chr12-42459882-G-A

Position:

• chr12-42459882-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_153026.3(PRICKLE1):​c.2423C>T​(p.Pro808Leu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P808T) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PRICKLE1 NM_153026.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.97

Genes affected

PRICKLE1 (HGNC:17019): (prickle planar cell polarity protein 1) This gene encodes a nuclear receptor that may be a negative regulator of the Wnt/beta-catenin signaling pathway. The encoded protein localizes to the nuclear membrane and has been implicated in the nuclear trafficking of the transcription repressors REST/NRSF and REST4. Mutations in this gene have been linked to progressive myoclonus epilepsy. Alternate splicing results in multiple transcript variants. A pseudogene of this gene is found on chromosome 3. [provided by RefSeq, Sep 2009]

(HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.16337803).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PRICKLE1	NM_153026.3	c.2423C>T	p.Pro808Leu	missense_variant	8/8	ENST00000345127.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PRICKLE1	ENST00000345127.9	c.2423C>T	p.Pro808Leu	missense_variant	8/8	1	NM_153026.3	P1
	ENST00000547824.1	n.517G>A		non_coding_transcript_exon_variant	1/2	1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Epilepsy, progressive myoclonic, 1B Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jul 26, 2022

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 808 of the PRICKLE1 protein (p.Pro808Leu). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with PRICKLE1-related conditions. ClinVar contains an entry for this variant (Variation ID: 1422114). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0"). 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.070
BayesDel_addAF	Benign	-0.080	T
BayesDel_noAF	Benign	-0.35
CADD	Benign	21
DANN	Uncertain	0.98
DEOGEN2	Benign	0.084	T;T;T;T;T;T;T;T;T;T
Eigen	Benign	-0.039
Eigen_PC	Benign	0.17
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.91	.;.;.;.;.;.;.;.;.;D
M_CAP	Benign	0.0091	T
MetaRNN	Benign	0.16	T;T;T;T;T;T;T;T;T;T
MetaSVM	Benign	-0.97	T
MutationAssessor	Benign	0.76	N;N;N;N;N;N;N;N;N;N
MutationTaster	Benign	1.0	D;D;D;D;D
PrimateAI	Benign	0.43	T
PROVEAN	Benign	-1.2	N;.;N;.;N;.;.;N;.;N
REVEL	Benign	0.070
Sift	Benign	0.13	T;.;T;.;T;.;.;T;.;T
Sift4G	Benign	0.21	T;.;T;.;T;.;.;T;.;T
Polyphen		0.049	B;B;B;B;B;B;B;B;B;B
Vest4		0.081
MutPred		0.14		Loss of relative solvent accessibility (P = 0.0404);Loss of relative solvent accessibility (P = 0.0404);Loss of relative solvent accessibility (P = 0.0404);Loss of relative solvent accessibility (P = 0.0404);Loss of relative solvent accessibility (P = 0.0404);Loss of relative solvent accessibility (P = 0.0404);Loss of relative solvent accessibility (P = 0.0404);Loss of relative solvent accessibility (P = 0.0404);Loss of relative solvent accessibility (P = 0.0404);Loss of relative solvent accessibility (P = 0.0404);
MVP		0.22
MPC		0.36
ClinPred		0.39	T
GERP RS		5.6
Varity_R		0.086
gMVP		0.24

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr12-42853684; COSMIC: COSV58206481; COSMIC: COSV58206481;