rs149466797

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 2P and 3B. PM2BP4_ModerateBP6

The NM_001122955.4(BSCL2):c.1367G>A(p.Arg456His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000271 in 1,613,872 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. R456R) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.00018 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00028 ( 1 hom. )

Consequence

BSCL2
NM_001122955.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:6B:2O:1

Conservation

PhyloP100: 2.44

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 Likely_benign. Variant got -1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.13074535).

BP6

Variant 11-62690389-C-T is Benign according to our data. Variant chr11-62690389-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 193938.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=6, Likely_benign=2, Uncertain_risk_allele=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
BSCL2	NM_001122955.4 linkuse as main transcript	c.1367G>A	p.Arg456His	missense_variant	11/11	ENST00000360796.10
HNRNPUL2-BSCL2	NR_037946.1 linkuse as main transcript	n.3887G>A		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.1367G>A	p.Arg456His	missense_variant	11/11	1	NM_001122955.4	A2	Q96G97-4

Frequencies

GnomAD3 genomes

AF:

0.000178

AC:

AN:

152104

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00110

Gnomad AMR

AF:

0.000720

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000415

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000176

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000322

AC:

AN:

251404

Hom.:

AF XY:

0.000419

AC XY:

AN XY:

135884

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000260

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00114

Gnomad FIN exome

AF:

0.000139

Gnomad NFE exome

AF:

0.000290

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000280

AC:

410

AN:

1461768

Hom.:

Cov.:

AF XY:

0.000347

AC XY:

252

AN XY:

727188

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.000403

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000823

Gnomad4 FIN exome

AF:

0.000187

Gnomad4 NFE exome

AF:

0.000260

Gnomad4 OTH exome

AF:

0.000248

GnomAD4 genome

AF:

0.000178

AC:

AN:

152104

Hom.:

Cov.:

AF XY:

0.000229

AC XY:

AN XY:

74294

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000720

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000415

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000176

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000314

Hom.:

Bravo

AF:

0.000302

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.000329

AC:

EpiCase

AF:

0.000327

EpiControl

AF:

0.000474

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:6Benign:2Other:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:4

Uncertain significance, criteria provided, single submitter	clinical testing	Athena Diagnostics	Mar 11, 2020	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	May 11, 2018	A variant of uncertain significance has been identified in the BSCL2 gene. The R392H variant has not been published as a pathogenic variant, nor has it been reported as a benign variant to our knowledge. This variant is observed in 32/30780 (0.1%) alleles from individuals of South Asian background in large population cohorts (Lek et al., 2016). The R392H variant is a conservative amino acid substitution, which is not likely to impact secondary protein structure as these residues share similar properties. However, in-silico analyses, including protein predictors and evolutionary conservation, support a deleterious effect. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic variant or a rare benign variant. -
Uncertain significance, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Jun 04, 2019	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Nov 18, 2014	- -

Hereditary spastic paraplegia

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genome Diagnostics Laboratory, The Hospital for Sick Children

Sep 01, 2021

- -

Monogenic diabetes

Uncertain:1

Uncertain significance, criteria provided, single submitter

research

Personalized Diabetes Medicine Program, University of Maryland School of Medicine

Dec 04, 2015

ACMG Criteria: PP3 -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

May 10, 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

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Dec 21, 2023

- -

Congenital generalized lipodystrophy type 2

Other:1

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 rs149466797 of Congenital Generalized Lipodystrophy type 2 remains uncertain -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.088

BayesDel_addAF

Benign

-0.062

BayesDel_noAF

Uncertain

0.080

Cadd

Pathogenic

Dann

Uncertain

1.0

Eigen

Uncertain

0.31

Eigen_PC

Uncertain

0.38

FATHMM_MKL

Uncertain

0.82

LIST_S2

Benign

0.85

D;D;D;T;.;.;D

M_CAP

Uncertain

0.20

MetaRNN

Benign

0.13

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

MetaSVM

Uncertain

0.68

MutationTaster

Benign

0.68

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

PrimateAI

Benign

0.46

PROVEAN

Pathogenic

-5.0

D;N;N;N;N;N;N

REVEL

Uncertain

0.58

Sift

Pathogenic

0.0

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

Sift4G

Pathogenic

0.0

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

Polyphen

0.81

.;.;.;.;P;P;P

Vest4

0.39, 0.37, 0.39, 0.39, 0.38

MVP

0.94

ClinPred

0.17

GERP RS

5.5

Varity_R

0.21

gMVP

0.36

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