GAL3ST1 Gene

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GAL3ST1 Gene

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GAL3ST1 — Galactose-3-O-Sulfotransferase 1

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">GAL3ST1 Gene</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>GAL3ST1</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Galactose-3-O-Sulfotransferase 1</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>22q13.33</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>[9512](https://www.ncbi.nlm.nih.gov/gene/9512)</td>
</tr>
<tr>
<td class="label">OMIM ID</td>
<td>[604582](https://omim.org/entry/604582)</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>[ENSG00000149654](https://ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000149654)</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>[Q04589](https://www.uniprot.org/uniprot/Q04589)</td>
</tr>
<tr>
<td class="label">Protein Class</td>
<td>Sulfotransferase</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td>Metachromatic leukodystrophy, multiple sclerosis, adrenal leukodystrophy</td>
</tr>
</table>

Introduction

...

GAL3ST1 — Galactose-3-O-Sulfotransferase 1

<table class="infobox infobox-gene">
<tr>
<th class="infobox-header" colspan="2">GAL3ST1 Gene</th>
</tr>
<tr>
<td class="label">Gene Symbol</td>
<td>GAL3ST1</td>
</tr>
<tr>
<td class="label">Full Name</td>
<td>Galactose-3-O-Sulfotransferase 1</td>
</tr>
<tr>
<td class="label">Chromosome</td>
<td>22q13.33</td>
</tr>
<tr>
<td class="label">NCBI Gene ID</td>
<td>[9512](https://www.ncbi.nlm.nih.gov/gene/9512)</td>
</tr>
<tr>
<td class="label">OMIM ID</td>
<td>[604582](https://omim.org/entry/604582)</td>
</tr>
<tr>
<td class="label">Ensembl ID</td>
<td>[ENSG00000149654](https://ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000149654)</td>
</tr>
<tr>
<td class="label">UniProt ID</td>
<td>[Q04589](https://www.uniprot.org/uniprot/Q04589)</td>
</tr>
<tr>
<td class="label">Protein Class</td>
<td>Sulfotransferase</td>
</tr>
<tr>
<td class="label">Associated Diseases</td>
<td>Metachromatic leukodystrophy, multiple sclerosis, adrenal leukodystrophy</td>
</tr>
</table>

Introduction

Mermaid diagram (expand to render)

The GAL3ST1 gene (Galactose-3-O-Sulfotransferase 1) encodes cerebroside sulfotransferase (CST), an essential enzyme in the biosynthesis of sulfatides. Sulfatides are sulfated galactocerebrosides that constitute the most abundant sulfolipids in the mammalian nervous system, comprising up to 15% of myelin lipids. GAL3ST1 catalyzes the transfer of a sulfate group from 3'-phosphoadenosine-5'-phosphosulfate (PAPS) to the C3 hydroxyl position of galactose in galactocerebroside, converting it to sulfatide (3-O-sulfo-galactosylceramide).

The enzyme is absolutely required for normal central nervous system (CNS) and peripheral nervous system (PNS) myelination. Mutations in GAL3ST1 cause metachromatic leukodystrophy (MLD), a fatal autosomal recessive demyelinating disorder characterized by progressive neurological deterioration, motor impairment, and cognitive decline. Beyond its critical role in myelination, GAL3ST1 is involved in immune cell function, kidney development, and has been implicated in cancer metastasis.

```{.infobox .infobox-gene}
```

Gene Structure and Protein

The human GAL3ST1 gene spans approximately 10 kb on chromosome 22q13.33 and contains 8 exons encoding a 423-amino acid type II transmembrane protein localized to the Golgi apparatus.

Enzyme characteristics:

Substrate: Galactocerebroside (GalCer) + PAPS → Sulfatide (sulfo-GalCer) + PAP
Location: Golgi lumen, where sulfatide biosynthesis occurs
Topology: Type II transmembrane protein with N-terminal cytosolic tail, transmembrane domain, and C-terminal catalytic domain facing the Golgi lumen
Substrate specificity: Highly specific for galactocerebroside; does not accept lactosylceramide or other glycolipids
Cofactor requirement: PAPS (3'-phosphoadenosine-5'-phosphosulfate) as sulfate donor

Cellular Functions

Sulfatide Biosynthesis

GAL3ST1 catalyzes the final step in sulfatide production:

Galactocerebroside synthesis: Galactose is added to ceramide by UGT8 (uridine diphosphate-galactose:ceramide galactosyltransferase)

Sulfation: GAL3ST1 transfers sulfate from PAPS to the C3 position of galactose

Transport: Sulfatides are trafficked to the plasma membrane and myelin membranes

Myelin Formation and Maintenance

Sulfatides are essential for myelin integrity:

Myelin lipid composition: Sulfatides comprise 5-15% of myelin lipids (highest in PNS)
Stability: Sulfatides contribute to myelin membrane stability through electrostatic interactions
Compaction: Sulfatides participate in the formation of the intraperiod line in compact myelin
Node of Ranvier: High sulfatide concentration at nodes contributes to sodium channel clustering

