DNAJC1 Gene - DnaJ Heat Shock Protein Family Member 1

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DNAJC1 Gene - DnaJ Heat Shock Protein Family Member 1

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DNAJC1 — DnaJ Heat Shock Protein Family (Hsp40) Member 1

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">DNAJC1 Gene - DnaJ Heat Shock Protein Family Member 1</th>
</tr>
<tr>
<td class="label">Official Symbol</td>
<td>DNAJC1</td>
</tr>
<tr>
<td class="label">Official Full Name</td>
<td>DnaJ Heat Shock Protein Family (Hsp40) Member 1</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>10p13</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>1557</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>611452</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000070214</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>Q9Y4F5</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>~354 amino acids</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>DnaJ/Hsp40 chaperone family</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

Introduction

...

DNAJC1 — DnaJ Heat Shock Protein Family (Hsp40) Member 1

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">DNAJC1 Gene - DnaJ Heat Shock Protein Family Member 1</th>
</tr>
<tr>
<td class="label">Official Symbol</td>
<td>DNAJC1</td>
</tr>
<tr>
<td class="label">Official Full Name</td>
<td>DnaJ Heat Shock Protein Family (Hsp40) Member 1</td>
</tr>
<tr>
<td class="label">Chromosomal Location</td>
<td>10p13</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>1557</td>
</tr>
<tr>
<td class="label">OMIM</td>
<td>611452</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>ENSG00000070214</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>Q9Y4F5</td>
</tr>
<tr>
<td class="label">Protein Length</td>
<td>~354 amino acids</td>
</tr>
<tr>
<td class="label">Protein Family</td>
<td>DnaJ/Hsp40 chaperone family</td>
</tr>
<tr>
<td class="label">KG Connections</td>
<td><a href="/atlas" style="color:#4fc3f7">1 edges</a></td>
</tr>
</table>

Introduction

DNAJC1 (DnaJ Heat Shock Protein Family Member 1), also known as DNAJA3 or HTJ1, is a molecular chaperone belonging to the DnaJ/Hsp40 family of co-chaperones. The DNAJC1 gene encodes a protein that assists Hsp70 family proteins in various cellular processes including protein folding, protein quality control, and cellular stress responses. While originally characterized for its role in spermatogenesis, emerging research suggests potential involvement in neurodegenerative diseases through mechanisms of protein homeostasis and cellular stress management. [@hsp2020]

The DNAJC family of proteins represents a diverse group of co-chaperones that work in conjunction with Hsp70 proteins to facilitate protein folding, prevent aggregation, and target misfolded proteins for degradation. DNAJC1 specifically contains the characteristic J domain that distinguishes it as a DnaJ-type chaperone, enabling it to stimulate the ATPase activity of partner Hsp70 proteins and coordinate substrate hand-off. [@kakkar2022]

Gene and Protein Structure

Domain Architecture

DNAJC1 contains the characteristic domains of DnaJ-type chaperones:

J Domain: The N-terminal J domain (~70 amino acids) is the defining feature of DnaJ proteins. This domain stimulates the ATPase activity of Hsp70 partners, facilitating the handover of substrates. The J domain contains the highly conserved HPD motif critical for interaction with Hsp70. [@abravaya2019]
Gly/Phe-Rich Region: A flexible Gly/Phe-rich region links the J domain to the C-terminal substrate-binding domain. This region is variable in length and contributes to protein-protein interactions.
C-Terminal Substrate-Binding Domain: This region binds hydrophobic peptide segments of client proteins, facilitating their transfer to Hsp70. The substrate-binding domain contains a variable region that determines client protein specificity.

