11-62690404-C-G

Variant names:

• chr11-62690404-C-G
• rs779952369
• NM_001122955.4:c.1352G>C

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_001122955.4(BSCL2):​c.1352G>C​(p.Gly451Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000103 in 1,461,842 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000010 (0 hom.)
• Consequence: BSCL2 NM_001122955.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.162
• Publications: 0 publications found

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]

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]

ACMG classification

Our verdict: Likely_benign. The variant received -2 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.116747856).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001122955.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BSCL2	NM_001122955.4	MANE Select	c.1352G>C	p.Gly451Ala	missense	Exon 11 of 11	NP_001116427.1	Q96G97-4
	BSCL2	NM_001386027.1		c.1358G>C	p.Gly453Ala	missense	Exon 12 of 12	NP_001372956.1	J3KQ12
	BSCL2	NM_001386028.1		c.1352G>C	p.Gly451Ala	missense	Exon 12 of 12	NP_001372957.1	Q96G97-4

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	BSCL2	ENST00000360796.10	TSL:1 MANE Select	c.1352G>C	p.Gly451Ala	missense	Exon 11 of 11	ENSP00000354032.5	Q96G97-4
	BSCL2	ENST00000405837.5	TSL:1	c.1358G>C	p.Gly453Ala	missense	Exon 12 of 12	ENSP00000385332.1	J3KQ12
	BSCL2	ENST00000407022.7	TSL:1	c.1160G>C	p.Gly387Ala	missense	Exon 11 of 11	ENSP00000384080.3	Q96G97-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251368 AF XY: 0.00000736

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 FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000880

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000103 AC: 15 AN: 1461842 Hom.: 0 Cov.: 32 AF XY: 0.0000124 AC XY: 9 AN XY: 727218

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86250

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53412

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5742

European-Non Finnish (NFE) AF: 0.0000135 AC: 15 AN: 1112010

Other (OTH) AF: 0.00 AC: 0 AN: 60390

GnomAD4 genome Cov.: 32

TwinsUK AF: 0.00 AC: 0

ALSPAC AF: 0.000259 AC: 1

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Charcot-Marie-Tooth disease type 2 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.066
BayesDel_addAF	Uncertain	0.017	T
BayesDel_noAF	Benign	-0.21
CADD	Benign	10
DANN	Benign	0.93
DEOGEN2	Benign	0.020	T
Eigen	Benign	-0.83
Eigen_PC	Benign	-0.85
FATHMM_MKL	Benign	0.042	N
LIST_S2	Benign	0.84	T
M_CAP	Benign	0.063	D
MetaRNN	Benign	0.12	T
MetaSVM	Uncertain	-0.11	T
MutationAssessor	Benign	1.9	L
PhyloP100		0.16
PrimateAI	Benign	0.44	T
PROVEAN	Uncertain	-3.9	D
REVEL	Benign	0.095
Sift	Benign	0.076	T
Sift4G	Pathogenic	0.0	D
Polyphen		0.037	B
Vest4		0.14
MutPred		0.17		Loss of loop (P = 0.0073)
MVP		0.78
ClinPred		0.071	T
GERP RS		2.0
Varity_R		0.057
gMVP		0.16
Mutation Taster		=86/14	polymorphism

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

Other links and lift over

dbSNP: rs779952369; hg19: chr11-62457876;