Genes in panel

Adult onset movement disorder

Gene: PRKRA

Green List (high evidence)

PRKRA (protein activator of interferon induced protein kinase EIF2AK2)
EnsemblGeneIds (GRCh38): ENSG00000180228
EnsemblGeneIds (GRCh37): ENSG00000180228
OMIM: 603424, Gene2Phenotype
PRKRA is in 7 panels

2 reviews

Louise Daugherty (Genomics England Curator)

I don't know

Review and rating submitted by James Polke (North Bristol NHS Trust), unless specified in the review comment, on behalf of London North GLH for GMS Neurology specialist test group.
Created: 23 Apr 2019, 1:19 p.m.

James Polke (Neurogenetics Laboratory, Institute of Neurology, London)

Green List (high evidence)

Details

Mode of Inheritance
BIALLELIC, autosomal or pseudoautosomal
Sources
  • NHS GMS
  • London North GLH
  • Expert Review Green
Phenotypes
  • Early-Onset Generalized Dystonia-Parkinsonism
  • Early Onset Complex Disease
  • Dystonia 16
  • early-Onset Generalized dystonia-parkinsonism (DYT16), non-responsive to levo-dopa
  • early-onset generalized dystonia-parkinsonism (DYT16), non-responsive to levo-dopa
  • Dystonia
  • Dystonia 16, 612067
OMIM
603424
Clinvar variants
Variants in PRKRA
Penetrance
None
Publications
  • 24142417
  • 22842711
  • 26990861
  • 25142429
  • 18420150 - a novel heterozygous variant c.266_267delAT
  • PMID: 26990861 - c.665C>T homozygous variant was identified in 3 affected siblings with Early-Onset Generalized Dystonia-Parkinsonism (and was heterozygous in the unaffected patients and an unaffected sibling). It was confirmed by Sanger sequencing and had a frequency of 0.01% in the Exome Aggregation Consortium database, predicted to be deleterious by 2 of 6 in silico tools. They showed it was within a founder haplotype shared by all previoulsy reported cases. The Authors state Screening of PRKRA is warranted in all patients with early-onset generalized dystonia, or dystonia parkinsonism compatible with autosomal recessive inheritance
  • p.H89fsX20 was reported in a proband with early childhood-onset leg dystonia (though testing in the parents was not mentioned).
  • 25737287
  • 25737287 Compound het variants (c.G230C (p.Cys77Ser), and in exon 7, c.G638T (p.Cys213Phe)) identified in the two affected siblings reported with dystonia without parkinsonism, unaffected family members were heterozygous
  • 25142429 In a Polish family, the homozygous p.Pro222Leu mutation segregated with autosomal-recessive, early-onset generalized dystonia and slight parkinsonism
  • 18420150
  • 18243799 - two unrelated families with members with an apparent autosomal recessive, novel, young-onset, generalised form of dystonia parkinsonism. A region of homozygosity was found in all affected individuals, and narrowed down to the homozygous variant c.665C>T (P222L)
  • 22842711 describes the clinical features of three original cases with homozygous PRKRA variants - the patients presented with either a pure generalised dystonia or with a dystonia-parkinsonism that was relatively unresponsive to L-dopa
  • http://www.ncbi.nlm.nih.gov/books/NBK1155/
  • 24142417 - Compound heterozygous variants were reported in a patient with early onset dystonia c.665C>T (p.P222L) inherited from his mother, and c.637T>C (p.C213R) was a novel mutation
  • 18243799
  • 25914261
Panels with this gene

History Filter Activity

23 Apr 2019, Gel status: 4

Added New Source

Louise Daugherty (Genomics England Curator)

Source NHS GMS was added to PRKRA.

23 Apr 2019, Gel status: 4

Added New Source

Louise Daugherty (Genomics England Curator)

Source London North GLH was added to PRKRA.

3 Jan 2019, Gel status: 4

Created, Added New Source, Set mode of inheritance, Set publications, Set Phenotypes

Ellen McDonagh (Genomics England Curator)

gene: PRKRA was added gene: PRKRA was added to Adult onset movement disorder. Sources: Expert Review Green Mode of inheritance for gene: PRKRA was set to BIALLELIC, autosomal or pseudoautosomal Publications for gene: PRKRA were set to 24142417; 22842711; 26990861; 25142429; 18420150 - a novel heterozygous variant c.266_267delAT; PMID: 26990861 - c.665C>T homozygous variant was identified in 3 affected siblings with Early-Onset Generalized Dystonia-Parkinsonism (and was heterozygous in the unaffected patients and an unaffected sibling). It was confirmed by Sanger sequencing and had a frequency of 0.01% in the Exome Aggregation Consortium database, predicted to be deleterious by 2 of 6 in silico tools. They showed it was within a founder haplotype shared by all previoulsy reported cases. The Authors state Screening of PRKRA is warranted in all patients with early-onset generalized dystonia, or dystonia parkinsonism compatible with autosomal recessive inheritance; p.H89fsX20 was reported in a proband with early childhood-onset leg dystonia (though testing in the parents was not mentioned).; 25737287; 25737287 Compound het variants (c.G230C (p.Cys77Ser), and in exon 7, c.G638T (p.Cys213Phe)) identified in the two affected siblings reported with dystonia without parkinsonism, unaffected family members were heterozygous; 25142429 In a Polish family, the homozygous p.Pro222Leu mutation segregated with autosomal-recessive, early-onset generalized dystonia and slight parkinsonism; 18420150; 18243799 - two unrelated families with members with an apparent autosomal recessive, novel, young-onset, generalised form of dystonia parkinsonism. A region of homozygosity was found in all affected individuals, and narrowed down to the homozygous variant c.665C>T (P222L); 22842711 describes the clinical features of three original cases with homozygous PRKRA variants - the patients presented with either a pure generalised dystonia or with a dystonia-parkinsonism that was relatively unresponsive to L-dopa; http://www.ncbi.nlm.nih.gov/books/NBK1155/; 24142417 - Compound heterozygous variants were reported in a patient with early onset dystonia c.665C>T (p.P222L) inherited from his mother, and c.637T>C (p.C213R) was a novel mutation; 18243799; 25914261 Phenotypes for gene: PRKRA were set to Early-Onset Generalized Dystonia-Parkinsonism; Early Onset Complex Disease; Dystonia 16; early-Onset Generalized dystonia-parkinsonism (DYT16), non-responsive to levo-dopa; early-onset generalized dystonia-parkinsonism (DYT16), non-responsive to levo-dopa; Dystonia; Dystonia 16, 612067