12-21875696-C-T

Position:

chr12-21875696-C-T

Variant summary

Our verdict is Benign. Variant got -12 ACMG points: 1P and 13B. PP2BP4_StrongBP6BS1BS2

The NM_020297.4(ABCC9):c.2050G>A(p.Gly684Ser) variant causes a missense change. The variant allele was found at a frequency of 0.000727 in 1,612,698 control chromosomes in the GnomAD database, including 5 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00047 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00075 ( 5 hom. )

Consequence

ABCC9
NM_020297.4 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:14

Conservation

PhyloP100: 5.46

Variant links:

Genes affected

ABCC9 (HGNC:60): (ATP binding cassette subfamily C member 9) 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 MRP subfamily which is involved in multi-drug resistance. This protein is thought to form ATP-sensitive potassium channels in cardiac, skeletal, and vascular and non-vascular smooth muscle. Protein structure suggests a role as the drug-binding channel-modulating subunit of the extra-pancreatic ATP-sensitive potassium channels. Mutations in this gene are associated with cardiomyopathy dilated type 1O. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Apr 2011]

ABCC9 links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -12 ACMG points.

PP2

Missense variant in gene, where missense usually causes diseases (based on misZ statistic), ABCC9. . Gene score misZ 4.9694 (greater than the threshold 3.09). Trascript score misZ 7.023 (greater than threshold 3.09). GenCC has associacion of gene with hypertrichotic osteochondrodysplasia Cantu type, dilated cardiomyopathy, acromegaloid facial appearance syndrome, Brugada syndrome, atrial fibrillation, familial, 12, intellectual disability and myopathy syndrome, dilated cardiomyopathy 1O, familial isolated dilated cardiomyopathy, hypertrichosis-acromegaloid facial appearance syndrome.

BP4

Computational evidence support a benign effect (MetaRNN=0.011582732).

BP6

Variant 12-21875696-C-T is Benign according to our data. Variant chr12-21875696-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 45397.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=8, Benign=1, Uncertain_significance=2}. Variant chr12-21875696-C-T is described in Lovd as [Benign]. Variant chr12-21875696-C-T is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population sas. gnomad4 allele frequency = 0.000466 (71/152250) while in subpopulation SAS AF= 0.00228 (11/4824). AF 95% confidence interval is 0.00128. There are 0 homozygotes in gnomad4. There are 32 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 5 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ABCC9	NM_020297.4 linkuse as main transcript	c.2050G>A	p.Gly684Ser	missense_variant	17/40	ENST00000261200.9	NP_064693.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ABCC9	ENST00000261200.9 linkuse as main transcript	c.2050G>A	p.Gly684Ser	missense_variant	17/40	5	NM_020297.4	ENSP00000261200	P4	O60706-2
	ENST00000539874.1 linkuse as main transcript	n.412+6034C>T		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes

AF:

0.000467

AC:

AN:

152132

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000217

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00228

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000676

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.000837

AC:

210

AN:

250964

Hom.:

AF XY:

0.000950

AC XY:

129

AN XY:

135744

show subpopulations

Gnomad AFR exome

AF:

0.000124

Gnomad AMR exome

AF:

0.000145

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000544

Gnomad SAS exome

AF:

0.00353

Gnomad FIN exome

AF:

0.0000462

Gnomad NFE exome

AF:

0.000775

Gnomad OTH exome

AF:

0.000816

GnomAD4 exome

AF:

0.000755

AC:

1102

AN:

1460448

Hom.:

Cov.:

AF XY:

0.000859

AC XY:

624

AN XY:

726674

show subpopulations

Gnomad4 AFR exome

AF:

0.0000598

Gnomad4 AMR exome

AF:

0.000246

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.00346

Gnomad4 FIN exome

AF:

0.0000187

Gnomad4 NFE exome

AF:

0.000668

Gnomad4 OTH exome

AF:

0.000630

GnomAD4 genome

AF:

0.000466

AC:

AN:

152250

Hom.:

