rs200835105

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_181882.3(PRX):c.4130G>A(p.Arg1377His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000338 in 1,599,206 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R1377C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000053 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000032 ( 0 hom. )

Consequence

PRX
NM_181882.3 missense

Scores

Clinical Significance

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

Conservation

PhyloP100: 1.28

Publications

1 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: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.13967776).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PRX	NM_181882.3 link	c.4130G>A	p.Arg1377His	missense_variant	Exon 7 of 7	ENST00000324001.8	NP_870998.2	Q9BXM0-1
PRX	NM_001411127.1 link	c.4415G>A	p.Arg1472His	missense_variant	Exon 7 of 7		NP_001398056.1
PRX	XM_017027047.2 link	c.4028G>A	p.Arg1343His	missense_variant	Exon 4 of 4		XP_016882536.1
PRX	NM_020956.2 link	c.*4335G>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.4130G>A	p.Arg1377His	missense_variant	Exon 7 of 7	1	NM_181882.3	ENSP00000326018.6		Q9BXM0-1

Frequencies

GnomAD3 genomes

AF:

0.0000526

AC:

AN:

152086

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000373

AC:

AN:

241384

AF XY:

0.0000535

show subpopulations

Gnomad AFR exome

AF:

0.000260

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000368

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000318

AC:

AN:

1447002

Hom.:

Cov.:

AF XY:

0.0000293

AC XY:

AN XY:

717378

show subpopulations

African (AFR)

AF:

0.000452

AC:

AN:

33168

American (AMR)

AF:

0.0000228

AC:

AN:

43844

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25396

East Asian (EAS)

AF:

0.00

AC:

AN:

39378

South Asian (SAS)

AF:

0.0000353

AC:

AN:

84958

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53000

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5692

European-Non Finnish (NFE)

AF:

0.0000227

AC:

AN:

1101936

Other (OTH)

AF:

0.0000335

AC:

AN:

59630

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

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:

0.0000526

AC:

AN:

152204

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74422

show subpopulations

African (AFR)

AF:

0.000120

AC:

AN:

41528

American (AMR)

AF:

0.00

AC:

AN:

15298

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5156

South Asian (SAS)

AF:

0.000207

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

67978

Other (OTH)

AF:

0.00

AC:

AN:

2114

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.481

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

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:

0.0000385

Hom.:

Bravo

AF:

0.0000907

ExAC

AF:

0.0000248

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Aug 19, 2020

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The p.R1377H variant (also known as c.4130G>A), located in coding exon 4 of the PRX gene, results from a G to A substitution at nucleotide position 4130. The arginine at codon 1377 is replaced by histidine, an amino acid with highly similar properties. This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Charcot-Marie-Tooth disease type 4

Uncertain:1

Mar 09, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

ClinVar contains an entry for this variant (Variation ID: 583179). This variant has not been reported in the literature in individuals affected with PRX-related conditions. This variant is present in population databases (rs200835105, gnomAD 0.03%). This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 1377 of the PRX protein (p.Arg1377His). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Deleterious"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0". The histidine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.44

BayesDel_noAF

Benign

-0.57

CADD

Uncertain

(source)

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.29

Eigen

Uncertain

0.38

Eigen_PC

Uncertain

0.32

FATHMM_MKL

Benign

0.69

LIST_S2

Benign

0.72

M_CAP

Benign

0.021

MetaRNN

Benign

0.14

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.97

PhyloP100

1.3

PrimateAI

Uncertain

0.69

PROVEAN

Benign

-1.6

REVEL

Benign

0.093

Sift

Benign

0.084

Sift4G

Uncertain

0.0070

Polyphen

1.0

Vest4

0.20

MVP

0.53

MPC

0.71

ClinPred

0.19

GERP RS

2.7

Varity_R

0.065

gMVP

0.56

Mutation Taster

=88/12

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