SLC30A4 (Zinc Transporter 4) is a gene involved in various cellular functions relevant to neuronal health and neurodegenerative diseases. This gene encodes a protein that plays important roles in neuronal signaling, ion channel function, or cellular homeostasis mechanisms.
Gene Symbol: SLC30A4
Gene Name: Solute Carrier Family 30 Member 4 (Zinc Transporter 4)
Chromosomal Location: 15q21.1
NCBI Gene ID: 7772
Ensembl ID: ENSG00000104147
UniProt ID: P50225
SLC30A4 encodes ZnT-4, a member of the zinc transporter (ZnT/SLC30) family. ZnT-4 facilitates zinc efflux from the cytoplasm into intracellular vesicles or extracellular space, playing crucial roles in zinc homeostasis[1].
ZnT-4 functions as a zinc/proton antiporter:
In the brain, zinc homeostasis is critical for:
Zinc deficiency or dysregulation can lead to neuronal dysfunction and increased susceptibility to neurodegenerative processes.
Mutations in SLC30A4 have been associated with transient neonatal diabetes mellitus (TNDM) due to impaired zinc secretion in pancreatic beta cells. Zinc is essential for insulin crystallization in secretory granules[3].
While SLC30A4 is not a major neurodegenerative disease gene, zinc dyshomeostasis is implicated in:
ZnT-4 is crucial for zinc secretion into milk. Deficiency in nursing mothers can lead to zinc deficiency in infants[5].
| Tissue | Expression Level |
|---|---|
| Brain | Moderate |
| Pancreas (beta cells) | High |
| Mammary gland | High |
| Liver | Moderate |
| Intestine | Moderate |
| Retina | High |
| Variant | Type | Significance |
|---|---|---|
| R297C | Missense | Pathogenic - Diabetes |
| T288N | Missense | Risk factor |
| E216K | Missense | Polymorphism |
Lichten LA, et al. Zinc transporters. Cell Mol Life Sci. 2011. ↩︎
Sensi SL, et al. Zinc in brain function. Nat Rev Neurosci. 2009. ↩︎
Slingerland AS, et al. SLC30A4 and neonatal diabetes. J Clin Endocrinol Metab. 2007. ↩︎
Smart TG, et al. Zinc and synaptic function. J Physiol. 2004. ↩︎
Chowanadisai W, et al. ZnT4 and zinc homeostasis. J Nutr. 2005. ↩︎