chr6-42965734-GTCCAGTTCATCAAAGAAGA-G

Variant names:

• chr6-42965734-GTCCAGTTCATCAAAGAAGA-G
• rs62653602
• NM_000287.4:c.2399_2417delTCTTCTTTGATGAACTGGA

Variant summary

Our verdict is Likely pathogenic. The variant received 8 ACMG points: 8P and 0B. PVS1

The NM_000287.4(PEX6):​c.2399_2417delTCTTCTTTGATGAACTGGA​(p.Ile800ThrfsTer16) variant causes a frameshift change involving the alteration of a conserved nucleotide. 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 DEL_BIG, 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. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: PEX6 NM_000287.4 frameshift
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 9.32
• 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: Likely_pathogenic. The variant received 8 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
PEX6	NM_000287.4	c.2399_2417delTCTTCTTTGATGAACTGGA	p.Ile800ThrfsTer16	frameshift_variant	Exon 13 of 17	ENST00000304611.13	NP_000278.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
PEX6	ENST00000304611.13	c.2399_2417delTCTTCTTTGATGAACTGGA	p.Ile800ThrfsTer16	frameshift_variant	Exon 13 of 17	1	NM_000287.4	ENSP00000303511.8
PEX6	ENST00000244546.4	c.2152_2170delTCTTCTTTGATGAACTGGA	p.Ser718LeufsTer59	frameshift_variant	Exon 11 of 15	1		ENSP00000244546.4

Frequencies

GnomAD3 genomes Cov.: 32

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

GnomAD4 genome Cov.: 32

Alfa AF: 0.000214 Hom.: 0

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		9.3
Mutation Taster		=0/200	disease causing (fs/PTC)

Splicing

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Other links and lift over

dbSNP: rs62653602; hg19: chr6-42933472;