2-43872255-C-T

Position:

chr2-43872255-C-T

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBP6

The NM_022437.3(ABCG8):c.1160C>T(p.Pro387Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000667 in 1,613,868 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00038 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00070 ( 1 hom. )

Consequence

ABCG8
NM_022437.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:7B:4

Conservation

PhyloP100: -1.89

Variant links:

Genes affected

ABCG8 (HGNC:13887): (ATP binding cassette subfamily G member 8) 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 White subfamily. The protein encoded by this gene functions to exclude non-cholesterol sterol entry at the intestinal level, promote excretion of cholesterol and sterols into bile, and to facilitate transport of sterols back into the intestinal lumen. It is expressed in a tissue-specific manner in the liver, intestine, and gallbladder. This gene is tandemly arrayed on chromosome 2, in a head-to-head orientation with family member ABCG5. Mutations in this gene may contribute to sterol accumulation and atherosclerosis, and have been observed in patients with sitosterolemia. [provided by RefSeq, Jul 2008]

ABCG8 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.039331645).

BP6

Variant 2-43872255-C-T is Benign according to our data. Variant chr2-43872255-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 500519.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=2, Uncertain_significance=6}. Variant chr2-43872255-C-T is described in Lovd as [Likely_benign].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ABCG8	NM_022437.3 linkuse as main transcript	c.1160C>T	p.Pro387Leu	missense_variant	8/13	ENST00000272286.4	NP_071882.1	Q9H221-1
ABCG8	NM_001357321.2 linkuse as main transcript	c.1157C>T	p.Pro386Leu	missense_variant	8/13		NP_001344250.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ABCG8	ENST00000272286.4 linkuse as main transcript	c.1160C>T	p.Pro387Leu	missense_variant	8/13	1	NM_022437.3	ENSP00000272286.2		Q9H221-1
ABCG8	ENST00000644611.1 linkuse as main transcript	c.1172C>T	p.Pro391Leu	missense_variant	8/9			ENSP00000495423.1		A0A2R8Y6M1

Frequencies

GnomAD3 genomes

AF:

0.000381

AC:

AN:

152178

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000622

Gnomad FIN

AF:

0.0000943

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000647

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000482

AC:

121

AN:

250998

Hom.:

AF XY:

0.000508

AC XY:

AN XY:

135710

show subpopulations

Gnomad AFR exome

AF:

0.000185

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.00101

Gnomad FIN exome

AF:

0.0000924

Gnomad NFE exome

AF:

0.000714

Gnomad OTH exome

AF:

0.000490

GnomAD4 exome

AF:

0.000697

AC:

1019

AN:

1461690

Hom.:

Cov.:

AF XY:

0.000690

AC XY:

502

AN XY:

727130

show subpopulations

Gnomad4 AFR exome

AF:

0.000119

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.000765

Gnomad4 FIN exome

AF:

0.0000939

Gnomad4 NFE exome

AF:

0.000820

Gnomad4 OTH exome

AF:

0.000447

GnomAD4 genome

AF:

0.000381

AC:

AN:

152178

Hom.:

Cov.:

AF XY:

0.000404

AC XY:

AN XY:

74336

show subpopulations

Gnomad4 AFR

AF:

0.000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000622

Gnomad4 FIN

AF:

0.0000943

Gnomad4 NFE

AF:

0.000647

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000655

Hom.:

Bravo

AF:

0.000382

TwinsUK

AF:

0.000809

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.00128

AC:

ExAC

AF:

0.000469

AC:

EpiCase

AF:

0.000927

EpiControl

AF:

0.000771

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:7Benign:4

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Uncertain:3Benign:3

Uncertain significance, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Aug 15, 2017	- -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Mayo Clinic Laboratories, Mayo Clinic	Sep 01, 2022	- -
Uncertain significance, criteria provided, single submitter	clinical testing	GeneDx	Nov 22, 2023	In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -
Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Dec 27, 2023	- -

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Women's Health and Genetics/Laboratory Corporation of America, LabCorp

Aug 06, 2024

Variant summary: ABCG8 c.1160C>T (p.Pro387Leu) results in a non-conservative amino acid change in the encoded protein sequence. Four of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00048 in 250998 control chromosomes in the gnomAD database, including 1 homozygotes. This frequency is not significantly higher than estimated for a pathogenic variant in ABCG8 causing Early Onset Coronary Artery Disease (0.00048 vs 0.005), allowing no conclusion about variant significance. c.1160C>T has been reported in the literature in individuals affected with Familial Hypercholesterolemia (Reeskamp_2020). These report(s) do not provide unequivocal conclusions about association of the variant with Early Onset Coronary Artery Disease. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. The following publication have been ascertained in the context of this evaluation (PMID: 32088153). ClinVar contains an entry for this variant (Variation ID: 500519). Based on the evidence outlined above, the variant was classified as uncertain significance. -

Sitosterolemia 1

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Revvity Omics, Revvity

Sep 25, 2023

- -

Sitosterolemia;C1969115:Gallbladder disease 4

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Oct 31, 2018

- -

ABCG8-related disorder

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Aug 19, 2024

The ABCG8 c.1160C>T variant is predicted to result in the amino acid substitution p.Pro387Leu. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.10% of alleles in individuals of South Asian descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Cardiovascular phenotype

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

May 17, 2024

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.068

BayesDel_addAF

Benign

-0.48

BayesDel_noAF

Benign

-0.53

CADD

Benign

0.023

DANN

Benign

0.74

DEOGEN2

Benign

0.31

.;T;T

Eigen

Benign

-1.7

Eigen_PC

Benign

-1.9

FATHMM_MKL

Benign

0.012

LIST_S2

Benign

0.42

T;.;T

M_CAP

Uncertain

0.11

MetaRNN

Benign

0.039

T;T;T

MetaSVM

Benign

-0.48

MutationAssessor

Benign

1.1

.;L;L

PrimateAI

Benign

0.22

PROVEAN

Benign

-1.0

.;.;N

REVEL

Benign

0.26

Sift

Benign

0.23

.;.;T

Sift4G

Benign

0.28

.;.;T

Polyphen

0.49

.;P;P

Vest4

0.10

MVP

0.42

MPC

0.016

ClinPred

0.022

GERP RS

-9.6

Varity_R

0.027

gMVP

0.41

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