rs72653799

chr16-16177490-A-G

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1 PP3_Strong

The NM_001171.6(ABCC6):c.2552T>C(p.Leu851Pro) variant causes a missense change. The variant allele was found at a frequency of 0.00000547 in 1,461,856 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. L851L) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000055 (0 hom.)
• Consequence: ABCC6 NM_001171.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:2
• Conservation: PhyloP100: 6.96

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]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM1: In a domain ABC transporter 1 (size 224) in uniprot entity MRP6_HUMAN there are 58 pathogenic changes around while only 9 benign (87%) in NM_001171.6
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.976

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
ABCC6	NM_001171.6	c.2552T>C	p.Leu851Pro	missense_variant	19/31	ENST00000205557.12
ABCC6	NM_001351800.1	c.2210T>C	p.Leu737Pro	missense_variant	19/31
ABCC6	NR_147784.1	n.2452+1308T>C		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
ABCC6	ENST00000205557.12	c.2552T>C	p.Leu851Pro	missense_variant	19/31	1	NM_001171.6	P1
ABCC6	ENST00000576683.1	n.32T>C		non_coding_transcript_exon_variant	1/3	3
ABCC6	ENST00000622290.5	c.2552T>C	p.Leu851Pro	missense_variant, NMD_transcript_variant	19/32	5
ABCC6	ENST00000456970.6	c.2415+1308T>C		intron_variant, NMD_transcript_variant		2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000547 AC: 8 AN: 1461856 Hom.: 0 Cov.: 31 AF XY: 0.00000550 AC XY: 4 AN XY: 727222

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000504

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000540

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, single submitter

Submissions by phenotype

Autosomal recessive inherited pseudoxanthoma elasticum Uncertain:1

Uncertain significance, no assertion criteria provided

research

PXE International

Feb 02, 2021

- -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Apr 05, 2019

Not observed in large population cohorts (Lek et al., 2016); In silico analysis, which includes protein predictors and evolutionary conservation, supports a deleterious effect; Observed in unrelated patients with pseudoxanthoma elasticum with another ABCC6 variant or multiple ABCC6 variants in published literature and referred for genetic testing at GeneDx, but it is not known whether the variants occurred on the same (in cis) or on different (in trans) chromosomes (Hendig et al., 2005; Schulz et al., 2006); This variant is associated with the following publications: (PMID: 16835894, 15723264) -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.19
BayesDel_addAF	Pathogenic	0.41	D
BayesDel_noAF	Pathogenic	0.36
Cadd	Uncertain	25
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.52	D
Eigen	Uncertain	0.36
Eigen_PC	Uncertain	0.27
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Benign	0.65	T
M_CAP	Uncertain	0.26	D
MetaRNN	Pathogenic	0.98	D
MetaSVM	Pathogenic	0.81	D
MutationAssessor	Uncertain	2.5	M
MutationTaster	Benign	1.0	D
PrimateAI	Benign	0.45	T
PROVEAN	Uncertain	-3.5	D
REVEL	Pathogenic	0.81
Sift	Uncertain	0.0010	D
Sift4G	Uncertain	0.0060	D
Polyphen		1.0	D
Vest4		0.83
MutPred		0.75		Gain of disorder (P = 0.016);
MVP		0.95
MPC		0.46
ClinPred		0.99	D
GERP RS		5.3
Varity_R		0.84
gMVP		0.91

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs72653799; hg19: chr16-16271347;