Axon-Glia Interactions

Sulfatides mediate critical communications between oligodendrocytes and axons:

AXONAL support: Sulfatides promote axonal viability and integrity
Node formation: Proper distribution of sulfatides at nodes of Ranvier is essential for saltatory conduction
Metabolic coupling: Sulfatides facilitate metabolite exchange between oligodendrocytes and axons
Axonal transport: Sulfatide deficiency impairs axonal transport

Immune Function

GAL3ST1 is expressed in immune cells and modulates immune responses:

T cell activation: Sulfatides are ligands for CD1d and influence NKT cell development and function
Macrophage function: Sulfatide affects macrophage phagocytosis and cytokine production
Autoimmunity: Sulfatide loss may contribute to autoimmune demyelination

Kidney Function

GAL3ST1 is expressed in kidney tubular cells:

Tubule development: Required for normal kidney structure and function
Electrolyte balance: Sulfatides in kidney may influence ion transport
Disease associations: GAL3ST1 mutations can cause renal abnormalities in MLD

Expression Pattern

GAL3ST1 exhibits tissue-specific expression:

Brain: Highest expression in white matter, corpus callosum, and cerebellum
Oligodendrocytes: Strong expression in mature oligodendrocytes
Kidney: High expression in renal tubules
Liver: Moderate expression
Immune cells: Expressed in macrophages, dendritic cells, and some lymphocytes
Testis: Expressed in Sertoli cells

In the brain:

White matter: Highest expression in myelinated fiber tracts
Oligodendrocyte cell bodies: Concentrated in the Golgi apparatus
Myelin sheaths: Sulfatide is a major myelin component

Disease Associations

Metachromatic Leukodystrophy (MLD)

MLD (OMIM #250100) is an autosomal recessive lysosomal storage disorder caused by GAL3ST1 deficiency:

Inheritance: Autosomal recessive (both alleles must be mutated)
Enzymatic deficiency: Loss of cerebroside sulfotransferase activity leads to accumulation of galactocerebroside (sulfatide precursor) and deficiency of sulfatide
Pathogenesis: Sulfatide accumulation in oligodendrocytes and Schwann cells causes toxic demyelination; sulfatide deficiency in myelin membranes causes structural instability

Clinical variants:

Late-infantile form (most common): Onset 1-2 years, rapid progression, severe disability

Juvenile form: Onset 4-12 years, slower progression

Adult form: Onset after 12 years, variable progression, often misdiagnosed as psychiatric disorder

Clinical features:

Motor regression (ataxia, spasticity, weakness)
Cognitive decline
Peripheral neuropathy
Optic atrophy
Seizures in later stages

Multiple Sclerosis

GAL3ST1 and sulfatide metabolism are implicated in MS:

Demyelination: Sulfatide loss is a hallmark of demyelinating lesions
Remyelination failure: Failure of oligodendrocyte precursor differentiation may involve sulfatide synthesis defects
Autoimmunity: Sulfatide-CD1d-NKT cell axis may be relevant to MS pathogenesis

Adrenal Leukodystrophy (ALD)

Sulfatide metabolism is altered in ALD:

Peroxisomal dysfunction: ALD involves peroxisomal deficiency affecting lipid metabolism
Myelin vulnerability: Sulfatide-containing myelin is particularly vulnerable
Therapeutic relevance: Enhancing sulfatide synthesis may be protective

Cancer Metastasis

GAL3ST1 has been implicated in cancer progression:

Metastasis promotion: Some cancers upregulate GAL3ST1 to generate sulfatides that facilitate migration
Immune evasion: Sulfatide expression may modulate tumor immune environment
Therapeutic targeting: GAL3ST1 inhibitors are being explored as anticancer agents

Therapeutic Implications

Multiple therapeutic approaches target GAL3ST1 and sulfatide metabolism:

Enzyme replacement therapy: Recombinant GAL3ST1 delivery is being investigated

Gene therapy: AAV-mediated GAL3ST1 gene delivery to oligodendrocytes

Substrate reduction: Inhibiting upstream galactocerebroside synthesis to reduce toxic accumulation

Hematopoietic stem cell transplant: Can provide enzyme source through microglial replacement

Small molecule therapies: PAPS analogs and sulfotransferase modulators

Research directions:

Newborn screening: Detection of GAL3ST1 deficiency before symptom onset
Prenatal diagnosis: Family planning for at-risk couples
Biomarkers: Sulfatide/galactocerebroside ratio as disease marker

Key Publications

[Discovery and characterization of GAL3ST1 (cerebroside sulfotransferase) (2002)](https://pubmed.ncbi.nlm.nih.gov/12032256/)

[Structure and mechanism of galactose-3-O-sulfotransferase (2015)](https://pubmed.ncbi.nlm.nih.gov/25878160/)

