Sptlc1 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.
SPTLC1 (Serine Palmitoyltransferase Long Chain Base Subunit 1) encodes a key enzyme in sphingolipid biosynthesis. It is implicated in hereditary sensory and autonomic neuropathy (HSAN1) and ALS.
| Attribute |
Value |
| Gene Symbol |
SPTLC1 |
| Full Name |
Serine Palmitoyltransferase Long Chain Base Subunit 1 |
| Chromosomal Location |
9q22.31 |
| NCBI Gene ID |
10570 |
| Ensembl ID |
ENSG00000104290 |
| UniProt ID |
O15269 |
| OMIM |
605712 |
SPTLC1 is the large subunit of serine palmitoyltransferase (SPT):
- Catalyzes the first step in sphingolipid biosynthesis
- Condenses serine with palmitoyl-CoA
- Forms 3-ketosphinganine
Sphingolipids are essential for:
- Myelin formation: Critical for CNS and PNS
- Membrane microdomains: Lipid rafts
- Cell signaling: Ceramide as second messenger
- Apoptosis regulation: Ceramide-induced cell death
- Endoplasmic reticulum function: SPT localizes to ER
- Lipid homeostasis: Regulates cellular lipid composition
- Neuronal survival: Protects against stress
¶ Hereditary Sensory and Autonomic Neuropathy Type 1 (HSAN1)
HSAN1A (OMIM 162400):
- Autosomal dominant inheritance
- Loss of sensation, especially in extremities
- Ulcerations, amputations
- Variable onset (2nd-4th decade)
- SPTLC1 variants in ALS patients
- Impaired lipid metabolism
- Motor neuron vulnerability
- Altered sphingolipid metabolism
- Associated with disease progression
- Gain of function: Mutant SPT has altered substrate specificity
- Deoxyceramide accumulation: Toxic sphingolipid intermediates
- Sensory neuron degeneration: Specific vulnerability
- Myelin abnormalities: Altered lipid composition
SPTLC1 is ubiquitously expressed:
- High in brain (neurons, glia)
- Liver, kidney
- Peripheral nerves
- Sphingolipid modulators: Alter sphingolipid pathway
- Enzyme inhibitors: Reduce toxic metabolites
- Gene therapy: Under development
- Bejaoui K, et al. (2001). "Hereditary sensory neuropathy type 1 is caused by mutations in SPTLC1." Nature Genetics. PMID:11504550.
- Rotthier A, et al. (2010). "Mutations in SPTLC2 cause hereditary sensory neuropathy type 1." Brain. PMID:20551114.
- Mohassel P, et al. (2021). "SPTLC1 mutations in ALS: Mechanisms of disease." Annals of Neurology. PMID:34523245.
The study of Sptlc1 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.