BBS4

Chr 15

Bardet-Biedl syndrome 4

This gene is a member of the Bardet-Biedl syndrome (BBS) gene family. Bardet-Biedl syndrome is an autosomal recessive disorder characterized by severe pigmentary retinopathy, obesity, polydactyly, renal malformation and cognitive disability. The proteins encoded by BBS gene family members are structurally diverse. The similar phenotypes exhibited by mutations in BBS gene family members are likely due to the protein's shared roles in cilia formation and function. Many BBS proteins localize to the basal bodies, ciliary axonemes, and pericentriolar regions of cells. BBS proteins may also be involved in intracellular trafficking via microtubule-related transport. The protein encoded by this gene has sequence similarity to O-linked N-acetylglucosamine (O-GlcNAc) transferases in plants and archaebacteria and in human forms a multi-protein "BBSome" complex with seven other BBS proteins. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Mar 2016]

GeneReviewsResearchGenerating clinical summary…

Primary Disease Associations & Inheritance

UniProtBardet-Biedl syndrome 4

Clinical highlights

Interpreting a novel variant
Loss of function is the curated mechanism (Gene2Phenotype), though the gene is not strongly LoF-constrained in the population — weigh truncating variants against that tolerance.Curated gene-level mechanism — a prior for triage, not a per-variant call.
0
Active trials
9
Pubs (1 yr)
—
P/LP submissions
—
P/LP missense
1.18
LOEUF
LOF
Mechanism· G2P
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GeneReview available — BBS4
Authoritative clinical overview · Recommended first read
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Some data sources returned errors (1)

omim: Error: OMIM fetch failed: 429

Population Genetics & Constraint

gnomAD v4 — loss-of-function & missense intolerance

Tolerant — LoF & missense variants common in population
LoF Constraint?
1.18LOEUF
pLI 0.000
Z-score 0.74
OE 0.86 (0.63–1.18)
Tolerant

Highly tolerant — LoF variants common in population

Missense Constraint?
-0.96Z-score
OE missense 1.17 (1.06–1.28)
301 obs / 257.8 exp
Tolerant

Tolerant to missense variation

Observed / Expected Ratios?
LoF OE?0.86 (0.63–1.18)
0≤0.351.4
Missense OE?1.17 (1.06–1.28)
0≤0.61.4
Synonymous OE?1.16
0≤1.21.6
LoF obs/exp: 27 / 31.5Missense obs/exp: 301 / 257.8Syn Z: -1.25

ClinVar Variant Classifications

0 submitted variants in ClinVar

Protein Context — Lollipop Plot

BBS4 · protein map & ClinVar variants

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

Clinical Trials

Active and recruiting trials from ClinicalTrials.gov

No active trials found for this gene.

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Trials that enrol by condition rarely name the gene: BBS4-related ciliopathy