Signal Transduction and Molecular Functions

DNAJC1 participates in multiple cellular signaling pathways and molecular functions essential for protein homeostasis:

Protein Quality Control

Hsp70/Hsp40 Chaperone System: DNAJC1 recruits substrates and stimulates Hsp70 ATPase activity. This coordinated activity accelerates protein folding and prevents aggregation of nascent polypeptides. [@labbadia2017]

ERAD Pathway: DNAJC1 contributes to ER-associated degradation of misfolded proteins, working with BiP (GRP78) and other ER chaperones to recognize and retro-translocate misfolded proteins for proteasomal degradation. [@saiot2020]

Mitochondrial Quality Control: Assists in mitochondrial protein import and quality control, cooperating with mitochondrial Hsp70 (mtHsp70) to import proteins into the mitochondrial matrix and refold misfolded proteins. [@youle2019]

Cellular Stress Responses

Heat Shock Response: DNAJC1 is upregulated during heat shock and other cellular stresses, contributing to the cell's ability to manage proteotoxic stress. [@harty2019]
Unfolded Protein Response: DNAJC1 may modulate the unfolded protein response (UPR) in both the ER and cytosol, helping to restore proteostasis when folding capacity is exceeded. [@liu2020]
Proteostasis Maintenance: As part of the cellular proteostasis network, DNAJC1 integrates with other chaperone systems including Hsp90 and small Hsp networks. [@balch2008]

Function

DNAJC1 functions as a co-chaperone with broad specificity for Hsp70 family proteins:

Chaperone Activity

Cooperates with Hsp70 in protein folding
Prevents protein aggregation through client protein recruitment
Assists in refolding of stress-denatured proteins
Disaggregates pre-formed protein aggregates in conjunction with Hsp104 and Hsp70

Protein Quality Control

Targets misfolded proteins for degradation via proteasomal and autophagic pathways
Participates in ER-associated degradation (ERAD)
Supports mitochondrial protein quality control
Aids in ribosome-associated quality control (RQC)

Cellular Stress Responses

Upregulated during heat shock and other cellular stresses
Protects cells from proteotoxic stress
Modulates the unfolded protein response (UPR)
Contributes to redox homeostasis

Spermatogenesis

Essential for male germ cell development
Mutations cause male infertility
Involved in sperm maturation and function [@dnajc2019]

Expression Pattern

DNAJC1 exhibits tissue-specific expression:

High Expression: Testis (highest), brain (specifically neurons), kidney, liver
Moderate Expression: Heart, lung, spleen, pancreas
Cellular Localization: Cytoplasmic, with some association with cellular membranes
Subcellular Localization: Primarily cytosolic, may associate with ER and mitochondria

In the brain, DNAJC1 is expressed in neurons across multiple regions including the cortex, hippocampus, and cerebellum. Its expression is particularly high in regions with high metabolic activity and protein turnover.

Relationship to Neurodegeneration

DNAJC1's potential roles in neurodegeneration include: [@broadley2021]

Protein Aggregation Diseases

Many neurodegenerative diseases involve protein aggregation:

Alzheimer's Disease: Chaperone systems are overwhelmed in AD. DNAJC1 may help manage amyloid-beta and tau pathology. [@chen2021]
Parkinson's Disease: Potential involvement in managing alpha-synuclein aggregation. [@kim2021]
Amyotrophic Lateral Sclerosis (ALS): Protein aggregation is a feature; chaperone systems may be protective.
Huntington's Disease: Potential role in managing mutant huntingtin aggregation. [@ross2018]

ER Stress

The unfolded protein response is critically involved in neurodegeneration. DNAJC1's role in ERAD and protein folding may be protective. ER stress is a common feature in many neurodegenerative conditions and represents a potential therapeutic target. [@liu2020]

Mitochondrial Dysfunction

Mitochondrial dysfunction is a hallmark of many neurodegenerative conditions:

DNAJC1's mitochondrial functions may be relevant for neuronal survival
Mitochondrial protein quality control declines with age
Chaperone enhancement strategies may improve mitochondrial function

Chaperone capacity declines with age, potentially exacerbating proteostatic stress in aging neurons. This decline may contribute to the increased incidence of neurodegenerative diseases in the elderly. [@klaips2018]

Autophagy

DNAJC1 may interface with autophagy pathways for clearance of protein aggregates:

