2-178447566-G-A

Variant names:

• chr2-178447566-G-A
• rs1311237497
• NM_003690.5:c.256C>T
• PRKRA p.Leu86Leu

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_001316362.2(PRKRA):​c.-194C>T variant causes a 5 prime UTR premature start codon gain change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,206 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 36)
• Consequence: PRKRA NM_001316362.2 5_prime_UTR_premature_start_codon_gain
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.19
• Publications: 0 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, Laboratory for Molecular Medicine, Labcorp Genetics (formerly Invitae), Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.44).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001316362.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRKRA	NM_003690.5	MANE Select	c.256C>T	p.Leu86Leu	synonymous	Exon 3 of 8	NP_003681.1	O75569-1
	PRKRA	NM_001316362.2		c.-194C>T		5_prime_UTR_premature_start_codon_gain	Exon 3 of 9	NP_001303291.1	B4DJC7
	PRKRA	NM_001139517.1		c.223C>T	p.Leu75Leu	synonymous	Exon 2 of 7	NP_001132989.1	O75569-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRKRA	ENST00000325748.9	TSL:1 MANE Select	c.256C>T	p.Leu86Leu	synonymous	Exon 3 of 8	ENSP00000318176.4	O75569-1
	PRKRA	ENST00000432031.6	TSL:1	c.223C>T	p.Leu75Leu	synonymous	Exon 2 of 7	ENSP00000393883.2	O75569-2
	PRKRA	ENST00000487082.5	TSL:1	c.181C>T	p.Leu61Leu	synonymous	Exon 3 of 8	ENSP00000430604.1	O75569-3

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152206 Hom.: 0 Cov.: 36

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: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 48

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152206 Hom.: 0 Cov.: 36 AF XY: 0.0000134 AC XY: 1 AN XY: 74360

African (AFR) AF: 0.00 AC: 0 AN: 41434

American (AMR) AF: 0.00 AC: 0 AN: 15288

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5206

South Asian (SAS) AF: 0.00 AC: 0 AN: 4838

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10608

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68042

Other (OTH) AF: 0.00 AC: 0 AN: 2092

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.44
CADD	Benign	12
DANN	Benign	0.75
PhyloP100		1.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=286/14	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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

dbSNP: rs1311237497;

hg19: chr2-179312293;