Variant 6-122805021-A-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_006714.5(SMPDL3A):c.851A>T(p.Asp284Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000248 in 1,613,298 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000021 ( 0 hom. )

Consequence

SMPDL3A
NM_006714.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.221

Variant links:

Genes affected

SMPDL3A (HGNC:17389): (sphingomyelin phosphodiesterase acid like 3A) Enables phosphoric diester hydrolase activity and zinc ion binding activity. Involved in nucleoside triphosphate catabolic process. Located in extracellular space. [provided by Alliance of Genome Resources, Apr 2022]

SMPDL3A links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SMPDL3A	NM_006714.5 linkuse as main transcript	c.851A>T	p.Asp284Val	missense_variant	6/8	ENST00000368440.5
SMPDL3A	NM_001286138.2 linkuse as main transcript	c.458A>T	p.Asp153Val	missense_variant	5/7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SMPDL3A	ENST00000368440.5 linkuse as main transcript	c.851A>T	p.Asp284Val	missense_variant	6/8	1	NM_006714.5	P1	Q92484-1
SMPDL3A	ENST00000539041.5 linkuse as main transcript	c.458A>T	p.Asp153Val	missense_variant	5/7	2			Q92484-2

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152214

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000478

GnomAD3 exomes

AF:

0.0000160

AC:

AN:

250642

Hom.:

AF XY:

0.0000148

AC XY:

AN XY:

135478

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000109

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000881

Gnomad OTH exome

AF:

0.000164

GnomAD4 exome

AF:

0.00000205

AC:

AN:

1461084

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

726744

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152214

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74378

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000478

Bravo

AF:

0.00000756

ExAC

AF:

0.0000247

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Dec 19, 2023

The c.851A>T (p.D284V) alteration is located in exon 6 (coding exon 6) of the SMPDL3A gene. This alteration results from a A to T substitution at nucleotide position 851, causing the aspartic acid (D) at amino acid position 284 to be replaced by a valine (V). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.14

BayesDel_addAF

Uncertain

0.017

BayesDel_noAF

Uncertain

0.010

Cadd

Benign

Dann

Benign

0.88

Eigen

Benign

-0.48

Eigen_PC

Benign

-0.63

FATHMM_MKL

Benign

0.14

LIST_S2

Uncertain

0.91

D;D

M_CAP

Uncertain

0.14

MetaRNN

Uncertain

0.68

D;D

MetaSVM

Uncertain

0.18

MutationTaster

Benign

1.0

N;N

PrimateAI

Benign

0.21

PROVEAN

Uncertain

-3.6

D;D

REVEL

Uncertain

0.55

Sift

Benign

0.14

T;T

Sift4G

Benign

0.21

T;D

Polyphen

0.38

.;B

Vest4

0.58

MutPred

0.67

.;Gain of sheet (P = 0.0344);

MVP

0.84

MPC

0.25

ClinPred

0.22

GERP RS

1.8

Varity_R

0.46

gMVP

0.75

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over