rs1424143421
Variant summary
Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3
The NM_000057.4(BLM):c.2746C>G(p.Leu916Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000248 in 1,614,046 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L916F) has been classified as Uncertain significance.
Frequency
Consequence
NM_000057.4 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 3 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
BLM | NM_000057.4 | c.2746C>G | p.Leu916Val | missense_variant | 14/22 | ENST00000355112.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
BLM | ENST00000355112.8 | c.2746C>G | p.Leu916Val | missense_variant | 14/22 | 1 | NM_000057.4 | P2 |
Frequencies
GnomAD3 genomes ? AF: 0.00000657 AC: 1AN: 152160Hom.: 0 Cov.: 31
GnomAD4 exome AF: 0.00000205 AC: 3AN: 1461886Hom.: 0 Cov.: 31 AF XY: 0.00000275 AC XY: 2AN XY: 727244
GnomAD4 genome ? AF: 0.00000657 AC: 1AN: 152160Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0AN XY: 74326
ClinVar
Submissions by phenotype
Bloom syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Nov 14, 2023 | This sequence change replaces leucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 916 of the BLM protein (p.Leu916Val). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with BLM-related conditions. ClinVar contains an entry for this variant (Variation ID: 454117). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt BLM protein function with a negative predictive value of 80%. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. - |
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Feb 16, 2024 | The p.L916V variant (also known as c.2746C>G), located in coding exon 13 of the BLM gene, results from a C to G substitution at nucleotide position 2746. The leucine at codon 916 is replaced by valine, an amino acid with highly similar properties. This amino acid position is conserved. 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. - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at