| 2001 |
RME-8 (DNAJC13 ortholog in C. elegans) is required for receptor-mediated and fluid-phase endocytosis; it localizes to the limiting membrane of large endosomes and functions in endosomal trafficking prior to the lysosome, as demonstrated by loss-of-function mutants that fail to accumulate endocytosis markers in coelomocytes. |
Genetic analysis of C. elegans mutants, fluorescence localization, endocytosis marker uptake assays |
Molecular biology of the cell |
High |
11451999
|
| 2004 |
Drosophila Rme-8 interacts specifically with Hsc70-4 via its J-domain (biochemical and genetic interaction), and is required for clathrin-dependent endocytosis; rme-8 mutants phenocopy Hsc70-4 mutants, placing them in a common pathway. |
Drosophila genetic screen (dominant-negative dynamin interaction), biochemical pulldown, genetic epistasis, endocytosis tracer uptake assays |
The Journal of cell biology |
High |
15051737
|
| 2005 |
Mammalian RME-8 (DNAJC13) was identified in clathrin-coated vesicle proteomics from rat liver; affinity selection assays identify Hsc70 as its major binding partner via the DnaJ domain; RME-8 is tightly associated with microsomal membranes and co-localizes with endosomal markers. siRNA knockdown does not affect transferrin endocytosis but reduces EGF internalization and disrupts trafficking of cation-independent mannose 6-phosphate receptor and cathepsin D sorting. |
Proteomic analysis of clathrin-coated vesicles, affinity selection (pulldown), subcellular fractionation, co-localization, siRNA knockdown with cargo trafficking readouts |
The Journal of biological chemistry |
High |
16179350
|
| 2008 |
Human RME-8 (DNAJC13) is a peripheral membrane protein associated via its N-terminal region, localizing primarily to early endosomes (co-localizes with early endosomal markers, confirmed by immunoelectron microscopy). Expression of C-terminally truncated mutants perturbs transferrin recycling and EGF degradation through early endosomes. It does not co-localize with late endosomal markers. |
Cloning and biochemical characterization, immunoelectron microscopy, dominant-active Rab co-localization, truncation mutant overexpression, endocytic pathway assays |
Cell structure and function |
High |
18256511
|
| 2008 |
RME-8 depletion leads to increased EGFR degradation (decreased steady-state EGFR levels at both surface and intracellular pools), implicating DNAJC13 in sorting decisions at endosomes that protect EGFR from degradation; transferrin receptor levels are unaffected. |
siRNA knockdown, receptor level quantification, degradation rate assays |
FEBS letters |
Medium |
18307993
|
| 2009 |
C. elegans RME-8 associates with retromer component SNX-1; loss of SNX-1, RME-8, or the clathrin chaperone Hsc70/HSP-1 leads to over-accumulation of endosomal clathrin, reduced clathrin dynamics, and missorting of MIG-14/Wntless to the lysosome instead of the Golgi. This defines a mechanism whereby retromer regulates endosomal clathrin dynamics through RME-8 and Hsc70. |
Co-immunoprecipitation, genetic epistasis in C. elegans, live fluorescence imaging of clathrin dynamics, cargo missorting assays |
The EMBO journal |
High |
19763082
|
| 2013 |
The DNAJC13 p.Asn855Ser mutation segregates with autosomal dominant Parkinson's disease; cellular analysis shows this mutation confers a toxic gain-of-function and impairs endosomal transport. DNAJC13 immunoreactivity was detected within Lewy body inclusions. |
Exome sequencing, Sanger sequencing, case-control genotyping, cellular functional analysis, immunohistochemistry |
Human molecular genetics |
Medium |
24218364
|
| 2014 |
RME-8 (DNAJC13) interacts with FAM21 (a subunit of the WASH complex) and with SNX1; loss of RME-8 causes altered kinetics of SNX1 membrane association and a pronounced increase in highly branched endosomal tubules containing WASH-complex-dependent cargo, indicating that RME-8 coordinates WASH complex activity with the membrane-tubulating function of sorting nexins. |
Co-immunoprecipitation, siRNA knockdown, live fluorescence imaging of endosomal tubules, cargo localization assays |
Journal of cell science |
High |
24643499
|
| 2015 |
In Drosophila, Rme-8 depletion causes Notch receptor accumulation in enlarged tubulated Rab4-positive endosomes and impairs Notch signaling. Simultaneous depletion of retromer component Vps26 or ESCRT-0 components Hrs/Stam with Rme-8 causes ectopic Notch activation, placing Rme-8 upstream and in opposition to these complexes in regulating Notch recycling versus degradation. |
Drosophila genetic epistasis (double knockdown/mutants), live and fixed fluorescence imaging, Notch signaling readouts |
The Journal of cell biology |
High |
26169355
|
| 2017 |
SNX-1 and RME-8 together oppose the assembly of ESCRT-0/HGRS-1 degradative microdomains on endosomes; loss of snx-1 or rme-8 (but not other retromer components snx-3 or vps-35) increases endosomal coverage and intensity of HGRS-1-labeled microdomains and increases membrane-bound HGRS-1. Loss of hgrs-1 has little to no effect on SNX-1/RME-8 microdomains, indicating directionality of the interaction. The antagonism between recycling (RME-8/SNX-1) and degradative (ESCRT-0) microdomains is conserved in human HeLa cells. |
C. elegans genetics with in vivo fluorescence imaging of endosomal microdomains, siRNA knockdown in HeLa cells, membrane fractionation |
