16-29813071-C-T

Position:

• chr16-29813071-C-T

Variant summary

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

The NM_145239.3(PRRT2):​c.17C>T​(p.Ser6Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: PRRT2 NM_145239.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.407

Genes affected

PRRT2 (HGNC:30500): (proline rich transmembrane protein 2) This gene encodes a transmembrane protein containing a proline-rich domain in its N-terminal half. Studies in mice suggest that it is predominantly expressed in brain and spinal cord in embryonic and postnatal stages. Mutations in this gene are associated with episodic kinesigenic dyskinesia-1. Alternatively spliced transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2012]

MVP-DT (HGNC:56029): (MVP divergent transcript)

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=0.20627087).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PRRT2	NM_145239.3	c.17C>T	p.Ser6Phe	missense_variant	2/4	ENST00000358758.12

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PRRT2	ENST00000358758.12	c.17C>T	p.Ser6Phe	missense_variant	2/4	1	NM_145239.3	P1
MVP-DT	ENST00000569039.5	n.246-2898G>A		intron_variant, non_coding_transcript_variant		2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Episodic kinesigenic dyskinesia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 31, 2023

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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt PRRT2 protein function. This variant has not been reported in the literature in individuals affected with PRRT2-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces serine, which is neutral and polar, with phenylalanine, which is neutral and non-polar, at codon 6 of the PRRT2 protein (p.Ser6Phe). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.18
BayesDel_addAF	Uncertain	0.023	T
BayesDel_noAF	Benign	-0.20
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.011	.;.;T;.;T;.;.;.;.;T;.;T;T;.
Eigen	Benign	0.14
Eigen_PC	Benign	0.10
FATHMM_MKL	Benign	0.56	D
LIST_S2	Benign	0.81	T;T;.;.;T;T;T;T;T;.;T;.;T;T
M_CAP	Benign	0.065	D
MetaRNN	Benign	0.21	T;T;T;T;T;T;T;T;T;T;T;T;T;T
MetaSVM	Uncertain	-0.084	T
MutationAssessor	Benign	1.8	.;.;L;L;.;L;.;.;L;L;.;L;L;.
MutationTaster	Benign	0.70	D;D;D
PrimateAI	Benign	0.42	T
PROVEAN	Pathogenic	-6.0	.;D;N;.;.;N;.;.;N;.;.;.;.;.
REVEL	Benign	0.16
Sift	Uncertain	0.0030	.;D;D;.;.;D;.;.;D;.;.;.;.;.
Sift4G	Uncertain	0.022	.;D;D;.;.;D;.;.;D;.;.;D;.;.
Polyphen		0.97, 0.91, 0.99	.;.;D;P;.;D;.;.;P;D;.;D;D;.
Vest4		0.36, 0.36, 0.28
MutPred		0.13		Loss of phosphorylation at S6 (P = 0.0054);Loss of phosphorylation at S6 (P = 0.0054);Loss of phosphorylation at S6 (P = 0.0054);Loss of phosphorylation at S6 (P = 0.0054);Loss of phosphorylation at S6 (P = 0.0054);Loss of phosphorylation at S6 (P = 0.0054);Loss of phosphorylation at S6 (P = 0.0054);Loss of phosphorylation at S6 (P = 0.0054);Loss of phosphorylation at S6 (P = 0.0054);Loss of phosphorylation at S6 (P = 0.0054);Loss of phosphorylation at S6 (P = 0.0054);Loss of phosphorylation at S6 (P = 0.0054);Loss of phosphorylation at S6 (P = 0.0054);Loss of phosphorylation at S6 (P = 0.0054);
MVP		0.85
MPC		0.89
ClinPred		0.93	D
GERP RS		4.1
Varity_R		0.21
gMVP		0.098

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: chr16-29824392;