12-7208556-A-T

Variant names:

• chr12-7208556-A-T
• NM_001351132.2:c.1281A>T
• PEX5 p.Arg427Arg

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_001351132.2(PEX5):​c.1281A>T​(p.Arg427Arg) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PEX5 NM_001351132.2 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.457
• Publications: 0 publications found

Genes affected

PEX5 (HGNC:9719): (peroxisomal biogenesis factor 5) The product of this gene binds to the C-terminal PTS1-type tripeptide peroxisomal targeting signal (SKL-type) and plays an essential role in peroxisomal protein import. Peroxins (PEXs) are proteins that are essential for the assembly of functional peroxisomes. The peroxisome biogenesis disorders (PBDs) are a group of genetically heterogeneous autosomal recessive, lethal diseases characterized by multiple defects in peroxisome function. The peroxisomal biogenesis disorders are a heterogeneous group with at least 14 complementation groups and with more than 1 phenotype being observed in cases falling into particular complementation groups. Although the clinical features of PBD patients vary, cells from all PBD patients exhibit a defect in the import of one or more classes of peroxisomal matrix proteins into the organelle. Defects in this gene are a cause of neonatal adrenoleukodystrophy (NALD), a cause of Zellweger syndrome (ZWS) as well as may be a cause of infantile Refsum disease (IRD). Alternatively spliced transcript variants encoding different isoforms have been identified. [provided by RefSeq, Oct 2008]

PEX5 Gene-Disease associations (from GenCC):

• peroxisome biogenesis disorder

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• peroxisome biogenesis disorder 2A (Zellweger)

  Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: G2P, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• peroxisome biogenesis disorder 2B

  Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
• rhizomelic chondrodysplasia punctata type 5

  Inheritance: AR Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Ambry Genetics
• Zellweger spectrum disorders

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.63).
• BP7: Synonymous conserved (PhyloP=-0.457 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001351132.2. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PEX5	NM_001351132.2	MANE Select	c.1281A>T	p.Arg427Arg	synonymous	Exon 13 of 16	NP_001338061.1	P50542-1
	PEX5	NM_001131023.2		c.1326A>T	p.Arg442Arg	synonymous	Exon 13 of 16	NP_001124495.1	P50542-4
	PEX5	NM_001131025.2		c.1281A>T	p.Arg427Arg	synonymous	Exon 13 of 16	NP_001124497.1	A0A0S2Z4H1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PEX5	ENST00000675855.1	MANE Select	c.1281A>T	p.Arg427Arg	synonymous	Exon 13 of 16	ENSP00000502374.1	P50542-1
	PEX5	ENST00000420616.6	TSL:1	c.1281A>T	p.Arg427Arg	synonymous	Exon 13 of 16	ENSP00000410159.2	P50542-1
	PEX5	ENST00000266564.7	TSL:1	c.1257A>T	p.Arg419Arg	synonymous	Exon 12 of 15	ENSP00000266564.3	P50542-3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.63
CADD	Benign	5.7
DANN	Benign	0.69
PhyloP100		-0.46

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr12-7361152;