rs137852971

Positions:

chr11-62692413-C-G

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2PP3_ModeratePP5_Moderate

The NM_001122955.4(BSCL2):c.826G>C(p.Ala276Pro) variant causes a missense change. The variant allele was found at a frequency of 0.00000372 in 1,614,060 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000034 ( 0 hom. )

Consequence

BSCL2
NM_001122955.4 missense

Scores

Clinical Significance

Pathogenic criteria provided, single submitter P:2U:1O:1

Conservation

PhyloP100: 4.96

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:49189): (HNRNPUL2-BSCL2 readthrough (NMD candidate)) This locus represents naturally occurring read-through transcription between the neighboring HNRNPUL2 (heterogeneous nuclear ribonucleoprotein U-like 2) and BSCL2 (Berardinelli-Seip congenital lipodystrophy 2 (seipin)) genes on chromosome 11. The read-through transcript is a candidate for nonsense-mediated mRNA decay (NMD), and is unlikely to produce a protein product. [provided by RefSeq, Mar 2011]

HNRNPUL2-BSCL2 links:

BSCL2 (HGNC:):

BSCL2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.883

PP5

Variant 11-62692413-C-G is Pathogenic according to our data. Variant chr11-62692413-C-G is described in ClinVar as [Pathogenic]. Clinvar id is 4539.Status of the report is criteria_provided_single_submitter, 1 stars. Variant chr11-62692413-C-G is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BSCL2	NM_001122955.4 linkuse as main transcript	c.826G>C	p.Ala276Pro	missense_variant	6/11	ENST00000360796.10	NP_001116427.1	Q96G97-4A0A024R540

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
BSCL2	ENST00000360796.10 linkuse as main transcript	c.826G>C	p.Ala276Pro	missense_variant	6/11	1	NM_001122955.4	ENSP00000354032.5	Q96G97-4
HNRNPUL2-BSCL2	ENST00000403734.2 linkuse as main transcript	n.*877G>C		non_coding_transcript_exon_variant	19/24	2		ENSP00000456010.1	H3BQZ7
HNRNPUL2-BSCL2	ENST00000403734.2 linkuse as main transcript	n.*877G>C		3_prime_UTR_variant	19/24	2		ENSP00000456010.1	H3BQZ7

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152202

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251334

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135836

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

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:

0.00000880

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000342

AC:

AN:

1461858

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727222

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

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:

0.00000450

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152202

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74360

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:2Uncertain:1Other:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Congenital generalized lipodystrophy type 2

Pathogenic:1Other:1

Pathogenic, no assertion criteria provided	literature only	OMIM	Aug 01, 2001	- -
not provided, no classification provided	literature only	GeneReviews	-	- -

Charcot-Marie-Tooth disease type 2

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jul 12, 2023

Experimental studies have shown that this missense change affects BSCL2 function (PMID: 23989774). This sequence change replaces alanine, which is neutral and non-polar, with proline, which is neutral and non-polar, at codon 212 of the BSCL2 protein (p.Ala212Pro). This variant is present in population databases (rs137852971, gnomAD 0.0009%). This missense change has been observed in individual(s) with autosomal recessive Berardinelli-Seip congenital lipodystrophy (PMID: 11479539, 12362029). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 4539). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt BSCL2 protein function. For these reasons, this variant has been classified as Pathogenic. -

Berardinelli-Seip congenital lipodystrophy

Uncertain:1

Uncertain significance, no assertion criteria provided

literature only

Inherited Neuropathy Consortium Ii, University Of Miami

Jan 06, 2016

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.43

BayesDel_noAF

Pathogenic

0.38

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.82

.;.;.;D;D;D;D;.

Eigen

Pathogenic

0.81

Eigen_PC

Pathogenic

0.76

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.93

D;D;D;D;.;.;D;D

M_CAP

Uncertain

0.29

MetaRNN

Pathogenic

0.88

D;D;D;D;D;D;D;D

MetaSVM

Pathogenic

1.1

MutationAssessor

Uncertain

2.9

.;M;.;.;M;M;M;.

PrimateAI

Uncertain

0.49

PROVEAN

Uncertain

-4.3

D;D;D;D;D;D;D;D

REVEL

Pathogenic

0.88

Sift

Uncertain

0.0020

D;D;D;D;D;D;D;D

Sift4G

Uncertain

0.010

D;D;D;D;D;D;D;.

Polyphen

1.0

.;D;.;.;D;D;D;.

Vest4

0.97

MutPred

0.72

.;Gain of loop (P = 0.0013);.;.;Gain of loop (P = 0.0013);Gain of loop (P = 0.0013);Gain of loop (P = 0.0013);Gain of loop (P = 0.0013);

MVP

0.99

ClinPred

0.97

GERP RS

5.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.91

gMVP

0.98

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

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