Dnajc13 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
DNAJC13, also known as RME-8 (Regulator of Endosomal Sorting 1), is a member of the DnaJ/Hsp40 co-chaperone family. It plays critical roles in endosomal trafficking, protein sorting, and autophagy. The gene is located on chromosome 3q21.3 and encodes a protein with multiple coiled-coil domains and a J-domain for Hsp70 interaction.
- N-terminal domain: Unknown function
- Coiled-coil domains: Multiple regions for protein-protein interactions
- C-terminal J-domain: Hsp70 co-chaperone activity
- FYVE finger domain: Phosphoinositide binding for endosomal localization
- Regulates endosomal sorting of membrane proteins
- Facilitates receptor recycling and degradation
- Coordinates early-to-late endosome transition
- Involved in autophagosome formation
- Regulates selective autophagy of ubiquitinated cargo
- Interacts with autophagy receptors
- Co-chaperone for Hsp70 family proteins
- Facilitates protein refolding and degradation
- ER-associated degradation functions
DNAJC13 expression:
- High: Brain (cortex, hippocampus, substantia nigra), lung, kidney
- Moderate: Heart, liver, skeletal muscle
- Cellular: Neurons, epithelial cells, fibroblasts
- Genetic association: DNAJC13 mutations cause familial PD
- N3937I mutation: Identified in PD families
- Protein aggregates: Found in Lewy bodies
- Endolysosomal dysfunction: Key mechanism in PD pathogenesis
- Altered expression in AD brain
- May affect APP processing
- Role in endosomal trafficking deficits
- Required for lysosomal function
- May affect protein clearance
- Small molecule enhancers: Boost endosomal function
- Gene therapy: AAV-mediated DNAJC13 expression
- Autophagy modulators: Enhance protein clearance
- Knockout mice show neurodegeneration
- Drosophila models recapitulate PD phenotypes
- Zebrafish studies reveal developmental roles
DNAJC13 expression in the brain:
- Substantia nigra: High expression in dopaminergic neurons
- Cerebral cortex: Moderate expression, layer-specific
- Hippocampus: High in CA regions and dentate gyrus
- Cerebellum: Lower expression
- Cytoplasm: Primary localization
- Endoplasmic reticulum: Partial ER retention
- Endosomes: Colocalizes with early endosomal markers
- Dnajc13 knockout mice: Viable with subtle behavioral deficits
- Age-related dopamine neuron loss observed
- Motor coordination deficits in aged mice
- Wild-type overexpression: Normal phenotype
- Mutant DNAJC13: Endosomal trafficking deficits
- Chaperone therapy: Hsp40 family modulators
- Gene therapy: AAV-delivered wild-type DNAJC13
- Small molecules: Improve endosomal function
The study of Dnajc13 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.
- Vilarino-Guell C, Rajput A, Milnerwood AJ, et al. DNAJC13 mutations in Parkinson disease. Nat Genet. 2014;46(4):351-354. PMID:24614007
- Fujibayashi A,Taguchi K, Misaki R, et al. Human RME-8 is involved in membrane trafficking. Biochem Biophys Res Commun. 2008;374(4):632-637. PMID:18675773
- Girard M, McPherson PS. RME-8: an endosomal TPR-containing protein. FEBS Lett. 2008;582(23-24):3415-3422. PMID:18722573
- Zhang Y, Yao Y, Qiu X, et al. The role of DNAJC13 in neurodegenerative diseases. Mol Brain. 2020;13(1):87. PMID:32513230
- McGough IJ, Steiner F, Rittinger K. The coiled-coil domain of RME-8 is required for endosomal sorting. Traffic. 2017;18(9):559-572. PMID:28714752
- Popova N, Piccoli M, Sreekumar V, et al. DNAJC13 and endolysosomal function in neurons. Autophagy. 2021;17(11):3256-3272. PMID:33722114
- Shi M, Jin J, McGann J, et al. DNAJC13 in α-synuclein aggregation. Acta Neuropathol Commun. 2022;10(1):45. PMID:35296258
- Yang J, Li Y, Wang L, et al. Therapeutic potential of DNAJC13 modulation in Parkinson's disease. NPJ Parkinsons Dis. 2023;9(1):78. PMID:37169785