Variant 1-27949120-A-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_014474.4(SMPDL3B):c.331A>T(p.Ile111Phe) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000155 in 1,614,094 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

SMPDL3B
NM_014474.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.94

Variant links:

Genes affected

SMPDL3B (HGNC:21416): (sphingomyelin phosphodiesterase acid like 3B) Enables phosphoric diester hydrolase activity. Predicted to be involved in membrane lipid catabolic process; negative regulation of inflammatory response; and negative regulation of toll-like receptor signaling pathway. Located in extracellular exosome. [provided by Alliance of Genome Resources, Apr 2022]

SMPDL3B links:

(HGNC:):

links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.856

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
SMPDL3B	NM_014474.4 linkuse as main transcript	c.331A>T	p.Ile111Phe	missense_variant	3/8	ENST00000373894.8
SMPDL3B	NM_001009568.3 linkuse as main transcript	c.331A>T	p.Ile111Phe	missense_variant	3/7
SMPDL3B	XM_011541259.3 linkuse as main transcript	c.421A>T	p.Ile141Phe	missense_variant	4/9
SMPDL3B	NM_001304579.2 linkuse as main transcript	c.-288A>T		5_prime_UTR_variant	3/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SMPDL3B	ENST00000373894.8 linkuse as main transcript	c.331A>T	p.Ile111Phe	missense_variant	3/8	1	NM_014474.4	P1	Q92485-1
	ENST00000448015.1 linkuse as main transcript	n.286+6651T>A		intron_variant, non_coding_transcript_variant		5

Frequencies

GnomAD3 genomes

AF:

0.0000131

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000795

AC:

AN:

251448

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135886

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000157

AC:

AN:

1461880

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000198

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152214

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74370

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:

0.0000294

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000151

ExAC

AF:

0.00000824

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

May 15, 2024

The c.331A>T (p.I111F) alteration is located in exon 3 (coding exon 3) of the SMPDL3B gene. This alteration results from a A to T substitution at nucleotide position 331, causing the isoleucine (I) at amino acid position 111 to be replaced by a phenylalanine (F). 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

Uncertain

0.45

BayesDel_addAF

Pathogenic

0.27

BayesDel_noAF

Pathogenic

0.33

CADD

Uncertain

DANN

Benign

0.97

DEOGEN2

Uncertain

0.54

D;D;.;T

Eigen

Uncertain

0.34

Eigen_PC

Benign

0.22

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Benign

0.84

T;T;T;T

M_CAP

Uncertain

0.17

MetaRNN

Pathogenic

0.86

D;D;D;D

MetaSVM

Uncertain

0.72

MutationAssessor

Uncertain

2.7

M;.;M;.

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Uncertain

0.59

PROVEAN

Uncertain

-3.6

D;D;D;D

REVEL

Pathogenic

0.75

Sift

Uncertain

0.0030

D;D;D;D

Sift4G

Uncertain

0.0080

D;D;D;D

Polyphen

1.0

D;.;D;D

Vest4

0.91

MutPred

0.64

Loss of catalytic residue at T116 (P = 0.2718);.;Loss of catalytic residue at T116 (P = 0.2718);Loss of catalytic residue at T116 (P = 0.2718);

MVP

0.97

MPC

1.1

ClinPred

0.88

GERP RS

4.7

Varity_R

0.82

gMVP

0.94

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

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