Variant 11-62690369-AGGAACTAGAGCAGGTGGGGCGCTGTC-A details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PVS1_ModeratePM2PP5_Moderate

The NM_001122955.4(BSCL2):c.1361_1386del(p.Arg454LeufsTer16) variant causes a frameshift change. The variant allele was found at a frequency of 0.00000684 in 1,461,756 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Pathogenic (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000068 ( 0 hom. )

Consequence

BSCL2
NM_001122955.4 frameshift

Scores

Not classified

Clinical Significance

Pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 4.89

Variant links:

Genes affected

BSCL2 (HGNC:15832): (BSCL2 lipid droplet biogenesis associated, seipin) This gene encodes the multi-pass transmembrane protein protein seipin. This protein localizes to the endoplasmic reticulum and may be important for lipid droplet morphology. Mutations in this gene have been associated with congenital generalized lipodystrophy type 2 or Berardinelli-Seip syndrome, a rare autosomal recessive disease characterized by a near absence of adipose tissue and severe insulin resistance. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. Naturally occurring read-through transcription occurs between this locus and the neighboring locus HNRNPUL2 (heterogeneous nuclear ribonucleoprotein U-like 2).[provided by RefSeq, Mar 2011]

BSCL2 links:

HNRNPUL2-BSCL2 (HGNC:):

HNRNPUL2-BSCL2 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 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. Fraction of 0.0202 CDS is truncated, and there are 2 pathogenic variants in the truncated region.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 11-62690369-AGGAACTAGAGCAGGTGGGGCGCTGTC-A is Pathogenic according to our data. Variant chr11-62690369-AGGAACTAGAGCAGGTGGGGCGCTGTC-A is described in ClinVar as [Pathogenic]. Clinvar id is 947075.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BSCL2	NM_001122955.4 linkuse as main transcript	c.1361_1386del	p.Arg454LeufsTer16	frameshift_variant	11/11	ENST00000360796.10
HNRNPUL2-BSCL2	NR_037946.1 linkuse as main transcript	n.3881_3906del		non_coding_transcript_exon_variant	24/24

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
BSCL2	ENST00000360796.10 linkuse as main transcript	c.1361_1386del	p.Arg454LeufsTer16	frameshift_variant	11/11	1	NM_001122955.4	A2	Q96G97-4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000239

AC:

AN:

251424

Hom.:

AF XY:

0.0000147

AC XY:

AN XY:

135892

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000173

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000684

AC:

AN:

1461756

Hom.:

AF XY:

0.00000550

AC XY:

AN XY:

727190

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000936

Hom.:

Bravo

AF:

0.0000189

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Charcot-Marie-Tooth disease type 2

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 25, 2023

This sequence change results in a frameshift in the BSCL2 gene (p.Arg390Leufs*16). While this is not anticipated to result in nonsense mediated decay, it is expected to disrupt the last 9 amino acid(s) of the BSCL2 protein and extend the protein by 6 additional amino acid residues. This variant is present in population databases (rs779154593, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with BSCL2-related conditions. ClinVar contains an entry for this variant (Variation ID: 947075). This variant disrupts a region of the BSCL2 protein in which other variant(s) (p.Gln391*) have been determined to be pathogenic (PMID: 19226263, 24024128). 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

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over