FBXL6

Chr 8

F-box and leucine rich repeat protein 6

Also known as: FBL6, FBL6A, PP14630

The protein serves as a substrate-recognition component of the SCF E3 ubiquitin ligase complex, which targets specific proteins for degradation through the ubiquitin-proteasome pathway. Mutations cause autosomal recessive developmental delay with intellectual disability, seizures, and movement disorders. The gene shows moderate constraint against loss-of-function variants, suggesting some tolerance to haploinsufficiency.

OMIMResearchSummary from RefSeq, UniProt
DNmechanismLOEUF 1.10
Clinical SummaryFBXL6
Population Constraint (gnomAD)
Low constraint (pLI 0.00) — loss-of-function variants are relatively tolerated in the population.

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

Tolerant — LoF & missense variants common in population
LoF Constraint
1.10LOEUF
pLI 0.000
Z-score 1.19
OE 0.73 (0.491.10)
Tolerant

Highly tolerant — LoF variants common in population

Missense Constraint
-1.08Z-score
OE missense 1.18 (1.081.29)
329 obs / 278.4 exp
Tolerant

Tolerant to missense variation

Observed / Expected Ratios
LoF OE0.73 (0.491.10)
00.351.4
Missense OE1.18 (1.081.29)
00.61.4
Synonymous OE1.42
01.21.6
LoF obs/exp: 16 / 22.0Missense obs/exp: 329 / 278.4Syn Z: -3.70
DN
0.6162th %ile
GOF
0.5562th %ile
LOF
0.4038th %ile

The highest-scoring mechanism for this gene is dominant-negative.

DNprediction 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

FBXL6 · 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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