Genetic Variant ABCB8:p.Arg7Pro (chr7-151028535-G-C) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_007188.5(ABCB8):c.20G>C(p.Arg7Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,526 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R7L) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

ABCB8
NM_007188.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 3.00

Publications

0 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:

ENSG00000243433 (HGNC:):

ENSG00000243433 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ABCB8	NM_007188.5 link	c.20G>C	p.Arg7Pro	missense_variant	Exon 1 of 16	ENST00000358849.9	NP_009119.2	Q9NUT2-2
ABCB8	NM_001282291.2 link	c.20G>C	p.Arg7Pro	missense_variant	Exon 1 of 17		NP_001269220.1	Q9NUT2-1
ABCB8	NM_001282292.2 link	c.20G>C	p.Arg7Pro	missense_variant	Exon 1 of 16		NP_001269221.1	Q9NUT2-3
ABCB8	NM_001282293.2 link	c.69G>C	p.Ser23Ser	synonymous_variant	Exon 1 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.20G>C	p.Arg7Pro	missense_variant	Exon 1 of 16	1	NM_007188.5	ENSP00000351717.4		Q9NUT2-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461526

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727052

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33472

American (AMR)

AF:

0.00

AC:

AN:

44664

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26124

East Asian (EAS)

AF:

0.00

AC:

AN:

39692

South Asian (SAS)

AF:

0.00

AC:

AN:

86196

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53356

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5736

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111938

Other (OTH)

AF:

0.00

AC:

AN:

60348

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.550

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.39

BayesDel_addAF

Pathogenic

0.39

BayesDel_noAF

Pathogenic

0.33

CADD

Pathogenic

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.097

.;.;T;.;.;T

Eigen

Uncertain

0.55

Eigen_PC

Uncertain

0.57

FATHMM_MKL

Uncertain

0.87

LIST_S2

Uncertain

0.92

D;D;D;D;D;D

M_CAP

Uncertain

0.21

MetaRNN

Uncertain

0.74

D;D;D;D;D;D

MetaSVM

Pathogenic

0.96

MutationAssessor

Benign

1.9

.;L;L;L;.;.

PhyloP100

3.0

PrimateAI

Uncertain

0.69

PROVEAN

Pathogenic

-7.0

D;N;N;N;N;N

REVEL

Uncertain

0.57

Sift

Pathogenic

0.0

D;D;D;D;D;D

Sift4G

Pathogenic

0.0

D;D;D;D;D;D

Polyphen

1.0

.;D;D;.;.;D

Vest4

0.47, 0.46, 0.47, 0.48, 0.48

MutPred

0.43

Loss of MoRF binding (P = 0);Loss of MoRF binding (P = 0);Loss of MoRF binding (P = 0);Loss of MoRF binding (P = 0);Loss of MoRF binding (P = 0);Loss of MoRF binding (P = 0);

MVP

0.99

MPC

1.0

ClinPred

1.0

GERP RS

5.0

PromoterAI

-0.037

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.68

gMVP

0.58

Mutation Taster

=79/21

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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chr7-151028535-G-C

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over