NM_153343.4:c.809G>T

Variant names:

• chr4-184116902-C-A
• rs201276870
• NM_153343.4:c.809G>T

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2 BP4

The NM_153343.4(ENPP6):​c.809G>T​(p.Arg270Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,838 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R270H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: ENPP6 NM_153343.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 3.42
• Publications: 0 publications found

Genes affected

ENPP6 (HGNC:23409): (ectonucleotide pyrophosphatase/phosphodiesterase 6) Enables glycerophosphocholine cholinephosphodiesterase activity. Involved in choline metabolic process and lipid metabolic process. Located in extracellular region and plasma membrane. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.3525859).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_153343.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ENPP6	NM_153343.4	MANE Select	c.809G>T	p.Arg270Leu	missense	Exon 5 of 8	NP_699174.1	Q6UWR7

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	ENPP6	ENST00000296741.7	TSL:1 MANE Select	c.809G>T	p.Arg270Leu	missense	Exon 5 of 8	ENSP00000296741.2	Q6UWR7
	ENPP6	ENST00000952351.1		c.629G>T	p.Arg210Leu	missense	Exon 4 of 7	ENSP00000622410.1
	ENPP6	ENST00000512353.1	TSL:3	c.545G>T	p.Arg182Leu	missense	Exon 6 of 6	ENSP00000423497.1	D6R9P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461838 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727218

African (AFR) AF: 0.00 AC: 0 AN: 33480

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.0000252 AC: 1 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86256

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5720

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1112006

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 33

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.52
BayesDel_addAF	Benign	0.010	T
BayesDel_noAF	Benign	-0.22
CADD	Benign	22
DANN	Uncertain	1.0
DEOGEN2	Benign	0.18	T
Eigen	Benign	-0.38
Eigen_PC	Benign	-0.39
FATHMM_MKL	Uncertain	0.95	D
LIST_S2	Uncertain	0.91	D
M_CAP	Benign	0.060	D
MetaRNN	Benign	0.35	T
MetaSVM	Benign	-0.80	T
MutationAssessor	Benign	1.5	L
PhyloP100		3.4
PrimateAI	Uncertain	0.57	T
PROVEAN	Uncertain	-3.3	D
REVEL	Uncertain	0.43
Sift	Benign	0.61	T
Sift4G	Uncertain	0.042	D
Polyphen		0.90	P
Vest4		0.80
MutPred		0.60		Loss of sheet (P = 0.0025)
MVP		0.81
MPC		0.48
ClinPred		0.99	D
GERP RS		1.4
Varity_R		0.14
gMVP		0.83
Mutation Taster		=72/28	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs201276870; hg19: chr4-185038055;