chr16-29814450-G-C

Variant names:

• chr16-29814450-G-C
• rs749851660
• NM_145239.3:c.997G>C

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_145239.3(PRRT2):​c.997G>C​(p.Val333Leu) 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. 9/15 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. V333I) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PRRT2 NM_145239.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.09
• Publications: 0 publications found

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]

ENSG00000280893 (HGNC:):

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

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.30363446).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_145239.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRRT2	NM_145239.3	MANE Select	c.997G>C	p.Val333Leu	missense	Exon 3 of 4	NP_660282.2
	PRRT2	NM_001256442.2		c.997G>C	p.Val333Leu	missense	Exon 3 of 3	NP_001243371.1
	PRRT2	NM_001438121.1		c.997G>C	p.Val333Leu	missense	Exon 3 of 3	NP_001425050.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PRRT2	ENST00000358758.12	TSL:1 MANE Select	c.997G>C	p.Val333Leu	missense	Exon 3 of 4	ENSP00000351608.7
	ENSG00000280893	ENST00000609618.2	TSL:5	n.986G>C		non_coding_transcript_exon	Exon 3 of 6	ENSP00000476774.2
	PRRT2	ENST00000567659.3	TSL:2	c.997G>C	p.Val333Leu	missense	Exon 3 of 3	ENSP00000456226.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 35

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.54
BayesDel_addAF	Benign	0.0040	T
BayesDel_noAF	Benign	-0.23
CADD	Pathogenic	26
DANN	Uncertain	0.99
Eigen	Benign	-0.061
Eigen_PC	Benign	0.030
FATHMM_MKL	Benign	0.74	D
LIST_S2	Benign	0.33	T
M_CAP	Benign	0.069	D
MetaRNN	Benign	0.30	T
PhyloP100		3.1
ClinPred		0.64	D
GERP RS		2.7
PromoterAI		-0.16	Neutral
Varity_R		0.17

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

Other links and lift over

dbSNP: rs749851660; hg19: chr16-29825771;