14-74292598-G-C

Variant names:

• chr14-74292598-G-C
• NM_005050.4:c.981C>G
• ABCD4 p.Leu327Leu

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP7

The NM_005050.4(ABCD4):​c.981C>G​(p.Leu327Leu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. L327L) has been classified as Benign.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ABCD4 NM_005050.4 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.91
• Publications: 0 publications found

Genes affected

ABCD4 (HGNC:68): (ATP binding cassette subfamily D member 4) 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. The function of this peroxisomal membrane protein is unknown. However, it is speculated that it may function as a heterodimer for another peroxisomal ABC transporter and, therefore, may modify the adrenoleukodystrophy phenotype. It may also play a role in the process of peroxisome biogenesis. Alternative splicing results in several protein-coding and non-protein-coding variants. [provided by RefSeq, Jul 2017]

ABCD4 Gene-Disease associations (from GenCC):

• methylmalonic acidemia with homocystinuria, type cblJ

  Inheritance: AR Classification: STRONG, MODERATE, SUPPORTIVE Submitted by: Orphanet, Labcorp Genetics (formerly Invitae), ClinGen, G2P, Ambry Genetics

ENSG00000258559 (HGNC:):

ACMG classification

Our verdict: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.47).
• BP7: Synonymous conserved (PhyloP=1.91 with no splicing effect.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005050.4. 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
	ABCD4	NM_005050.4	MANE Select	c.981C>G	p.Leu327Leu	synonymous	Exon 10 of 19	NP_005041.1	O14678
	ABCD4	NM_020325.3		c.981C>G	p.Leu327Leu	synonymous	Exon 10 of 18	NP_064730.1
	ABCD4	NM_001440752.1		c.981C>G	p.Leu327Leu	synonymous	Exon 10 of 18	NP_001427681.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ABCD4	ENST00000356924.9	TSL:1 MANE Select	c.981C>G	p.Leu327Leu	synonymous	Exon 10 of 19	ENSP00000349396.4	O14678
	ABCD4	ENST00000460308.6	TSL:1	n.*587C>G		non_coding_transcript_exon	Exon 8 of 9	ENSP00000436527.2	E9PI46
	ABCD4	ENST00000469672.5	TSL:1	n.*507C>G		non_coding_transcript_exon	Exon 7 of 9	ENSP00000434626.1	E9PPB6

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 48

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.47
CADD	Benign	10
DANN	Benign	0.66
PhyloP100		1.9

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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

hg19: chr14-74759301;