10-99818820-C-G

Position:

• chr10-99818820-C-G

Variant summary

Our verdict is Likely pathogenic. Variant got 8 ACMG points: 8P and 0B. PM2 PM5 PP3_Strong

The NM_000392.5(ABCC2):​c.2302C>G​(p.Arg768Gly) 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. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R768W) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 32)
• Consequence: ABCC2 NM_000392.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.67

Genes affected

ABCC2 (HGNC:53): (ATP binding cassette subfamily C member 2) 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 expressed in the canalicular (apical) part of the hepatocyte and functions in biliary transport. Substrates include anticancer drugs such as vinblastine; therefore, this protein appears to contribute to drug resistance in mammalian cells. Several different mutations in this gene have been observed in patients with Dubin-Johnson syndrome (DJS), an autosomal recessive disorder characterized by conjugated hyperbilirubinemia. [provided by RefSeq, Jul 2008]

ABCC2 (HGNC:):

ACMG classification

Verdict is Likely_pathogenic. Variant got 8 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr10-99818820-C-T is described in Lovd as [Pathogenic].
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.993

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ABCC2	NM_000392.5	c.2302C>G	p.Arg768Gly	missense_variant	18/32	ENST00000647814.1	NP_000383.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ABCC2	ENST00000647814.1	c.2302C>G	p.Arg768Gly	missense_variant	18/32		NM_000392.5	ENSP00000497274.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.48	D
BayesDel_noAF	Pathogenic	0.45
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Uncertain	0.73	D;D
Eigen	Pathogenic	0.78
Eigen_PC	Uncertain	0.64
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.93	.;D
M_CAP	Uncertain	0.17	D
MetaRNN	Pathogenic	0.99	D;D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	4.2	H;H
PrimateAI	Uncertain	0.62	T
PROVEAN	Pathogenic	-6.3	.;D
REVEL	Pathogenic	0.91
Sift	Uncertain	0.0010	.;D
Sift4G	Pathogenic	0.0	.;D
Polyphen		1.0	D;D
Vest4		0.97
MutPred		0.98		Gain of ubiquitination at K766 (P = 0.0329);Gain of ubiquitination at K766 (P = 0.0329);
MVP		0.98
MPC		0.30
ClinPred		1.0	D
GERP RS		4.2
Varity_R		0.94
gMVP		0.87

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.50		Details are displayed if max score is > 0.2
DS_AL_spliceai		0.50		Position offset: -30

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Other links and lift over

dbSNP: rs56199535; hg19: chr10-101578577;