BET1

Chr 7AR

Bet1 golgi vesicular membrane trafficking protein

Also known as: HBET1, MDRP

The BET1 protein is required for vesicular transport from the endoplasmic reticulum to the Golgi complex, functioning as a SNARE protein involved in docking ER-derived vesicles with the cis-Golgi membrane. Mutations cause autosomal recessive congenital muscular dystrophy with rapid progression. The gene shows low constraint to loss-of-function variation (pLI 0.004, LOEUF 1.60).

OMIMResearchSummary from RefSeq, OMIM, UniProt
MultiplemechanismARLOEUF 1.601 OMIM phenotype
Clinical SummaryBET1
Population Constraint (gnomAD)
Low constraint (pLI 0.00) — loss-of-function variants are relatively tolerated in the population.
📋
ClinVar Variants
18 unique Pathogenic / Likely Pathogenic· 19 VUS of 42 total submissions

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

Tolerant — LoF & missense variants common in population
LoF Constraint
1.60LOEUF
pLI 0.004
Z-score 0.57
OE 0.74 (0.361.60)
Tolerant

Highly tolerant — LoF variants common in population

Missense Constraint
0.22Z-score
OE missense 0.92 (0.731.16)
52 obs / 56.6 exp
Tolerant

Mild missense constraint

Observed / Expected Ratios
LoF OE0.74 (0.361.60)
00.351.4
Missense OE0.92 (0.731.16)
00.61.4
Synonymous OE0.53
01.21.6
LoF obs/exp: 4 / 5.4Missense obs/exp: 52 / 56.6Syn Z: 1.68
DN
0.86top 5%
GOF
0.73top 25%
LOF
0.2092th %ile

This gene has evidence for multiple mechanisms of pathogenicity (dominant-negative and gain-of-function). Both the Badonyi & Marsh prediction and the broader genomic evidence point to dominant-negative as the predominant mechanism. Different variants in this gene may act through different mechanisms — interpret in context of the specific variant.

DNprediction above median
GOFprediction 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

42 submitted variants in ClinVar

Classification Summary

Pathogenic16
Likely Pathogenic2
VUS19
16
Pathogenic
2
Likely Pathogenic
19
VUS

Curated Variants Distribution

Classified variants from ClinVar · 5 ACMG categories

ClassificationLoFMissense + InframeNon-codingSynonymousTotal
Pathogenic
0
0
16
0
16
Likely Pathogenic
1
0
1
0
2
VUS
1
12
6
0
19
Likely Benign
0
0
0
0
0
Benign
0
0
0
0
0
Total21223037

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

View in ClinVar →

Protein Context — Lollipop Plot

BET1 · protein map & ClinVar variants

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

3D Protein StructureAlphaFold

Clinical Trials

Active and recruiting trials from ClinicalTrials.gov

No active trials found for this gene.

Search ClinicalTrials.gov →
Clinical Literature
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