Genetic Variant ABCC6:p.Ala950Pro (chr16-16169793-C-G) – ACMG Classification: Likely_pathogenic (6 pts)

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM2PM5

The NM_001171.6(ABCC6):c.2848G>C(p.Ala950Pro) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000701 in 1,427,326 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. A950T) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 7.0e-7 ( 0 hom. )

Consequence

ABCC6
NM_001171.6 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.456

Variant links:

Genes affected

ABCC6 (HGNC:57): (ATP binding cassette subfamily C member 6) 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). The encoded protein, a member of the MRP subfamily, is involved in multi-drug resistance. Mutations in this gene cause pseudoxanthoma elasticum. Alternatively spliced transcript variants that encode different proteins have been described for this gene. [provided by RefSeq, Jul 2008]

ABCC6 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

PM1

In a domain ABC transmembrane type-1 2 (size 281) in uniprot entity MRP6_HUMAN there are 30 pathogenic changes around while only 5 benign (86%) in NM_001171.6

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr16-16169793-C-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein
ABCC6	NM_001171.6 link	c.2848G>C	p.Ala950Pro	missense_variant	Exon 22 of 31	ENST00000205557.12	NP_001162.5
ABCC6	NM_001351800.1 link	c.2506G>C	p.Ala836Pro	missense_variant	Exon 22 of 31		NP_001338729.1
ABCC6	NR_147784.1 link	n.2710G>C		non_coding_transcript_exon_variant	Exon 21 of 29

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
ABCC6	ENST00000205557.12 link	c.2848G>C	p.Ala950Pro	missense_variant	Exon 22 of 31	1	NM_001171.6	ENSP00000205557.7	O95255-1
ABCC6	ENST00000456970.6 link	n.*57G>C		non_coding_transcript_exon_variant	Exon 21 of 29	2		ENSP00000405002.2	O95255-3
ABCC6	ENST00000622290.5 link	n.2848G>C		non_coding_transcript_exon_variant	Exon 22 of 32	5		ENSP00000483331.2	A0A8C8Q0G8
ABCC6	ENST00000456970.6 link	n.*57G>C		3_prime_UTR_variant	Exon 21 of 29	2		ENSP00000405002.2	O95255-3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

7.01e-7

AC:

AN:

1427326

Hom.:

Cov.:

AF XY:

0.00000141

AC XY:

AN XY:

706934

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000122

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.21

BayesDel_addAF

Uncertain

0.15

BayesDel_noAF

Uncertain

-0.030

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.30

Eigen

Benign

-0.67

Eigen_PC

Benign

-0.88

FATHMM_MKL

Benign

0.26

LIST_S2

Benign

0.75

M_CAP

Pathogenic

0.37

MetaRNN

Uncertain

0.65

MetaSVM

Uncertain

0.20

MutationAssessor

Benign

1.6

PrimateAI

Benign

0.30

PROVEAN

Benign

-1.8

REVEL

Uncertain

0.51

Sift

Benign

0.075

Sift4G

Uncertain

0.027

Polyphen

0.93

Vest4

0.49

MutPred

0.62

Loss of helix (P = 0.0626);

MVP

0.78

MPC

0.34

ClinPred

0.77

GERP RS

-2.3

Varity_R

0.62

gMVP

0.67

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.29

Details are displayed if max score is > 0.2

DS_AG_spliceai

0.29

Position offset: -24

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

Publications

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over