rs150451390

Variant names:

Variant summary

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

The NM_001127649.3(PEX26):c.571C>T(p.Arg191Trp) variant causes a missense change. The variant allele was found at a frequency of 0.000162 in 1,613,872 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. R191Q) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00012 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00017 ( 0 hom. )

Consequence

PEX26
NM_001127649.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:6

Conservation

PhyloP100: 3.67

Publications

1 publications found

Variant links:

Genes affected

PEX26 (HGNC:22965): (peroxisomal biogenesis factor 26) This gene belongs to the peroxin-26 gene family. It is probably required for protein import into peroxisomes. It anchors PEX1 and PEX6 to peroxisome membranes, possibly to form heteromeric AAA ATPase complexes required for the import of proteins into peroxisomes. Defects in this gene are the cause of peroxisome biogenesis disorder complementation group 8 (PBD-CG8). PBD refers to a group of peroxisomal disorders arising from a failure of protein import into the peroxisomal membrane or matrix. The PBD group is comprised of four disorders: Zellweger syndrome (ZWS), neonatal adrenoleukodystrophy (NALD), infantile Refsum disease (IRD), and classical rhizomelic chondrodysplasia punctata (RCDP). Alternatively spliced transcript variants have been identified for this gene. [provided by RefSeq, Dec 2010]

PEX26 Gene-Disease associations (from GenCC):

peroxisome biogenesis disorder
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
peroxisome biogenesis disorder 7A (Zellweger)
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
peroxisome biogenesis disorder 7B
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Ambry Genetics, G2P
Zellweger spectrum disorders
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

PEX26 links:

ENSG00000288683 (HGNC:):

ENSG00000288683 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=0.2523996).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PEX26	NM_001127649.3 link	c.571C>T	p.Arg191Trp	missense_variant	Exon 3 of 5	ENST00000399744.8	NP_001121121.1	Q7Z412-1A0A024R100
PEX26	NM_017929.6 link	c.571C>T	p.Arg191Trp	missense_variant	Exon 4 of 6		NP_060399.1	Q7Z412-1A0A024R100
PEX26	NM_001199319.2 link	c.571C>T	p.Arg191Trp	missense_variant	Exon 4 of 5		NP_001186248.1	Q7Z412-2Q7Z2D7A0A0S2Z5M7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
PEX26	ENST00000399744.8 link	c.571C>T	p.Arg191Trp	missense_variant	Exon 3 of 5	1	NM_001127649.3	ENSP00000382648.4	Q7Z412-1
PEX26	ENST00000329627.11 link	c.571C>T	p.Arg191Trp	missense_variant	Exon 4 of 6	1		ENSP00000331106.5	Q7Z412-1
PEX26	ENST00000428061.2 link	c.571C>T	p.Arg191Trp	missense_variant	Exon 3 of 4	1		ENSP00000412441.2	Q7Z412-2
ENSG00000288683	ENST00000474897.6 link	n.571C>T		non_coding_transcript_exon_variant	Exon 4 of 9	5		ENSP00000434235.2	E9PRC5

Frequencies

GnomAD3 genomes

AF:

0.000118

AC:

AN:

152088

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

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:

0.000176

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000796

AC:

AN:

251272

AF XY:

0.0000663

show subpopulations

Gnomad AFR exome

AF:

0.000246

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000132

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000166

AC:

243

AN:

1461784

Hom.:

Cov.:

AF XY:

0.000155

AC XY:

113

AN XY:

727184

show subpopulations

African (AFR)

AF:

0.000239

AC:

AN:

33472

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5712

European-Non Finnish (NFE)

AF:

0.000204

AC:

227

AN:

1111988

Other (OTH)

AF:

0.000116

AC:

AN:

60380

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.474

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:

0.000118

AC:

AN:

152088

Hom.:

Cov.:

AF XY:

0.0000808

AC XY:

AN XY:

74292

show subpopulations

African (AFR)

AF:

0.000121

AC:

AN:

41406

American (AMR)

AF:

0.0000655

AC:

AN:

15264

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10606

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000176

AC:

AN:

68020

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.461

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:

0.000248

Hom.:

Bravo

AF:

0.000170

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000233

AC:

ExAC

AF:

0.0000659

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:6

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Peroxisome biogenesis disorder 7B;C3888385:Peroxisome biogenesis disorder 7A (Zellweger)

Uncertain:2

Oct 31, 2018

Fulgent Genetics, Fulgent Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Sep 27, 2022

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

This sequence change replaces arginine, which is basic and polar, with tryptophan, which is neutral and slightly polar, at codon 191 of the PEX26 protein (p.Arg191Trp). This variant is present in population databases (rs150451390, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with PEX26-related conditions. ClinVar contains an entry for this variant (Variation ID: 498175). 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 PEX26 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. -

not provided

Uncertain:2

Oct 26, 2016

Eurofins Ntd Llc (ga)

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Feb 14, 2024

Mayo Clinic Laboratories, Mayo Clinic

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

PM2_moderate -

Inborn genetic diseases

Uncertain:1

Mar 31, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.571C>T (p.R191W) alteration is located in exon 4 (coding exon 3) of the PEX26 gene. This alteration results from a C to T substitution at nucleotide position 571, causing the arginine (R) at amino acid position 191 to be replaced by a tryptophan (W). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Peroxisome biogenesis disorder 7A (Zellweger)

Uncertain:1

Jan 13, 2018

Illumina Laboratory Services, Illumina

Significance:Uncertain significance

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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.11

BayesDel_addAF

Benign

-0.11

BayesDel_noAF

Benign

-0.090

CADD

Benign

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.47

.;T;T;.

Eigen

Benign

-0.33

Eigen_PC

Benign

-0.32

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.85

T;.;T;.

M_CAP

Uncertain

0.17

MetaRNN

Benign

0.25

T;T;T;T

MetaSVM

Uncertain

-0.15

MutationAssessor

Benign

0.34

N;N;N;N

PhyloP100

3.7

PrimateAI

Benign

0.27

PROVEAN

Uncertain

-3.7

.;D;D;D

REVEL

Uncertain

0.35

Sift

Uncertain

0.0010

.;D;D;D

Sift4G

Pathogenic

0.0010

D;D;D;D

Polyphen

0.98

.;D;D;.

Vest4

0.36

MVP

0.81

MPC

0.44

ClinPred

0.21

GERP RS

3.3

Varity_R

0.15

gMVP

0.35

Mutation Taster

=75/25

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