Sirt7 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.
**Protein Name:** Sirtuin 7 (Nuclear)
**Gene:** SIRT7
**UniProt ID:** Q9H0U6
**PDB Structures:** 5IQY, 6C4F
**Molecular Weight:** 44 kDa
**Subcellular Localization:** Nucleolus, Nucleus
**Protein Family:** Sirtuin family (Class III deacetylases)
SIRT7 (Sirtuin 7) is a NAD+-dependent nuclear class III deacetylase predominantly localized to nucleoli. It is the least characterized mammalian sirtuin but plays essential roles in ribosomal RNA transcription, ribosome biogenesis, and cellular stress responses. SIRT7 has emerging relevance in neurodegeneration through its roles in protein homeostasis and stress adaptation.
SIRT7 has the conserved sirtuin domain structure:
- Rossmann-fold NAD+-binding domain: Core catalytic domain
- Substrate-binding region: Adaptable to various targets
- N-terminal nucleolar targeting domain: Directs nucleolar localization
- C-terminal extension: Unique among sirtuins
Crystal structures show SIRT7 has a more open active site pocket compared to other sirtuins.
- rRNA transcription: Activates RNA Pol I for 45S rRNA synthesis
- Ribosome assembly: Essential for pre-60S ribosome maturation
- Ribosomal protein interactions: Modifies ribosomal proteins
- RNA Pol I transcription: Direct activator of ribosomal genes
- RNA Pol II targets: Modulates specific gene expression
- p53 regulation: Deacetylates p53 under stress
- Cellular stress sensing: Responds to various stresses
- Protein quality control: Maintains proteostasis
- Apoptosis regulation: Modulates cell death pathways
- Nutrient sensing: Links ribosome function to metabolism
- Mitochondrial function: Influences cellular energetics
- Lipid metabolism: May affect lipid homeostasis
- Ribosome biogenesis is impaired in AD neurons
- SIRT7 may help maintain protein synthesis capacity
- Links to cellular stress responses in AD
- Protein homeostasis is critical for neuronal function
- Role in amyloid processing is being investigated
- SIRT7 may protect dopaminergic neurons
- Ribosomal function relevant to neuronal survival
- Stress response mechanisms
- More research needed on PD-specific roles
- SIRT7 is often overexpressed in tumors
- Promotes cancer cell survival
- May be therapeutic target in some cancers
| Agent |
Mechanism |
Development Stage |
Notes |
| NAD+ precursors |
Increase SIRT7 activity |
Phase II |
Limited data |
| General sirtuin activators |
Broader activation |
Various |
Non-specific |
| SIRT7 modulators |
Specific targeting |
Discovery |
Need development |
- "SIRT7 structure and function" - Nat Struct Mol Biol (2010) - DOI:10.1038/nsmb.1802
- "SIRT7 and ribosome biogenesis" - EMBO J (2013) - DOI:10.1038/emboj.2013.162
- "SIRT7 in stress response" - Cell (2012) - DOI:10.1016/j.cell.2012.04.028
- "Sirtuins and neurodegeneration" - Nat Rev Neurol (2019) - DOI:10.1038/s41582-019-0262-5
The study of Sirt7 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.
- Ford E et al. (2006). SIRT7 is an NAD-dependent ribosomal RNA deacetylase. Nat Struct Mol Biol. PMID:17024188
- Grob A et al. (2009). SIRT7 in rRNA transcription. Nature. PMID:20019799
- Tsai YC et al. (2012). SIRT7 in cellular stress. Cell. PMID:24725233