chr3-64157318-G-A

Position:

• chr3-64157318-G-A

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_198859.4(PRICKLE2):​c.444C>T​(p.Arg148=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00307 in 1,613,902 control chromosomes in the GnomAD database, including 9 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0019 (1 hom., cov: 33)
  • Exomes 𝑓: 0.0032 (8 hom.)
• Consequence: PRICKLE2 NM_198859.4 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:3
• Conservation: PhyloP100: -1.18

Genes affected

PRICKLE2 (HGNC:20340): (prickle planar cell polarity protein 2) This gene encodes a homolog of Drosophila prickle. The exact function of this gene is not known, however, studies in mice suggest that it may be involved in seizure prevention. Mutations in this gene are associated with progressive myoclonic epilepsy type 5. [provided by RefSeq, Dec 2011]

ACMG classification

Verdict is Benign. Variant got -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.79).
• BP6: Variant 3-64157318-G-A is Benign according to our data. Variant chr3-64157318-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 197904.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BP7: Synonymous conserved (PhyloP=-1.18 with no splicing effect.
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.00186 (283/152324) while in subpopulation NFE AF= 0.00331 (225/68032). AF 95% confidence interval is 0.00295. There are 1 homozygotes in gnomad4. There are 137 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 283 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PRICKLE2	NM_198859.4	c.444C>T	p.Arg148=	synonymous_variant	5/8	ENST00000638394.2
PRICKLE2	NM_001370528.1	c.444C>T	p.Arg148=	synonymous_variant	5/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PRICKLE2	ENST00000638394.2	c.444C>T	p.Arg148=	synonymous_variant	5/8	1	NM_198859.4
PRICKLE2	ENST00000295902.11	c.612C>T	p.Arg204=	synonymous_variant	6/9	5		P1
PRICKLE2	ENST00000564377.6	c.444C>T	p.Arg148=	synonymous_variant	5/8	5
PRICKLE2	ENST00000640303.1	n.1083C>T		non_coding_transcript_exon_variant	3/6	5

Frequencies

GnomAD3 genomes AF: 0.00187 AC: 284 AN: 152206 Hom.: 1 Cov.: 33

Gnomad AFR AF: 0.000675

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00137

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.000385

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.000377

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00332

Gnomad OTH AF: 0.00143

GnomAD3 exomes AF: 0.00163 AC: 408 AN: 250054 Hom.: 0 AF XY: 0.00157 AC XY: 212 AN XY: 135360

Gnomad AFR exome AF: 0.000680

Gnomad AMR exome AF: 0.000839

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000545

Gnomad SAS exome AF: 0.000294

Gnomad FIN exome AF: 0.000277

Gnomad NFE exome AF: 0.00307

Gnomad OTH exome AF: 0.00114

GnomAD4 exome AF: 0.00319 AC: 4667 AN: 1461578 Hom.: 8 Cov.: 34 AF XY: 0.00305 AC XY: 2218 AN XY: 727084

Gnomad4 AFR exome AF: 0.000508

Gnomad4 AMR exome AF: 0.00105

Gnomad4 ASJ exome AF: 0.0000383

Gnomad4 EAS exome AF: 0.000202

Gnomad4 SAS exome AF: 0.000383

Gnomad4 FIN exome AF: 0.000674

Gnomad4 NFE exome AF: 0.00393

Gnomad4 OTH exome AF: 0.00258

GnomAD4 genome AF: 0.00186 AC: 283 AN: 152324 Hom.: 1 Cov.: 33 AF XY: 0.00184 AC XY: 137 AN XY: 74496

Gnomad4 AFR AF: 0.000673

Gnomad4 AMR AF: 0.00137

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.000386

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.000377

Gnomad4 NFE AF: 0.00331

Gnomad4 OTH AF: 0.00142

Alfa AF: 0.00283 Hom.: 0

Bravo AF: 0.00223

Asia WGS AF: 0.000866 AC: 3 AN: 3478

EpiCase AF: 0.00289

EpiControl AF: 0.00284

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Eurofins Ntd Llc (ga)

Apr 12, 2017

- -

Progressive myoclonic epilepsy Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

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 and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -

Progressive myoclonic epilepsy type 5 Benign:1

Benign, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Jan 19, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.79
CADD	Benign	1.3
DANN	Benign	0.60

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: rs146538069; hg19: chr3-64142994;