rs76458291

chr12-21894157-C-T

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_Strong BP6_Very_Strong BP7 BS1 BS2

The NM_020297.4(ABCC9):c.1677G>A(p.Ala559=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00132 in 1,613,974 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.0018 (1 hom., cov: 32)
  • Exomes 𝑓: 0.0013 (2 hom.)
• Consequence: ABCC9 NM_020297.4 synonymous
• Clinical Significance: Benign/Likely benign criteria provided, multiple submitters, no conflicts B:14
• Conservation: PhyloP100: -5.54

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]

ACMG classification

Verdict is Benign. Variant got -21 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.78).
• BP6: Variant 12-21894157-C-T is Benign according to our data. Variant chr12-21894157-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 45390.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr12-21894157-C-T is described in Lovd as [Benign]. Variant chr12-21894157-C-T is described in Lovd as [Likely_benign].
• BP7: Synonymous conserved (PhyloP=-5.54 with no splicing effect.
• BS1: Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.0018 (274/152224) while in subpopulation NFE AF= 0.00121 (82/68018). AF 95% confidence interval is 0.000995. There are 1 homozygotes in gnomad4. There are 182 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High Homozygotes in GnomAdExome at 3 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ABCC9	NM_020297.4	c.1677G>A	p.Ala559=	synonymous_variant	14/40	ENST00000261200.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ABCC9	ENST00000261200.9	c.1677G>A	p.Ala559=	synonymous_variant	14/40	5	NM_020297.4	P4

Frequencies

GnomAD3 genomes AF: 0.00181 AC: 275 AN: 152106 Hom.: 1 Cov.: 32

Gnomad AFR AF: 0.000410

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000131

Gnomad ASJ AF: 0.00317

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.0153

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00121

Gnomad OTH AF: 0.000478

GnomAD3 exomes AF: 0.00228 AC: 572 AN: 251212 Hom.: 3 AF XY: 0.00224 AC XY: 304 AN XY: 135750

Gnomad AFR exome AF: 0.000554

Gnomad AMR exome AF: 0.000116

Gnomad ASJ exome AF: 0.00288

Gnomad EAS exome AF: 0.000163

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.0131

Gnomad NFE exome AF: 0.00195

Gnomad OTH exome AF: 0.00359

GnomAD4 exome AF: 0.00127 AC: 1856 AN: 1461750 Hom.: 2 Cov.: 31 AF XY: 0.00121 AC XY: 881 AN XY: 727174

Gnomad4 AFR exome AF: 0.000896

Gnomad4 AMR exome AF: 0.000112

Gnomad4 ASJ exome AF: 0.00226

Gnomad4 EAS exome AF: 0.0000756

Gnomad4 SAS exome AF: 0.0000232

Gnomad4 FIN exome AF: 0.0137

Gnomad4 NFE exome AF: 0.000825

Gnomad4 OTH exome AF: 0.00169

GnomAD4 genome AF: 0.00180 AC: 274 AN: 152224 Hom.: 1 Cov.: 32 AF XY: 0.00245 AC XY: 182 AN XY: 74412

Gnomad4 AFR AF: 0.000385

Gnomad4 AMR AF: 0.000131

Gnomad4 ASJ AF: 0.00317

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.0153

Gnomad4 NFE AF: 0.00121

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.00144 Hom.: 0

Bravo AF: 0.000695

Asia WGS AF: 0.000289 AC: 1 AN: 3478

EpiCase AF: 0.00120

EpiControl AF: 0.000771

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:14

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:4

Benign, criteria provided, single submitter	clinical testing	GeneDx	Mar 18, 2014	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Jan 07, 2016	p.Ala559Ala in exon 12 of ABCC9: This variant is not expected to have clinical s ignificance because it does not alter an amino acid residue and is not located w ithin the splice consensus sequence. It has been identified in 1.4% (91/6612) of Finnish chromosomes by the Exome Aggregation Consortium (ExAC, http://exac.bro adinstitute.org/; dbSNP rs76458291). -
Benign, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -
Benign, criteria provided, single submitter	clinical testing	Women's Health and Genetics/Laboratory Corporation of America, LabCorp	Sep 24, 2022	- -

not provided Benign:4

Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Feb 03, 2020	- -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Feb 01, 2023	ABCC9: BP4, BP7 -
Likely benign, no assertion criteria provided	clinical testing	Diagnostic Laboratory, Department of Genetics, University Medical Center Groningen	-	- -

Dilated cardiomyopathy 1O Benign:2

Benign, criteria provided, single submitter	clinical testing	Invitae	Jan 31, 2024	- -
Benign, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Apr 27, 2017	This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). Publications were found based on this search. The evidence from the literature, in combination with allele frequency data from public databases where available, was sufficient to rule this variant out of causing disease. Therefore, this variant is classified as benign. -

Hypertrichotic osteochondrodysplasia Cantu type Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Apr 27, 2017

This variant was observed as part of a predisposition screen in an ostensibly healthy population. A literature search was performed for the gene, cDNA change, and amino acid change (where applicable). No publications were found based on this search. Allele frequency data from public databases was too high to be consistent with this variant causing disease. Therefore, this variant is classified as benign. -

Cardiomyopathy Benign:1

Benign, criteria provided, single submitter

clinical testing

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

Jan 11, 2016

- -

ABCC9-related disorder Benign:1

Benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Oct 09, 2019

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

Cardiovascular phenotype Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 22, 2017

This alteration is classified as 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
BayesDel_noAF	Benign	-0.78
Cadd	Benign	0.12
Dann	Benign	0.32

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

Other links and lift over

dbSNP: rs76458291; hg19: chr12-22047091;