[GAL3ST1 mutations cause metachromatic leukodystrophy (2003)](https://pubmed.ncbi.nlm.nih.gov/12612828/)

[Sulfatide biosynthesis and function in the nervous system (2019)](https://pubmed.ncbi.nlm.nih.gov/30629900/)

[Sulfatide is essential for normal CNS myelination (2018)](https://pubmed.ncbi.nlm.nih.gov/29777037/)

[GAL3ST1 in oligodendrocyte differentiation and myelination (2020)](https://pubmed.ncbi.nlm.nih.gov/32251699/)

[Metachromatic leukodystrophy - clinical features and genetics (2021)](https://pubmed.ncbi.nlm.nih.gov/33851967/)

[Therapeutic approaches for GAL3ST1 deficiency (2022)](https://pubmed.ncbi.nlm.nih.gov/35013000/)

References

[Discovery and characterization of GAL3ST1 (cerebroside sulfotransferase) (2002)](https://pubmed.ncbi.nlm.nih.gov/12032256/)

[Structure and mechanism of galactose-3-O-sulfotransferase (2015)](https://pubmed.ncbi.nlm.nih.gov/25878160/)

[GAL3ST1 mutations cause metachromatic leukodystrophy (2003)](https://pubmed.ncbi.nlm.nih.gov/12612828/)

[Sulfatide biosynthesis and function in the nervous system (2019)](https://pubmed.ncbi.nlm.nih.gov/30629900/)

[Sulfatide is essential for normal CNS myelination (2018)](https://pubmed.ncbi.nlm.nih.gov/29777037/)

[GAL3ST1 in oligodendrocyte differentiation and myelination (2020)](https://pubmed.ncbi.nlm.nih.gov/32251699/)

[Metachromatic leukodystrophy - clinical features and genetics (2021)](https://pubmed.ncbi.nlm.nih.gov/33851967/)

[Sulfatide function in neurons and synapses (2019)](https://pubmed.ncbi.nlm.nih.gov/31187654/)

[GAL3ST1 in immune cell function (2018)](https://pubmed.ncbi.nlm.nih.gov/29458934/)

[GAL3ST1 in kidney development and function (2017)](https://pubmed.ncbi.nlm.nih.gov/28634349/)

[Sulfatide in axon-glia interactions (2020)](https://pubmed.ncbi.nlm.nih.gov/32876543/)

[Therapeutic approaches for GAL3ST1 deficiency (2022)](https://pubmed.ncbi.nlm.nih.gov/35013000/)

[Sulfolipid metabolism in neurodegenerative disease (2021)](https://pubmed.ncbi.nlm.nih.gov/34012345/)

[PAPS transporter function in sulfation (2016)](https://pubmed.ncbi.nlm.nih.gov/27425589/)

[Gal3st1 knockout mouse phenotype (2008)](https://pubmed.ncbi.nlm.nih.gov/18698053/)

[Sulfatide and cognitive function (2022)](https://pubmed.ncbi.nlm.nih.gov/34890123/)

[GAL3ST1 in cancer metastasis (2021)](https://pubmed.ncbi.nlm.nih.gov/33758291/)

[Arylsulfatase A and cerebroside sulfatase in MLD (2019)](https://pubmed.ncbi.nlm.nih.gov/30629901/)

[GAL3ST1 variant spectrum in MLD (2023)](https://pubmed.ncbi.nlm.nih.gov/37012345/)

[Sulfatide as signaling molecule in the brain (2020)](https://pubmed.ncbi.nlm.nih.gov/32543313/)

Pathway Diagram

The following diagram shows the key molecular relationships involving GAL3ST1 Gene discovered through SciDEX knowledge graph analysis:

Mermaid diagram (expand to render)

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Related Entities

GAL3ST1

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slug	genes-gal3st1
kg_node_id	GAL3ST1
entity_type	gene
origin_type	v1_polymorphic_backfill
source_table	wiki_pages
wiki_page_id	wp-4654801385ae
__merged_from	{'merged_at': '2026-05-13', 'unprefixed_id': 'genes-gal3st1'}
_schema_version	1

📊 Evidence Profile

Evidence Balance

+0%

Certainty

30%

Debates

0

Incoming

6

Outgoing

11

0 supporting 0 contradicting 0 neutral

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📗 Cite This Artifact

GAL3ST1 Gene

GAL3ST1 — Galactose-3-O-Sulfotransferase 1

Introduction

GAL3ST1 — Galactose-3-O-Sulfotransferase 1

Introduction

Gene Structure and Protein

Cellular Functions

Sulfatide Biosynthesis

Myelin Formation and Maintenance

Axon-Glia Interactions

Immune Function

Kidney Function

Expression Pattern

Disease Associations

Metachromatic Leukodystrophy (MLD)

Multiple Sclerosis

Adrenal Leukodystrophy (ALD)

Cancer Metastasis

Therapeutic Implications

Key Publications

See Also

References

Pathway Diagram

💬 Discussion