2-178451708-C-T

Variant names:

• chr2-178451708-C-T
• rs183157169
• NM_001042702.5:c.-84C>T

Variant summary

Our verdict is Benign. Variant got -9 ACMG points: 0P and 9B. BP4_Strong BS1_Supporting BS2

The NM_001042702.5(PJVK):​c.-84C>T variant causes a 5 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00535 in 936,928 control chromosomes in the GnomAD database, including 17 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: 𝑓 0.0032 (2 hom., cov: 32)
  • Exomes 𝑓: 0.0058 (15 hom.)
• Consequence: PJVK NM_001042702.5 5_prime_UTR
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.459

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]

PRKRA (HGNC:9438): (protein activator of interferon induced protein kinase EIF2AK2) This gene encodes a protein kinase activated by double-stranded RNA which mediates the effects of interferon in response to viral infection. Mutations in this gene have been associated with dystonia. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2008]

ACMG classification

Verdict is Benign. Variant got -9 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.78).
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00321 (489/152294) while in subpopulation NFE AF= 0.00526 (358/68018). AF 95% confidence interval is 0.00481. There are 2 homozygotes in gnomad4. There are 221 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting
• BS2: High Homozygotes in GnomAd4 at 2 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PJVK	NM_001042702.5	c.-84C>T		5_prime_UTR_variant	Exon 1 of 7	ENST00000644580.2	NP_001036167.1
PJVK	NM_001353775.2	c.-133C>T		5_prime_UTR_variant	Exon 1 of 7		NP_001340704.1
PJVK	NM_001353777.1	c.-396C>T		5_prime_UTR_variant	Exon 1 of 7		NP_001340706.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PJVK	ENST00000644580	c.-84C>T		5_prime_UTR_variant	Exon 1 of 7		NM_001042702.5	ENSP00000495855.2

Frequencies

GnomAD3 genomes AF: 0.00322 AC: 490 AN: 152176 Hom.: 2 Cov.: 32

Gnomad AFR AF: 0.000772

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00236

Gnomad ASJ AF: 0.00173

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00165

Gnomad FIN AF: 0.00368

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00528

Gnomad OTH AF: 0.00478

GnomAD4 exome AF: 0.00576 AC: 4523 AN: 784634 Hom.: 15 Cov.: 12 AF XY: 0.00586 AC XY: 2130 AN XY: 363582

Gnomad4 AFR exome AF: 0.000680

Gnomad4 AMR exome AF: 0.00327

Gnomad4 ASJ exome AF: 0.00248

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00251

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00602

Gnomad4 OTH exome AF: 0.00530

GnomAD4 genome AF: 0.00321 AC: 489 AN: 152294 Hom.: 2 Cov.: 32 AF XY: 0.00297 AC XY: 221 AN XY: 74466

Gnomad4 AFR AF: 0.000770

Gnomad4 AMR AF: 0.00235

Gnomad4 ASJ AF: 0.00173

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00166

Gnomad4 FIN AF: 0.00368

Gnomad4 NFE AF: 0.00526

Gnomad4 OTH AF: 0.00473

Alfa AF: 0.00381 Hom.: 0

Bravo AF: 0.00303

Asia WGS AF: 0.00144 AC: 5 AN: 3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Autosomal recessive nonsyndromic hearing loss 59 Uncertain:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.78
CADD	Benign	5.1
DANN	Benign	0.82

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

Other links and lift over

dbSNP: rs183157169; hg19: chr2-179316435;