14-77506294-A-AT

Position:

• chr14-77506294-A-AT

Variant summary

Our verdict is Benign. Variant got -10 ACMG points: 0P and 10B. BP6_Moderate BS1 BS2

The NM_004863.4(SPTLC2):​c.*5989_*5990insA variant causes a 3 prime UTR change. The variant allele was found at a frequency of 0.000289 in 152,358 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Likely benign (★).

• Frequency: Genomes: 𝑓 0.00029 (0 hom., cov: 32)
• Consequence: SPTLC2 NM_004863.4 3_prime_UTR
• Clinical Significance: Likely benign criteria provided, single submitter B:1
• Conservation: PhyloP100: 4.33

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]

ACMG classification

Verdict is Benign. Variant got -10 ACMG points.

• BP6: Variant 14-77506294-A-AT is Benign according to our data. Variant chr14-77506294-A-AT is described in ClinVar as [Likely_benign]. Clinvar id is 314573.Status of the report is criteria_provided_single_submitter, 1 stars.
• BS1: Variant frequency is greater than expected in population eas. gnomad4 allele frequency = 0.000289 (44/152358) while in subpopulation EAS AF= 0.00597 (31/5190). AF 95% confidence interval is 0.00432. There are 0 homozygotes in gnomad4. There are 30 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.
• BS2: High AC in GnomAd4 at 44 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
SPTLC2	NM_004863.4	c.*5989_*5990insA		3_prime_UTR_variant	12/12	ENST00000216484.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
SPTLC2	ENST00000216484.7	c.*5989_*5990insA		3_prime_UTR_variant	12/12	1	NM_004863.4	P1
SPTLC2	ENST00000686627.1	n.6710_6711insA		non_coding_transcript_exon_variant	5/5
SPTLC2	ENST00000687688.1	n.7441_7442insA		non_coding_transcript_exon_variant	9/9
SPTLC2	ENST00000692906.1	n.7410_7411insA		non_coding_transcript_exon_variant	11/11

Frequencies

GnomAD3 genomes AF: 0.000289 AC: 44 AN: 152240 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00202

Gnomad EAS AF: 0.00596

Gnomad SAS AF: 0.000414

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000441

Gnomad OTH AF: 0.000478

GnomAD4 exome Cov.: 0

GnomAD4 genome AF: 0.000289 AC: 44 AN: 152358 Hom.: 0 Cov.: 32 AF XY: 0.000403 AC XY: 30 AN XY: 74512

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00202

Gnomad4 EAS AF: 0.00597

Gnomad4 SAS AF: 0.000414

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000441

Gnomad4 OTH AF: 0.000473

Alfa AF: 0.0000712 Hom.: 0

Bravo AF: 0.000336

Asia WGS AF: 0.00462 AC: 16 AN: 3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

Submissions by phenotype

Neuropathy, hereditary sensory and autonomic, type 1C Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jun 14, 2016

- -

Computational scores

Source: dbNSFP v4.3

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

Other links and lift over

dbSNP: rs149453307; hg19: chr14-77972637;