12-21908099-G-A

Position:

• chr12-21908099-G-A

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM1 PM2 PP2 PP3 PP5

The NM_020297.4(ABCC9):​c.1433C>T​(p.Ala478Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars).

• Frequency: Genomes: not found (cov: 32)
• Consequence: ABCC9 NM_020297.4 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.69

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 Likely_pathogenic. Variant got 7 ACMG points.

• PM1: In a domain ABC transmembrane type-1 1 (size 300) in uniprot entity ABCC9_HUMAN there are 13 pathogenic changes around while only 3 benign (81%) 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, 0.827
• PP5: Variant 12-21908099-G-A is Pathogenic according to our data. Variant chr12-21908099-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 31949.Status of the report is no_assertion_criteria_provided, 0 stars. Variant chr12-21908099-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ABCC9	NM_020297.4	c.1433C>T	p.Ala478Val	missense_variant	11/40	ENST00000261200.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ABCC9	ENST00000261200.9	c.1433C>T	p.Ala478Val	missense_variant	11/40	5	NM_020297.4	P4

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Hypertrichotic osteochondrodysplasia Cantu type Pathogenic:1

Pathogenic, no assertion criteria provided

literature only

OMIM

Jun 08, 2012

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.70
BayesDel_addAF	Pathogenic	0.32	D
BayesDel_noAF	Pathogenic	0.22
CADD	Pathogenic	30
DANN	Pathogenic	1.0
DEOGEN2	Pathogenic	0.80	.;.;D
Eigen	Uncertain	0.52
Eigen_PC	Uncertain	0.62
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.99	D;D;D
M_CAP	Benign	0.082	D
MetaRNN	Pathogenic	0.83	D;D;D
MetaSVM	Uncertain	0.38	D
MutationAssessor	Benign	1.5	L;.;L
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.79	T
PROVEAN	Uncertain	-2.7	D;N;D
REVEL	Pathogenic	0.79
Sift	Uncertain	0.0050	D;D;D
Sift4G	Uncertain	0.0070	D;D;D
Polyphen		0.95	P;.;B
Vest4		0.49
MutPred		0.55		Loss of disorder (P = 0.0577);.;Loss of disorder (P = 0.0577);
MVP		0.91
MPC		1.4
ClinPred		0.99	D
GERP RS		5.3
Varity_R		0.65
gMVP		0.93

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: rs387907211; hg19: chr12-22061033; COSMIC: COSV99686442;