Variant NM_006308.3:c.1A>G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 1P and 4B. PVS1_SupportingBS2

The NM_006308.3(HSPB3):c.1A>G(p.Met1?) variant causes a start lost change. The variant allele was found at a frequency of 0.0000136 in 1,613,990 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000079 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000068 ( 0 hom. )

Consequence

HSPB3
NM_006308.3 start_lost

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.14

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PVS1

Start lost variant, no pathogenic variants between lost start and next in-frame start position. Next in-frame start position is after 309 CDS bases. Genomic position: 54456098. Lost 0.682 part of the original CDS.

BS2

High AC in GnomAd4 at 12 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
HSPB3	NM_006308.3 link	c.1A>G	p.Met1?	start_lost	Exon 1 of 1	ENST00000302005.3	NP_006299.1	Q12988Q6ICS9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
HSPB3	ENST00000302005.3 link	c.1A>G	p.Met1?	start_lost	Exon 1 of 1	6	NM_006308.3	ENSP00000303394.1		Q12988

Frequencies

GnomAD3 genomes

AF:

0.0000789

AC:

AN:

152088

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000169

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000199

AC:

AN:

251170

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

135750

show subpopulations

Gnomad AFR exome

AF:

0.000246

Gnomad AMR exome

AF:

0.00

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:

0.00000881

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000684

AC:

AN:

1461784

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

727206

show subpopulations

Gnomad4 AFR exome

AF:

0.000149

Gnomad4 AMR exome

AF:

0.00

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:

0.00000360

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.0000788

AC:

AN:

152206

Hom.:

Cov.:

AF XY:

0.0000806

AC XY:

AN XY:

74406

show subpopulations

Gnomad4 AFR

AF:

0.000168

Gnomad4 AMR

AF:

0.000262

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000116

Hom.:

Bravo

AF:

0.000155

ESP6500AA

AF:

0.000454

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000412

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Aug 21, 2015

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1 A>G variant in the HSPB3 gene has not been reported previously as a disease-causing mutation nor as a benign polymorphism, to our knowledge. The variant alters the initiator Methionine codon, and the resultant protein would be described as p.Met1? using a question mark to signify that it is not known if the loss of Met1 means that all protein translation is completely prevented or if an abnormal protein is produced using an alternate Methionine. The c.1 A>G was not observed at any significant frequency in approximately 6,500 samples in the NHLBI Exome Sequencing Project but the 1000 Genomes Project reports c.1 A>G was observed in 2/4406 (0.15%) alleles from individuals of African background. To date, only a single missense variant has been reported in association with motor neuropathy (Stenson et al., 2014). It is unclear if the c.1 A>G variant would lead to loss of function or altered expression and whether this mechanism could cause disease. Therefore, given the available information, we interpret c.1 A>G as a variant of unknown significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Pathogenic

0.21

BayesDel_noAF

Pathogenic

0.37

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.043

Eigen

Uncertain

0.23

Eigen_PC

Uncertain

0.28

FATHMM_MKL

Uncertain

0.85

LIST_S2

Uncertain

0.90

M_CAP

Pathogenic

0.42

MetaRNN

Uncertain

0.65

MetaSVM

Uncertain

0.36

PROVEAN

Benign

-0.94

REVEL

Uncertain

0.61

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Polyphen

0.77

Vest4

0.82

MVP

0.88

ClinPred

0.95

GERP RS

4.9

Varity_R

0.87

gMVP

0.51

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