19-40394506-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B.

-20

BP4_StrongBP6_Very_StrongBS1BS2

The NM_181882.3(PRX):c.3846G>A(p.Ser1282Ser) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000465 in 1,599,890 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. S1282S) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0026 ( 2 hom., cov: 33)

Exomes 𝑓: 0.00024 ( 4 hom. )

Consequence

PRX
NM_181882.3 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:9

Conservation

PhyloP100: -9.10

Publications

0 publications found

Variant links:

Genes affected

PRX (HGNC:13797): (periaxin) This gene encodes a protein involved in peripheral nerve myelin upkeep. The encoded protein contains 2 PDZ domains which were named after PSD95 (post synaptic density protein), DlgA (Drosophila disc large tumor suppressor), and ZO1 (a mammalian tight junction protein). Two alternatively spliced transcript variants have been described for this gene which encode different protein isoforms and which are targeted differently in the Schwann cell. Mutations in this gene cause Charcot-Marie-Tooth neuoropathy, type 4F and Dejerine-Sottas neuropathy. [provided by RefSeq, Jul 2008]

PRX Gene-Disease associations (from GenCC):

Charcot-Marie-Tooth disease type 4
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
Charcot-Marie-Tooth disease type 4F
Inheritance: AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics
Charcot-Marie-Tooth disease type 3
Inheritance: AD, AR Classification: MODERATE, SUPPORTIVE Submitted by: Orphanet, Ambry Genetics

PRX links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.9).

BP6

Variant 19-40394506-C-T is Benign according to our data. Variant chr19-40394506-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 329253.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.0026 (396/152278) while in subpopulation AFR AF = 0.00922 (383/41560). AF 95% confidence interval is 0.00845. There are 2 homozygotes in GnomAd4. There are 208 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 2 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PRX	NM_181882.3 link	c.3846G>A	p.Ser1282Ser	synonymous_variant	Exon 7 of 7	ENST00000324001.8	NP_870998.2	Q9BXM0-1
PRX	NM_001411127.1 link	c.4131G>A	p.Ser1377Ser	synonymous_variant	Exon 7 of 7		NP_001398056.1
PRX	XM_017027047.2 link	c.3744G>A	p.Ser1248Ser	synonymous_variant	Exon 4 of 4		XP_016882536.1
PRX	NM_020956.2 link	c.*4051G>A		3_prime_UTR_variant	Exon 6 of 6		NP_066007.1	Q9BXM0-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PRX	ENST00000324001.8 link	c.3846G>A	p.Ser1282Ser	synonymous_variant	Exon 7 of 7	1	NM_181882.3	ENSP00000326018.6		Q9BXM0-1

Frequencies

GnomAD3 genomes

AF:

0.00255

AC:

388

AN:

152160

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00905

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000523

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:

0.0000294

Gnomad OTH

AF:

0.00143

GnomAD2 exomes

AF:

0.000620

AC:

137

AN:

221088

AF XY:

0.000456

show subpopulations

Gnomad AFR exome

AF:

0.00888

Gnomad AMR exome

AF:

0.000313

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000182

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000408

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000240

AC:

348

AN:

1447612

Hom.:

Cov.:

AF XY:

0.000189

AC XY:

136

AN XY:

719490

show subpopulations

African (AFR)

AF:

0.00858

AC:

284

AN:

33086

American (AMR)

AF:

0.000256

AC:

AN:

42930

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25782

East Asian (EAS)

AF:

0.0000258

AC:

AN:

38772

South Asian (SAS)

AF:

0.0000237

AC:

AN:

84476

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51124

Middle Eastern (MID)

AF:

0.000348

AC:

AN:

5752

European-Non Finnish (NFE)

AF:

0.00000633

AC:

AN:

1105900

Other (OTH)

AF:

0.000686

AC:

AN:

59790

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.487

Heterozygous variant carriers

103

129

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00260

AC:

396

AN:

152278

Hom.:

Cov.:

AF XY:

0.00279

AC XY:

208

AN XY:

74448

show subpopulations

African (AFR)

AF:

0.00922

AC:

383

AN:

41560

American (AMR)

AF:

0.000523

AC:

AN:

15304

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5178

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

67994

Other (OTH)

AF:

0.00142

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.500

Heterozygous variant carriers

112

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00189

Hom.:

Bravo

AF:

0.00297

Asia WGS

AF:

0.00144

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:9

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:4

Mar 25, 2019

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Jan 25, 2021

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

- -

Mar 01, 2022

CeGaT Center for Human Genetics Tuebingen

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

PRX: BP4, BP7 -

not specified

Benign:1

Dec 01, 2020

Athena Diagnostics

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Charcot-Marie-Tooth disease

Benign:1

Molecular Genetics Laboratory, London Health Sciences Centre

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Inborn genetic diseases

Benign:1

Jul 11, 2019

Ambry Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

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. -

Charcot-Marie-Tooth disease type 4F

Benign:1

Jan 12, 2018

Illumina Laboratory Services, Illumina

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Charcot-Marie-Tooth disease type 4

Benign:1

Jan 28, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.90

CADD

Benign

0.11

(source)

DANN

Benign

0.80

PhyloP100

-9.1

Mutation Taster

=100/0

polymorphism

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over