rs185341934

Positions:

chr11-62692394-G-A

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 1P and 13B. PP3BP4_StrongBP6BS1BS2

The NM_001122955.4(BSCL2):c.845C>T(p.Ala282Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000595 in 1,614,176 control chromosomes in the GnomAD database, including 11 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A282T) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0011 ( 4 hom., cov: 32)

Exomes 𝑓: 0.00054 ( 7 hom. )

Consequence

BSCL2
NM_001122955.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications B:12O:1

Conservation

PhyloP100: 8.36

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -12 ACMG points.

PP3

Multiple lines of computational evidence support a deleterious effect 7: AlphaMissense, Cadd, Dann, Eigen, MutationAssessor, phyloP100way_vertebrate, REVEL [when BayesDel_addAF, max_spliceai, FATHMM_MKL, MetaRNN, MutationTaster was below the threshold]

BP4

Computational evidence support a benign effect (MetaRNN=0.01549226).

BP6

Variant 11-62692394-G-A is Benign according to our data. Variant chr11-62692394-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 305177.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=5, Uncertain_risk_allele=1, Benign=6}.

BS1

Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.00111 (169/152316) while in subpopulation EAS AF= 0.00869 (45/5180). AF 95% confidence interval is 0.00667. There are 4 homozygotes in gnomad4. There are 86 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 4 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
BSCL2	NM_001122955.4 linkuse as main transcript	c.845C>T	p.Ala282Val	missense_variant	6/11	ENST00000360796.10	NP_001116427.1
HNRNPUL2-BSCL2	NR_037946.1 linkuse as main transcript	n.3365C>T		non_coding_transcript_exon_variant	19/24

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
BSCL2	ENST00000360796.10 linkuse as main transcript	c.845C>T	p.Ala282Val	missense_variant	6/11	1	NM_001122955.4	ENSP00000354032	A2	Q96G97-4

Frequencies

GnomAD3 genomes

AF:

0.00110

AC:

168

AN:

152198

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000314

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00674

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00867

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00287

GnomAD3 exomes

AF:

0.00181

AC:

455

AN:

251320

Hom.:

AF XY:

0.00135

AC XY:

183

AN XY:

135844

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.00905

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00652

Gnomad SAS exome

AF:

0.000196

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000440

Gnomad OTH exome

AF:

0.00147

GnomAD4 exome

AF:

0.000542

AC:

792

AN:

1461860

Hom.:

Cov.:

AF XY:

0.000477

AC XY:

347

AN XY:

727232

show subpopulations

Gnomad4 AFR exome

AF:

0.000149

Gnomad4 AMR exome

AF:

0.00948

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00617

Gnomad4 SAS exome

AF:

0.000220

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000216

Gnomad4 OTH exome

AF:

0.00124

GnomAD4 genome

AF:

0.00111

AC:

169

AN:

152316

Hom.:

Cov.:

AF XY:

0.00115

AC XY:

AN XY:

74482

show subpopulations

Gnomad4 AFR

AF:

0.000313

Gnomad4 AMR

AF:

0.00680

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00869

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00284

Alfa

AF:

0.000570

Hom.:

Bravo

AF:

0.00207

ExAC

AF:

0.00165

AC:

200

Asia WGS

AF:

0.00318

AC:

AN:

3478

EpiCase

AF:

0.000109

EpiControl

AF:

0.000119

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Benign:12Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Benign:5

Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Jun 22, 2022	- -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 03, 2015	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Apr 01, 2022	BSCL2: PP3, BS1 -
Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Likely benign, criteria provided, single submitter	clinical testing	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics	Sep 06, 2017	- -

Congenital generalized lipodystrophy type 2

Benign:1Other:1

Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -
Uncertain risk allele, criteria provided, single submitter	research	Clinical Genomics, Uppaluri K&H Personalized Medicine Clinic	-	Potent mutations in BSCL2 gene are associated with Congenital generalized lipodystrophy, type 2, which can present with insulin resistance, fatty liver and diabetes.However, the role of this particular variant rs185341934 of Congenital Generalized Lipodystrophy type 2 remains uncertain -

not specified

Benign:1

Benign, criteria provided, single submitter

clinical testing

Athena Diagnostics

May 24, 2017

- -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 08, 2022

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Charcot-Marie-Tooth disease type 2

Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 27, 2024

- -

BSCL2-related disorder

Benign:1

Benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jul 30, 2019

This variant is classified as benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Monogenic diabetes

Benign:1

Likely benign, criteria provided, single submitter

research

Personalized Diabetes Medicine Program, University of Maryland School of Medicine

Jan 02, 2017

ACMG criteria: PP3 (9 predictors), BS2 (3 homozygotes in Latinos), BP6 (InVitae and Athena call it benign)=Likely benign -

Neuronopathy, distal hereditary motor, type 5A

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.94

BayesDel_addAF

Benign

-0.13

BayesDel_noAF

Uncertain

0.050

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Pathogenic

0.86

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

Eigen

Pathogenic

0.74

Eigen_PC

Uncertain

0.65

FATHMM_MKL

Pathogenic

1.0

LIST_S2

Pathogenic

0.98

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

MetaRNN

Benign

0.015

T;T;T;T;T;T;T;T

MetaSVM

Uncertain

0.73

MutationAssessor

Pathogenic

3.0

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

MutationTaster

Benign

1.0

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

PrimateAI

Uncertain

0.71

PROVEAN

Uncertain

-4.0

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

REVEL

Pathogenic

0.78

Sift

Pathogenic

0.0

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

Sift4G

Pathogenic

0.0

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

Polyphen

1.0

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

Vest4

0.97

MVP

0.95

ClinPred

0.083

GERP RS

4.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.74

gMVP

0.76

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