LMF2
Chr 22lipase maturation factor 2
Also known as: TMEM112B, TMEM153
LMF2 encodes a protein involved in the maturation of specific proteins in the endoplasmic reticulum, particularly required for maturation and transport of lipoprotein lipase through the secretory pathway. Mutations cause lipoprotein lipase deficiency with severe hypertriglyceridemia, inherited in an autosomal recessive pattern. The gene shows low constraint against loss-of-function variants, consistent with the recessive inheritance pattern observed clinically.
Population Genetics & Constraint
gnomAD v4 — loss-of-function & missense intolerance
Highly tolerant — LoF variants common in population
Tolerant to missense variation
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
388 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 | 142 | 0 | 142 |
Likely Pathogenic | 0 | 0 | 1 | 0 | 1 |
VUS | 0 | 186 | 16 | 0 | 202 |
Likely Benign | 0 | 11 | 1 | 4 | 16 |
Benign | 0 | 0 | 2 | 0 | 2 |
| Total | 0 | 197 | 162 | 4 | 363 |
LoF = frameshift, stop gained/lost, canonical splice · Counts from ClinVar esearch · Updated hourly
View in ClinVar →Protein Context — Lollipop Plot
LMF2 · protein map & ClinVar variants
Showing all ClinVar variants across the protein. Search a specific variant to highlight its position.
3D Protein StructureAlphaFold
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