EXOC8

Chr 1AR

exocyst complex component 8

Also known as: EXO84, Exo84p, NEDMISB, SEC84

NCBI Gene: 149371ENSG00000116903UniProt: Q8IYI6

This gene encodes a component of the exocyst complex, an evolutionarily conserved multi-protein complex that plays a critical role in vesicular trafficking and the secretory pathway by targeting post-Golgi vesicles to the plasma membrane. This protein is a target of activated Ral subfamily of GTPases and thereby regulates exocytosis by tethering vesicles to the plasma membrane. Mutations in this gene may be related to Joubert syndrome. [provided by RefSeq, Sep 2016]

Primary Disease Associations & Inheritance

?Neurodevelopmental disorder with microcephaly, seizures, and brain atrophyMIM #619076
AR
146
ClinVar variants
39
Pathogenic / LP
1.00
pLI score· haploinsufficient
0
Active trials
Clinical Summary— EXOC8
⚡
Population Constraint (gnomAD)
Highly constrained gene — heterozygous loss-of-function variants are very rare in the population (pLI 1.00). One damaged copy is likely sufficient to cause disease.
📋
ClinVar Variants
39 Pathogenic / Likely Pathogenic· 83 VUS of 146 total submissions

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

gnomAD
LoF intolerant — likely haploinsufficient
LoF Constraint?LOEUF (Loss-of-function Observed/Expected Upper bound Fraction) is the upper bound of the 90% CI for LoF OE — the preferred gnomAD v4 metric. Lower = more intolerant to LoF. LOEUF < 0.35 = highly constrained.
0.19LOEUF
pLI 0.999
Z-score 4.40
OE 0.04 (0.01–0.19)
Highly constrained

Highly LoF-intolerant (top ~10% of genes)

Missense Constraint?Missense Z-score: standard deviations fewer missense variants observed vs. expected. Z > 3.09 (p < 0.001) = gene does not tolerate missense variation. OE missense < 0.6 is also considered constrained.
2.04Z-score
OE missense 0.72 (0.65–0.79)
294 obs / 410.4 exp
Mild constraint

Moderately missense-constrained (top ~2.5%)

Observed / Expected Ratios?Shaded band = 90% confidence interval. Vertical tick = point estimate. Grey threshold line = gnomAD constraint cutoff for that variant class.
LoF OE?Ratio of observed to expected LoF variants. Upper CI bound (LOEUF) ≤ 0.35 = strong LoF constraint signal.0.04 (0.01–0.19)
0≤0.351.4
Missense OE?Ratio of observed to expected missense variants. OE ≤ 0.6 = fewer missense variants than expected by chance.0.72 (0.65–0.79)
0≤0.61.4
Synonymous OE?Control metric — synonymous variants are largely neutral and expected near OE = 1.0. Significant deviation may indicate annotation issues.1.01
0≤1.21.6
LoF obs/exp: 1 / 24.5Missense obs/exp: 294 / 410.4Syn Z: -0.05

ClinVar Variant Classifications

146 submitted variants in ClinVar

ClinVar

Classification Summary

Pathogenic35
Likely Pathogenic4
VUS83
Likely Benign16
Benign8
35
Pathogenic
4
Likely Pathogenic
83
VUS
16
Likely Benign
8
Benign

Curated Variants Distribution

Classified variants from ClinVar · 5 ACMG categories

ClassificationLoFMissense + InframeNon-codingSynonymousTotal
Pathogenic
0
0
35
0
35
Likely Pathogenic
2
0
2
0
4
VUS
2
78
3
0
83
Likely Benign
0
2
1
13
16
Benign
0
2
2
4
8
Total4824317146

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

View in ClinVar →

Protein Context — Lollipop Plot

EXOC8 · protein map & ClinVar variants

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

OMIM — Genotype-Phenotype Relationships

1 OMIM entry

OMIM

?Neurodevelopmental disorder with microcephaly, seizures, and brain atrophy

MIM #619076

Molecular basis of disorder known

Autosomal recessive
Clinical Literature
Landmark / reviewRecent case evidence
Key Publications
Landmark & review papers · by relevance
PubMed
Top 10 resultsSearch PubMed ↗
Recent Gene-Specific Literature
Gene in title · MEDLINE · newest first
Europe PMC
Top 5 resultsSearch Europe PMC ↗

Clinical Trials

Active and recruiting trials from ClinicalTrials.gov

ClinicalTrials.gov

No active trials found for this gene.

Search ClinicalTrials.gov →

External Resources

Links to major genomics databases and tools