chr2-219283235-G-A

Position:

chr2-219283235-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The ENST00000336576.10(DNAJB2):c.548G>A(p.Arg183Lys) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.0000316 in 1,614,096 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000033 ( 0 hom. )

Consequence

DNAJB2
ENST00000336576.10 missense, splice_region

Scores

Splicing: ADA: 0.9998

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.79

Variant links:

Genes affected

DNAJB2 (HGNC:5228): (DnaJ heat shock protein family (Hsp40) member B2) This gene is almost exclusively expressed in the brain, mainly in the neuronal layers. It encodes a protein that shows sequence similarity to bacterial DnaJ protein and the yeast homologs. In bacteria, this protein is implicated in protein folding and protein complex dissociation. Alternatively spliced transcript variants encoding different isoforms have been described for this gene. [provided by RefSeq, Jul 2011]

DNAJB2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
DNAJB2	NM_006736.6 linkuse as main transcript	c.548G>A	p.Arg183Lys	missense_variant, splice_region_variant	7/9	ENST00000336576.10	NP_006727.2
DNAJB2	NM_001039550.2 linkuse as main transcript	c.548G>A	p.Arg183Lys	missense_variant, splice_region_variant	7/10		NP_001034639.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
DNAJB2	ENST00000336576.10 linkuse as main transcript	c.548G>A	p.Arg183Lys	missense_variant, splice_region_variant	7/9	1	NM_006736.6	ENSP00000338019		P25686-3

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152220

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000557

AC:

AN:

251362

Hom.:

AF XY:

0.0000589

AC XY:

AN XY:

135868

show subpopulations

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 SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000123

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000328

AC:

AN:

1461876

Hom.:

Cov.:

AF XY:

0.0000358

AC XY:

AN XY:

727242

show subpopulations

Gnomad4 AFR exome

AF:

0.00

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:

0.0000432

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152220

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74374

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000675

Hom.:

Bravo

AF:

0.0000151

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Neuronopathy, distal hereditary motor, autosomal recessive 5

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 13, 2022

This sequence change replaces arginine, which is basic and polar, with lysine, which is basic and polar, at codon 183 of the DNAJB2 protein (p.Arg183Lys). This variant also falls at the last nucleotide of exon 7, which is part of the consensus splice site for this exon. This variant is present in population databases (rs369758068, gnomAD 0.01%). This variant has not been reported in the literature in individuals affected with DNAJB2-related conditions. ClinVar contains an entry for this variant (Variation ID: 568441). Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be tolerated. Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. 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

AlphaMissense

Benign

0.19

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.51

CADD

Uncertain

DANN

Uncertain

0.98

DEOGEN2

Benign

0.019

T;T;.;T

Eigen

Benign

-0.11

Eigen_PC

Benign

0.064

FATHMM_MKL

Uncertain

0.94

LIST_S2

Uncertain

0.87

D;D;D;T

M_CAP

Benign

0.029

MetaRNN

Benign

0.15

T;T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.3

L;.;L;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.66

PROVEAN

Benign

-0.75

N;N;N;N

REVEL

Benign

0.029

Sift

Benign

0.49

T;T;T;T

Sift4G

Benign

0.52

T;T;T;T

Polyphen

0.074

B;.;B;.

Vest4

0.25

MVP

0.33

MPC

0.23

ClinPred

0.11

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

2.7

Varity_R

0.17

gMVP

0.68

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Pathogenic

1.0

dbscSNV1_RF

Pathogenic

0.96

SpliceAI score (max)

0.10

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