rs74361095

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The ENST00000395938.7(PMP22):c.385C>T(p.Arg129Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00124 in 1,614,112 control chromosomes in the GnomAD database, including 36 homozygotes. In-silico tool predicts a benign outcome for this variant. 5/6 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R129Q) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0069 ( 19 hom., cov: 33)

Exomes 𝑓: 0.00065 ( 17 hom. )

Consequence

PMP22
ENST00000395938.7 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: -0.755

Variant links:

Genes affected

PMP22 (HGNC:9118): (peripheral myelin protein 22) This gene encodes an integral membrane protein that is a major component of myelin in the peripheral nervous system. Studies suggest two alternately used promoters drive tissue-specific expression. Various mutations of this gene are causes of Charcot-Marie-Tooth disease Type IA, Dejerine-Sottas syndrome, and hereditary neuropathy with liability to pressure palsies. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]

PMP22 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.68).

BP6

Variant 17-15231004-G-A is Benign according to our data. Variant chr17-15231004-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 378379.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr17-15231004-G-A is described in Lovd as [Benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00688 (1048/152318) while in subpopulation AFR AF= 0.0241 (1002/41570). AF 95% confidence interval is 0.0229. There are 19 homozygotes in gnomad4. There are 517 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAd at 19 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PMP22	NM_000304.4 linkuse as main transcript	c.396C>T	p.Tyr132=	synonymous_variant	5/5	ENST00000312280.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PMP22	ENST00000312280.9 linkuse as main transcript	c.396C>T	p.Tyr132=	synonymous_variant	5/5	1	NM_000304.4	P1

Frequencies

GnomAD3 genomes

AF:

0.00689

AC:

1049

AN:

152200

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0242

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00203

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.00430

GnomAD3 exomes

AF:

0.00180

AC:

452

AN:

251308

Hom.:

AF XY:

0.00133

AC XY:

181

AN XY:

135856

show subpopulations

Gnomad AFR exome

AF:

0.0248

Gnomad AMR exome

AF:

0.00107

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000704

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000648

AC:

947

AN:

1461794

Hom.:

Cov.:

AF XY:

0.000540

AC XY:

393

AN XY:

727210

show subpopulations

Gnomad4 AFR exome

AF:

0.0235

Gnomad4 AMR exome

AF:

0.00114

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000297

Gnomad4 OTH exome

AF:

0.00118

GnomAD4 genome

AF:

0.00688

AC:

1048

AN:

152318

Hom.:

Cov.:

AF XY:

0.00694

AC XY:

517

AN XY:

74470

show subpopulations

Gnomad4 AFR

AF:

0.0241

Gnomad4 AMR

AF:

0.00203

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00425

Alfa

AF:

0.00332

Hom.:

Bravo

AF:

0.00768

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Sep 11, 2018	- -
Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Apr 01, 2022	- -

not specified

Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Feb 02, 2016

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 11, 2019

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Dejerine-Sottas disease;C0205713:Roussy-Lévy syndrome;C0270911:Charcot-Marie-Tooth disease, type IA;C0393814:Hereditary liability to pressure palsies;C3495591:Charcot-Marie-Tooth disease type 1E;C4083008:Guillain-Barre syndrome, familial

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Jan 03, 2022

- -

Charcot-Marie-Tooth disease, type I

Benign:1

Benign, criteria provided, single submitter

clinical testing

Invitae

Jan 26, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.68

Cadd

Benign

0.38

Dann

Benign

0.63

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

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