2-178453410-A-G

Position:

• chr2-178453410-A-G

Variant summary

Our verdict is Pathogenic. Variant got 10 ACMG points: 10P and 0B. PVS1 PM2

The NM_001042702.5(PJVK):​c.1A>G​(p.Met1?) variant causes a start lost change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: PJVK NM_001042702.5 start_lost
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 8.95

Genes affected

PJVK (HGNC:29502): (pejvakin) The protein encoded by this gene is a member of the gasdermin family, a family which is found only in vertebrates. The encoded protein is required for the proper function of auditory pathway neurons. Defects in this gene are a cause of non-syndromic sensorineural deafness autosomal recessive type 59 (DFNB59). [provided by RefSeq, Dec 2008]

ACMG classification

Verdict is Pathogenic. Variant got 10 ACMG points.

• PVS1: Start lost variant, no new inframe start found.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PJVK	NM_001042702.5	c.1A>G	p.Met1?	start_lost	2/7	ENST00000644580.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PJVK	ENST00000644580.2	c.1A>G	p.Met1?	start_lost	2/7		NM_001042702.5	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Jun 01, 2020

Variant classified as Uncertain Significance - Favor Pathogenic. The p.Met1? variant in DFNB59 (aka PJVK) has been previously reported by our laboratory in an individual with hearing loss who had a pathogenic DFNB59 variant identified in trans. It was absent from large population studies. This variant affects the translation initiation start codon (ATG) and is therefore predicted to disrupt translation although a variety of outcomes (no protein synthesis or the activation of an upstream translation initiation codon) are possible. Of note, several isoforms of the DFNB59 gene exist, with a transcript of similar length and coding regions (NM_001353775.1) having an alternate initiation codon location. In summary, while there is some suspicion for a pathogenic role, the clinical significance of this variant is uncertain. ACMG/AMP Criteria applied: PM2, PVS1_Supporting, PM3. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.23	D
BayesDel_noAF	Uncertain	0.10
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.63	D;D;.;D
Eigen	Uncertain	0.47
Eigen_PC	Uncertain	0.58
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.90	.;.;D;D
M_CAP	Uncertain	0.12	D
MetaRNN	Pathogenic	0.81	D;D;D;D
MetaSVM	Benign	-1.1	T
MutationTaster	Benign	1.0	D;D
PROVEAN	Uncertain	-3.3	.;D;.;D
REVEL	Uncertain	0.46
Sift	Benign	0.057	.;T;.;T
Sift4G	Pathogenic	0.0	.;D;.;D
Polyphen		0.68	P;P;.;P
Vest4		0.93, 0.91
MutPred		0.75		Loss of MoRF binding (P = 0.1101);Loss of MoRF binding (P = 0.1101);Loss of MoRF binding (P = 0.1101);Loss of MoRF binding (P = 0.1101);
MVP		0.030
ClinPred		0.97	D
GERP RS		6.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.40
gMVP		0.75

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr2-179318137;