12-21829038-G-T

Position:

• chr12-21829038-G-T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1 PM2 PP2 PP3

The NM_020297.4(ABCC9):​c.3589C>A​(p.Arg1197Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ABCC9 NM_020297.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.56

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]

LOC105369689 (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM1: In a topological_domain Extracellular (size 96) in uniprot entity ABCC9_HUMAN there are 6 pathogenic changes around while only 2 benign (75%) in NM_020297.4
• PM2: Very rare variant in population databases, with high coverage
• 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.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.774

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ABCC9	NM_020297.4	c.3589C>A	p.Arg1197Ser	missense_variant	31/40	ENST00000261200.9	NP_064693.2
LOC105369689	XR_007063241.1	n.978G>T		non_coding_transcript_exon_variant	4/5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ABCC9	ENST00000261200.9	c.3589C>A	p.Arg1197Ser	missense_variant	31/40	5	NM_020297.4	ENSP00000261200	P4
	ENST00000539874.1	n.215+1614G>T		intron_variant, non_coding_transcript_variant		3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.68
BayesDel_addAF	Pathogenic	0.18	D
BayesDel_noAF	Uncertain	0.010
CADD	Uncertain	25
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.61	.;.;D
Eigen	Benign	0.061
Eigen_PC	Benign	0.11
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.81	T;T;T
M_CAP	Uncertain	0.16	D
MetaRNN	Pathogenic	0.77	D;D;D
MetaSVM	Uncertain	0.071	D
MutationAssessor	Benign	1.5	L;.;L
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Uncertain	0.75	T
PROVEAN	Benign	-2.3	N;N;N
REVEL	Uncertain	0.61
Sift	Benign	0.22	T;T;T
Sift4G	Benign	0.30	T;T;T
Polyphen		0.51	P;.;P
Vest4		0.36
MutPred		0.63		Loss of MoRF binding (P = 0.0329);.;Loss of MoRF binding (P = 0.0329);
MVP		0.90
MPC		0.80
ClinPred		0.89	D
GERP RS		3.3
Varity_R		0.57
gMVP		0.95

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: rs778849288; hg19: chr12-21981972;