12-21848190-A-G

Variant names:

• chr12-21848190-A-G
• rs141025897
• NM_020297.4:c.2826T>C

Variant summary

Our verdict is Benign. The variant received -10 ACMG points: 0P and 10B. BP4_Strong BP6 BP7 BS1

The NM_020297.4(ABCC9):​c.2826T>C​(p.Tyr942Tyr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000144 in 1,613,698 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 0.00079 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000077 (0 hom.)
• Consequence: ABCC9 NM_020297.4 synonymous
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:5
• Conservation: PhyloP100: 0.633
• Publications: 1 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: Ambry Genetics, G2P, Orphanet, Labcorp Genetics (formerly Invitae), ClinGen
• dilated cardiomyopathy 1O

  Inheritance: AD Classification: STRONG, MODERATE, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), Illumina, Ambry Genetics
• 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, NO_KNOWN Submitted by: ClinGen, 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 -10 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.5).
• BP6: Variant 12-21848190-A-G is Benign according to our data. Variant chr12-21848190-A-G is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 201611.
• BP7: Synonymous conserved (PhyloP=0.633 with no splicing effect.
• BS1: Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000794 (121/152332) while in subpopulation AFR AF = 0.00267 (111/41576). AF 95% confidence interval is 0.00227. There are 0 homozygotes in GnomAd4. There are 53 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_020297.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ABCC9	NM_020297.4	MANE Select	c.2826T>C	p.Tyr942Tyr	synonymous	Exon 25 of 40	NP_064693.2	O60706-2
	ABCC9	NM_001377273.1		c.2826T>C	p.Tyr942Tyr	synonymous	Exon 26 of 41	NP_001364202.1	O60706-2
	ABCC9	NM_005691.4		c.2826T>C	p.Tyr942Tyr	synonymous	Exon 25 of 41	NP_005682.2	O60706-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ABCC9	ENST00000261200.9	TSL:5 MANE Select	c.2826T>C	p.Tyr942Tyr	synonymous	Exon 25 of 40	ENSP00000261200.4	O60706-2
	ABCC9	ENST00000261201.10	TSL:5	c.2826T>C	p.Tyr942Tyr	synonymous	Exon 25 of 41	ENSP00000261201.4	O60706-1
	ABCC9	ENST00000879186.1		c.2826T>C	p.Tyr942Tyr	synonymous	Exon 24 of 39	ENSP00000549245.1

Frequencies

GnomAD3 genomes AF: 0.000795 AC: 121 AN: 152214 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00268

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.000524

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: 0.0000147

Gnomad OTH AF: 0.000478

GnomAD2 exomes AF: 0.000183 AC: 46 AN: 251386 AF XY: 0.000155

Gnomad AFR exome AF: 0.00240

Gnomad AMR exome AF: 0.000116

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000879

Gnomad OTH exome AF: 0.000163

GnomAD4 exome AF: 0.0000766 AC: 112 AN: 1461366 Hom.: 0 Cov.: 31 AF XY: 0.0000702 AC XY: 51 AN XY: 726988

African (AFR) AF: 0.00287 AC: 96 AN: 33448

American (AMR) AF: 0.000134 AC: 6 AN: 44706

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26104

East Asian (EAS) AF: 0.00 AC: 0 AN: 39684

South Asian (SAS) AF: 0.0000116 AC: 1 AN: 86254

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53410

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5762

European-Non Finnish (NFE) AF: 9.00e-7 AC: 1 AN: 1111628

Other (OTH) AF: 0.000133 AC: 8 AN: 60370

GnomAD4 genome AF: 0.000794 AC: 121 AN: 152332 Hom.: 0 Cov.: 32 AF XY: 0.000711 AC XY: 53 AN XY: 74496

African (AFR) AF: 0.00267 AC: 111 AN: 41576

American (AMR) AF: 0.000523 AC: 8 AN: 15290

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5192

South Asian (SAS) AF: 0.00 AC: 0 AN: 4830

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10626

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.0000147 AC: 1 AN: 68030

Other (OTH) AF: 0.000473 AC: 1 AN: 2114

Alfa AF: 0.000306 Hom.: 0

Bravo AF: 0.000858

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

Pathogenic	VUS	Benign	Condition
-	1	1	Dilated cardiomyopathy 1O (2)
-	-	2	not specified (2)
-	-	1	Cardiomyopathy (1)
-	-	1	Cardiovascular phenotype (1)
-	1	-	Hypertrichotic osteochondrodysplasia Cantu type (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.50
CADD	Benign	2.9
DANN	Benign	0.77
PhyloP100		0.63

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: rs141025897; hg19: chr12-22001124;