rs749067142

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1PM2PP5_Very_Strong

The NM_000466.3(PEX1):c.782_783del(p.Gln261ArgfsTer8) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000174 in 1,609,824 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely pathogenic (★★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

PEX1
NM_000466.3 frameshift

Scores

Not classified

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:9

Conservation

PhyloP100: -0.147

Variant links:

Genes affected

PEX1 (HGNC:8850): (peroxisomal biogenesis factor 1) This gene encodes a member of the AAA ATPase family, a large group of ATPases associated with diverse cellular activities. This protein is cytoplasmic but is often anchored to a peroxisomal membrane where it forms a heteromeric complex and plays a role in the import of proteins into peroxisomes and peroxisome biogenesis. Mutations in this gene have been associated with complementation group 1 peroxisomal disorders such as neonatal adrenoleukodystrophy, infantile Refsum disease, and Zellweger syndrome. Alternatively spliced transcript variants have been found for this gene. [provided by RefSeq, Sep 2013]

PEX1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 18 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 7-92517731-CTT-C is Pathogenic according to our data. Variant chr7-92517731-CTT-C is described in ClinVar as [Likely_pathogenic]. Clinvar id is 188910.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr7-92517731-CTT-C is described in Lovd as [Pathogenic]. Variant chr7-92517731-CTT-C is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
PEX1	NM_000466.3 linkuse as main transcript	c.782_783del	p.Gln261ArgfsTer8	frameshift_variant	5/24	ENST00000248633.9
PEX1	NM_001282677.2 linkuse as main transcript	c.782_783del	p.Gln261ArgfsTer8	frameshift_variant	5/23
PEX1	NM_001282678.2 linkuse as main transcript	c.158_159del	p.Gln53ArgfsTer8	frameshift_variant	5/24
PEX1	XM_047420472.1 linkuse as main transcript	c.782_783del	p.Gln261ArgfsTer8	frameshift_variant	5/23

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PEX1	ENST00000248633.9 linkuse as main transcript	c.782_783del	p.Gln261ArgfsTer8	frameshift_variant	5/24	1	NM_000466.3	P1	O43933-1
PEX1	ENST00000428214.5 linkuse as main transcript	c.782_783del	p.Gln261ArgfsTer8	frameshift_variant	5/23	1
PEX1	ENST00000438045.5 linkuse as main transcript	c.274-3766_274-3765del		intron_variant		2			O43933-2
PEX1	ENST00000484913.5 linkuse as main transcript	n.821_822del		non_coding_transcript_exon_variant	5/24	2

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152168

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000361

AC:

AN:

249146

Hom.:

AF XY:

0.0000297

AC XY:

AN XY:

134676

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000109

Gnomad SAS exome

AF:

0.000132

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000266

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000165

AC:

AN:

1457656

Hom.:

AF XY:

0.0000221

AC XY:

AN XY:

724580

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.000105

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000126

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152168

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74320

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000113

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:9

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Zellweger spectrum disorders

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Jan 20, 2024	This sequence change creates a premature translational stop signal (p.Gln261Argfs*8) in the PEX1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in PEX1 are known to be pathogenic (PMID: 21031596, 26387595, 31831025). This variant is present in population databases (rs749067142, gnomAD 0.01%). This premature translational stop signal has been observed in individuals with peroxisome biogenesis disorders (PMID: 19105186, 23247051). ClinVar contains an entry for this variant (Variation ID: 188910). For these reasons, this variant has been classified as Pathogenic. -
Pathogenic, no assertion criteria provided	clinical testing	Natera, Inc.	Mar 17, 2017	- -

not provided

Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Dec 01, 2021	- -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Oct 17, 2022	Frameshift variant predicted to result in protein truncation or nonsense mediated decay in a gene for which loss-of-function is a known mechanism of disease; Not observed at a significant frequency in large population cohorts (gnomAD); This variant is associated with the following publications: (PMID: 33708531, 19105186, 23247051) -

Inborn genetic diseases

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 23, 2023

The c.782_783delAA (p.Q261Rfs*8) alteration, located in exon 5 (coding exon 5) of the PEX1 gene, consists of a deletion of 2 nucleotides from position 782 to 783, causing a translational frameshift with a predicted alternate stop codon after 8 amino acids. This alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. Based on data from gnomAD, the c.782_783delAA allele has an overall frequency of 0.004% (9/249146) total alleles studied. The highest observed frequency was 0.013% (4/30214) of South Asian alleles. This variant has been reported compound heterozygous with other PEX1 variants in individuals with features consistent with PEX1-related peroxisome biogenesis spectrum disorder (Yik, 2009; Sun, 2013; Lu, 2021). Based on the available evidence, this alteration is classified as pathogenic. -

Heimler syndrome 1

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Baylor Genetics

Oct 18, 2023

- -

Peroxisome biogenesis disorder

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Jan 08, 2019

Variant summary: The variant, PEX1 c.782_783delAA (p.Gln261ArgfsX8) results in a premature termination codon, predicted to cause a truncation of the encoded protein or absence of the protein due to nonsense mediated decay, which are commonly known mechanisms for disease. Truncations downstream of this position have been classified as pathogenic by our laboratory (eg. c.2097dupT(p.Ile700fsX42), c.2916delA(p.Gly973fsX16)). The variant allele was found at a frequency of 3.7e-05 in 243912 control chromosomes (gnomAD) and has been reported in the literature in multiple individuals affected with Zellweger syndrome spectrum disorder (ZSS) and Zellweger Syndrome (Ebberink_2010, Yik_2009, Sun_2013) . These data indicate that the variant is very likely to be associated with disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014. Based on the evidence outlined above, the variant was classified as pathogenic. -

Peroxisome biogenesis disorder 1B;C4721541:Peroxisome biogenesis disorder 1A (Zellweger)

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Baylor Genetics

- -

Peroxisome biogenesis disorder 1A (Zellweger)

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

literature only

Counsyl

Aug 01, 2014

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

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