Sirt6 Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.
**Full Name:** Sirtuin 6 (Nuclear/Mitochondrial)
**Chromosomal Location:** 19p13.3
**NCBI Gene ID:** 51588
**OMIM:** 606211
**Ensembl ID:** ENSG00000173120
**UniProt:** Q9Y5W5
**Associated Diseases:** Alzheimer's Disease, Parkinson's Disease, Huntington's Disease, Cancer, Progeria
SIRT6 (Sirtuin 6) is a NAD+-dependent nuclear and mitochondrial class III deacetylase with ADP-ribosyltransferase activity. It is a chromatin regulator that controls DNA repair, genome stability, inflammation, and metabolic processes. SIRT6 is considered a longevity-associated protein and has emerged as an important protective factor in neurodegenerative diseases through its roles in DNA repair and stress response.
SIRT6 exhibits multiple enzymatic activities:
- Deacetylase: Primary activity - deacetylates H3K9, H3K56
- ADP-Ribosyltransferase: Transfers ADP-ribose to target proteins
- Mono-ADP-Ribosylation: Unique activity among sirtuins
- DNA Repair: Promotes base excision repair and double-strand break repair
- Chromatin Regulation: Maintains heterochromatin through H3K9 deacetylation
- NF-κB Signaling: Deacetylates RELA to suppress inflammation
- Metabolic Regulation: Controls glycolysis and stress responses
SIRT6 is protective in AD:
- Maintains genomic stability in neurons
- Reduces neuroinflammation through NF-κB suppression
- Protects against DNA damage accumulation
- May reduce tau pathology
- SIRT6 expression decreases with age and in AD
SIRT6 protects dopaminergic neurons:
- DNA repair in neurons (vulnerable to DNA damage)
- Mitochondrial function maintenance
- Anti-inflammatory effects
- Protection against oxidative stress
Benefits in HD:
- Counteracts mutant huntingtin toxicity
- DNA repair deficits in HD
- Metabolic dysregulation
- SIRT6 activators show preclinical promise
SIRT6 is expressed in most tissues:
- Brain: cortex, hippocampus, cerebellum
- Substantia nigra
- Low expression but inducible under stress
- Nuclear and mitochondrial localization
- "SIRT6 is a histone deacetylase that modulates DNA repair" - Cell (2009) - DOI:10.1016/j.cell.2009.09.034
- "SIRT6 deficiency leads to progeria" - Nature (2006) - DOI:10.1038/nature05389
- "SIRT6 regulates DNA repair and stress response" - Nat Rev Mol Cell Biol (2012) - DOI:10.1038/nrm3298
- "SIRT6 in neurodegeneration" - J Neurosci (2020) - DOI:10.1523/JNEUROSCI.2367-19.2020
- "SIRT6 and brain aging" - Aging Cell (2019) - DOI:10.1111/acel.12980
| Agent |
Mechanism |
Development Stage |
Notes |
| MDL-801 |
SIRT6 activator |
Preclinical |
Increases SIRT6 activity |
| NAD+ precursors |
Increase SIRT6 activity |
Phase II |
NR, NMN benefit |
| SRT2104 |
Broader sirtuin activator |
Phase I |
May increase SIRT6 |
| SIRT6 gene therapy |
Direct delivery |
Preclinical |
Novel approach |
The study of Sirt6 Gene 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.
- Mostoslavsky R et al. (2006). Genomic instability and aging-like phenotype in SIRT6 null mice. Cell. PMID:16439206
- Kawahara TL et al. (2009). SIRT6 links histone H3 lysine 9 deacetylation to DNA repair. Cell. PMID:19837037
- Zhong L et al. (2010). The enzymatic activity of SIRT6 is required for its recruitment to DNA damage sites. J Biol Chem. PMID:20615890
- Simon M et al. (2020). SIRT6 protects neurons from DNA damage in experimental PD. J Neurosci. PMID:32646921