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MFSD3

Chr 8

solute carrier family 33 member 2

Also known as: MFSD3

Predicted to enable transmembrane transporter activity. Predicted to be involved in transmembrane transport. Predicted to be located in membrane. [provided by Alliance of Genome Resources, Jul 2025]

ResearchGenerating clinical summary…
DNmechanismLOEUF 1.85
Clinical SummaryMFSD3
Population Constraint (gnomAD)
Low constraint (pLI 0.00) — loss-of-function variants are relatively tolerated in the population.
📋
ClinVar Variants
51 VUS of 54 total submissions
Some data sources returned errors (2)

ensembl: Error: Ensembl fetch failed: 400 for /lookup/symbol/homo_sapiens/MFSD3?content-type=application/json&expand=1

omim: Error: OMIM fetch failed: 429

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

Tolerant — LoF & missense variants common in population
LoF Constraint?
1.85LOEUF
pLI 0.000
Z-score -0.95
OE 1.30 (0.861.85)
Tolerant

Highly tolerant — LoF variants common in population

Missense Constraint?
-1.39Z-score
OE missense 1.27 (1.151.41)
264 obs / 207.5 exp
Tolerant

Tolerant to missense variation

Observed / Expected Ratios?
LoF OE?1.30 (0.861.85)
00.351.4
Missense OE?1.27 (1.151.41)
00.61.4
Synonymous OE?1.38
01.21.6
LoF obs/exp: 15 / 11.5Missense obs/exp: 264 / 207.5Syn Z: -3.18

This gene — mechanism propensity

DN
0.6454th %ile
GOF
0.6150th %ile
LOF
0.3649th %ile

The highest-scoring mechanism for this gene is dominant-negative.

DNprediction above median

Note: In-silico variant effect predictors (SIFT, PolyPhen, REVEL, CADD) may underestimate pathogenicity of missense variants in genes with GOF or DN mechanisms. Consider functional evidence and clinical context.

Predictions from Badonyi M, Marsh JA. PLoS ONE. 2024;19(8):e0307312.

ClinVar Variant Classifications

54 submitted variants in ClinVar

Classification Summary

VUS51
Likely Benign3
51
VUS
3
Likely Benign

Curated Variants Distribution

Classified variants from ClinVar · 5 ACMG categories

ClassificationLoFMissense + InframeNon-codingSynonymousTotal
Pathogenic
0
0
0
0
0
Likely Pathogenic
0
0
0
0
0
VUS
0
51
0
0
51
Likely Benign
0
3
0
0
3
Benign
0
0
0
0
0
Total0540054

LoF = frameshift, stop gained/lost, canonical splice · Counts from ClinVar esearch · Updated hourly

View in ClinVar →

24 pathogenic / likely-pathogenic (of 39) ClinVar copy-number / structural variants overlap MFSD3 — these span large chromosomal regions, not the gene specifically, and are excluded from the counts above. Explore in CNV tools →

Protein Context — Lollipop Plot

MFSD3 · 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.

Search ClinicalTrials.gov →