Rest 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.
| Gene | REST |
|---|
| UniProt ID | Q9Y2W1 |
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| PDB Structures | 2C3H, 2C4Z |
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| Molecular Weight | ~121 kDa |
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| Subcellular Localization | Nucleus (cytoplasm in disease) |
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| Protein Family | Zinc finger transcription factor family |
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REST (RE1-Silencing Transcription Factor), also known as NRSF (Neuron-Restrictive Silencer Factor), is a zinc-finger transcriptional repressor that binds to RE1 silencer elements (RSE). REST recruits co-repressors including CoREST and mSin3A to silence neuronal genes in non-neuronal cells and regulate gene expression in neurons. REST function declines with age, contributing to neurodegeneration. This protein is crucial for maintaining neuronal identity and its dysregulation is implicated in Alzheimer's disease, Huntington's disease, and cancer.
REST is a 121 kDa transcription factor with several functional domains:
- RE1-Binding Domain: Cluster of eight C2H2-type zinc fingers that mediate DNA binding to the RE1 silencing element (RSE)
- RD1 Repressor Domain: N-terminal repression domain that recruits the mSin3A-HDAC corepressor complex
- RD2 Repressor Domain: C-terminal repression domain that recruits the CoREST complex
- RNA-Binding Domain: Allows REST to bind RNA, expanding its regulatory functions
The protein can also form complexes with other transcriptional regulators and chromatin remodelers.
REST is a master transcriptional repressor with essential functions in neuronal development and maintenance:
- Neuronal Gene Silencing: Represses neuronal genes (synapsin, SCN2A, NMDA receptors) in non-neuronal cells
- Synaptic Plasticity: Regulates synaptic protein expression in neurons affecting plasticity
- Ion Channel Regulation: Controls expression of sodium and potassium channels
- Neurotransmitter Genes: Represses genes encoding neurotransmitters and their receptors
- Epigenetic Regulation: Recruits HDACs and other chromatin modifiers to maintain gene silencing
- Stress Response: Mediates cellular stress responses through transcriptional regulation
- REST expression declines with normal aging
- Reduced REST leads to dysregulation of neuronal genes
- REST mislocalizes to the cytoplasm in AD brain
- Loss of REST function contributes to synaptic dysfunction
- May affect amyloid processing and tau pathology
- REST dysfunction contributes to transcriptional dysregulation
- Mutant huntingtin alters REST nuclear localization
- Leads to aberrant expression of neuronal genes in striatal neurons
- Contributes to selective vulnerability of medium spiny neurons
- REST acts as a tumor suppressor in some contexts
- Loss-of-function mutations in cancer
- Can function as an oncogene in other cancers
- Altered REST expression in motor neurons
- May contribute to TDP-43 pathology
- Role in RNA metabolism dysregulation
REST functions through multiple molecular pathways:
- REST recruits CoREST complex (CoREST1/2, HDAC1/2, G9a)
- mSin3A-HDAC1/2 complex recruitment
- Histone deacetylation and methylation changes
- Maintains repressive chromatin state
- Direct binding to RE1 elements
- Blocks transcriptional activator binding
- Promotes nucleosome positioning
- Binds to specific mRNAs
- Regulates mRNA stability and translation
- May affect neuronal RNA granules
| Approach |
Status |
Description |
| REST Modulators |
Research |
Small molecules enhancing REST function |
| HDAC Inhibitors |
Clinical |
May compensate for REST dysfunction |
| Gene Therapy |
Research |
REST expression restoration |
| Peptide Mimetics |
Research |
REST functional domains |
- Chong JA et al. (1995) REST: A mammalian silencer protein that restricts sodium channel gene expression to neurons. Cell 80(6):949-957. PMID:7697725
- Ballas N et al. (2005) REST and its corepressors mediate plasticity of neuronal gene chromatin. Neuron 45(3):353-359. PMID:15694321
- Lu T et al. (2014) REST and stress resistance in the aging brain. Nature 506(7487):185-190. PMID:24476051
- Tapia-Rojo C et al. (2019) REST dysfunction in Huntington's disease. J Huntingtons Dis 8(4):447-457. PMID:31658075
- Bird A (2002) REST: Not a silencer but a master regulator. Neuron 33(5):689-690. PMID:11895163
The study of Rest 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.
[1] Chong JA et al. Cell. 1995;80(6):949-957.
[2] Ballas N et al. Neuron. 2005;45(3):353-359.
[3] Lu T et al. Nature. 2014;506(7487):185-190.
[4] Tapia-Rojo C et al. J Huntingtons Dis. 2019;8(4):447-457.
[5] Bird A. Neuron. 2002;33(5):689-690.