MAL2
Chr 8mal, T cell differentiation protein 2
The protein is a transmembrane component of lipid rafts that is required for transcytosis, the intracellular transport pathway that delivers proteins and cargo from the basolateral to apical cell surface in polarized cells. Mutations cause autosomal recessive congenital diarrhea with protein-losing enteropathy, presenting in early infancy with severe diarrhea and failure to thrive due to intestinal epithelial transport defects. This gene shows relatively low constraint to loss-of-function variants.
Population Genetics & Constraint
gnomAD v4 — loss-of-function & missense intolerance
Highly tolerant — LoF variants common in population
Mild missense constraint
This gene has evidence for multiple mechanisms of pathogenicity (gain-of-function and dominant-negative). Both the Badonyi & Marsh prediction and the broader genomic evidence point to gain-of-function as the predominant mechanism. Different variants in this gene may act through different mechanisms — interpret in context of the specific variant.
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
85 submitted variants in ClinVar
Classification Summary
Curated Variants Distribution
Classified variants from ClinVar · 5 ACMG categories
| Classification | LoF | Missense + Inframe | Non-coding | Synonymous | Total |
|---|---|---|---|---|---|
Pathogenic | 0 | 0 | 55 | 0 | 55 |
Likely Pathogenic | 0 | 0 | 0 | 0 | 0 |
VUS | 0 | 11 | 6 | 0 | 17 |
Likely Benign | 0 | 0 | 2 | 0 | 2 |
Benign | 0 | 0 | 0 | 0 | 0 |
| Total | 0 | 11 | 63 | 0 | 74 |
LoF = frameshift, stop gained/lost, canonical splice · Counts from ClinVar esearch · Updated hourly
View in ClinVar →Protein Context — Lollipop Plot
MAL2 · protein map & ClinVar variants
Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.
External Resources
Links to major genomics databases and tools
Clinical Trials
Active and recruiting trials from ClinicalTrials.gov
No active trials found for this gene.
Search ClinicalTrials.gov →External Resources
Links to major genomics databases and tools