16-16178916-G-T

Variant names:

• chr16-16178916-G-T
• rs72653789
• NM_001171.6:c.2297C>A

Variant summary

Our verdict is Likely pathogenic. The variant received 9 ACMG points: 9P and 0B. PM1 PM2 PP3_Strong PP5

The NM_001171.6(ABCC6):​c.2297C>A​(p.Ala766Asp) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A766V) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: ABCC6 NM_001171.6 missense
• Clinical Significance: Pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 9.87
• Publications: 5 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: Likely_pathogenic. The variant received 9 ACMG points.

• PM1: In a hotspot region, there are 8 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 1 benign, 6 uncertain in NM_001171.6
• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.991
• PP5: Variant 16-16178916-G-T is Pathogenic according to our data. Variant chr16-16178916-G-T is described in ClinVar as Pathogenic. ClinVar VariationId is 433269.Status of the report is no_assertion_criteria_provided, 0 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001171.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ABCC6	NM_001171.6	MANE Select	c.2297C>A	p.Ala766Asp	missense	Exon 18 of 31	NP_001162.5
	ABCC6	NM_001440309.1		c.2297C>A	p.Ala766Asp	missense	Exon 18 of 31	NP_001427238.1
	ABCC6	NM_001351800.1		c.1955C>A	p.Ala652Asp	missense	Exon 18 of 31	NP_001338729.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ABCC6	ENST00000205557.12	TSL:1 MANE Select	c.2297C>A	p.Ala766Asp	missense	Exon 18 of 31	ENSP00000205557.7
	ABCC6	ENST00000456970.6	TSL:2	n.2297C>A		non_coding_transcript_exon	Exon 18 of 29	ENSP00000405002.2
	ABCC6	ENST00000622290.5	TSL:5	n.2297C>A		non_coding_transcript_exon	Exon 18 of 32	ENSP00000483331.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 36

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Autosomal recessive inherited pseudoxanthoma elasticum Pathogenic:1

Mar 01, 2021

PXE International

Significance: Pathogenic

Review Status: no assertion criteria provided

Collection Method: research

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.94
BayesDel_addAF	Pathogenic	0.52	D
BayesDel_noAF	Pathogenic	0.51
CADD	Pathogenic	32
DANN	Uncertain	1.0
DEOGEN2	Pathogenic	0.94	D
Eigen	Pathogenic	0.96
Eigen_PC	Pathogenic	0.85
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Pathogenic	0.99	D
M_CAP	Uncertain	0.21	D
MetaRNN	Pathogenic	0.99	D
MetaSVM	Pathogenic	1.1	D
MutationAssessor	Pathogenic	5.0	H
PhyloP100		9.9
PrimateAI	Uncertain	0.67	T
PROVEAN	Pathogenic	-5.4	D
REVEL	Pathogenic	0.98
Sift	Pathogenic	0.0	D
Sift4G	Pathogenic	0.0010	D
Polyphen		1.0	D
Vest4		0.99
MutPred		0.97		Loss of MoRF binding (P = 0.0576)
MVP		0.97
MPC		0.49
ClinPred		1.0	D
GERP RS		5.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.99
gMVP		0.93
Mutation Taster		=13/87	disease causing (ClinVar)

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		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: rs72653789; hg19: chr16-16272773;