22-18078507-T-A

Variant names:

• chr22-18078507-T-A
• rs61752131
• NM_001127649.3:c.131T>A
• PEX26 p.Leu44His

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2 PM5

The NM_001127649.3(PEX26):​c.131T>A​(p.Leu44His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000352 in 1,419,390 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L44F) has been classified as Benign.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000035 (0 hom.)
• Consequence: PEX26 NM_001127649.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.60
• Publications: 5 publications found

Genes affected

PEX26 (HGNC:22965): (peroxisomal biogenesis factor 26) This gene belongs to the peroxin-26 gene family. It is probably required for protein import into peroxisomes. It anchors PEX1 and PEX6 to peroxisome membranes, possibly to form heteromeric AAA ATPase complexes required for the import of proteins into peroxisomes. Defects in this gene are the cause of peroxisome biogenesis disorder complementation group 8 (PBD-CG8). PBD refers to a group of peroxisomal disorders arising from a failure of protein import into the peroxisomal membrane or matrix. The PBD group is comprised of four disorders: Zellweger syndrome (ZWS), neonatal adrenoleukodystrophy (NALD), infantile Refsum disease (IRD), and classical rhizomelic chondrodysplasia punctata (RCDP). Alternatively spliced transcript variants have been identified for this gene. [provided by RefSeq, Dec 2010]

PEX26 Gene-Disease associations (from GenCC):

• peroxisome biogenesis disorder

  Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
• peroxisome biogenesis disorder 7A (Zellweger)

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• peroxisome biogenesis disorder 7B

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Ambry Genetics
• Zellweger spectrum disorders

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ENSG00000288683 (HGNC:):

ACMG classification

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

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr22-18078507-T-C is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 3768062.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001127649.3. 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
	PEX26	NM_001127649.3	MANE Select	c.131T>A	p.Leu44His	missense	Exon 1 of 5	NP_001121121.1	Q7Z412-1
	PEX26	NM_017929.6		c.131T>A	p.Leu44His	missense	Exon 2 of 6	NP_060399.1	Q7Z412-1
	PEX26	NM_001199319.2		c.131T>A	p.Leu44His	missense	Exon 2 of 5	NP_001186248.1	Q7Z412-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PEX26	ENST00000399744.8	TSL:1 MANE Select	c.131T>A	p.Leu44His	missense	Exon 1 of 5	ENSP00000382648.4	Q7Z412-1
	PEX26	ENST00000329627.11	TSL:1	c.131T>A	p.Leu44His	missense	Exon 2 of 6	ENSP00000331106.5	Q7Z412-1
	PEX26	ENST00000428061.2	TSL:1	c.131T>A	p.Leu44His	missense	Exon 1 of 4	ENSP00000412441.2	Q7Z412-2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000575 AC: 1 AN: 173960 AF XY: 0.0000104

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000137

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000352 AC: 5 AN: 1419390 Hom.: 0 Cov.: 31 AF XY: 0.00000427 AC XY: 3 AN XY: 703178

African (AFR) AF: 0.00 AC: 0 AN: 32726

American (AMR) AF: 0.00 AC: 0 AN: 38834

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25454

East Asian (EAS) AF: 0.00 AC: 0 AN: 37634

South Asian (SAS) AF: 0.00 AC: 0 AN: 82402

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 43916

Middle Eastern (MID) AF: 0.000177 AC: 1 AN: 5646

European-Non Finnish (NFE) AF: 0.00000366 AC: 4 AN: 1093790

Other (OTH) AF: 0.00 AC: 0 AN: 58988

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Uncertain	0.090	D
BayesDel_noAF	Benign	-0.11
CADD	Uncertain	23
DANN	Benign	0.74
DEOGEN2	Benign	0.25	T
Eigen	Benign	-0.63
Eigen_PC	Benign	-0.62
FATHMM_MKL	Benign	0.14	N
LIST_S2	Benign	0.51	T
M_CAP	Uncertain	0.17	D
MetaRNN	Uncertain	0.58	D
MetaSVM	Uncertain	0.052	D
MutationAssessor	Uncertain	2.4	M
PhyloP100		1.6
PrimateAI	Uncertain	0.61	T
PROVEAN	Benign	-1.9	N
REVEL	Uncertain	0.36
Sift	Uncertain	0.023	D
Sift4G	Benign	0.077	T
PromoterAI		-0.15	Neutral
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.28
gMVP		0.51
Mutation Taster		=60/40	polymorphism

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

dbSNP: rs61752131;

hg19: chr22-18561273;