rs781846746

Variant names:

• chrX-153725621-G-A
• rs781846746
• NM_000033.4:c.355G>A

Your query was ambiguous. Multiple possible variants found:

• chrX-153725621-G-A
• chrX-153725621-G-C
• chrX-153725621-G-T

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_000033.4(ABCD1):​c.355G>A​(p.Ala119Thr) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000000915 in 1,093,234 control chromosomes in the GnomAD database, with no homozygous occurrence. There are no hemizygote samples in GnomAD. In-silico tool predicts a benign outcome for this variant. 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. A119S) has been classified as Likely benign.

• Frequency:
  • Genomes: not found (cov: 26)
  • Exomes 𝑓: 9.1e-7 (0 hom. 0 hem.)
• Consequence: ABCD1 NM_000033.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 7.61
• 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]

ABCD1 Gene-Disease associations (from GenCC):

• adrenoleukodystrophy

  Inheritance: XL Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, G2P
• X-linked cerebral adrenoleukodystrophy

  Inheritance: XL Classification: DEFINITIVE, SUPPORTIVE Submitted by: Laboratory for Molecular Medicine, Orphanet
• hereditary spastic paraplegia

  Inheritance: XL Classification: STRONG Submitted by: Genomics England PanelApp
• Hirschsprung disease

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• adrenomyeloneuropathy

  Inheritance: XL Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM1: In a hotspot region, there are 7 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 8 uncertain in NM_000033.4
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3444285).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ABCD1	NM_000033.4	c.355G>A	p.Ala119Thr	missense_variant	Exon 1 of 10	ENST00000218104.6	NP_000024.2
ABCD1	NM_001440747.1	c.355G>A	p.Ala119Thr	missense_variant	Exon 1 of 11		NP_001427676.1
ABCD1	XM_047441917.1	c.355G>A	p.Ala119Thr	missense_variant	Exon 1 of 8		XP_047297873.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ABCD1	ENST00000218104.6	c.355G>A	p.Ala119Thr	missense_variant	Exon 1 of 10	1	NM_000033.4	ENSP00000218104.3
ABCD1	ENST00000370129.4	c.-201G>A		upstream_gene_variant		2		ENSP00000359147.3

Frequencies

GnomAD3 genomes Cov.: 26

GnomAD4 exome AF: 9.15e-7 AC: 1 AN: 1093234 Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0 AN XY: 359788

African (AFR) AF: 0.00 AC: 0 AN: 26335

American (AMR) AF: 0.00 AC: 0 AN: 34910

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 19192

East Asian (EAS) AF: 0.00 AC: 0 AN: 30065

South Asian (SAS) AF: 0.00 AC: 0 AN: 53473

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 39214

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 4119

European-Non Finnish (NFE) AF: 0.00000119 AC: 1 AN: 840061

Other (OTH) AF: 0.00 AC: 0 AN: 45865

GnomAD4 genome Cov.: 26

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.13
BayesDel_addAF	Uncertain	0.022	T
BayesDel_noAF	Benign	-0.21
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.66	D
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Benign	0.85	D
M_CAP	Uncertain	0.17	D
MetaRNN	Benign	0.34	T
MetaSVM	Uncertain	-0.19	T
MutationAssessor	Benign	-0.34	N
PhyloP100		7.6
PrimateAI	Uncertain	0.66	T
PROVEAN	Benign	-0.27	N
REVEL	Uncertain	0.41
Sift	Benign	0.041	D
Sift4G	Uncertain	0.040	D
Polyphen		0.016	B
Vest4		0.15
MutPred		0.66		Loss of methylation at R117 (P = 0.1128);
MVP		0.84
MPC		0.55
ClinPred		0.79	D
GERP RS		5.4
PromoterAI		0.011	Neutral
Varity_R		0.28
gMVP		0.76
Mutation Taster		=80/20	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

Other links and lift over

dbSNP: rs781846746; hg19: chrX-152991076; COSMIC: COSV54386836; COSMIC: COSV54386836;