rs72664219

Variant names:

• chr16-16169820-C-CG
• rs72664219
• NM_001171.6:c.2820_2821insC

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_001171.6(ABCC6):​c.2820_2821insC​(p.Ala941ArgfsTer97) variant causes a frameshift change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (★). Synonymous variant affecting the same amino acid position (i.e. R940R) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 33)
• Consequence: ABCC6 NM_001171.6 frameshift
• Clinical Significance: Likely pathogenic criteria provided, single submitter P:1
• Conservation: PhyloP100: -0.0930
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• arterial calcification, generalized, of infancy, 2

  Inheritance: AR Classification: DEFINITIVE Submitted by: G2P
• autosomal recessive inherited pseudoxanthoma elasticum

  Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Laboratory for Molecular Medicine, Orphanet, Labcorp Genetics (formerly Invitae), G2P
• arterial calcification of infancy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 16-16169820-C-CG is Pathogenic according to our data. Variant chr16-16169820-C-CG is described in ClinVar as [Likely_pathogenic]. Clinvar id is 433290.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ABCC6	NM_001171.6	c.2820_2821insC	p.Ala941ArgfsTer97	frameshift_variant	Exon 22 of 31	ENST00000205557.12	NP_001162.5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ABCC6	ENST00000205557.12	c.2820_2821insC	p.Ala941ArgfsTer97	frameshift_variant	Exon 22 of 31	1	NM_001171.6	ENSP00000205557.7
ABCC6	ENST00000456970.6	n.*29_*30insC		non_coding_transcript_exon_variant	Exon 21 of 29	2		ENSP00000405002.2
ABCC6	ENST00000622290.5	n.2820_2821insC		non_coding_transcript_exon_variant	Exon 22 of 32	5		ENSP00000483331.2
ABCC6	ENST00000456970.6	n.*29_*30insC		3_prime_UTR_variant	Exon 21 of 29	2		ENSP00000405002.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 33

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: criteria provided, single submitter

Submissions by phenotype

Autosomal recessive inherited pseudoxanthoma elasticum Pathogenic:1

Mar 02, 2021

PXE International

Significance: Likely pathogenic

Review Status: criteria provided, single submitter

Collection Method: research

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
PhyloP100		-0.093
Mutation Taster		=5/195	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs72664219; hg19: chr16-16263677;