rs9406386

Variant names:

• chr2-178451030-T-C
• rs9406386
• NM_003690.5:c.1A>G

Your query was ambiguous. Multiple possible variants found:

• chr2-178451030-T-C
• chr2-178451030-T-G

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PVS1_Moderate PM2

The NM_003690.5(PRKRA):​c.1A>G​(p.Met1?) variant causes a start lost change involving the alteration of a non-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: 34)
• Consequence: PRKRA NM_003690.5 start_lost
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.533
• Publications: 10 publications found

Genes affected

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]

PRKRA Gene-Disease associations (from GenCC):

• dystonia 16

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae), Laboratory for Molecular Medicine, Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PVS1: Start lost variant, next in-frame start position is after 1 pathogenic variants. Next in-frame start position is after 26 codons. Genomic position: 178450401. Lost 0.081 part of the original CDS.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_003690.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRKRA	NM_003690.5	MANE Select	c.1A>G	p.Met1?	start_lost	Exon 1 of 8	NP_003681.1
	PRKRA	NM_001316362.2		c.-449A>G		5_prime_UTR	Exon 1 of 9	NP_001303291.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRKRA	ENST00000325748.9	TSL:1 MANE Select	c.1A>G	p.Met1?	start_lost	Exon 1 of 8	ENSP00000318176.4
	PRKRA	ENST00000677981.1		c.1A>G	p.Met1?	start_lost	Exon 1 of 6	ENSP00000503536.1
	PRKRA	ENST00000424699.5	TSL:2	n.1A>G		non_coding_transcript_exon	Exon 1 of 9	ENSP00000408029.1

Frequencies

GnomAD3 genomes Cov.: 34

GnomAD4 exome Cov.: 38

GnomAD4 genome Cov.: 34

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Dystonia 16 Uncertain:1

Aug 04, 2020

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. This variant has not been reported in the literature in individuals with PRKRA-related conditions. This variant is not present in population databases (ExAC no frequency). This sequence change affects the initiator methionine of the PRKRA mRNA. The next in-frame methionine is located at codon 26.

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.31	D
BayesDel_noAF	Pathogenic	0.21
CADD	Benign	22
DANN	Uncertain	0.98
DEOGEN2	Benign	0.11	T
Eigen	Benign	-0.28
Eigen_PC	Benign	-0.17
FATHMM_MKL	Benign	0.49	N
LIST_S2	Uncertain	0.90	D
M_CAP	Pathogenic	1.0	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Benign	-0.78	T
PhyloP100		0.53
PROVEAN	Benign	-0.71	N
REVEL	Uncertain	0.39
Sift	Pathogenic	0.0	D
Sift4G	Benign	0.084	T
Polyphen		0.0	B
Vest4		0.78
MutPred		0.92		Gain of sheet (P = 0.0507)
MVP		0.64
ClinPred		0.96	D
GERP RS		3.3
PromoterAI		-0.30	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.93
gMVP		0.55
Mutation Taster		=124/76	polymorphism

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

Other links and lift over

dbSNP: rs9406386; hg19: chr2-179315757;