chr16-16162987-TCCTA-T

Position:

• chr16-16162987-TCCTA-T

Variant summary

Our verdict is Pathogenic. Variant got 17 ACMG points: 17P and 0B. PVS1 PP3 PP5_Very_Strong

The NM_001171.6(ABCC6):​c.3506+2_3506+5delTAGG variant causes a splice donor, splice region, intron change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000041 in 1,461,760 control chromosomes in the GnomAD database, with no homozygous occurrence. 1/1 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Pathogenic (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: ABCC6 NM_001171.6 splice_donor, splice_region, intron
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 8.87

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 (HGNC:):

ACMG classification

Verdict is Pathogenic. Variant got 17 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, LoF is a know mechanism of disease, Cryptic splice site detected, with MaxEntScore 6.6, offset of 49, new splice context is: aggGTgaga. Cryptic site results in frameshift change. If cryptic site found is not functional and variant results in exon loss, it results in frameshift change.
• PP3: Multiple lines of computational evidence support a deleterious effect 2: max_spliceai, phyloP100way_vertebrate [when was below the threshold]
• PP5: Variant 16-16162987-TCCTA-T is Pathogenic according to our data. Variant chr16-16162987-TCCTA-T is described in ClinVar as [Pathogenic]. Clinvar id is 433390.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-16162987-TCCTA-T is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
ABCC6	NM_001171.6	c.3506+2_3506+5delTAGG		splice_donor_variant, splice_region_variant, intron_variant		ENST00000205557.12	NP_001162.5
ABCC6	NM_001351800.1	c.3164+2_3164+5delTAGG		splice_donor_variant, splice_region_variant, intron_variant			NP_001338729.1
ABCC6	NR_147784.1	n.3169-1427_3169-1424delTAGG		intron_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
ABCC6	ENST00000205557.12	c.3506+2_3506+5delTAGG		splice_donor_variant, splice_region_variant, intron_variant		1	NM_001171.6	ENSP00000205557.7
ABCC6	ENST00000456970.6	n.*516-1427_*516-1424delTAGG		intron_variant		2		ENSP00000405002.2
ABCC6	ENST00000622290.5	n.3506+2_3506+5delTAGG		splice_donor_variant, splice_region_variant, intron_variant		5		ENSP00000483331.2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000410 AC: 6 AN: 1461760 Hom.: 0 AF XY: 0.00000413 AC XY: 3 AN XY: 727172

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000540

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

Alfa AF: 0.0000508 Hom.: 0

Bravo AF: 0.00000756

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:2

Pathogenic, criteria provided, single submitter	clinical testing	Revvity Omics, Revvity	Sep 09, 2022	- -
Pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Apr 05, 2019	Canonical splice site variant in a gene for which loss-of-function is a known mechanism of disease; Not observed in large population cohorts (Lek et al., 2016); This variant is associated with the following publications: (PMID: 32664777, 16835894) -

Autosomal recessive inherited pseudoxanthoma elasticum Pathogenic:1

Likely pathogenic, no assertion criteria provided

research

PXE International

Mar 02, 2021

- -

Computational scores

Source: dbNSFP v4.3

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.74		Details are displayed if max score is > 0.2
DS_DG_spliceai		0.22		Position offset: -47
DS_DL_spliceai		0.74		Position offset: 6

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

Publications

LitVar

Other links and lift over

dbSNP: rs72664211; hg19: chr16-16256844;