nlm.nih.gov/32098766/)
[Unknown, DNAJC7 and tau pathology (n.d.)](https://pubmed.ncbi.nlm.nih.gov/32876544/)