EMC3

Chr 3

ER membrane protein complex subunit 3

Also known as: POB, TMEM111

EMC3 encodes a component of the endoplasmic reticulum membrane protein complex (EMC) that facilitates the insertion of newly synthesized membrane proteins into ER membranes, particularly those with weakly hydrophobic transmembrane domains or destabilizing features. Mutations cause a neurodevelopmental disorder with global developmental delay, intellectual disability, and seizures, inherited in an autosomal recessive pattern. The gene shows moderate constraint against loss-of-function variants (LOEUF 0.547), consistent with its essential role in cellular protein trafficking.

OMIMResearchSummary from RefSeq, UniProt
LOEUF 0.55
Clinical SummaryEMC3
Population Constraint (gnomAD)
Constrained for loss-of-function variants (OE-LoF 0.24) despite low pLI — interpret in context.

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

Moderate LoF intolerance
LoF Constraint
0.55LOEUF
pLI 0.286
Z-score 2.89
OE 0.24 (0.120.55)
Moderately constrained

More LoF-intolerant than ~75% of genes

Missense Constraint
1.93Z-score
OE missense 0.56 (0.470.67)
83 obs / 149.2 exp
Tolerant

Mild missense constraint

Observed / Expected Ratios
LoF OE0.24 (0.120.55)
00.351.4
Missense OE0.56 (0.470.67)
00.61.4
Synonymous OE1.06
01.21.6
LoF obs/exp: 4 / 16.7Missense obs/exp: 83 / 149.2Syn Z: -0.32

ClinVar Variant Classifications

0 submitted variants in ClinVar

Protein Context — Lollipop Plot

EMC3 · 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.

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Clinical Literature
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Full-Text Mentions
NLP-detected gene mentions in article bodies · via PubTator3
PubTator3
Top 5 full-text resultsSearch PubTator3 ↗