FAM78A

Chr 9

family with sequence similarity 78 member A

Also known as: C9orf59

The FAM78A protein is poorly characterized with no well-established cellular function. Mutations in this gene have been associated with neurodevelopmental disorders, but the clinical phenotype and inheritance pattern are not well-defined in the current literature. This gene shows moderate constraint against loss-of-function variants (LOEUF 0.698), suggesting some intolerance to complete protein loss.

GOFmechanismLOEUF 0.70
Clinical SummaryFAM78A
Population Constraint (gnomAD)
Constrained for loss-of-function variants (OE-LoF 0.22) despite low pLI — interpret in context.

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

Tolerant — LoF & missense variants common in population
LoF Constraint
0.70LOEUF
pLI 0.373
Z-score 2.17
OE 0.22 (0.090.70)
Tolerant

Typical tolerance to LoF variation

Missense Constraint
1.80Z-score
OE missense 0.64 (0.550.74)
124 obs / 194.9 exp
Tolerant

Mild missense constraint

Observed / Expected Ratios
LoF OE0.22 (0.090.70)
00.351.4
Missense OE0.64 (0.550.74)
00.61.4
Synonymous OE0.97
01.21.6
LoF obs/exp: 2 / 9.0Missense obs/exp: 124 / 194.9Syn Z: 0.22
DN
0.4587th %ile
GOF
0.73top 25%
LOF
0.49top 25%

The highest-scoring mechanism for this gene is gain-of-function.

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

0 submitted variants in ClinVar

Protein Context — Lollipop Plot

FAM78A · 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
Open Research Assistant →
Key Publications
Landmark & review papers · by relevance
PubMed
Top 1 results · since 2015Search PubMed ↗
Recent Gene-Specific Literature
Gene in title · MEDLINE · newest first
Europe PMC

No open access results found