chr14-77552172-C-T

Position:

chr14-77552172-C-T

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_004863.4(SPTLC2):c.1227G>A(p.Thr409=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00101 in 1,614,154 control chromosomes in the GnomAD database, including 14 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0051 ( 7 hom., cov: 32)

Exomes 𝑓: 0.00057 ( 7 hom. )

Consequence

SPTLC2
NM_004863.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: -0.602

Variant links:

Genes affected

SPTLC2 (HGNC:11278): (serine palmitoyltransferase long chain base subunit 2) This gene encodes a long chain base subunit of serine palmitoyltransferase. Serine palmitoyltransferase, which consists of two different subunits, is the key enzyme in sphingolipid biosynthesis. It catalyzes the pyridoxal-5-prime-phosphate-dependent condensation of L-serine and palmitoyl-CoA to 3-oxosphinganine. Mutations in this gene were identified in patients with hereditary sensory neuropathy type I. [provided by RefSeq, Mar 2011]

SPTLC2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.49).

BP6

Variant 14-77552172-C-T is Benign according to our data. Variant chr14-77552172-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 380694.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr14-77552172-C-T is described in Lovd as [Likely_benign].

BP7

Synonymous conserved (PhyloP=-0.602 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00515 (784/152312) while in subpopulation AFR AF= 0.0177 (737/41572). AF 95% confidence interval is 0.0167. There are 7 homozygotes in gnomad4. There are 359 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High AC in GnomAd4 at 784 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
SPTLC2	NM_004863.4 linkuse as main transcript	c.1227G>A	p.Thr409=	synonymous_variant	9/12	ENST00000216484.7	NP_004854.1
SPTLC2	XM_011537384.3 linkuse as main transcript	c.1227G>A	p.Thr409=	synonymous_variant	9/10		XP_011535686.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
SPTLC2	ENST00000216484.7 linkuse as main transcript	c.1227G>A	p.Thr409=	synonymous_variant	9/12	1	NM_004863.4	ENSP00000216484	P1

Frequencies

GnomAD3 genomes

AF:

0.00513

AC:

780

AN:

152194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0177

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00196

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:

0.000162

Gnomad OTH

AF:

0.00335

GnomAD3 exomes

AF:

0.00140

AC:

352

AN:

251214

Hom.:

AF XY:

0.00105

AC XY:

142

AN XY:

135770

show subpopulations

Gnomad AFR exome

AF:

0.0185

Gnomad AMR exome

AF:

0.000839

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000981

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000123

Gnomad OTH exome

AF:

0.000979

GnomAD4 exome

AF:

0.000574

AC:

839

AN:

1461842

Hom.:

Cov.:

AF XY:

0.000517

AC XY:

376

AN XY:

727214

show subpopulations

Gnomad4 AFR exome

AF:

0.0181

Gnomad4 AMR exome

AF:

0.00103

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000800

Gnomad4 OTH exome

AF:

0.00149

GnomAD4 genome

AF:

0.00515

AC:

784

AN:

152312

Hom.:

Cov.:

AF XY:

0.00482

AC XY:

359

AN XY:

74486

show subpopulations

Gnomad4 AFR

AF:

0.0177

Gnomad4 AMR

AF:

0.00190

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000162

Gnomad4 OTH

AF:

0.00331

Alfa

AF:

0.00301

Hom.:

Bravo

AF:

0.00644

Asia WGS

AF:

0.00144

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000178

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Neuropathy, hereditary sensory and autonomic, type 1C

Benign:2

Benign, criteria provided, single submitter	clinical testing	ARUP Laboratories, Molecular Genetics and Genomics, ARUP Laboratories	Nov 22, 2023	- -
Benign, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	Jan 17, 2024	- -

not specified

Benign:1

Benign, criteria provided, single submitter

clinical testing

GeneDx

Feb 24, 2016

This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jul 11, 2019

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

not provided

Benign:1

Benign, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.49

CADD

Benign

7.7

DANN

Benign

0.76

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.6

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

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