FAM135B

Chr 8

family with sequence similarity 135 member B

Also known as: C8ORFK32

The FAM135B protein is predicted to be involved in lipid metabolism. Mutations cause autosomal recessive intellectual disability and developmental delay. This gene is highly constrained against loss-of-function variants (pLI = 1.0, LOEUF = 0.22), indicating intolerance to protein-truncating mutations.

Summary from RefSeq
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0
Active trials
7
Pubs (1 yr)
0
P/LP submissions
P/LP missense
0.22
LOEUF· LoF intol.
LOF
Mechanism· predicted
Clinical SummaryFAM135B
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.

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

LoF intolerant — likely haploinsufficient
LoF Constraint
0.22LOEUF
pLI 1.000
Z-score 6.30
OE 0.12 (0.070.22)
Highly constrained

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

Missense Constraint
0.97Z-score
OE missense 0.90 (0.850.96)
697 obs / 772.5 exp
Tolerant

Mild missense constraint

Observed / Expected Ratios
LoF OE0.12 (0.070.22)
00.351.4
Missense OE0.90 (0.850.96)
00.61.4
Synonymous OE1.06
01.21.6
LoF obs/exp: 7 / 59.3Missense obs/exp: 697 / 772.5Syn Z: -0.80
DN
0.3296th %ile
GOF
0.3689th %ile
LOF
0.70top 10%

The highest-scoring mechanism for this gene is loss-of-function (haploinsufficiency).

LOFprediction above median · LOEUF 0.22

Predictions from Badonyi M, Marsh JA. PLoS ONE. 2024;19(8):e0307312. Mechanism ranking also informed by gnomAD constraint, ClinVar, and ClinGen data.

ClinVar Variant Classifications

0 submitted variants in ClinVar

Protein Context — Lollipop Plot

FAM135B · 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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