chrX-153743023-CGGGT-C

Variant names:

• chrX-153743023-CGGGT-C
• rs1557055253
• NM_000033.4:c.1820_1823delGTGG

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_000033.4(ABCD1):​c.1820_1823delGTGG​(p.Gly607AlafsTer28) variant causes a frameshift change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. G607G) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 24)
• Consequence: ABCD1 NM_000033.4 frameshift
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:4
• Conservation: PhyloP100: 10.0
• Publications: 0 publications found

Genes affected

ABCD1 (HGNC:61): (ATP binding cassette subfamily D member 1) The protein encoded by this gene is a member of the superfamily of ATP-binding cassette (ABC) transporters. ABC proteins transport various molecules across extra- and intra-cellular membranes. ABC genes are divided into seven distinct subfamilies (ABC1, MDR/TAP, MRP, ALD, OABP, GCN20, White). This protein is a member of the ALD subfamily, which is involved in peroxisomal import of fatty acids and/or fatty acyl-CoAs in the organelle. All known peroxisomal ABC transporters are half transporters which require a partner half transporter molecule to form a functional homodimeric or heterodimeric transporter. This peroxisomal membrane protein is likely involved in the peroxisomal transport or catabolism of very long chain fatty acids. Defects in this gene have been identified as the underlying cause of adrenoleukodystrophy, an X-chromosome recessively inherited demyelinating disorder of the nervous system. [provided by RefSeq, Jul 2008]

PLXNB3-AS1 (HGNC:40454): (PLXNB3 antisense RNA 1)

ACMG classification

Our verdict: Pathogenic. The variant received 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant X-153743023-CGGGT-C is Pathogenic according to our data. Variant chrX-153743023-CGGGT-C is described in ClinVar as Pathogenic. ClinVar VariationId is 528339.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_000033.4. 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
	ABCD1	NM_000033.4	MANE Select	c.1820_1823delGTGG	p.Gly607AlafsTer28	frameshift	Exon 8 of 10	NP_000024.2
	ABCD1	NM_001440747.1		c.2120_2123delGTGG	p.Gly707AlafsTer28	frameshift	Exon 9 of 11	NP_001427676.1
	PLXNB3-AS1	NR_199693.1		n.90-4449_90-4446delACCC		intron	N/A

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ABCD1	ENST00000218104.6	TSL:1 MANE Select	c.1820_1823delGTGG	p.Gly607AlafsTer28	frameshift	Exon 8 of 10	ENSP00000218104.3	P33897
	ABCD1	ENST00000862307.1		c.2120_2123delGTGG	p.Gly707AlafsTer28	frameshift	Exon 9 of 11	ENSP00000532366.1
	ABCD1	ENST00000862306.1		c.2090_2093delGTGG	p.Gly697AlafsTer28	frameshift	Exon 9 of 11	ENSP00000532365.1

Frequencies

GnomAD3 genomes Cov.: 24

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

GnomAD4 genome Cov.: 24

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
3	-	-	Adrenoleukodystrophy (3)
1	-	-	not provided (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		10
Mutation Taster		=1/199	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs1557055253; hg19: chrX-153008477;