rs147314661

Variant names:

Your query was ambiguous. Multiple possible variants found:

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP6

The NM_001122955.4(BSCL2):c.299G>T(p.Cys100Phe) variant causes a missense change. The variant allele was found at a frequency of 0.0000366 in 1,614,106 control chromosomes in the GnomAD database, including 1 homozygotes. 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. C100Y) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00021 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000018 ( 1 hom. )

Consequence

BSCL2
NM_001122955.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:4B:1

Conservation

PhyloP100: 6.65

Publications

0 publications found

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:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

BP6

Variant 11-62705406-C-A is Benign according to our data. Variant chr11-62705406-C-A is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 246509.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
BSCL2	NM_001122955.4 link	c.299G>T	p.Cys100Phe	missense_variant	Exon 2 of 11	ENST00000360796.10	NP_001116427.1	Q96G97-4A0A024R540

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
BSCL2	ENST00000360796.10 link	c.299G>T	p.Cys100Phe	missense_variant	Exon 2 of 11	1	NM_001122955.4	ENSP00000354032.5	Q96G97-4
HNRNPUL2-BSCL2	ENST00000403734.2 link	n.*350G>T		non_coding_transcript_exon_variant	Exon 15 of 24	2		ENSP00000456010.1	H3BQZ7
HNRNPUL2-BSCL2	ENST00000403734.2 link	n.*350G>T		3_prime_UTR_variant	Exon 15 of 24	2		ENSP00000456010.1	H3BQZ7

Frequencies

GnomAD3 genomes

AF:

0.000210

AC:

AN:

152228

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00177

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:

0.00

Gnomad OTH

AF:

0.00144

GnomAD2 exomes

AF:

0.0000119

AC:

AN:

251270

AF XY:

0.0000147

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.0000185

AC:

AN:

1461878

Hom.:

Cov.:

AF XY:

0.0000220

AC XY:

AN XY:

727238

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.000402

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1112000

Other (OTH)

AF:

0.000149

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.491

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.000210

AC:

AN:

152228

Hom.:

Cov.:

AF XY:

0.000229

AC XY:

AN XY:

74374

show subpopulations

African (AFR)

AF:

0.0000482

AC:

AN:

41464

American (AMR)

AF:

0.00177

AC:

AN:

15278

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5204

South Asian (SAS)

AF:

0.00

AC:

AN:

4836

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68034

Other (OTH)

AF:

0.00144

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.483

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.000506

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:4Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Apr 27, 2021

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.107G>T (p.C36F) alteration is located in exon 2 (coding exon 1) of the BSCL2 gene. This alteration results from a G to T substitution at nucleotide position 107, causing the cysteine (C) at amino acid position 36 to be replaced by a phenylalanine (F). The heterozygous missense change is ultra rare in population databases:_x000D_ _x000D_ Based on data from the Genome Aggregation Database (gnomAD), the BSCL2 c.107G>T alteration was observed in <0.001% (2/277,084). A similar amino acid change has been observed in an affected individual: _x000D_ _x000D_ A similar missense change affecting the same amino acid c.107G>A (p.C36Y) was reported in a patient with spastic paraplegia mild mental retardation, and no amyotrophy (Ishiura, 2014). The altered amino acid is conserved throughout evolution:_x000D_ _x000D_ The p.C36 amino acid is highly conserved in available vertebrate species. In silico prediction is conflicting:_x000D_ _x000D_ The p.C36F alteration is predicted to be possibly damaging by Polyphen and tolerated by SIFT in silico analyses. Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

BSCL2-related disorder

Uncertain:1

Dec 06, 2023

PreventionGenetics, part of Exact Sciences

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

The BSCL2 c.299G>T variant is predicted to result in the amino acid substitution p.Cys100Phe. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.0085% of alleles in individuals of Latino descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Charcot-Marie-Tooth disease type 2

Uncertain:1

Dec 16, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces cysteine, which is neutral and slightly polar, with phenylalanine, which is neutral and non-polar, at codon 36 of the BSCL2 protein (p.Cys36Phe). This variant is present in population databases (rs147314661, gnomAD no frequency). 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: 246509). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt BSCL2 protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

not provided

Uncertain:1

Mar 11, 2025

GeneDx

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 18790819) -

Congenital generalized lipodystrophy type 2;C2931276:Hereditary spastic paraplegia 17;C4014700:Severe neurodegenerative syndrome with lipodystrophy;C5436838:Neuronopathy, distal hereditary motor, type 5C

Benign:1

Feb 13, 2024

Fulgent Genetics, Fulgent Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.34

BayesDel_addAF

Pathogenic

0.43

BayesDel_noAF

Pathogenic

0.37

CADD

Pathogenic

(source)

DANN

Benign

0.95

DEOGEN2

Uncertain

0.53

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

Eigen

Uncertain

0.22

Eigen_PC

Uncertain

0.30

FATHMM_MKL

Uncertain

0.97

LIST_S2

Benign

0.83

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

M_CAP

Uncertain

0.12

MetaRNN

Uncertain

0.69

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

MetaSVM

Uncertain

0.072

MutationAssessor

Benign

0.69

.;N;.;N;N;N;.;.;.;.

PhyloP100

6.7

PrimateAI

Uncertain

0.68

PROVEAN

Uncertain

-3.9

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

REVEL

Pathogenic

0.69

Sift

Benign

0.051

T;T;T;T;T;T;T;T;T;D

Sift4G

Benign

0.084

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

Polyphen

0.37, 0.96

.;B;.;D;D;D;.;.;.;.

Vest4

0.85

MVP

0.94

ClinPred

0.85

GERP RS

5.0

Varity_R

0.64

gMVP

0.62

Mutation Taster

=25/75

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over