12-21862180-A-G

Variant names:

• chr12-21862180-A-G
• rs704192
• NM_020297.4:c.2339+773T>C

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_020297.4(ABCC9):​c.2339+773T>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.611 in 151,732 control chromosomes in the GnomAD database, including 28,850 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.61 (28850 hom., cov: 29)
• Consequence: ABCC9 NM_020297.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.00400
• Publications: 8 publications found

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 Gene-Disease associations (from GenCC):

• hypertrichotic osteochondrodysplasia Cantu type

  Inheritance: AD Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
• dilated cardiomyopathy 1O

  Inheritance: AD Classification: STRONG, MODERATE, LIMITED Submitted by: Illumina, Ambry Genetics, Labcorp Genetics (formerly Invitae)
• intellectual disability and myopathy syndrome

  Inheritance: AR Classification: MODERATE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae)
• acromegaloid facial appearance syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• familial isolated dilated cardiomyopathy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• hypertrichosis-acromegaloid facial appearance syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• Brugada syndrome

  Inheritance: AD Classification: LIMITED Submitted by: Genomics England PanelApp
• dilated cardiomyopathy

  Inheritance: AD Classification: LIMITED Submitted by: ClinGen
• atrial fibrillation, familial, 12

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ENSG00000257022 (HGNC:):

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.92).
• BA1: GnomAd4 highest subpopulation (AFR) allele frequency at 95% confidence interval = 0.703 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ABCC9	NM_020297.4	c.2339+773T>C		intron_variant	Intron 20 of 39	ENST00000261200.9	NP_064693.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ABCC9	ENST00000261200.9	c.2339+773T>C		intron_variant	Intron 20 of 39	5	NM_020297.4	ENSP00000261200.4

Frequencies

GnomAD3 genomes AF: 0.611 AC: 92707 AN: 151614 Hom.: 28839 Cov.: 29

Gnomad AFR AF: 0.711

Gnomad AMI AF: 0.688

Gnomad AMR AF: 0.657

Gnomad ASJ AF: 0.536

Gnomad EAS AF: 0.700

Gnomad SAS AF: 0.514

Gnomad FIN AF: 0.578

Gnomad MID AF: 0.522

Gnomad NFE AF: 0.550

Gnomad OTH AF: 0.599

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.611 AC: 92763 AN: 151732 Hom.: 28850 Cov.: 29 AF XY: 0.612 AC XY: 45343 AN XY: 74128

African (AFR) AF: 0.710 AC: 29378 AN: 41376

American (AMR) AF: 0.658 AC: 10017 AN: 15228

Ashkenazi Jewish (ASJ) AF: 0.536 AC: 1858 AN: 3468

East Asian (EAS) AF: 0.700 AC: 3605 AN: 5150

South Asian (SAS) AF: 0.514 AC: 2466 AN: 4798

European-Finnish (FIN) AF: 0.578 AC: 6067 AN: 10504

Middle Eastern (MID) AF: 0.514 AC: 151 AN: 294

European-Non Finnish (NFE) AF: 0.550 AC: 37334 AN: 67900

Other (OTH) AF: 0.599 AC: 1261 AN: 2104

Alfa AF: 0.563 Hom.: 49339

Bravo AF: 0.625

Asia WGS AF: 0.606 AC: 2107 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	1.2
DANN	Benign	0.36
PhyloP100		0.0040
Mutation Taster		=100/0	polymorphism (auto)

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

Other links and lift over

dbSNP: rs704192; hg19: chr12-22015114;