Genetic Variant PDIA2:p.Arg124Cys (chr16-284557-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_006849.4(PDIA2):c.370C>T(p.Arg124Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000912 in 1,612,604 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00013 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000087 ( 0 hom. )

Consequence

PDIA2
NM_006849.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.08

Variant links:

Genes affected

PDIA2 (HGNC:14180): (protein disulfide isomerase family A member 2) This gene encodes a member of the disulfide isomerase (PDI) family of endoplasmic reticulum (ER) proteins that catalyze protein folding and thiol-disulfide interchange reactions. The encoded protein has an N-terminal ER-signal sequence, two catalytically active thioredoxin (TRX) domains, two TRX-like domains and a C-terminal ER-retention sequence. The protein plays a role in the folding of nascent proteins in the endoplasmic reticulum by forming disulfide bonds through its thiol isomerase, oxidase, and reductase activity. The encoded protein also possesses estradiol-binding activity and can modulate intracellular estradiol levels. [provided by RefSeq, Sep 2017]

PDIA2 links:

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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 rank	MANE	Protein	UniProt
PDIA2	NM_006849.4 link	c.370C>T	p.Arg124Cys	missense_variant	Exon 2 of 11	ENST00000219406.11	NP_006840.2	Q13087-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PDIA2	ENST00000219406.11 link	c.370C>T	p.Arg124Cys	missense_variant	Exon 2 of 11	1	NM_006849.4	ENSP00000219406.7		Q13087-1

Frequencies

GnomAD3 genomes

AF:

0.000131

AC:

AN:

152248

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000289

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000196

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000770

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000171

AC:

AN:

245716

Hom.:

AF XY:

0.000127

AC XY:

AN XY:

133828

show subpopulations

Gnomad AFR exome

AF:

0.000265

Gnomad AMR exome

AF:

0.000612

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000785

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000180

Gnomad OTH exome

AF:

0.000168

GnomAD4 exome

AF:

0.0000870

AC:

127

AN:

1460356

Hom.:

Cov.:

AF XY:

0.0000798

AC XY:

AN XY:

726436

show subpopulations

Gnomad4 AFR exome

AF:

0.000269

Gnomad4 AMR exome

AF:

0.000605

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00144

Gnomad4 SAS exome

AF:

0.0000116

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000261

Gnomad4 OTH exome

AF:

0.0000663

GnomAD4 genome

AF:

0.000131

AC:

AN:

152248

Hom.:

Cov.:

AF XY:

0.000108

AC XY:

AN XY:

74384

show subpopulations

Gnomad4 AFR

AF:

0.000289

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000770

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000478

Alfa

AF:

0.0000954

Hom.:

Bravo

AF:

0.000151

ExAC

AF:

0.000141

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Sep 30, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.370C>T (p.R124C) alteration is located in exon 2 (coding exon 2) of the PDIA2 gene. This alteration results from a C to T substitution at nucleotide position 370, causing the arginine (R) at amino acid position 124 to be replaced by a cysteine (C). 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

0.10

BayesDel_addAF

Benign

-0.35

BayesDel_noAF

Benign

-0.36

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.078

T;.

Eigen

Benign

0.17

Eigen_PC

Benign

-0.022

FATHMM_MKL

Benign

0.52

LIST_S2

Uncertain

0.91

D;D

M_CAP

Benign

0.076

MetaRNN

Uncertain

0.43

T;T

MetaSVM

Benign

-0.45

MutationAssessor

Uncertain

2.1

M;M

PrimateAI

Benign

0.34

PROVEAN

Pathogenic

-5.2

D;D

REVEL

Benign

0.17

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0010

D;D

Polyphen

1.0

D;.

Vest4

0.60

MVP

0.79

ClinPred

0.20

GERP RS

1.9

Varity_R

0.68

gMVP

0.68

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