12-21864490-C-T

Variant names:

Variant summary

Our verdict is Benign. Variant got -7 ACMG points: 0P and 7B. BP4_ModerateBP6BS1

The NM_020297.4(ABCC9):c.2199-13G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000963 in 1,567,680 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 Conflicting classifications of pathogenicity (no stars).

Frequency

Genomes: 𝑓 0.00055 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000047 ( 0 hom. )

Consequence

ABCC9
NM_020297.4 intron

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:3

Conservation

PhyloP100: 0.849

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:

ENSG00000257022 (HGNC:):

ENSG00000257022 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -7 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.23).

BP6

Variant 12-21864490-C-T is Benign according to our data. Variant chr12-21864490-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 228423.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Benign=2, Likely_benign=1}.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000552 (84/152178) while in subpopulation AFR AF= 0.00195 (81/41528). AF 95% confidence interval is 0.00161. There are 0 homozygotes in gnomad4. There are 42 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ABCC9	NM_020297.4 link	c.2199-13G>A		intron_variant	Intron 18 of 39	ENST00000261200.9	NP_064693.2	O60706-2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ABCC9	ENST00000261200.9 link	c.2199-13G>A		intron_variant	Intron 18 of 39	5	NM_020297.4	ENSP00000261200.4		O60706-2

Frequencies

GnomAD3 genomes

AF:

0.000552

AC:

AN:

152060

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00196

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000197

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000148

AC:

AN:

250480

Hom.:

AF XY:

0.000111

AC XY:

AN XY:

135454

show subpopulations

Gnomad AFR exome

AF:

0.00204

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000473

AC:

AN:

1415502

Hom.:

Cov.:

AF XY:

0.0000354

AC XY:

AN XY:

706882

show subpopulations

Gnomad4 AFR exome

AF:

0.00163

Gnomad4 AMR exome

AF:

0.000180

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.000102

GnomAD4 genome

AF:

0.000552

AC:

AN:

152178

Hom.:

Cov.:

AF XY:

0.000565

AC XY:

AN XY:

74398

show subpopulations

Gnomad4 AFR

AF:

0.00195

Gnomad4 AMR

AF:

0.000196

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000521

Hom.:

Bravo

AF:

0.000623

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:2Benign:3

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

not specified

Uncertain:1Benign:1

Aug 10, 2017

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Variant classified as Uncertain Significance - Favor Benign. The c.2199-13G>A va riant in ABCC9 has been identified in our laboratory in one individual with dila ted cardiomyopathy. It has also been identified in 0.2% (22/10238) of African ch romosomes by the Genome Aggregation Database (gnomAD, http://gnomad.broadinstitu te.org; dbSNP rs201226082). This variant has been reported in ClinVar (Variation ID: 228423). Computational tools do not suggest an impact on splicing, though t his information is not predictive enough to rule out pathogenicity. In summary, while the clinical significance of the c.2199-13G>A variant is uncertain, its fr equency suggests that it is more likely to be benign. -

Dec 06, 2024

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

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

not provided

Uncertain:1Benign:1

Sep 05, 2017

Stanford Center for Inherited Cardiovascular Disease, Stanford University

Significance: Uncertain significance

Review Status: no assertion criteria provided

Collection Method: provider interpretation

c.2199-13G>A in intron 16 of the ABCC9 gene (NM_005691.2; 12:22017424C>T) The Laboratory for Molecular Medicine classifies this variant as a variant of uncertain significance. However, they state it is more likely to be benign. Given the absence of case data and its high prevalence in the general population, we consider this variant a variant of uncertain significance, likely benign, and we do not feel it is suitable for assessing risk in healthy relatives ("predictive genetic testing"). The variant has been seen in at least 2 unrelated (unpublished) cases of dilated cardiomyopathy (including this patient's family). The ABCC9 gene is most commonly associated with familial atrial fibrillation, dilated cardiomyopathy and hypertrichotic osteochondrodysplasia (Cantu syndrome). There is no published case data. This variant is present in ClinVar: GeneDx classifies this variant as likely benign. Per the test report, "computational tools do not suggest an impact on splicing, though this information is not predictive enough to rule out pathogenicity." The cytosine in the gDNA at position 2199 is moderately conserved across species. Neighboring nucleic acids are more strongly conserved. There are two other nearby intronic variants close to this one that are both classified as (likely) benign: c.2199-6T>C and c.2199-11T>C. The variant was reported online in 53 of 138,163 individuals in the Genome Aggregation Consortium Dataset (gnomAD; http://gnomad.broadinstitute.org/), which currently includes variant calls on >140,000 unrelated individuals of African, Asian, European, Ashkenazi, Latino descent. Specifically, the variant was observed in 49 of 11,984 individuals of African descent (MAF=0.2%) and 4 of 17,148 individuals of Latino descent. The phenotype of those individuals is not publicly available. The dataset is comprised of multiple cohorts, some of which were recruited from the general population, others were enriched for common cardiovascular disease. -

Oct 05, 2020

GeneDx

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Dilated cardiomyopathy 1O

Benign:1

Jan 17, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.23

CADD

Benign

DANN

Benign

0.72

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

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