Genetic Variant NM_000318.3:c.669G>T (chr8-76983510-C-A) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_000318.3(PEX2):c.669G>T(p.Trp223Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,736 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

PEX2
NM_000318.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.15

Publications

0 publications found

Variant links:

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]

PEX2 Gene-Disease associations (from GenCC):

peroxisome biogenesis disorder
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
peroxisome biogenesis disorder 5A (Zellweger)
Inheritance: AR Classification: DEFINITIVE Submitted by: G2P, Myriad Women’s Health
peroxisome biogenesis disorder 5B
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
Zellweger spectrum disorders
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

PEX2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000318.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
PEX2	NM_000318.3	MANE Select	c.669G>T	p.Trp223Cys	missense	Exon 4 of 4	NP_000309.2	P28328
PEX2	NM_001079867.2		c.669G>T	p.Trp223Cys	missense	Exon 3 of 3	NP_001073336.2	P28328
PEX2	NM_001172086.2		c.669G>T	p.Trp223Cys	missense	Exon 5 of 5	NP_001165557.2	P28328

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
PEX2	ENST00000357039.9	TSL:1 MANE Select	c.669G>T	p.Trp223Cys	missense	Exon 4 of 4	ENSP00000349543.4	P28328
PEX2	ENST00000522527.5	TSL:1	c.669G>T	p.Trp223Cys	missense	Exon 3 of 3	ENSP00000428638.1	P28328
PEX2	ENST00000520103.5	TSL:2	c.669G>T	p.Trp223Cys	missense	Exon 3 of 3	ENSP00000428590.1	P28328

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461736

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727174

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53330

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111952

Other (OTH)

AF:

0.00

AC:

AN:

60394

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.29

BayesDel_addAF

Pathogenic

0.22

BayesDel_noAF

Uncertain

0.080

CADD

Uncertain

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.77

Eigen

Uncertain

0.53

Eigen_PC

Uncertain

0.52

FATHMM_MKL

Uncertain

0.87

LIST_S2

Benign

0.77

M_CAP

Benign

0.0098

MetaRNN

Uncertain

0.52

MetaSVM

Benign

-0.83

MutationAssessor

Uncertain

2.0

PhyloP100

2.1

PrimateAI

Uncertain

0.56

PROVEAN

Uncertain

-2.4

REVEL

Uncertain

0.36

Sift

Benign

0.050

Sift4G

Uncertain

0.043

Polyphen

0.99

Vest4

0.27

MutPred

0.76

Loss of catalytic residue at P226 (P = 0.0291)

MVP

0.82

ClinPred

0.92

GERP RS

5.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.51

gMVP

0.88

Mutation Taster

=65/35

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over