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Intellectual disability - microarray and sequencing v5.370 FBXW11 Sarah Leigh Phenotypes for gene: FBXW11 were changed from Global developmental delay; Intellectual disability; Abnormality of the eye; Abnormality of the head; Abnormality of digit; Neurodevelopmental, jaw, eye, and digital syndrome MIM#618914 to Neurodevelopmental, jaw, eye, and digital syndrome, OMIM:618914; neurodevelopmental, jaw, eye, and digital syndrome, MONDO:003005
Intellectual disability - microarray and sequencing v3.172 FBXW11 Eleanor Williams Added comment: Comment on phenotypes: Added disease association which has been added in OMIM.
Intellectual disability - microarray and sequencing v3.172 FBXW11 Eleanor Williams Phenotypes for gene: FBXW11 were changed from Global developmental delay; Intellectual disability; Abnormality of the eye; Abnormality of the head; Abnormality of digit to Global developmental delay; Intellectual disability; Abnormality of the eye; Abnormality of the head; Abnormality of digit; Neurodevelopmental, jaw, eye, and digital syndrome MIM#618914
Intellectual disability - microarray and sequencing v2.1065 FBXW11 Catherine Snow Classified gene: FBXW11 as Green List (high evidence)
Intellectual disability - microarray and sequencing v2.1065 FBXW11 Catherine Snow Gene: fbxw11 has been classified as Green List (High Evidence).
Intellectual disability - microarray and sequencing v2.1064 FBXW11 Catherine Snow reviewed gene: FBXW11: Rating: GREEN; Mode of pathogenicity: None; Publications: 31402090, 16865294; Phenotypes: ; Mode of inheritance: MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Intellectual disability - microarray and sequencing v2.1015 FBXW11 Konstantinos Varvagiannis gene: FBXW11 was added
gene: FBXW11 was added to Intellectual disability. Sources: Literature
Mode of inheritance for gene: FBXW11 was set to MONOALLELIC, autosomal or pseudoautosomal, imprinted status unknown
Publications for gene: FBXW11 were set to 31402090
Phenotypes for gene: FBXW11 were set to Global developmental delay; Intellectual disability; Abnormality of the eye; Abnormality of the head; Abnormality of digit
Penetrance for gene: FBXW11 were set to unknown
Review for gene: FBXW11 was set to GREEN
Added comment: Holt et al. (2019 - PMID: 31402090) report on 7 unrelated individuals with de novo FBXW11 variants.

Features included DD (6/7), ID (6/7 - severity relevant to the current panel in most cases), eye, digital, jaw anomalies, etc. There was some overlap with the phenotype of a 1.24-Mb 5q35.1 microduplication spanning FBXW11 and 6 additional genes (Koolen et al, 2006 - PMID: 16865294).

FBXW11 encodes an F-box protein part of the Skp1-cullin-F-box (SCF) ubiquitin ligase complex, involved in ubiquitination and proteasomal degratation. The SCF complex functions as a regulator of Wnt/β-catenin, Hh (and possibly RAS) signalling pathways.

Each individual harbored a private missense variant as a de novo event. Alternative diagnoses (eg. Noonan syndrome in the case of a suggestive phenotype) were ruled out to the extent possible.

All 7 variants localized in regions depleted for nonsynonymous variation (constrained coding regions) at the tips of loops of the WD repeat domains and were presumed to lead to destabilization of the protein and/or its interactions. Given the clustering a gain-of-function or dominant-negative effect of these variants might be suggested. [In gnomAD FBXW11 has a Z score = 3.96 for missense variants / pLI = 0.98].

In situ hybridization on human embryo sections demonstrated expression in the developping eye, hand, brain and mandibular process.

Relevant expression patterns were also observed for the 2 zebrafish orthologs of FBXW11, fbxw11a/b. Generated zebrafish homozygous for a frameshift fbxw11b frameshift variant demonstrated relevant phenotypes upon additional injection of a fbxw11a morpholino (abnormal pectoral fins, heart edema, smaller eyes, abnormal jaw development).

FBXW11 is not associated with any phenotype in OMIM/G2P.

As a result, this gene can be considered for inclusion in the ID panel as green (sufficient cases, expression, phenotype in zebrafish model, etc.) or amber.
Sources: Literature