rs1173504533
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Variant summary
Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong
The NM_152618.3(BBS12):βc.270delβ(p.Val92LeufsTer20) variant causes a frameshift change. The variant allele was found at a frequency of 0.00000342 in 1,461,674 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (β β ). Synonymous variant affecting the same amino acid position (i.e. F90F) has been classified as Likely benign.
Frequency
Genomes: not found (cov: 33)
Exomes π: 0.0000034 ( 0 hom. )
Consequence
BBS12
NM_152618.3 frameshift
NM_152618.3 frameshift
Scores
Not classified
Clinical Significance
Conservation
PhyloP100: 5.34
Genes affected
BBS12 (HGNC:26648): (Bardet-Biedl syndrome 12) The protein encoded by this gene is part of a complex that is involved in membrane trafficking. The encoded protein is a molecular chaperone that aids in protein folding upon ATP hydrolysis. This protein also plays a role in adipocyte differentiation. Defects in this gene are a cause of Bardet-Biedl syndrome type 12. Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, May 2010]
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ACMG classification
Classification made for transcript
Verdict is Pathogenic. Variant got 18 ACMG points.
PVS1
?
Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 99 pathogenic variants in the truncated region.
PM2
?
Very rare variant in population databases, with high coverage;
PP5
?
Variant 4-122742159-GT-G is Pathogenic according to our data. Variant chr4-122742159-GT-G is described in ClinVar as [Likely_pathogenic]. Clinvar id is 555873.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
BBS12 | NM_152618.3 | c.270del | p.Val92LeufsTer20 | frameshift_variant | 2/2 | ENST00000314218.8 | |
BBS12 | NM_001178007.2 | c.270del | p.Val92LeufsTer20 | frameshift_variant | 3/3 | ||
BBS12 | XM_011531680.3 | c.270del | p.Val92LeufsTer20 | frameshift_variant | 2/2 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
BBS12 | ENST00000314218.8 | c.270del | p.Val92LeufsTer20 | frameshift_variant | 2/2 | 1 | NM_152618.3 | P1 | |
BBS12 | ENST00000542236.5 | c.270del | p.Val92LeufsTer20 | frameshift_variant | 3/3 | 2 | P1 | ||
BBS12 | ENST00000433287.1 | c.270del | p.Val92LeufsTer20 | frameshift_variant | 3/3 | 2 |
Frequencies
GnomAD3 genomes ? Cov.: 33
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GnomAD3 exomes AF: 0.00000400 AC: 1AN: 250296Hom.: 0 AF XY: 0.00000738 AC XY: 1AN XY: 135492
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GnomAD4 exome AF: 0.00000342 AC: 5AN: 1461674Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2AN XY: 727112
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GnomAD4 genome ? Cov.: 33
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ClinVar
Significance: Pathogenic/Likely pathogenic
Submissions summary: Pathogenic:3
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Bardet-Biedl syndrome 12 Pathogenic:2
Pathogenic, criteria provided, single submitter | clinical testing | Baylor Genetics | Mar 12, 2024 | - - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Counsyl | Jan 02, 2018 | - - |
Bardet-Biedl syndrome Pathogenic:1
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Sep 03, 2023 | ClinVar contains an entry for this variant (Variation ID: 555873). This variant is also known as 268delT. This premature translational stop signal has been observed in individual(s) with Bardet-Biedl syndrome (PMID: 17160889). This variant is present in population databases (no rsID available, gnomAD 0.002%). This sequence change creates a premature translational stop signal (p.Val92Leufs*20) in the BBS12 gene. While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 619 amino acid(s) of the BBS12 protein. This variant disrupts a region of the BBS12 protein in which other variant(s) (p.Asp687Valfs*3) have been determined to be pathogenic (Invitae). This suggests that this is a clinically significant region of the protein, and that variants that disrupt it are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. - |
Computational scores
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at