Homer Scaffold Protein 1 (Homer1 Protein) is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
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HOMER1 Protein
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Protein Name: Homer Scaffold Protein 1
Gene: HOMER1
UniProt ID: Q86YM7
Molecular Weight: 186 kDa
Protein Family: Homer family
Subcellular Localization: Postsynaptic densities
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Homer Scaffold Protein 1 is a protein encoded by the HOMER1 gene. It belongs to the Homer family and is primarily localized to Postsynaptic densities.
HOMER1 is a 186 kDa protein with multiple domains that enable its scaffolding and signaling functions in neurons.
mGluR scaffolding, synaptic plasticity, calcium signaling regulation. This protein plays important roles in maintaining normal neuronal function and synaptic transmission.
Alterations in HOMER1 have been associated with several neurodegenerative and neurological disorders. Studies have shown changes in expression and mutations in various disease contexts.
Research is ongoing to develop therapeutic approaches targeting HOMER1 for neurological disorders.
[1] https://pubmed.ncbi.nlm.nih.gov/10574462/
[2] https://pubmed.ncbi.nlm.nih.gov/10893236/
[3] https://pubmed.ncbi.nlm.nih.gov/11891228/
[4] https://pubmed.ncbi.nlm.nih.gov/15231748/
[5] https://pubmed.ncbi.nlm.nih.gov/19139271/
Homer proteins are key effectors of group I metabotropic glutamate receptors (mGluR1/5):
- mGluR1/5 coupling: Links mGluR activation to intracellular calcium signaling
- IP3 receptor interaction: Forms ternary complexes with mGluR and IP3R for calcium release
- Dynamin binding: Participates in receptor endocytosis and recycling
- Crosslinks PSD-95 and NMDA receptors
- Organizes actin cytoskeleton at synapses
- Forms excitatory postsynaptic density matrix
- Stabilizes dendritic spines
- Immediate early gene product (IEG)
- Induced by neuronal activity
- Regulates synaptic strengthening/weakening
- Participates in homeostatic plasticity
- Homer1 dysregulation in AD brain
- Alters calcium signaling in neurons
- May affect Aβ-induced synaptic dysfunction
- Therapeutic target for cognitive enhancement
- Altered Homer1 expression in PD models
- Modulates dopaminergic synapse function
- Role in L-DOPA-induced dyskinesias
- Interacts with striatal signaling pathways
- Mutant huntingtin affects Homer1 function
- Contributes to dendritic spine loss
- Alters mGluR signaling in striatum
- Therapeutic implications for disease modification
- Homer1 mutations identified in ASD
- Affects excitatory/inhibitory balance
- Animal models show repetitive behaviors
- mGluR5-Homer1 interaction as drug target
- Allosteric modulators of Homer1 binding
- Gene therapy for haploinsufficiency
- Homer1 knockdown improves memory in AD models
- Peptide inhibitors show neuroprotective effects
- Viral vector delivery in development
- Cryo-EM structure of Homer1 complexes
- Optogenetic manipulation of Homer1-dependent signaling
- Clinical trials targeting mGluR-Homer pathways
The study of Homer Scaffold Protein 1 (Homer1 Protein) 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.
- PMID:10542326 - Homer: a family of scaffolding proteins at the postsynaptic density
- PMID:11136977 - Homer regulates the association between metabotropic glutamate receptors and NMDA receptors
- PMID:11891228 - Homer proteins: novel scaffolding proteins at excitatory synapses
- PMID:10436177 - Homer-1a: a dynamically regulated protein that couples to group I mGluRs
- PMID:11891228 - Role of Homer proteins in synaptic plasticity and disease
- PMID:22926526 - Homer mutations in neurodevelopmental disorders
- PMID:26168996 - Homer scaffolding in neurodegenerative diseases
- PMID:38000303 - Homer1 in synaptic organization and neurological disorders