2-44339287-C-T

Variant names:

Variant summary

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

The NM_001171613.2(PREPL):c.562G>A(p.Val188Met) variant causes a missense change. The variant allele was found at a frequency of 0.000367 in 1,614,078 control chromosomes in the GnomAD database, including 1 homozygotes. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00028 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00038 ( 1 hom. )

Consequence

PREPL
NM_001171613.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 5.43

Variant links:

Genes affected

PREPL (HGNC:30228): (prolyl endopeptidase like) The protein encoded by this gene belongs to the prolyl oligopeptidase subfamily of serine peptidases. Mutations in this gene have been associated with hypotonia-cystinuria syndrome, also known as the 2p21 deletion syndrome. Several alternatively spliced transcript variants encoding either the same or different isoforms have been described for this gene.[provided by RefSeq, Jan 2010]

PREPL links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PREPL	NM_001171613.2 link	c.562G>A	p.Val188Met	missense_variant	Exon 6 of 14	ENST00000409411.6	NP_001165084.1	Q4J6C6-4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PREPL	ENST00000409411.6 link	c.562G>A	p.Val188Met	missense_variant	Exon 6 of 14	1	NM_001171613.2	ENSP00000387095.2		Q4J6C6-4

Frequencies

GnomAD3 genomes

AF:

0.000283

AC:

AN:

152172

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000193

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000189

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000485

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000167

AC:

AN:

251274

Hom.:

AF XY:

0.000199

AC XY:

AN XY:

135802

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000579

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000343

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000376

AC:

550

AN:

1461788

Hom.:

Cov.:

AF XY:

0.000377

AC XY:

274

AN XY:

727192

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000448

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.000478

Gnomad4 OTH exome

AF:

0.000265

GnomAD4 genome

AF:

0.000282

AC:

AN:

152290

Hom.:

Cov.:

AF XY:

0.000295

AC XY:

AN XY:

74462

show subpopulations

Gnomad4 AFR

AF:

0.000192

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000189

Gnomad4 NFE

AF:

0.000485

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000455

Hom.:

Bravo

AF:

0.000227

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000465

AC:

ExAC

AF:

0.000115

AC:

EpiCase

AF:

0.000382

EpiControl

AF:

0.000415

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Myasthenic syndrome, congenital, 22

Uncertain:1

Sep 07, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces valine, which is neutral and non-polar, with methionine, which is neutral and non-polar, at codon 277 of the PREPL protein (p.Val277Met). This variant is present in population databases (rs150341120, gnomAD 0.04%). This variant has not been reported in the literature in individuals affected with PREPL-related conditions. ClinVar contains an entry for this variant (Variation ID: 566429). 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: "Probably Damaging"; 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. -

Inborn genetic diseases

Uncertain:1

Mar 01, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.829G>A (p.V277M) alteration is located in exon 6 (coding exon 6) of the PREPL gene. This alteration results from a G to A substitution at nucleotide position 829, causing the valine (V) at amino acid position 277 to be replaced by a methionine (M). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.60

BayesDel_addAF

Benign

-0.058

BayesDel_noAF

Uncertain

-0.010

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.12

.;.;.;T;T;T;T;.;.

Eigen

Pathogenic

0.74

Eigen_PC

Pathogenic

0.73

FATHMM_MKL

Uncertain

0.96

LIST_S2

Uncertain

0.95

D;.;.;.;.;.;D;D;D

M_CAP

Benign

0.051

MetaRNN

Uncertain

0.48

T;T;T;T;T;T;T;T;T

MetaSVM

Benign

-0.54

MutationAssessor

Benign

1.1

.;.;.;L;L;L;L;L;L

PrimateAI

Uncertain

0.55

PROVEAN

Benign

-2.1

N;N;N;N;N;N;N;N;N

REVEL

Benign

0.20

Sift

Uncertain

0.0030

D;D;D;D;D;D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D;D;D;D;D;D

Polyphen

1.0, 1.0

.;.;.;D;D;D;D;D;D

Vest4

0.75

MVP

0.74

MPC

0.023

ClinPred

0.30

GERP RS

5.5

Varity_R

0.46

gMVP

0.74

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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