Genetic Variant ABCA13:p.Arg44His (chr7-48193020-G-A) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_152701.5(ABCA13):c.131G>A(p.Arg44His) variant causes a missense change. The variant allele was found at a frequency of 0.0000301 in 1,527,832 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000027 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000030 ( 1 hom. )

Consequence

ABCA13
NM_152701.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.10

Variant links:

Genes affected

ABCA13 (HGNC:14638): (ATP binding cassette subfamily A member 13) In human, the ATP-binding cassette (ABC) family of transmembrane transporters has at least 48 genes and 7 gene subfamilies. This gene is a member of ABC gene subfamily A (ABCA). Genes within the ABCA family typically encode several thousand amino acids. Like other ABC transmembrane transporter proteins, this protein has 12 or more transmembrane alpha-helix domains that likely arrange to form a single central chamber with multiple substrate binding sites. It is also predicted to have two large extracellular domains and two nucleotide binding domains as is typical for ABCA proteins. Alternative splice variants have been described but their biological validity has not been demonstrated.[provided by RefSeq, Mar 2009]

ABCA13 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.858

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ABCA13	NM_152701.5 link	c.131G>A	p.Arg44His	missense_variant	Exon 2 of 62	ENST00000435803.6	NP_689914.3	Q86UQ4A0A0A0MT16

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ABCA13	ENST00000435803.6 link	c.131G>A	p.Arg44His	missense_variant	Exon 2 of 62	1	NM_152701.5	ENSP00000411096.1		A0A0A0MT16
ABCA13	ENST00000417403.5 link	n.131G>A		non_coding_transcript_exon_variant	Exon 2 of 18	2		ENSP00000409268.1		Q86UQ4-2

Frequencies

GnomAD3 genomes

AF:

0.0000336

AC:

AN:

148698

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000249

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000202

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000148

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000795

AC:

AN:

138436

Hom.:

AF XY:

0.0000809

AC XY:

AN XY:

74170

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000248

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.000134

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000354

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000305

AC:

AN:

1379032

Hom.:

Cov.:

AF XY:

0.0000338

AC XY:

AN XY:

680266

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000198

Gnomad4 ASJ exome

AF:

0.000120

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000167

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000130

Gnomad4 OTH exome

AF:

0.0000694

GnomAD4 genome

AF:

0.0000269

AC:

AN:

148800

Hom.:

Cov.:

AF XY:

0.0000553

AC XY:

AN XY:

72270

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.000202

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000148

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000359

Hom.:

Bravo

AF:

0.0000680

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jul 19, 2022

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.131G>A (p.R44H) alteration is located in exon 2 (coding exon 2) of the ABCA13 gene. This alteration results from a G to A substitution at nucleotide position 131, causing the arginine (R) at amino acid position 44 to be replaced by a histidine (H). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.50

BayesDel_addAF

Uncertain

0.12

BayesDel_noAF

Pathogenic

0.22

CADD

Pathogenic

DANN

Pathogenic

1.0

Eigen

Pathogenic

0.80

Eigen_PC

Pathogenic

0.75

FATHMM_MKL

Uncertain

0.88

LIST_S2

Benign

0.80

M_CAP

Pathogenic

0.43

MetaRNN

Pathogenic

0.86

MetaSVM

Pathogenic

1.1

PrimateAI

Uncertain

0.63

PROVEAN

Benign

-1.9

REVEL

Pathogenic

0.84

Sift

Pathogenic

0.0

Sift4G

Pathogenic

0.0

Vest4

0.72

MutPred

0.55

Gain of catalytic residue at L43 (P = 0.1593);

MVP

0.93

MPC

0.22

ClinPred

0.87

GERP RS

5.3

gMVP

0.62

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over