8-76980923-G-A

Position:

• chr8-76980923-G-A

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_Strong BP6_Very_Strong BA1

The NM_000318.3(PEX2):​c.*2338C>T variant causes a 3 prime UTR change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0348 in 152,162 control chromosomes in the GnomAD database, including 140 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

• Frequency:
  • Genomes: 𝑓 0.035 (140 hom., cov: 32)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: PEX2 NM_000318.3 3_prime_UTR
• Clinical Significance: Benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -0.116

Genes affected

PEX2 (HGNC:9717): (peroxisomal biogenesis factor 2) This gene encodes an integral peroxisomal membrane protein required for peroxisome biogenesis. The protein is thought to be involved in peroxisomal matrix protein import. Mutations in this gene result in one form of Zellweger syndrome and infantile Refsum disease. Alternative splicing results in multiple transcript variants encoding the same protein. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Benign. Variant got -20 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.89).
• BP6: Variant 8-76980923-G-A is Benign according to our data. Variant chr8-76980923-G-A is described in ClinVar as [Benign]. Clinvar id is 363778.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• BA1: GnomAd4 highest subpopulation (AMR) allele frequency at 95% confidence interval = 0.0816 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
PEX2	NM_000318.3	c.*2338C>T		3_prime_UTR_variant	4/4	ENST00000357039.9
PEX2	NM_001079867.2	c.*2338C>T		3_prime_UTR_variant	3/3
PEX2	NM_001172086.2	c.*2338C>T		3_prime_UTR_variant	5/5
PEX2	NM_001172087.2	c.*2338C>T		3_prime_UTR_variant	3/3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
PEX2	ENST00000357039.9	c.*2338C>T		3_prime_UTR_variant	4/4	1	NM_000318.3	P1

Frequencies

GnomAD3 genomes AF: 0.0349 AC: 5299 AN: 152044 Hom.: 140 Cov.: 32

Gnomad AFR AF: 0.0228

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.0857

Gnomad ASJ AF: 0.0184

Gnomad EAS AF: 0.00116

Gnomad SAS AF: 0.0203

Gnomad FIN AF: 0.0322

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0364

Gnomad OTH AF: 0.0301

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 16 Hom.: 0 Cov.: 0 AF XY: 0.00 AC XY: 0 AN XY: 8

Gnomad4 NFE exome AF: 0.00

GnomAD4 genome AF: 0.0348 AC: 5299 AN: 152162 Hom.: 140 Cov.: 32 AF XY: 0.0353 AC XY: 2624 AN XY: 74388

Gnomad4 AFR AF: 0.0228

Gnomad4 AMR AF: 0.0854

Gnomad4 ASJ AF: 0.0184

Gnomad4 EAS AF: 0.00116

Gnomad4 SAS AF: 0.0208

Gnomad4 FIN AF: 0.0322

Gnomad4 NFE AF: 0.0364

Gnomad4 OTH AF: 0.0298

Alfa AF: 0.0348 Hom.: 11

Bravo AF: 0.0372

Asia WGS AF: 0.0110 AC: 42 AN: 3478

ClinVar

Significance: Benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Benign:1

Benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

-

- -

Peroxisome biogenesis disorder 5A (Zellweger) Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 13, 2018

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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.89
CADD	Benign	1.4
DANN	Benign	0.33

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: rs56231626; hg19: chr8-77893159;