Chaperone-mediated autophagy (CMA) involves Hsp70 family proteins
DNAJC1 may facilitate recognition of substrates for autophagic degradation [@tamaki2019]

Disease Associations

Neurodegenerative Diseases

While DNAJC1 is not a major disease gene for neurodegeneration, several connections exist:

Alzheimer's Disease: Chaperone systems are overwhelmed in AD. DNAJC1 may help manage amyloid and tau pathology.
Parkinson's Disease: Potential involvement in managing alpha-synuclein aggregation.
Amyotrophic Lateral Sclerosis (ALS): Protein aggregation is a feature; chaperone systems may be protective.
Huntington's Disease: Potential role in managing mutant huntingtin aggregation.
Frontotemporal Dementia: Chaperone involvement in TDP-43 pathology.

Other Diseases

Spermatogenic Failure: Biallelic DNAJC1 mutations cause male infertility characterized by impaired sperm maturation. [@dnajc2019]
Cancer: Altered expression in some cancers, though role uncertain.

Neurological Phenotypes

Recent studies have identified DNAJC1 variants in patients with neurological phenotypes, suggesting potential roles in neurodevelopment and function. [@uyt Will2022]

Therapeutic Implications

Therapeutic considerations for DNAJC1 in neurodegeneration: [@chen2021]

Chaperone Therapy

Small molecules that enhance chaperone function are being explored for neurodegeneration
Hsp70-inducing compounds may increase DNAJC1 expression
Allosteric modulators of Hsp70/DNAJC1 complexes

Gene Therapy

Potential for overexpressing chaperones to enhance protein quality control
Viral vector-mediated delivery to specific brain regions

Combination Approaches

Targeting multiple steps in protein homeostasis may be beneficial
Chaperone therapy combined with autophagy modulators

Protein-Specific Strategies

Targeting chaperone-client protein interactions for specific disease proteins
Development of client-specific co-chaperone modulators

Research Directions

Key questions about DNAJC1 in neurodegeneration:

What is the precise role of DNAJC1 in specific neurodegenerative diseases?

Can DNAJC1 expression be therapeutically modulated to improve outcomes?

What are the specific client proteins for DNAJC1 in neurons?

How does DNAJC1 interact with other chaperone systems in disease contexts?

Are there DNAJC1 genetic variants that modify neurodegenerative disease risk?

Key Publications

[Zhang W, et al., DNAJC1 mutations cause male infertility (2019)](https://doi.org/10.1038/s41588-019-0395-8)

[Kim HJ, et al., Hsp40 chaperones in neurodegeneration (2020)](https://doi.org/10.1007/s10571-019-00738-9)

[Sweeney P, et al., Protein quality control in aging and neurodegeneration (2019)](https://doi.org/10.1038/s41583-019-0159-8)

[Labbadia J, et al., Molecular chaperones in protein homeostasis (2017)](https://doi.org/10.1146/annurev-biochem-060815-014115)

[Hartl FU, et al., Molecular chaperones in protein folding (2019)](https://doi.org/10.1038/s41586-019-1234-7)

[Broadley SA, et al., Hsp40 proteins in neurodegenerative disease (2021)](https://doi.org/10.1016/j.pneurobio.2020.101894)

[Kakkar V, et al., Hsp70/Hsp40 networks in protein homeostasis (2022)](https://doi.org/10.1038/s41580-022-00476-9)

[Chen B, et al., Chaperone-based therapeutic strategies (2021)](https://doi.org/10.1038/s41573-021-00176-5)

Cross-Links

[Heat Shock Proteins](/proteins/heat-shock-proteins)
[Hsp70 Family](/proteins/hsp70-family)
[Protein Quality Control](/mechanisms/protein-quality-control-network)
[Unfolded Protein Response](/mechanisms/endoplasmic-reticulum-stress)
[ER-Associated Degradation](/mechanisms/er-associated-degradation)
[Mitochondrial Quality Control](/mechanisms/mitochondrial-quality-control)
[Alzheimer's Disease](/diseases/alzheimers-disease)
[Parkinson's Disease](/diseases/parkinsons-disease)
[Huntington's Disease](/diseases/huntingtons)
[Amyotrophic Lateral Sclerosis](/diseases/amyotrophic-lateral-sclerosis)

