Variant 20-13117633-T-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_018327.4(SPTLC3):c.1060T>C(p.Phe354Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000614 in 1,613,524 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000040 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000064 ( 0 hom. )

Consequence

SPTLC3
NM_018327.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.35

Variant links:

Genes affected

SPTLC3 (HGNC:16253): (serine palmitoyltransferase long chain base subunit 3) This gene encodes a subunit of the serine palmitoyltransferase complex which catalyzes the rate-limiting step in sphingolipid biosynthesis. This subunit metabolizes lauroyl- and myristoyl-CoA and generates C14 and C16-sphingoid bases. [provided by RefSeq, Mar 2017]

SPTLC3 links:

TASP1 (HGNC:):

TASP1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.28812066).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SPTLC3	NM_018327.4 linkuse as main transcript	c.1060T>C	p.Phe354Leu	missense_variant	8/12	ENST00000399002.7	NP_060797.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SPTLC3	ENST00000399002.7 linkuse as main transcript	c.1060T>C	p.Phe354Leu	missense_variant	8/12	1	NM_018327.4	ENSP00000381968	P1	Q9NUV7-1

Frequencies

GnomAD3 genomes

AF:

0.0000395

AC:

AN:

151774

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

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:

0.0000736

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000643

AC:

AN:

248854

Hom.:

AF XY:

0.0000519

AC XY:

AN XY:

134976

show subpopulations

Gnomad AFR exome

AF:

0.0000646

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:

0.000133

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000636

AC:

AN:

1461750

Hom.:

Cov.:

AF XY:

0.0000509

AC XY:

AN XY:

727174

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000773

Gnomad4 OTH exome

AF:

0.0000828

GnomAD4 genome

AF:

0.0000395

AC:

AN:

151774

Hom.:

Cov.:

AF XY:

0.0000270

AC XY:

AN XY:

74100

show subpopulations

Gnomad4 AFR

AF:

0.0000242

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:

0.0000736

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000197

Hom.:

Bravo

AF:

0.0000378

ExAC

AF:

0.0000579

AC:

EpiCase

AF:

0.000164

EpiControl

AF:

0.000119

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 26, 2024

The c.1060T>C (p.F354L) alteration is located in exon 8 (coding exon 8) of the SPTLC3 gene. This alteration results from a T to C substitution at nucleotide position 1060, causing the phenylalanine (F) at amino acid position 354 to be replaced by a leucine (L). 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

Pathogenic

0.65

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.41

CADD

Benign

DANN

Benign

0.96

DEOGEN2

Uncertain

0.56

Eigen

Benign

-0.55

Eigen_PC

Benign

-0.33

FATHMM_MKL

Uncertain

0.90

LIST_S2

Uncertain

0.87

M_CAP

Benign

0.044

MetaRNN

Benign

0.29

MetaSVM

Benign

-0.60

MutationAssessor

Benign

-0.91

MutationTaster

Benign

1.0

D;N

PrimateAI

Benign

0.42

PROVEAN

Uncertain

-2.8

REVEL

Uncertain

0.30

Sift

Benign

0.29

Sift4G

Benign

0.20

Polyphen

0.0

Vest4

0.32

MutPred

0.55

Loss of loop (P = 0.2237);

MVP

0.62

MPC

0.24

ClinPred

0.058

GERP RS

5.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.26

gMVP

0.65

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