Genetic Variant ABCB8:p.Val144Met (chr7-151034294-G-A) – ACMG Classification: Likely_benign (-1 pts)

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 0P and 1B. BP4

The NM_007188.5(ABCB8):c.430G>A(p.Val144Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000417 in 1,613,294 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00023 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00044 ( 0 hom. )

Consequence

ABCB8
NM_007188.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.18

Publications

9 publications found

Variant links:

Genes affected

ABCB8 (HGNC:49): (ATP binding cassette subfamily B member 8) This nuclear gene encodes a multi-pass membrane protein that is targeted to the mitochondrial inner membrane. The encoded protein is an ATP-dependent transporter that may mediate the passage of organic and inorganic molecules out of the mitochondria. Loss of function of the related gene in mouse results in a disruption of iron homeostasis between the mitochondria and cytosol. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Aug 2013]

ABCB8 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.38897207).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ABCB8	NM_007188.5 link	c.430G>A	p.Val144Met	missense_variant	Exon 3 of 16	ENST00000358849.9	NP_009119.2	Q9NUT2-2
ABCB8	NM_001282291.2 link	c.481G>A	p.Val161Met	missense_variant	Exon 4 of 17		NP_001269220.1	Q9NUT2-1
ABCB8	NM_001282292.2 link	c.430G>A	p.Val144Met	missense_variant	Exon 3 of 16		NP_001269221.1	Q9NUT2-3
ABCB8	NM_001282293.2 link	c.166G>A	p.Val56Met	missense_variant	Exon 2 of 15		NP_001269222.1	Q9NUT2-4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ABCB8	ENST00000358849.9 link	c.430G>A	p.Val144Met	missense_variant	Exon 3 of 16	1	NM_007188.5	ENSP00000351717.4		Q9NUT2-2

Frequencies

GnomAD3 genomes

AF:

0.000230

AC:

AN:

152160

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000145

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.000426

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000252

AC:

AN:

250472

AF XY:

0.000244

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000547

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000437

AC:

638

AN:

1461134

Hom.:

Cov.:

AF XY:

0.000420

AC XY:

305

AN XY:

726878

show subpopulations

African (AFR)

AF:

0.000119

AC:

AN:

33478

American (AMR)

AF:

0.00

AC:

AN:

44698

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26102

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39698

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86248

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52868

Middle Eastern (MID)

AF:

0.000174

AC:

AN:

5752

European-Non Finnish (NFE)

AF:

0.000558

AC:

621

AN:

1111916

Other (OTH)

AF:

0.000166

AC:

AN:

60374

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.495

Heterozygous variant carriers

123

164

205

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000230

AC:

AN:

152160

Hom.:

Cov.:

AF XY:

0.000202

AC XY:

AN XY:

74316

show subpopulations

African (AFR)

AF:

0.000145

AC:

AN:

41430

American (AMR)

AF:

0.00

AC:

AN:

15280

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5198

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10620

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.000426

AC:

AN:

68014

Other (OTH)

AF:

0.00

AC:

AN:

2090

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.516

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000441

Hom.:

Bravo

AF:

0.000234

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000778

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000698

AC:

ExAC

AF:

0.000255

AC:

EpiCase

AF:

0.000491

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Aug 12, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.430G>A (p.V144M) alteration is located in exon 3 (coding exon 3) of the ABCB8 gene. This alteration results from a G to A substitution at nucleotide position 430, causing the valine (V) at amino acid position 144 to be replaced by a methionine (M). 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

Benign

0.24

BayesDel_addAF

Benign

-0.20

BayesDel_noAF

Benign

-0.19

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.18

.;.;T;.;.;T

Eigen

Uncertain

0.44

Eigen_PC

Uncertain

0.43

FATHMM_MKL

Uncertain

0.87

LIST_S2

Uncertain

0.97

D;D;D;D;D;D

M_CAP

Uncertain

0.15

MetaRNN

Benign

0.39

T;T;T;T;T;T

MetaSVM

Uncertain

0.37

MutationAssessor

Benign

1.9

.;.;M;.;.;.

PhyloP100

2.2

PrimateAI

Uncertain

0.62

PROVEAN

Benign

-0.080

N;N;N;N;N;N

REVEL

Uncertain

0.42

Sift

Benign

0.11

T;T;T;T;T;T

Sift4G

Benign

0.098

T;T;T;T;D;D

Polyphen

0.99, 1.0, 1.0

.;D;D;.;.;D

Vest4

0.51

MVP

0.98

MPC

0.68

ClinPred

0.059

GERP RS

4.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.071

gMVP

0.48

Mutation Taster

=73/27

polymorphism

(source)

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

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chr7-151034294-G-A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over