Variant chr5-54455791-T-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 8P and 4B. PVS1BS2

The NM_006308.3(HSPB3):c.2T>C(p.Met1?) variant causes a start lost change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000137 in 1,461,648 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 Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000014 ( 0 hom. )

Consequence

HSPB3
NM_006308.3 start_lost

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.39

Variant links:

Genes affected

HSPB3 (HGNC:5248): (heat shock protein family B (small) member 3) This gene encodes a muscle-specific small heat shock protein. A mutation in this gene is the cause of autosomal dominant distal hereditary motor neuropathy type 2C.[provided by RefSeq, Sep 2010]

HSPB3 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PVS1

Start lost variant, no new inframe start found.

BS2

High AC in GnomAdExome4 at 20 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
HSPB3	NM_006308.3 linkuse as main transcript	c.2T>C	p.Met1?	start_lost	1/1	ENST00000302005.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
HSPB3	ENST00000302005.3 linkuse as main transcript	c.2T>C	p.Met1?	start_lost	1/1		NM_006308.3	P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000796

AC:

AN:

251172

Hom.:

AF XY:

0.0000442

AC XY:

AN XY:

135746

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000578

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000137

AC:

AN:

1461648

Hom.:

Cov.:

AF XY:

0.00000688

AC XY:

AN XY:

727142

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000447

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000680

Hom.:

Bravo

AF:

0.0000378

ExAC

AF:

0.0000988

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Neuronopathy, distal hereditary motor, type 2C

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 20, 2023

This sequence change affects the initiator methionine of the HSPB3 mRNA. The next in-frame methionine is located at codon 104. This variant is present in population databases (rs769845878, gnomAD 0.06%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with HSPB3-related conditions. ClinVar contains an entry for this variant (Variation ID: 1019333). 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Uncertain

0.11

BayesDel_noAF

Pathogenic

0.27

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.065

Eigen

Uncertain

0.32

Eigen_PC

Uncertain

0.34

FATHMM_MKL

Uncertain

0.84

LIST_S2

Uncertain

0.90

M_CAP

Pathogenic

0.51

MetaRNN

Pathogenic

0.76

MetaSVM

Uncertain

0.54

MutationTaster

Benign

1.0

PROVEAN

Benign

-1.6

REVEL

Pathogenic

0.77

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

0.89

Vest4

0.82

MVP

0.95

ClinPred

0.79

GERP RS

4.8

Varity_R

0.85

gMVP

0.54

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