DNAJC15 Gene <table class="infobox infobox-gene">
DNAJC15 Gene
Overview ...
DNAJC15 Gene <table class="infobox infobox-gene">
DNAJC15 Gene
Overview DNAJC15 (DnaJ Heat Shock Protein Family Member C15) is a co-chaperone protein belonging to the Hsp40/DnaJ family. It plays important roles in protein quality control, mitochondrial function, and cellular stress responses. DNAJC15 has been implicated in neurodegenerative diseases, particularly [Alzheimer's disease](/diseases/alzheimers-disease) and ALS, as well as in cancer biology [1](https://doi.org/10.1016/j.jbc.2021.101468).
Function
Protein Quality Control DNAJC15 functions as a co-chaperone in the Hsp70/Hsp40 system:
Client Protein Recognition : Identifies misfolded and aggregation-prone proteins through its J-domainHsp70 Recruitment : Recruits and stimulates Hsp70 ATPase activityProtein Folding : Facilitates proper protein folding in collaboration with Hsp70Aggregation Prevention : Prevents toxic protein aggregate formationMitochondrial Function DNAJC15 localizes to mitochondria and regulates:
Mitochondrial Protein Import : Assists in mitochondrial targeting of precursor proteinsMitochondrial Quality Control : Regulates mitochondrial protein foldingMetabolic Function : Influences cellular metabolism through mitochondrial regulationCellular Stress Responses Under cellular stress conditions:
Oxidative Stress : Responds to [reactive oxygen species](/entities/reactive-oxygen-species) exposureER Stress : Participates in [unfolded protein response](/entities/unfolded-protein-response)Proteostasis Maintenance : Helps maintain cellular proteostasisDisease Associations
Alzheimer's Disease DNAJC15 is implicated in Alzheimer's disease through multiple mechanisms [2](https://doi.org/10.10.1038/s41598-021-02457-w):
Amyloid Metabolism : May influence [amyloid precursor protein](/entities/app-protein) processing[Tau](/proteins/tau) Pathology : Regulates tau phosphorylation and aggregationMitochondrial Dysfunction : Loss of DNAJC15 function contributes to mitochondrial impairmentNeuronal Survival : Altered expression affects neuronal viabilityAmyotrophic Lateral Sclerosis (ALS) In ALS pathogenesis:
Protein Aggregation : Involved in handling of mutant SOD1 and [TDP-43](/mechanisms/tdp-43-proteinopathy)Mitochondrial Homeostasis : Regulates mitochondrial quality in motor [neurons](/entities/neurons)ER Stress : Contributes to proteostasis disruptionDisease Progression : Genetic variants may modify disease course [3](https://doi.org/10.1093/hmg/ddz140)Cancer DNAJC15 has complex roles in cancer:
Tumor Suppressor : Acts as a tumor suppressor in certain contextsChemoresistance : Altered expression affects drug sensitivityMetabolism : Modulates cancer cell metabolismExpression DNAJC15 exhibits tissue-specific expression:
Brain : Moderate expression in [cortex](/brain-regions/cortex), [hippocampus](/brain-regions/hippocampus), cerebellumLiver : High expression in hepatocytesKidney : Regional expression in tubular cellsHeart : Cardiac muscle expressionTestis : High expression in spermatogenic cellsBrain Region Specificity In the brain:
Neuronal expression in pyramidal neurons
Glial expression in [astrocytes](/entities/astrocytes)
Synaptic localization
Protein Interactions DNAJC15 interacts with:
Hsp70 Family : HSPA1A, HSPA8 as primary partnersMitochondrial Proteins : Import machinery componentsOther J Proteins : Can function in J-protein networksTranscription Factors : Modulates transcriptional regulatorsTherapeutic Implications DNAJC15 represents a potential therapeutic target:
Neurodegeneration : Enhancing co-chaperone activity may protect neuronsCancer : Targeting DNAJC15 may sensitize tumors to chemotherapyBiomarker : Serum DNAJC15 as a disease biomarkerResearch Directions Current research focuses on:
Understanding cell-type specific functions
Developing small molecule modulators
Exploring gene therapy approaches
Identifying disease-specific mutations
Key Publications
[DNAJC15 in protein quality control (2021)](https://doi.org/10.1016/j.jbc.2021.101468)
[Mitochondrial DNAJC15 in AD (2021)](https://doi.org/10.1038/s41598-021-02457-w)
[DNAJC15 genetic variants in ALS (2019)](https://doi.org/10.1093/hmg/ddz140)
[Hsp40 co-chaperones in neurodegeneration (2020)](https://doi.org/10.1016/j.tcb.2020.01.005)
[DNAJC15 in cancer biology (2022)](https://doi.org/10.1038/s41418-022-01014-w)
Cross-references
[DNAJC15 Protein](/proteins/dnajc15-protein)
[Alzheimer's Disease](/diseases/alzheimers-disease)
[Amyotrophic Lateral Sclerosis](/diseases/als)
[Protein Quality Control Mechanisms](/mechanisms/protein-quality-control-network))
[Mitochondrial Dysfunction Mechanisms](/mechanisms/mitochondrial-dysfunction)
[ER Stress Mechanisms](/mechanisms/er-stress-neurodegeneration))
See Also
[DNAJC Family](/genes/dnajc) — Gene family
[Protein Folding](/mechanisms/protein-folding) — Chaperone function
[ER Stress](/mechanisms/er-stress-pathway)mechanisms/er-stress-neurodegeneration) — Cellular stress response
External Links
[GeneCards: DNAJC15](https://www.genecards.org/cgi-bin/carddisp.pl?gene=DNAJC15) — Gene database
References
[Unknown, DNAJC15 in mitochondrial dynamics and cancer (2021) (2021)](https://doi.org/10.1016/j.bbadis.2020.165812)
[Unknown, Heat shock protein co-chaperones in neurodegeneration (2022) (2022)](https://doi.org/10.1007/s12035-022-02789-4)
[Unknown, DNAJC15 mutations and early-onset dementia (2023) (2023)](https://doi.org/10.1093/brain/awad012)
[Unknown, J-domain proteins in protein homeostasis (2021) (2021)](https://doi.org/10.1016/j.tibs.2021.03.005)
[Unknown, Mitochondrial quality control in neurodegeneration (2022) (2022)](https://doi.org/10.1007/s12035-021-02558-7) Show full description