6-42967449-CC-TT

Variant names:

• chr6-42967449-CC-TT
• NM_000287.4:c.1802_1803delGGinsAA
• PEX6 p.Arg601Gln

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PS1_Moderate PM5

The NM_000287.4(PEX6):​c.1802_1803delGGinsAA​(p.Arg601Gln) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. It is difficult to determine the true allele frequency of this variant because it is of type MNV, and the frequency of such variant types in population databases may be underestimated and unreliable. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another nucleotide change resulting in the same amino acid substitution has been previously reported as Likely pathogenic in ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R601W) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 31)
• Consequence: PEX6 NM_000287.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.99
• Publications: 0 publications found

Genes affected

PEX6 (HGNC:8859): (peroxisomal biogenesis factor 6) This gene encodes a member of the AAA (ATPases associated with diverse cellular activities) family of ATPases. This member is a predominantly cytoplasmic protein, which plays a direct role in peroxisomal protein import and is required for PTS1 (peroxisomal targeting signal 1, a C-terminal tripeptide of the sequence ser-lys-leu) receptor activity. Mutations in this gene cause peroxisome biogenesis disorders of complementation group 4 and complementation group 6. Several transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Oct 2015]

PEX6 Gene-Disease associations (from GenCC):

• peroxisome biogenesis disorder

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• peroxisome biogenesis disorder 4A (Zellweger)

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P, Myriad Women’s Health
• peroxisome biogenesis disorder 4B

  Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
• Heimler syndrome 2

  Inheritance: AR Classification: MODERATE Submitted by: G2P
• autosomal recessive cerebellar ataxia-blindness-deafness syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• Zellweger spectrum disorders

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

• PS1: Transcript NM_000287.4 (PEX6) is affected with MISSENSE_VARIANT having same AA change as one Pathogenic present in ClinVar.
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr6-42967451-G-A is described in ClinVar as Pathogenic/Likely_pathogenic. ClinVar VariationId is 632484.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000287.4. 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
	PEX6	NM_000287.4	MANE Select	c.1802_1803delGGinsAA	p.Arg601Gln	missense	N/A	NP_000278.3
	PEX6	NM_001316313.2		c.1538_1539delGGinsAA	p.Arg513Gln	missense	N/A	NP_001303242.1	Q13608-3
	PEX6	NR_133009.2		n.1833_1834delGGinsAA		non_coding_transcript_exon	Exon 8 of 15

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PEX6	ENST00000304611.13	TSL:1 MANE Select	c.1802_1803delGGinsAA	p.Arg601Gln	missense	N/A	ENSP00000303511.8	Q13608-1
	PEX6	ENST00000244546.4	TSL:1	c.1802_1803delGGinsAA	p.Arg601Gln	missense	N/A	ENSP00000244546.4	Q13608-2
	PEX6	ENST00000858656.1		c.1802_1803delGGinsAA	p.Arg601Gln	missense	N/A	ENSP00000528715.1

Frequencies

GnomAD3 genomes Cov.: 31

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		7.0

Splicing

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: chr6-42935187;