ST8SIA1

Chr 12

ST8 alpha-N-acetyl-neuraminide alpha-2,8-sialyltransferase 1

Also known as: GD3S, SIAT8, SIAT8-A, SIAT8A, ST8SiaI

Gangliosides are membrane-bound glycosphingolipids containing sialic acid. Ganglioside GD3 is known to be important for cell adhesion and growth of cultured malignant cells. The protein encoded by this gene is a type II membrane protein that catalyzes the transfer of sialic acid from CMP-sialic acid to GM3 to produce gangliosides GD3 and GT3. The encoded protein may be found in the Golgi apparatus and is a member of glycosyltransferase family 29. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Jan 2015]

0
Active trials
13
Pubs (1 yr)
0
P/LP submissions
P/LP missense
0.53
LOEUF
Mechanism
Clinical SummaryST8SIA1
Population Constraint (gnomAD)
Constrained for loss-of-function variants (OE-LoF 0.20) despite low pLI — interpret in context.

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

Moderate LoF intolerance
LoF Constraint
0.53LOEUF
pLI 0.493
Z-score 2.83
OE 0.20 (0.090.53)
Moderately constrained

More LoF-intolerant than ~75% of genes

Missense Constraint
1.16Z-score
OE missense 0.77 (0.680.88)
156 obs / 202.4 exp
Tolerant

Mild missense constraint

Observed / Expected Ratios
LoF OE0.20 (0.090.53)
00.351.4
Missense OE0.77 (0.680.88)
00.61.4
Synonymous OE1.00
01.21.6
LoF obs/exp: 3 / 14.7Missense obs/exp: 156 / 202.4Syn Z: -0.03

ClinVar Variant Classifications

0 submitted variants in ClinVar

Protein Context — Lollipop Plot

ST8SIA1 · protein map & ClinVar variants

Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.

Clinical Trials

Active and recruiting trials from ClinicalTrials.gov

No active trials found for this gene.

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Clinical Literature
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