Cov.:

AF XY:

0.000430

AC XY:

AN XY:

74446

show subpopulations

Gnomad4 AFR

AF:

0.000217

Gnomad4 AMR

AF:

0.000262

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00228

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000676

Gnomad4 OTH

AF:

0.000473

Alfa

AF:

0.000707

Hom.:

Bravo

AF:

0.000389

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.00116

AC:

ExAC

AF:

0.000972

AC:

118

Asia WGS

AF:

0.00173

AC:

AN:

3478

EpiCase

AF:

0.000818

EpiControl

AF:

0.00101

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:14

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not provided

Benign:5

Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Likely benign, criteria provided, single submitter	research	Biesecker Lab/Clinical Genomics Section, National Institutes of Health	Jun 24, 2013	- -
Likely benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Aug 21, 2023	- -
Likely benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -

not specified

Benign:4

Likely benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Apr 15, 2015	p.Gly684Ser in exon 15 of ABCC9: This variant is not expected to have clinical s ignificance because it has been identified in 0.3% (57/16406) of South Asian chr omosomes by the Exome Aggregation Consortium (ExAC, http://exac.broadinstitute.o rg; dbSNP rs148174226). -
Likely benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Jan 14, 2015	- -
Likely benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Mar 23, 2020	Variant summary: ABCC9 c.2050G>A (p.Gly684Ser) results in a non-conservative amino acid change located in the ABC transporter-like of the encoded protein sequence. Three of five in-silico tools predict a benign effect of the variant on protein function. The variant allele was found at a frequency of 0.00084 in 250964 control chromosomes. The observed variant frequency is approximately 33.47 fold of the estimated maximal expected allele frequency for a pathogenic variant in ABCC9 causing Cardiomyopathy phenotype (2.5e-05), strongly suggesting that the variant is benign. c.2050G>A has been reported in the literature in individuals affected with DCM (Pugh_2014). This report does not provide unequivocal conclusions about association of the variant with Cardiomyopathy. To our knowledge, no experimental evidence demonstrating an impact on protein function has been reported. Five clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar after 2014 without evidence for independent evaluation. All laboratories classified the variant as likely benign. Based on the evidence outlined above, the variant was classified as likely benign. -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -

Dilated cardiomyopathy 1O

Uncertain:1Benign:1

Likely benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 21, 2024	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 12, 2018	This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Hypertrichotic osteochondrodysplasia Cantu type

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -

Arrhythmogenic right ventricular cardiomyopathy

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Center for Advanced Laboratory Medicine, UC San Diego Health, University of California San Diego

Mar 25, 2019

- -

Cardiomyopathy

Benign:1

Benign, criteria provided, single submitter

clinical testing

CHEO Genetics Diagnostic Laboratory, Children's Hospital of Eastern Ontario

Nov 30, 2017

- -

ABCC9-related disorder

Benign:1

Likely benign, no assertion criteria provided

clinical testing

PreventionGenetics, part of Exact Sciences

Jan 23, 2020

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Cardiovascular phenotype

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

May 30, 2018

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

0.086

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.17

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.30

.;.;T

Eigen

Benign

-0.25

Eigen_PC

Benign

-0.037

FATHMM_MKL

Uncertain

0.80

LIST_S2

Uncertain

0.88

D;D;D

M_CAP

Uncertain

0.13

MetaRNN

Benign

0.012

T;T;T

MetaSVM

Uncertain

-0.26

MutationAssessor

Benign

-0.20

N;.;N

MutationTaster

Benign

0.97

D;D;D

PrimateAI

Uncertain

0.63

PROVEAN

Benign

-1.5

N;N;N

REVEL

Benign

0.23

Sift

Benign

0.24

T;T;T

Sift4G

Benign

0.34

T;T;T

Polyphen

0.0070

B;.;B

Vest4

0.36

MVP

0.77

MPC

0.68

ClinPred

0.023

GERP RS

4.7

Varity_R

0.25

gMVP

0.48

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

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