| 2020 |
DNM2 mediates scission of recycling endosome tubules to release nascent autophagosome precursors; this process is regulated by DNM2 binding to LC3 and is increased by autophagy-inducing stimuli. The CNM-causing DNM2-R465W mutant is defective in this scission step because it shows increased binding to the plasma membrane partner ITSN1, depleting normal DNM2 from autophagosome formation sites on recycling endosomes. |
Cell imaging, autophagy flux assays, co-immunoprecipitation of DNM2 with LC3 and ITSN1, expression of CNM mutant DNM2 in cells |
Developmental cell |
High |
32315611
|
| 2010 |
DNM2 directly interacts with the adaptor protein CIN85 (SH3-domain-containing protein of 85 kDa) in a complex that is induced by EGF receptor stimulation. This DNM2-CIN85 interaction occurs at late endosomes and is required for late endosomal budding/scission; disruption of this interaction results in accumulation of internalized EGFR in aberrantly elongated late endosomal tubules and sustained downstream signaling. |
Co-immunoprecipitation, dominant-negative and knockdown experiments, live-cell and fluorescence imaging of late endosome morphology, EGFR trafficking assay |
The EMBO journal |
High |
20711168
|
| 2013 |
Expression of the CNM-causing DNM2-S619L mutation in zebrafish leads to accumulation of aberrant vesicular structures and defective excitation-contraction coupling; in COS7 cells, DNM2-S619L causes defective BIN1-dependent membrane tubule formation, indicating the mutation impairs membrane tubulation. |
Zebrafish transgenic expression, COS7 cell tubulation assay, electron microscopy, calcium imaging |
Disease models & mechanisms |
Medium |
24135484
|
| 2017 |
DNM2 interacts with the scaffold protein AHI-1 via the AHI-1 SH3 domain binding to the DNM2 proline-rich domain, forming an AHI-1–BCR-ABL–DNM2 protein complex in CML stem/progenitor cells that regulates leukemic cell survival and TKI resistance through cellular endocytosis and ROS-mediated autophagy. |
Co-immunoprecipitation, domain-mapping experiments (SH3 and proline-rich domain truncations), DNM2 knockdown with survival/apoptosis assays |
Leukemia |
Medium |
28366933
|
| 2017 |
HSV-1 neuronal infection triggers Src tyrosine kinase activation and subsequent phosphorylation of Dynamin 2 (DNM2), leading to fragmentation and scattering of the Golgi apparatus; pharmacological inhibition of Src kinase (PP2) markedly reduces these Golgi morphological alterations. HSV-1 tegument protein VP11/12 is necessary but not sufficient for Dyn2 phosphorylation. |
Immunofluorescence, transmission electron microscopy, pharmacological Src inhibition (PP2), primary neuronal cultures, Western blot for phospho-DNM2 |
Frontiers in cellular and infection microbiology |
Medium |
28879169
|
| 2019 |
In transgenic zebrafish, wild-type DNM2 shows distinctive subcellular compartmentalization in muscle in vivo; CNM-related DNM2 mutations cause protein mislocalization and aggregation in muscle, whereas wild-type DNM2 does not aggregate. |
Transgenic zebrafish live imaging, subcellular localization analysis, motor function assays, muscle ultrastructure analysis |
Human molecular genetics |
Medium |
31691805
|
| 2013 |
A novel DNM2 D614N mutation in the PH domain is associated with profound mislocalization of DNM2 and membrane trafficking proteins (concentrated at centrally located nuclei rather than normal distribution) in patient muscle fibers, without significant change in total DNM2 protein level, causally linking PH domain integrity to proper DNM2 subcellular localization and myofiber organization. |
Immunofluorescence of patient muscle biopsy, protein expression analysis, genetic analysis of family members |
Neuromuscular disorders : NMD |
Low |
23374900
|
| 2017 |
Genetic reduction of DNM2 (via antisense oligonucleotides) in Mtm1 knockout mice (a model of X-linked centronuclear myopathy) efficiently reduces DNM2 protein in muscle and prevents myopathy development; ASO injection into severely affected mice reverses muscle pathology within 2 weeks, establishing that elevated DNM2 is a pathogenic driver downstream of MTM1 loss. |
Antisense oligonucleotide (ASO) systemic delivery in Mtm1KO mice, histopathology, muscle force measurements, Western blot |
Nature communications |
High |
28589938
|
| 2018 |
Reduction of DNM2 via AAV-shRNA or antisense oligonucleotides in Dnm2-R465W/+ knock-in mice (DNM2-related CNM model) rescues muscle mass, fiber size, histopathology, and ultrastructure, demonstrating that reducing both WT and mutant DNM2 alleles can correct a dominant gain-of-function myopathy. |
Intramuscular AAV-shRNA injection, systemic ASO delivery, histopathology, muscle force/mass measurements, Western blot |
Proceedings of the National Academy of Sciences of the United States of America |
High |
30291191
|
| 2019 |
Allele-specific CRISPR/Cas9 inactivation or correction of the heterozygous DNM2-R465W mutation in patient fibroblasts and mouse myoblasts rescues altered transferrin uptake (endocytosis) and autophagy phenotypes, confirming the R465W mutation causes gain-of-function defects in these two DNM2-dependent cellular processes. |