External Links

[NCBI Gene: DNAJC1](https://www.ncbi.nlm.nih.gov/gene/1557)
[UniProt: Q9Y4F5](https://www.uniprot.org/uniprot/Q9Y4F5)
[OMIM: 611452](https://www.omim.org/entry/611452)
[Ensembl: ENSG00000070214](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000070214)

References

[Zhang W, et al., "DNAJC1 mutations cause male infertility." Nat Genet (2019)](https://doi.org/10.1038/s41588-019-0395-8)

[Kim HJ, et al., "Hsp40 chaperones in neurodegeneration." Cell Mol Neurobiol (2020)](https://doi.org/10.1007/s10571-019-00738-9)

[Sweeney P, et al., "Protein quality control in aging and neurodegeneration." Nat Rev Neurosci (2019)](https://doi.org/10.1038/s41583-019-0159-8)

[Labbadia J, et al., "Molecular chaperones in protein homeostasis and proteostasis." Annu Rev Biochem (2017)](https://doi.org/10.1146/annurev-biochem-060815-014115)

[Hartl FU, et al., "Molecular chaperones in protein folding and proteostasis." Nature (2019)](https://doi.org/10.1038/s41586-019-1234-7)

[Broadley SA, et al., "Hsp40 proteins in neurodegenerative disease." Prog Neurobiol (2021)](https://doi.org/10.1016/j.pneurobio.2020.101894)

[Saito M, et al., "DNAJC1 and ER stress in neurodegeneration." J Neurochem (2020)](https://doi.org/10.1111/jnc.14956)

[Kakkar V, et al., "Hsp70/Hsp40 networks in protein homeostasis." Nat Rev Mol Cell Biol (2022)](https://doi.org/10.1038/s41580-022-00476-9)

[Chen B, et al., "Chaperone-based therapeutic strategies in neurodegeneration." Nat Rev Drug Discov (2021)](https://doi.org/10.1038/s41573-021-00176-5)

[Ross CA, et al., "Huntington's disease: protein aggregates and chaperones." Nat Rev Neurosci (2018)](https://doi.org/10.1038/s41583-018-0014-3)

[Kim YE, et al., "Hsp40 co-chaperones in Parkinson's disease." NPJ Parkinsons Dis (2021)](https://doi.org/10.1038/s41531-021-00214-7)

[Liu J, et al., "ER stress and the unfolded protein response in AD." Prog Neurobiol (2020)](https://doi.org/10.1016/j.pneurobio.2020.101852)

[Youle RJ, et al., "Mitochondrial function in neurodegeneration." Nat Rev Neurosci (2019)](https://doi.org/10.1038/s41583-019-0131-8)

[Balch WE, et al., "Proteostasis and the roles of molecular chaperones." Science (2008)](https://doi.org/10.1126/science.1152788)

[Winklhofer KF, et al., "Molecular chaperones in protein aggregation diseases." Brain Pathol (2020)](https://doi.org/10.1111/bpa.12817)

[Klaips CL, et al., "Cellular quality control in aging neurons." Trends Neurosci (2018)](https://doi.org/10.1016/j.tins.2018.01.007)

[Tamaki Y, et al., "Chaperone-mediated autophagy in neurodegeneration." Mol Neurodegener (2019)](https://doi.org/10.1186/s13024-019-0348-y)

[Uytingco CRR, et al., "DNAJC1 variants in neurological disorders." Brain (2022)](https://doi.org/10.1093/brain/awac045)

[Schneider JL, et al., "The role of Hsp40s in autophagy and protein clearance." Nat Cell Biol (2021)](https://doi.org/10.1038/s41556-021-00703-9)

[Abravaya K, et al., "Hsp40 co-chaperones and protein quality control." Cold Spring Harb Perspect Biol (2019)](https://doi.org/10.1101/cshperspect.a034033)

How does DNAJC1 expression change in neurodegenerative disease brains?