Proceedings of the National Academy of Sciences of the United States of America |
High |
28053230
|
| 2018 |
The PD-linked N855S mutant DNAJC13 causes α-synuclein accumulation in the endosomal compartment due to defective cargo trafficking from early to late/recycling endosomes. In human αSYN transgenic Drosophila, mutant DNAJC13 increases insoluble αSYN, induces dopaminergic neurodegeneration, rough eye phenotype, and age-dependent locomotor impairment. |
Cell-based trafficking assays, Drosophila in vivo model with behavioral and pathological readouts, biochemical fractionation |
Human molecular genetics |
Medium |
29309590
|
| 2019 |
The DNAJC13 p.Asn855Ser knock-in mutation in primary cortical neurons (from a mouse knock-in model) significantly increases SNX1-enriched endosomal tubule formation without affecting SNX1 puncta density or WASH-retromer assembly, indicating a dominant-negative gain-of-function that disrupts SNX1 membrane-tubulation dynamics. |
Knock-in mouse model, primary cortical neuron cultures, fluorescence imaging of SNX1 tubules, quantitative morphometry |
Neuroscience letters |
Medium |
31082451
|
| 2020 |
DNAJC13 acts as a positive modulator of autophagy; knockdown reduces autophagic flux in C. elegans and human cell lines and impairs ATG9A trafficking from the recycling endosome, reducing ATG9A co-localization at LC3B-positive autophagic puncta. The PD-associated N855S mutant fails to enhance autophagy upon overexpression. |
siRNA knockdown and overexpression in human cells, C. elegans RNAi, ATG9A localization by fluorescence microscopy, autophagic flux assays (LC3B puncta, autophagy markers) |
Cellular and molecular life sciences : CMLS |
Medium |
32322926
|
| 2022 |
Structure-function analysis of C. elegans RME-8 identified that: (1) the C-terminus is important for microdomain localization and substrate binding; (2) N-terminal sequences beyond the PH-like domain are important for endosome recruitment; (3) IWN4 and IWN3 domains are important for autoinhibitory DNAJ domain binding, with IWN3 playing a critical role in HRS/HGRS-1 uncoating activity. AlphaFold structural modeling combined with in vivo mutation analysis supports a model whereby SNX-1 and IWN domains control RME-8 conformation and productive exposure of its DNAJ domain, with SNX-1 acting as an activator and target of RME-8 uncoating activity. |
Random and site-directed mutagenesis, AlphaFold structural modeling, in vivo C. elegans fluorescence imaging of endosomal microdomains, phylogenetic analysis |
PLoS genetics |
Medium |
36279308
|
| 2023 |
Loss of RME-8/DNAJC13 in C. elegans mechanosensory neurons and primary mouse cortical neurons causes accumulation of grossly elongated autolysosomal tubules, indicating a role in autophagic lysosome reformation (ALR). In C. elegans, this phenotype is shared with bec-1/beclin, vps-15/PIK3R4, and dyn-1/dynamin mutants (known ALR regulators). Loss of RME-8 causes severe depletion of clathrin from neuronal autolysosomes, phenocopying bec-1 and vps-15 mutants. Loss of RME-8/DNAJC13 also reduces autophagic flux in both systems. |
C. elegans genetics and live fluorescence imaging, primary mouse cortical neuron culture, autophagic flux assays, clathrin localization |
Autophagy |
High |
37942902
|
| 2024 |
Genome-wide CRISPR interference screen identified DNAJC13 as a regulator of δ-opioid receptor (DOR) trafficking through the endosomal-lysosomal pathway; DNAJC13 controls trafficking of multiple GPCRs and regulates the composition of the endosomal proteome and endosomal homeostasis. |
Genome-wide CRISPRi screen using GPCR-APEX2/AUR trafficking biosensor, validation by loss-of-function with multiple GPCR trafficking readouts, quantitative proteomics of endosomal compartment |
Nature chemical biology |
High |
39223388
|
| 2025 |
DNAJC13 localizes to endosomes through its N-terminal PH-like domain binding to PI(3)P; the J domain (HPD catalytic triad) and a conserved YLT motif in the disordered C-terminus act as negative regulators of this localization. Mutation of either motif enhances endosomal localization and PI(3)P binding in vitro. The PH-like domain binds PI(3)P weakly in isolation and requires oligomerization for efficient PI(3)P binding and endosomal localization. Overexpression of derepressed mutants causes endosomal clustering and loss of membrane protein cargo recycling. |
Structure-function mutagenesis, PI(3)P binding assays in vitro, quantitative cell imaging, overexpression phenotypic analysis, quantitative proteomics |
Molecular biology of the cell |
High |
40737286
|
| 2025 |
The DNAJC13 N855S variant is less stable than wild-type protein and shows accelerated degradation. It fails to rescue impaired autophagy in DNAJC13 knockdown cells (loss-of-function), exerts a dominant-negative effect on cation-independent mannose-6-phosphate receptor distribution (without affecting overall cathepsin D levels or activity), and chronic DNAJC13 knockdown reduces expression of autophagy induction and biogenesis genes. |
Stable knockdown cell lines, transient N855S mutant expression, biochemical stability assays, co-localization by fluorescence microscopy, cathepsin D activity assays, gene expression analysis |
Journal of cellular physiology |
Medium |
40717240
|