rs122458139

chrX-109674403-G-AchrX-109674403-G-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3 PP5

The NM_001318510.2(ACSL4):c.1001C>T(p.Pro334Leu) variant causes a missense, splice region change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000184 in 1,085,808 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 1 hemizygotes in GnomAD. In-silico tool predicts a pathogenic outcome for this variant. 14/21 in silico tools predict a damaging outcome for this variant. 2/2 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 0.0000018 (0 hom. 1 hem.)
• Consequence: ACSL4 NM_001318510.2 missense, splice_region
• Scores: Splicing: ADA: 0.9669
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 10.0

Genes affected

ACSL4 (HGNC:3571): (acyl-CoA synthetase long chain family member 4) The protein encoded by this gene is an isozyme of the long-chain fatty-acid-coenzyme A ligase family. Although differing in substrate specificity, subcellular localization, and tissue distribution, all isozymes of this family convert free long-chain fatty acids into fatty acyl-CoA esters, and thereby play a key role in lipid biosynthesis and fatty acid degradation. This isozyme preferentially utilizes arachidonate as substrate. The absence of this enzyme may contribute to the cognitive disability or Alport syndrome. Alternative splicing of this gene generates multiple transcript variants. [provided by RefSeq, Jan 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: Splicing scoreres supports a deletorius effect: Scorers claiming Pathogenic: dbscSNV1_ADA, dbscSNV1_RF. No scorers claiming Uncertain. No scorers claiming Benign.
• PP5: Variant X-109674403-G-A is Pathogenic according to our data. Variant chrX-109674403-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 11566.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chrX-109674403-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ACSL4	NM_001318510.2	c.1001C>T	p.Pro334Leu	missense_variant, splice_region_variant	9/16	ENST00000672401.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ACSL4	ENST00000672401.1	c.1001C>T	p.Pro334Leu	missense_variant, splice_region_variant	9/16		NM_001318510.2	P4

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome AF: 0.00000184 AC: 2 AN: 1085808 Hom.: 0 Cov.: 27 AF XY: 0.00000284 AC XY: 1 AN XY: 352596

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000284

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000120

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 23

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Intellectual disability, X-linked 63 Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jan 01, 2003

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	1.0
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.27
Cadd	Pathogenic	33
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.48	T;T;.
FATHMM_MKL	Pathogenic	1.0	D
M_CAP	Pathogenic	0.73	D
MetaRNN	Pathogenic	0.99	D;D;D
MetaSVM	Uncertain	0.15	D
MutationAssessor	Pathogenic	4.2	H;H;.
MutationTaster	Benign	1.0	A;A;A
PrimateAI	Pathogenic	0.91	D
PROVEAN	Pathogenic	-9.5	D;D;D
REVEL	Pathogenic	0.74
Sift	Pathogenic	0.0	D;D;D
Sift4G	Pathogenic	0.0	D;D;D
Polyphen		1.0	D;D;.
Vest4		0.99
MutPred		0.93		Loss of sheet (P = 0.0054);Loss of sheet (P = 0.0054);.;
MVP		0.95
MPC		1.6
ClinPred		1.0	D
GERP RS		5.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		1.0
gMVP		0.98

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Pathogenic	0.97
dbscSNV1_RF	Pathogenic	0.85
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: rs122458139; hg19: chrX-108917632; COSMIC: COSV61615137;