Dynamin 1 Protein (Dnm1) is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Brain Atlas Resources
The [Allen Brain Atlas](https://human.brain-map.org/microarray/search/show?search_term=DNM1) provides gene expression data for DNM1:
Human Brain Expression: Searchable expression data across brain regions
Cell Type Specificity: Expression patterns in different neuronal populations
Dynamin-1 (DNM1) is a large GTPase essential for synaptic vesicle endocytosis. It is one of three dynamin isoforms in mammals and is predominantly expressed in [neurons](/entities/neurons), where it mediates the final scission of synaptic vesicles from the plasma membrane. [@ferguson2007]
Dynamin 1 Protein (Dnm1) is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
Brain Atlas Resources
The [Allen Brain Atlas](https://human.brain-map.org/microarray/search/show?search_term=DNM1) provides gene expression data for DNM1:
Human Brain Expression: Searchable expression data across brain regions
Cell Type Specificity: Expression patterns in different neuronal populations
Dynamin-1 (DNM1) is a large GTPase essential for synaptic vesicle endocytosis. It is one of three dynamin isoforms in mammals and is predominantly expressed in [neurons](/entities/neurons), where it mediates the final scission of synaptic vesicles from the plasma membrane. [@ferguson2007]
Overview
Mermaid diagram (expand to render)
Dynamin-1 is a GTPase protein critical for synaptic vesicle endocytosis in neurons. It is one of three dynamin isoforms (dynamin-1, dynamin-2, dynamin-3) and is predominantly expressed in neuronal tissue. Dynamin-1 mediates the pinching off of synaptic vesicles from the presynaptic membrane during clathrin-mediated endocytosis, a essential step for synaptic vesicle recycling and neurotransmitter release. Mutations in the DNM1 gene have been linked to early-onset epileptic encephalopathies and developmental disorders. In neurodegenerative diseases, dynamin-1 function can be impaired by pathogenic proteins. [@raimondi2011]
Structure and Function
Dynamin-1 is a ~100 kDa GTPase with a modular structure:
GTPase domain: N-terminal domain that hydrolyzes GTP to drive membrane fission
Middle domain: Mediates dimerization and oligomerization
Pleckstrin homology (PH) domain: Binds phosphatidylinositol 4,5-bisphosphate (PIP2) at the neck of clathrin-coated vesicles
GTPase effector domain (GED): Stimulates GTPase activity; functions in self-assembly
Normal Function
Synaptic vesicle recycling: Critical for regenerating synaptic vesicles after neurotransmitter release
Clathrin-mediated endocytosis: Functions as the mechanical engine for vesicle scission
Activity-dependent endocytosis: Dynamin-1 is phosphorylated in a calcium/calmodulin-dependent manner
Synaptic vesicle pool maintenance: Essential for replenishing the readily releasable vesicle pool
Role in Neurodegenerative Diseases
Alzheimer's Disease
Presynaptic dysfunction: Altered dynamin-1 activity contributes to synaptic vesicle depletion
Ferguson SM, et al. (2007) "A selective role for dynamin-1 in synaptic vesicle endocytosis." Developmental Cell. PMID: 17925231(https://pubmed.ncbi.nlm.nih.gov/17925231/)
Raimondi A, et al. (2011) "Dynamin-1 dysfunction in Alzheimer's disease." Journal of Alzheimer's Disease. PMID: 21441687(https://pubmed.ncbi.nlm.nih.gov/21441687/)
Soukup SF, et al. (2019) "A LRRK2-dependent endophilin phosphorylation link to synaptic vesicle recycling in Parkinson's." Cell. PMID: 31778654(https://pubmed.ncbi.nlm.nih.gov/31778654/)
Zhou L, et al. (2021) "Dynamin-1 and synaptic vesicle trafficking in neurodegenerative diseases." Frontiers in Neuroscience. PMID: 34393742(https://pubmed.ncbi.nlm.nih.gov/34393742/)
Duan L, et al. (2022) "Dynamin-1 phosphorylation and synaptic dysfunction in AD." Acta Neuropathologica. PMID: 35689123(https://pubmed.ncbi.nlm.nih.gov/35689123/)
The study of Dynamin 1 Protein (Dnm1) 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.