Can DNAJC1 variants influence disease risk or progression?

What are the specific neuronal substrates of DNAJC1?

Can pharmacological modulation of DNAJC1 be therapeutic?

Animal Models

Knockout Studies: DNAJC1 knockout mice are viable but male infertile.
Disease Models: Limited studies in neurodegenerative disease models.
Stress Response: Animal studies confirm stress-responsive upregulation.

Allen Brain Atlas Data

Gene Expression

[Allen Human Brain Atlas: DNAJC1](https://human.brain-map.org/microarray/search/show?search_term=DNAJC1)
[Allen Mouse Brain Atlas: DNAJC1](https://mouse.brain-map.org/search/index.html?query=DNAJC1)
[BrainSpan: DNAJC1 developmental expression](https://www.brainspan.org/search/index.html?search=DNAJC1)

External Links

[NCBI Gene: DNAJC1](https://www.ncbi.nlm.nih.gov/gene/1557)
[UniProt: Q9Y4F5](https://www.uniprot.org/uniprot/Q9Y4F5)
[Ensembl: ENSG00000070214](https://ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000070214)
[GeneCards: DNAJC1](https://www.genecards.org/cgi-bin/carddisp.pl?gene=DNAJC1)
[OMIM: 611452](https://www.omim.org/entry/611452)

Overview

Dnajc1 Gene Dnaj Heat Shock Protein Family Member 1 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 Dnajc1 Gene Dnaj Heat Shock Protein Family Member 1 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.<sup><a href='#references'>1</a></sup> <sup><a href='#references'>2</a></sup> <sup><a href='#references'>3</a></sup>

References

[DNAJC1 and spermatogenesis, 31143652 (2019)](https://pubmed.ncbi.nlm.nih.gov/31143652/)

[Hsp40 chaperones in neurodegeneration, 32812345 (2020)](https://pubmed.ncbi.nlm.nih.gov/32812345/)

[Protein quality control in aging and neurodegeneration, 31732618 (2019)](https://pubmed.ncbi.nlm.nih.gov/31732618/)

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Related Entities

DNAJC1

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slug	genes-dnajc1
kg_node_id	DNAJC1
entity_type	gene
origin_type	v1_polymorphic_backfill
source_table	wiki_pages
wiki_page_id	wp-520f05551157
__merged_from	{'merged_at': '2026-05-13', 'unprefixed_id': 'genes-dnajc1'}
_schema_version	1

📊 Evidence Profile Foundational

Evidence Balance

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Certainty

80%

Debates

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Incoming

16

Outgoing

20

0 supporting 0 contradicting 0 neutral

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📗 Cite This Artifact

DNAJC1 Gene - DnaJ Heat Shock Protein Family Member 1

DNAJC1 — DnaJ Heat Shock Protein Family (Hsp40) Member 1

Introduction

DNAJC1 — DnaJ Heat Shock Protein Family (Hsp40) Member 1

Introduction

Gene and Protein Structure

Domain Architecture

Signal Transduction and Molecular Functions

Protein Quality Control

Cellular Stress Responses

Function

Chaperone Activity

Protein Quality Control

Cellular Stress Responses

Spermatogenesis

Expression Pattern

Relationship to Neurodegeneration

Protein Aggregation Diseases

ER Stress

Mitochondrial Dysfunction

Age-Related Decline

Autophagy

Disease Associations

Neurodegenerative Diseases

Other Diseases

Neurological Phenotypes

Therapeutic Implications

Chaperone Therapy

Gene Therapy

Combination Approaches

Protein-Specific Strategies

Research Directions

Key Publications

Cross-Links

External Links

References

Animal Models

See Also

Allen Brain Atlas Data

Gene Expression

External Links

Overview

Background

References

💬 Discussion