chr20-4699612-G-T

Position:

chr20-4699612-G-T

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM2PP3_ModeratePP5_Very_Strong

The NM_000311.5(PRNP):c.392G>T(p.Gly131Val) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,876 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

PRNP
NM_000311.5 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3

Conservation

PhyloP100: 6.02

Variant links:

Genes affected

PRNP (HGNC:9449): (prion protein (Kanno blood group)) The protein encoded by this gene is a membrane glycosylphosphatidylinositol-anchored glycoprotein that tends to aggregate into rod-like structures. The encoded protein contains a highly unstable region of five tandem octapeptide repeats. This gene is found on chromosome 20, approximately 20 kbp upstream of a gene which encodes a biochemically and structurally similar protein to the one encoded by this gene. Mutations in the repeat region as well as elsewhere in this gene have been associated with Creutzfeldt-Jakob disease, fatal familial insomnia, Gerstmann-Straussler disease, Huntington disease-like 1, and kuru. An overlapping open reading frame has been found for this gene that encodes a smaller, structurally unrelated protein, AltPrp. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2014]

PRNP links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.93

PP5

Variant 20-4699612-G-T is Pathogenic according to our data. Variant chr20-4699612-G-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 13410.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
PRNP	NM_000311.5 linkuse as main transcript	c.392G>T	p.Gly131Val	missense_variant	2/2	ENST00000379440.9	NP_000302.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
PRNP	ENST00000379440.9 linkuse as main transcript	c.392G>T	p.Gly131Val	missense_variant	2/2	1	NM_000311.5	ENSP00000368752.4	P04156-1
PRNP	ENST00000424424.2 linkuse as main transcript	c.392G>T	p.Gly131Val	missense_variant	2/2	1		ENSP00000411599.2	P04156-1A2A2V1
PRNP	ENST00000430350.2 linkuse as main transcript	c.392G>T	p.Gly131Val	missense_variant	2/2	1		ENSP00000399376.2	P04156-1
PRNP	ENST00000457586.2 linkuse as main transcript	c.392G>T	p.Gly131Val	missense_variant	2/2	1		ENSP00000415284.2	P04156-1X6RKS3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251396

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135900

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.0000992

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461876

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727236

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.0000383

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:

0.00

GnomAD4 genome

Cov.:

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Gerstmann-Straussler-Scheinker syndrome

Pathogenic:2

Likely pathogenic, criteria provided, single submitter	research	Suna and Inan Kirac Foundation Neurodegeneration Research Laboratory, Koc University	Mar 21, 2023	This case has this variant as heterozygous -
Pathogenic, no assertion criteria provided	literature only	OMIM	Nov 01, 2001	- -

Huntington disease-like 1

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Oct 16, 2023

This sequence change replaces glycine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 131 of the PRNP protein (p.Gly131Val). This variant is present in population databases (rs74315410, gnomAD 0.01%). This missense change has been observed in individuals with PRNP-related conditions (PMID: 11709001, 29458424, 32986314). It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 13410). 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 PRNP protein function. Experimental studies have shown that this missense change affects PRNP function (PMID: 29458424). For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Pathogenic

0.48

BayesDel_noAF

Pathogenic

0.45

CADD

Pathogenic

DANN

Uncertain

1.0

DEOGEN2

Benign

0.22

T;T;T;.

Eigen

Pathogenic

0.78

Eigen_PC

Pathogenic

0.75

FATHMM_MKL

Uncertain

0.93

LIST_S2

Pathogenic

0.99

.;D;D;D

M_CAP

Pathogenic

0.36

MetaRNN

Pathogenic

0.93

D;D;D;D

MetaSVM

Pathogenic

0.95

MutationAssessor

Uncertain

2.2

M;M;.;.

PrimateAI

Uncertain

0.58

PROVEAN

Uncertain

-2.9

D;D;D;D

REVEL

Pathogenic

0.86

Sift

Pathogenic

0.0

D;D;D;D

Sift4G

Pathogenic

0.0010

D;D;D;D

Polyphen

1.0

D;D;.;.

Vest4

0.98

MutPred

0.79

Gain of catalytic residue at G131 (P = 0.0829);Gain of catalytic residue at G131 (P = 0.0829);Gain of catalytic residue at G131 (P = 0.0829);Gain of catalytic residue at G131 (P = 0.0829);

MVP

1.0

MPC

1.6

ClinPred

0.99

GERP RS

5.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.92

gMVP

0.97

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over