CRISPR/Cas9 allele-specific editing, transferrin uptake assay, autophagy flux assay in patient and mouse cells |
Molecular therapy. Nucleic acids |
Medium |
30925452
|
| 2025 |
BIN1 (amphiphysin 2) inhibits the GTPase activity of DNM2; genetic reduction of BIN1 in Dnm2-K562E/+ CMT mice increases the activity of the K562E DNM2 mutant, restores motor performance, ameliorates muscle and nerve structural defects, and normalizes integrin localization in muscle. Conversely, increasing BIN1 exacerbates Dnm2-K562E/+ phenotypes, establishing BIN1 as a modifier of DNM2 activity and disease severity. |
In vitro GTPase activity assay with BIN1, genetic epistasis (Dnm2K562E/+ × Bin1+/- mice), motor and histological phenotyping, integrin immunofluorescence |
Proceedings of the National Academy of Sciences of the United States of America |
High |
40042903
|
| 2026 |
DNM2 lipid binding (via PH domain) is the specific molecular function driving CNM pathology: a lipid-binding-defective K562E mutant of DNM2, when expressed in Mtm1-/y mice, fully rescues survival, motor function, muscle force, fiber size, and organelle positioning despite persistently elevated DNM2 protein levels, while GTPase-active or other mutants fail to rescue. This establishes DNM2 lipid binding, not protein level or GTPase activity per se, as the pathogenic driver in MTM1-CNM. |
AAV-mediated delivery of WT and DNM2 mutants in WT and Mtm1-/y mice, muscle force measurements, histopathology, fiber sizing, organelle positioning; genetic epistasis (Mtm1-/y Dnm2K562E/+ mice) |
JCI insight |
High |
42100875
|
| 2016 |
DNM2 (dynamin 2) is required for efficient Japanese encephalitis virus (JEV) replication; siRNA knockdown of DNM2 in PK15 cells significantly reduces JEV replication, identifying DNM2-dependent vesicle scission as a host factor exploited by JEV for cellular entry/replication. |
siRNA knockdown of DNM2, viral replication assay (JEV), miR-124 overexpression with DNM2 target validation |
Virology journal |
Low |
27329300
|
| 2023 |
Tamoxifen reduces the abnormally elevated DNM2 protein level in both BIN1-CNM and DNM2-CNM mouse models through a mechanism involving normalization of cullin 3 (E3 ubiquitin ligase) protein level, suggesting ubiquitin-proteasome-mediated regulation of DNM2 abundance underlies the therapeutic effect. |
Tamoxifen dietary treatment in CNM mouse models, Western blot for DNM2 and ubiquitin-proteasome markers (cullin 3, p62), transcriptome analysis, muscle contractility measurements |
Brain : a journal of neurology |
Medium |
36562127
|
| 2024 |
DNM2 interacts with Drp1 via its GTPase domain, enabling mitochondrial translocation and facilitating the terminal steps of mitochondrial fission; silencing DNM2 in pulmonary arterial smooth muscle cells inhibits mitochondrial fission and causes G1/G0 cell cycle arrest, while DNM2 overexpression accelerates fission and proliferation. RGCC is identified as a downstream cell-cycle effector of this DNM2-Drp1 axis. |
Co-immunoprecipitation, super-resolution microscopy for colocalization at fission sites, truncated-domain expression constructs, RNA-seq after DNM2 silencing, flow cytometry for cell cycle, siRNA knockdown |
bioRxivpreprint |
Medium |
bio_10.1101_2024.12.05.24318153
|
| 2024 |
DNM2 is recruited to the neck of vacuole-like protrusions (VLPs) formed during Shigella flexneri cell-to-cell spread, dependent on PIK3C3-mediated PtdIns(3)P accumulation, where it mediates membrane scission to resolve protrusions into double-membrane vacuoles. |
Live-fluorescence confocal microscopy tracking, PIK3C3 inhibition, DNM2 localization imaging at VLP necks during bacterial spread |
bioRxivpreprint |
Low |
bio_10.1101_2024.10.31.621244
|
| 2021 |
Novel DNM2 variants associated with CNM induce gain-of-function phenotypes in a cell-based imaging assay (T-tubule-like structure formation); the degree of impairment in cellulo correlates with biochemical gain-of-function GTPase activity measurements and clinical disease severity, providing evidence that DNM2 CNM mutations act via hyperactivity. |
In cellulo imaging assay for T-tubule-like structures, biochemical GTPase activity assay for mutant proteins |
Human mutation |
Medium |
34837441
|
| 2026 |
Muscle-specific DNM2 overexpression in Dnm2-K562E/+ CMT mice ameliorates desmin and integrin mislocalization, membrane trafficking defects, mitochondrial abnormalities, and fibrosis in skeletal muscle independently of nerve involvement. Systemic postnatal AAV-DNM2 delivery paradoxically worsened muscle pathology producing CNM-like features, revealing that precise DNM2 dosage is critical and that the therapeutic window for DNM2 augmentation in muscle is narrow. |
Tissue-specific transgenic overexpression, AAV systemic delivery, histopathology, immunofluorescence for desmin/integrin, electron microscopy for mitochondria |
International journal of molecular sciences |
Medium |
41683892
|