• 3
    Haplo
    Score
  • 0
    Triplo
    Score

Gene Facts External Data Attribution

HGNC Symbol
ABCD1 (HGNC:61) HGNC Entrez Ensembl OMIM UCSC Uniprot GeneReviews LOVD LSDB ClinVar
HGNC Name
ATP binding cassette subfamily D member 1
Gene type
protein-coding gene
Locus type
gene with protein product
Previous symbols
ALD
Alias symbols
AMN, ALDP, adrenoleukodystrophy
%HI
59.98(Read more about the DECIPHER Haploinsufficiency Index)
pLI
1(Read more about gnomAD pLI score)
LOEUF
0.15(Read more about gnomAD LOEUF score)
Cytoband
Xq28
Genomic Coordinates
GRCh37/hg19: chrX:152990311-153010209 NCBI Ensembl UCSC
GRCh38/hg38: chrX:153724856-153744755 NCBI Ensembl UCSC
MANE Select Transcript
NM_000033.4 ENST00000218104.6 (Read more about MANE Select)
Function
ATP-dependent transporter of the ATP-binding cassette (ABC) family involved in the transport of very long chain fatty acid (VLCFA)- CoA from the cytosol to the peroxisome lumen (PubMed:11248239, PubMed:15682271, PubMed:16946495, PubMed:18757502, PubMed:21145416, PubMed:23671276, PubMed:29397936, PubMed:33500543). Coupled to the ATP- dependent transporter activity has also a fatty acyl-CoA thioesterase activity (ACOT) and hydrolyzes VLCFA-CoA into VLCFA prior their ATP- dependent transport into p... (Source: Uniprot)

Dosage Sensitivity Summary (Gene)

Dosage ID:
ISCA-2444
ClinGen Curation ID:
CCID:006599
Curation Status:
Complete
Issue Type:
Dosage Curation - Gene
Haploinsufficiency:
Sufficient Evidence for Haploinsufficiency (3)
Triplosensitivity:
No Evidence for Triplosensitivity (0)
Last Evaluated:
12/02/2020

Haploinsufficiency (HI) Score Details

HI Score:
3
HI Evidence Strength:
Sufficient Evidence for Haploinsufficiency (Disclaimer)
HI Disease:
HI Evidence:
  • PUBMED: 8040304
    Fanen et al. (1994) used denaturing gradient gel electrophoresis to analyze exons 6 and 8, which encode the ATP binding domain, in 50 affected ALD patients. Three patients were identified with single or two base pair deletions (1937delC, 2177delTA, 2204delG) that result in a frameshift and are predicted to result in premature termination. The study also identified a patient with a nonsense variant (R464X).
  • PUBMED: 23835273
    Hung et al. (2013) performed sequencing analysis on 4 families with X linked adrenoleukodystrophy. Proband ADL-1 was found to have c.1272g>a splice donor site variant that was predicted to result in the activation of a cryptic splice site in exon 4 and resultin in a truncated ABCD1 (p.Val425fs*92)
  • PUBMED: 25835712
    Kallabi et al. (2015) described a Tunisian male with X-ALD identified a de novo splice site variant c.1780+2T>G predicted to activate a new splice donor site leading to a frameshift and premature stop.
  • PUBMED: 7825602
    Ligtenberg et al. (1995) performed sequencing analysis on 28 independent kindreds with X-linked adrenoleukodystrophy. In the analysis 4 nonsense, 5 frameshifts and 2 splice variants were identified.
HI Evidence Comments:
Additional PMIDs: 7581394, 8566952, 11748843, 7825602 Pathogenic variants in ABCD1 cause X-linked adrenoleukodystrophy in males, which affects the nervous system and the adrenal cortex. Phenotypic variability in males and age of onset are variable from childhood to adult onset ( see PMID 11204280). The clinical presentation can vary within the same family. Although the variation in clinical phenotypes is great , neurologic manifestations are present in nearly all males by adulthood. Female carriers can develop mild to moderate spastic paraparesis in middle age or later. See Gene Reviews.
NOTE:

The loss-of-function and triplosensitivity ratings for genes on the X chromosome are made in the context of a male genome to account for the effects of hemizygous duplications or nullizygous deletions. In contrast, disruption of some genes on the X chromosome causes male lethality and the ratings of dosage sensitivity instead take into account the phenotype in female individuals. Factors that may affect the severity of phenotypes associated with X-linked disorders include the presence of variable copies of the X chromosome (i.e. 47,XXY or 45,X) and skewed X-inactivation in females.

Triplosensitivity (TS) Score Details

TS Score:
0
TS Evidence Strength:
No Evidence for Triplosensitivity (Disclaimer)
NOTE:

The loss-of-function and triplosensitivity ratings for genes on the X chromosome are made in the context of a male genome to account for the effects of hemizygous duplications or nullizygous deletions. In contrast, disruption of some genes on the X chromosome causes male lethality and the ratings of dosage sensitivity instead take into account the phenotype in female individuals. Factors that may affect the severity of phenotypes associated with X-linked disorders include the presence of variable copies of the X chromosome (i.e. 47,XXY or 45,X) and skewed X-inactivation in females.

Genomic View

Select assembly: (NC_000023.10) (NC_000023.11)