chr6-131821523-C-T

Variant names:

• chr6-131821523-C-T
• rs7756163
• NM_006208.3:c.240+13248C>T

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BA1

The NM_006208.3(ENPP1):​c.240+13248C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.654 in 152,026 control chromosomes in the GnomAD database, including 33,078 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.65 (33078 hom., cov: 32)
• Consequence: ENPP1 NM_006208.3 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: -0.877
• Publications: 7 publications found

Genes affected

ENPP1 (HGNC:3356): (ectonucleotide pyrophosphatase/phosphodiesterase 1) This gene is a member of the ecto-nucleotide pyrophosphatase/phosphodiesterase (ENPP) family. The encoded protein is a type II transmembrane glycoprotein comprising two identical disulfide-bonded subunits. This protein has broad specificity and cleaves a variety of substrates, including phosphodiester bonds of nucleotides and nucleotide sugars and pyrophosphate bonds of nucleotides and nucleotide sugars. This protein may function to hydrolyze nucleoside 5' triphosphates to their corresponding monophosphates and may also hydrolyze diadenosine polyphosphates. Mutations in this gene have been associated with 'idiopathic' infantile arterial calcification, ossification of the posterior longitudinal ligament of the spine (OPLL), and insulin resistance. [provided by RefSeq, Jul 2008]

ENPP1 Gene-Disease associations (from GenCC):

• arterial calcification, generalized, of infancy, 1

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), G2P
• hypopigmentation-punctate palmoplantar keratoderma syndrome

  Inheritance: AD Classification: STRONG, SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, Genomics England PanelApp, Orphanet, G2P, Labcorp Genetics (formerly Invitae)
• hypophosphatemic rickets, autosomal recessive, 2

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• arterial calcification of infancy

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• autosomal recessive hypophosphatemic rickets

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• autosomal recessive inherited pseudoxanthoma elasticum

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.92).
• BA1: GnomAd4 highest subpopulation (EAS) allele frequency at 95% confidence interval = 0.8 is higher than 0.05.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
ENPP1	NM_006208.3	c.240+13248C>T		intron_variant	Intron 1 of 24	ENST00000647893.1	NP_006199.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
ENPP1	ENST00000647893.1	c.240+13248C>T		intron_variant	Intron 1 of 24		NM_006208.3	ENSP00000498074.1
ENPP1	ENST00000486853.1	n.260+13248C>T		intron_variant	Intron 1 of 3	2
ENPP1	ENST00000513998.5	n.240+13248C>T		intron_variant	Intron 1 of 24	5		ENSP00000422424.1
ENPP1	ENST00000650507.1	n.154-4499C>T		intron_variant	Intron 1 of 3			ENSP00000497375.1

Frequencies

GnomAD3 genomes AF: 0.654 AC: 99330 AN: 151908 Hom.: 33058 Cov.: 32

Gnomad AFR AF: 0.748

Gnomad AMI AF: 0.410

Gnomad AMR AF: 0.595

Gnomad ASJ AF: 0.683

Gnomad EAS AF: 0.820

Gnomad SAS AF: 0.681

Gnomad FIN AF: 0.578

Gnomad MID AF: 0.718

Gnomad NFE AF: 0.608

Gnomad OTH AF: 0.673

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.654 AC: 99397 AN: 152026 Hom.: 33078 Cov.: 32 AF XY: 0.653 AC XY: 48494 AN XY: 74296

African (AFR) AF: 0.748 AC: 31030 AN: 41478

American (AMR) AF: 0.596 AC: 9102 AN: 15282

Ashkenazi Jewish (ASJ) AF: 0.683 AC: 2366 AN: 3462

East Asian (EAS) AF: 0.820 AC: 4240 AN: 5170

South Asian (SAS) AF: 0.680 AC: 3271 AN: 4812

European-Finnish (FIN) AF: 0.578 AC: 6107 AN: 10566

Middle Eastern (MID) AF: 0.718 AC: 211 AN: 294

European-Non Finnish (NFE) AF: 0.608 AC: 41275 AN: 67940

Other (OTH) AF: 0.673 AC: 1421 AN: 2110

Alfa AF: 0.603 Hom.: 14506

Bravo AF: 0.655

Asia WGS AF: 0.750 AC: 2606 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.92
CADD	Benign	0.083
DANN	Benign	0.31
PhyloP100		-0.88
Mutation Taster		=100/0	polymorphism (auto)

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: rs7756163; hg19: chr6-132142663;