rs972442832

Positions:

• chr3-64099131-G-A
• chr3-64099131-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_198859.4(PRICKLE2):​c.2455C>T​(p.Pro819Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,461,894 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. P819P) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: PRICKLE2 NM_198859.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.83

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]

PRICKLE2-AS1 (HGNC:40916): (PRICKLE2 antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3642276).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PRICKLE2	NM_198859.4	c.2455C>T	p.Pro819Ser	missense_variant	8/8	ENST00000638394.2
PRICKLE2-AS1	NR_045697.1	n.2505G>A		non_coding_transcript_exon_variant	3/3
PRICKLE2	NM_001370528.1	c.2455C>T	p.Pro819Ser	missense_variant	8/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PRICKLE2	ENST00000638394.2	c.2455C>T	p.Pro819Ser	missense_variant	8/8	1	NM_198859.4
PRICKLE2-AS1	ENST00000482609.1	n.2505G>A		non_coding_transcript_exon_variant	3/3	1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461894 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727248

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.0000331

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Progressive myoclonic epilepsy type 5 Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Nov 26, 2020

In summary, this variant is a novel missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C25"). This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a PRICKLE2-related disease. This sequence change replaces proline with serine at codon 819 of the PRICKLE2 protein (p.Pro819Ser). The proline residue is highly conserved and there is a moderate physicochemical difference between proline and serine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Uncertain	0.050	T
BayesDel_noAF	Benign	-0.17
CADD	Benign	22
DANN	Uncertain	0.99
DEOGEN2	Benign	0.15	T;T;.
Eigen	Benign	0.18
Eigen_PC	Uncertain	0.31
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.86	.;D;D
M_CAP	Benign	0.058	D
MetaRNN	Benign	0.36	T;T;T
MetaSVM	Uncertain	-0.28	T
MutationAssessor	Benign	1.6	L;L;.
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.66	T
REVEL	Uncertain	0.47
Polyphen		0.49	P;P;.
MutPred		0.21		Gain of phosphorylation at P819 (P = 0.0438);Gain of phosphorylation at P819 (P = 0.0438);.;
MVP		0.53
MPC		0.57
ClinPred		0.59	D
GERP RS		5.6
Varity_R		0.080
gMVP		0.52

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: rs972442832; hg19: chr3-64084807; COSMIC: COSV55765681; COSMIC: COSV55765681;