rs1400591449
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Variant summary
Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBP7
The NM_006415.4(SPTLC1):āc.51T>Gā(p.Leu17=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,198 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (ā ).
Frequency
Genomes: š 0.0000066 ( 0 hom., cov: 32)
Consequence
SPTLC1
NM_006415.4 synonymous
NM_006415.4 synonymous
Scores
2
Clinical Significance
Conservation
PhyloP100: -0.294
Genes affected
SPTLC1 (HGNC:11277): (serine palmitoyltransferase long chain base subunit 1) This gene encodes a member of the class-II pyridoxal-phosphate-dependent aminotransferase family. The encoded protein is the long chain base subunit 1 of serine palmitoyltransferase. Serine palmitoyltransferase converts L-serine and palmitoyl-CoA to 3-oxosphinganine with pyridoxal 5'-phosphate and is the key enzyme in sphingolipid biosynthesis. Mutations in this gene were identified in patients with hereditary sensory neuropathy type 1. Alternatively spliced variants encoding different isoforms have been identified. Pseudogenes of this gene have been defined on chromosomes 1, 6, 10, and 13. [provided by RefSeq, Jul 2013]
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ACMG classification
Classification made for transcript
Verdict is Likely_benign. Variant got -3 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
BP4
?
Computational evidence support a benign effect (BayesDel_noAF=-0.85).
BP7
?
Synonymous conserved (PhyloP=-0.294 with no splicing effect.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SPTLC1 | NM_006415.4 | c.51T>G | p.Leu17= | synonymous_variant | 1/15 | ENST00000262554.7 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SPTLC1 | ENST00000262554.7 | c.51T>G | p.Leu17= | synonymous_variant | 1/15 | 1 | NM_006415.4 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.00000657 AC: 1AN: 152198Hom.: 0 Cov.: 32
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GnomAD4 exome Cov.: 32
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GnomAD4 genome ? AF: 0.00000657 AC: 1AN: 152198Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1AN XY: 74358
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Hereditary sensory and autonomic neuropathy type 1 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | May 27, 2017 | In summary, this variant has uncertain impact on SPTLC1 function. The available evidence is currently insufficient to determine its role in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site, but this prediction has not been confirmed by published transcriptional studies. This variant has not been reported in the literature in individuals with an SPTLC1-related disease. This variant is not present in population databases (ExAC no frequency). This sequence change affects codon 17 of the SPTLC1 mRNA. It is a 'silent' change, meaning that it does not change the encoded amino acid sequence of the SPTLC1 protein. - |
Computational scores
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Name
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BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
RBP_binding_hub_radar
RBP_regulation_power_radar
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at