SIRT6 Gene

Introduction

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.

^{1(2009)2009 · Cell · PMID 19837037Open reference}

SIRT6

^{2(2010)2010 · J Biol Chem · PMID 20615890Open reference}

^{3(2020)2020 · J Neurosci · PMID 32646921Open reference} **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

Pathway Diagram

flowchart TD
    SIRT6["SIRT6"]
    style SIRT6 fill:#006494,stroke:#4fc3f7,stroke-width:3px,color:#e0e0e0
    Macrophage_Efferocytosis["Macrophage Efferocytosis"]
    SIRT6 -->|"regulates"| Macrophage_Efferocytosis
    Retinal_Ganglion_Cell_Degenera["Retinal Ganglion Cell Degeneration"]
    SIRT6 -->|"protects against"| Retinal_Ganglion_Cell_Degenera
    Optic_Nerve_Degeneration["Optic Nerve Degeneration"]
    SIRT6 -->|"protects against"| Optic_Nerve_Degeneration
    Retinal_Ganglion_Cell["Retinal Ganglion Cell"]
    SIRT6 -->|"expressed in"| Retinal_Ganglion_Cell
    miR_216a_5p_216b_5p_217_Cluste["miR-216a-5p-216b-5p-217 Cluster"]
    SIRT6 -->|"inhibits"| miR_216a_5p_216b_5p_217_Cluste
    Retinal_Ganglion_Cell_Senescen["Retinal Ganglion Cell Senescence"]
    SIRT6 -->|"inhibits"| Retinal_Ganglion_Cell_Senescen
    Epigenetics["Epigenetics"]
    SIRT6 -->|"involved in"| Epigenetics
    Retinal_Ganglion_Cells["Retinal Ganglion Cells"]
    SIRT6 -->|"expressed in"| Retinal_Ganglion_Cells
    h_50a535f9["h-50a535f9"]
    h_50a535f9 -->|"therapeutic target"| SIRT6
    h_50a535f9 -->|"targets gene"| SIRT6
    h_50a535f9 -->|"targets"| SIRT6
    Withaferin_A["Withaferin A"]
    Withaferin_A -->|"modulates"| SIRT6
    style Macrophage_Efferocytosis fill:#888,stroke:#4fc3f7,color:#e0e0e0
    style Retinal_Ganglion_Cell_Degenera fill:#888,stroke:#4fc3f7,color:#e0e0e0
    style Optic_Nerve_Degeneration fill:#888,stroke:#4fc3f7,color:#e0e0e0
    style Retinal_Ganglion_Cell fill:#888,stroke:#4fc3f7,color:#e0e0e0
    style miR_216a_5p_216b_5p_217_Cluste fill:#888,stroke:#4fc3f7,color:#e0e0e0
    style Retinal_Ganglion_Cell_Senescen fill:#888,stroke:#4fc3f7,color:#e0e0e0
    style Epigenetics fill:#5d4400,stroke:#4fc3f7,color:#e0e0e0
    style Retinal_Ganglion_Cells fill:#888,stroke:#4fc3f7,color:#e0e0e0
    style h_50a535f9 fill:#888,stroke:#4fc3f7,color:#e0e0e0
    style Withaferin_A fill:#006494,stroke:#4fc3f7,color:#e0e0e0

Overview

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.

Function

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

Disease Associations

Alzheimer’s Disease

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

Parkinson’s Disease

SIRT6 protects dopaminergic neurons:

DNA repair in neurons (vulnerable to DNA damage)
Mitochondrial function maintenance
Anti-inflammatory effects
Protection against oxidative stress

Huntington’s Disease

Benefits in HD:

Counteracts mutant huntingtin toxicity
DNA repair deficits in HD
Metabolic dysregulation
SIRT6 activators show preclinical promise

Expression

SIRT6 is expressed in most tissues:

Brain: cortex, hippocampus, cerebellum
Substantia nigra
Low expression but inducible under stress
Nuclear and mitochondrial localization

Key Publications

“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

Therapeutic Targeting

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

Cross-Links

Background

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.