chrX-153736195-C-G

Position:

• chrX-153736195-C-G

Variant summary

Our verdict is Pathogenic. Variant got 18 ACMG points: 18P and 0B. PM1 PM2 PM5 PP3_Strong PP5_Very_Strong

The ENST00000218104.6(ABCD1):​c.1165C>G​(p.Arg389Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R389C) has been classified as Likely pathogenic.

• Frequency: Genomes: not found (cov: 24)
• Consequence: ABCD1 ENST00000218104.6 missense
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 2.24

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]

LOC124905226 (HGNC:):

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

ACMG classification

Verdict is Pathogenic. Variant got 18 ACMG points.

• PM1: In a hotspot region, there are 3 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 2 benign, 8 uncertain in ENST00000218104.6
• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chrX-153736195-C-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 623115.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.975
• PP5: Variant X-153736195-C-G is Pathogenic according to our data. Variant chrX-153736195-C-G is described in ClinVar as [Pathogenic]. Clinvar id is 11296.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ABCD1	NM_000033.4	c.1165C>G	p.Arg389Gly	missense_variant	3/10	ENST00000218104.6	NP_000024.2
LOC124905226	XR_007068350.1	n.4156G>C		non_coding_transcript_exon_variant	2/2
ABCD1	XM_047441916.1	c.1165C>G	p.Arg389Gly	missense_variant	3/11		XP_047297872.1
ABCD1	XM_047441917.1	c.1165C>G	p.Arg389Gly	missense_variant	3/8		XP_047297873.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ABCD1	ENST00000218104.6	c.1165C>G	p.Arg389Gly	missense_variant	3/10	1	NM_000033.4	ENSP00000218104	P1
PLXNB3-AS1	ENST00000434284.1	n.581-236G>C		intron_variant, non_coding_transcript_variant		3
ABCD1	ENST00000443684.2	n.168C>G		non_coding_transcript_exon_variant	2/6	3

Frequencies

GnomAD3 genomes Cov.: 24

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 24

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

Adrenoleukodystrophy Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Feb 04, 2022	ClinVar contains an entry for this variant (Variation ID: 11296). For these reasons, this variant has been classified as Pathogenic. This variant disrupts the p.Arg389 amino acid residue in ABCD1. Other variant(s) that disrupt this residue have been observed in individuals with ABCD1-related conditions (PMID: 7825602, 15811009), which suggests that this may be a clinically significant amino acid residue. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C45"). This missense change has been observed in individual(s) with adrenomyeloneuropathy (PMID: 8566952, 15811009, 22479560; Invitae). In at least one individual the variant was observed to be de novo. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces arginine, which is basic and polar, with glycine, which is neutral and non-polar, at codon 389 of the ABCD1 protein (p.Arg389Gly). -
Pathogenic, no assertion criteria provided	literature only	OMIM	Feb 01, 1996	- -

not provided Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Revvity Omics, Revvity

May 29, 2023

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.84
BayesDel_addAF	Pathogenic	0.57	D
BayesDel_noAF	Pathogenic	0.58
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.90	D
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.96	D
M_CAP	Pathogenic	0.36	D
MetaRNN	Pathogenic	0.97	D
MetaSVM	Uncertain	0.74	D
MutationAssessor	Uncertain	2.5	M
MutationTaster	Benign	1.0	A
PrimateAI	Uncertain	0.69	T
PROVEAN	Pathogenic	-5.9	D
REVEL	Pathogenic	0.88
Sift	Uncertain	0.0010	D
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	D
Vest4		0.85
MutPred		0.85		Loss of helix (P = 3e-04);
MVP		1.0
MPC		1.1
ClinPred		0.99	D
GERP RS		4.8
Varity_R		0.73
gMVP		1.0

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

Publications

LitVar

Other links and lift over

dbSNP: rs128624215; hg19: chrX-153001649;