Genetic Variant DNAJB4:p.Thr253Ile (chr1-78013597-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_007034.5(DNAJB4):c.758C>T(p.Thr253Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000249 in 1,593,436 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000085 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00027 ( 1 hom. )

Consequence

DNAJB4
NM_007034.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.22

Variant links:

Genes affected

DNAJB4 (HGNC:14886): (DnaJ heat shock protein family (Hsp40) member B4) The protein encoded by this gene is a molecular chaperone, tumor suppressor, and member of the heat shock protein-40 family. The encoded protein binds the cell adhesion protein E-cadherin and targets it to the plasma membrane. This protein also binds incorrectly folded E-cadherin and targets it for endoplasmic reticulum-associated degradation. This gene is a strong tumor suppressor for colorectal carcinoma, and downregulation of it may serve as a good biomarker for predicting patient outcomes. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Nov 2015]

DNAJB4 links:

GIPC2 (HGNC:18177): (GIPC PDZ domain containing family member 2) Enables identical protein binding activity. Located in extracellular exosome. [provided by Alliance of Genome Resources, Apr 2022]

GIPC2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.040651947).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DNAJB4	NM_007034.5 link	c.758C>T	p.Thr253Ile	missense_variant	Exon 2 of 3	ENST00000370763.6	NP_008965.2	Q9UDY4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DNAJB4	ENST00000370763.6 link	c.758C>T	p.Thr253Ile	missense_variant	Exon 2 of 3	1	NM_007034.5	ENSP00000359799.5		Q9UDY4

Frequencies

GnomAD3 genomes

AF:

0.0000855

AC:

AN:

152108

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:

0.00145

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000247

AC:

AN:

226722

Hom.:

AF XY:

0.000331

AC XY:

AN XY:

123892

show subpopulations

Gnomad AFR exome

AF:

0.0000687

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000112

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00131

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000150

Gnomad OTH exome

AF:

0.000544

GnomAD4 exome

AF:

0.000266

AC:

383

AN:

1441210

Hom.:

Cov.:

AF XY:

0.000296

AC XY:

212

AN XY:

716490

show subpopulations

Gnomad4 AFR exome

AF:

0.0000618

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000790

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00128

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000220

Gnomad4 OTH exome

AF:

0.000369

GnomAD4 genome

AF:

0.0000854

AC:

AN:

152226

Hom.:

Cov.:

AF XY:

0.000134

AC XY:

AN XY:

74438

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:

0.00145

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000157

Hom.:

Bravo

AF:

0.0000642

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000519

AC:

ExAC

AF:

0.000298

AC:

Asia WGS

AF:

0.000866

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 06, 2021

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.758C>T (p.T253I) alteration is located in exon 2 (coding exon 2) of the DNAJB4 gene. This alteration results from a C to T substitution at nucleotide position 758, causing the threonine (T) at amino acid position 253 to be replaced by an isoleucine (I). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.42

BayesDel_noAF

Benign

-0.40

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.14

Eigen

Benign

-0.018

Eigen_PC

Benign

0.0046

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.94

M_CAP

Benign

0.017

MetaRNN

Benign

0.041

MetaSVM

Benign

-0.85

MutationAssessor

Uncertain

2.2

PrimateAI

Uncertain

0.49

PROVEAN

Uncertain

-3.0

REVEL

Benign

0.18

Sift

Benign

0.047

Sift4G

Benign

0.061

Polyphen

0.19

Vest4

0.14

MutPred

0.50

Gain of catalytic residue at L258 (P = 0.0667);

MVP

0.31

MPC

0.24

ClinPred

0.084

GERP RS

1.0

Varity_R

0.15

gMVP

0.36

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

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