rs61750406

Positions:

• chr7-92517406-AT-A
• chr7-92517406-AT-ATT

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_000466.3(PEX1):​c.1108del​(p.Ile370LeufsTer17) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000464 in 1,444,688 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 0.000013 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000046 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: PEX1 NM_000466.3 frameshift
• Clinical Significance: Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:6
• Conservation: PhyloP100: -0.542

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]

ACMG classification

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 7-92517406-AT-A is Pathogenic according to our data. Variant chr7-92517406-AT-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 371779.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr7-92517406-AT-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PEX1	NM_000466.3	c.1108del	p.Ile370LeufsTer17	frameshift_variant	5/24	ENST00000248633.9
PEX1	NM_001282677.2	c.1108del	p.Ile370LeufsTer17	frameshift_variant	5/23
PEX1	NM_001282678.2	c.484del	p.Ile162LeufsTer17	frameshift_variant	5/24
PEX1	XM_047420472.1	c.1108del	p.Ile370LeufsTer17	frameshift_variant	5/23

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PEX1	ENST00000248633.9	c.1108del	p.Ile370LeufsTer17	frameshift_variant	5/24	1	NM_000466.3	P1

Frequencies

GnomAD3 genomes AF: 0.00 AC: 2 AN: 150684 Hom.: 0 Cov.: 32 FAILED QC

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0000664

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: 0.0000148

Gnomad OTH AF: 0.00

GnomAD4 exome AF: 0.0000464 AC: 67 AN: 1444688 Hom.: 0 Cov.: 33 AF XY: 0.0000501 AC XY: 36 AN XY: 719120

Gnomad4 AFR exome AF: 0.000121

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.0000351

Gnomad4 FIN exome AF: 0.000132

Gnomad4 NFE exome AF: 0.0000474

Gnomad4 OTH exome AF: 0.0000167

GnomAD4 genome Data not reliable, filtered out with message: AS_VQSR AF: 0.0000133 AC: 2 AN: 150684 Hom.: 0 Cov.: 32 AF XY: 0.0000136 AC XY: 1 AN XY: 73498

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.0000664

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000148

Gnomad4 OTH AF: 0.00

Alfa AF: 0.000738 Hom.: 0

Bravo AF: 0.00000756

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:6

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Peroxisome biogenesis disorder 1A (Zellweger) Pathogenic:2

Likely pathogenic, criteria provided, single submitter	clinical testing	Counsyl	Oct 07, 2016	- -
Pathogenic, criteria provided, single submitter	clinical testing	Intergen, Intergen Genetics and Rare Diseases Diagnosis Center	Sep 05, 2023	- -

Zellweger spectrum disorders Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Invitae

Oct 17, 2023

This sequence change creates a premature translational stop signal (p.Ile370Leufs*17) 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). The frequency data for this variant in the population databases is considered unreliable, as metrics indicate poor data quality at this position in the gnomAD database. This variant has not been reported in the literature in individuals affected with PEX1-related conditions. ClinVar contains an entry for this variant (Variation ID: 371779). For these reasons, this variant has been classified as Pathogenic. -

Heimler syndrome 1 Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Baylor Genetics

Mar 18, 2024

- -

not provided Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories

Apr 03, 2020

- -

Peroxisome biogenesis disorder 1B Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Counsyl

Oct 07, 2016

- -

Computational scores

Source: dbNSFP v4.3

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

Other links and lift over

dbSNP: rs61750406; hg19: chr7-92146720;