16-2054343-G-T
Variant summary
Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP6
The NM_000548.5(TSC2):c.384G>T(p.Lys128Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,138 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K128T) has been classified as Uncertain significance.
Frequency
Consequence
NM_000548.5 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 1 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
TSC2 | NM_000548.5 | c.384G>T | p.Lys128Asn | missense_variant | 5/42 | ENST00000219476.9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
TSC2 | ENST00000219476.9 | c.384G>T | p.Lys128Asn | missense_variant | 5/42 | 5 | NM_000548.5 |
Frequencies
GnomAD3 genomes ? AF: 0.00000657 AC: 1AN: 152138Hom.: 0 Cov.: 33
GnomAD3 exomes AF: 0.00000398 AC: 1AN: 251476Hom.: 0 AF XY: 0.00000736 AC XY: 1AN XY: 135912
GnomAD4 exome Cov.: 31
GnomAD4 genome ? AF: 0.00000657 AC: 1AN: 152138Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0AN XY: 74314
ClinVar
Submissions by phenotype
Tuberous sclerosis syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | All of Us Research Program, National Institutes of Health | Nov 02, 2023 | This missense variant replaces lysine with asparagine at codon 128 of the TSC2 protein. Computational prediction suggests that this variant may not impact protein structure and function (internally defined REVEL score threshold <= 0.5, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with tuberous sclerosis complex in the literature. This variant has been identified in 1/251476 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance. - |
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Jul 14, 2021 | The p.K128N variant (also known as c.384G>T), located in coding exon 4 of the TSC2 gene, results from a G to T substitution at nucleotide position 384. The lysine at codon 128 is replaced by asparagine, an amino acid with similar properties. This amino acid position is not well conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. - |
Tuberous sclerosis 2 Benign:1
Benign, criteria provided, single submitter | clinical testing | Invitae | Nov 01, 2023 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at