rs1060502699
Variant summary
Our verdict is Uncertain significance. Variant got 5 ACMG points: 5P and 0B. PM1PM2PP3
The NM_007194.4(CHEK2):c.1261C>T(p.Leu421Phe) variant causes a missense, splice region change. The variant allele was found at a frequency of 0.00000657 in 152,132 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 2/3 splice prediction tools predicting alterations to normal splicing. 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. L421H) has been classified as Uncertain significance.
Frequency
Consequence
NM_007194.4 missense, splice_region
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 5 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
CHEK2 | NM_007194.4 | c.1261C>T | p.Leu421Phe | missense_variant, splice_region_variant | 12/15 | ENST00000404276.6 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
CHEK2 | ENST00000404276.6 | c.1261C>T | p.Leu421Phe | missense_variant, splice_region_variant | 12/15 | 1 | NM_007194.4 | P2 |
Frequencies
GnomAD3 genomes ? AF: 0.00000657 AC: 1AN: 152132Hom.: 0 Cov.: 32
GnomAD4 exome Cov.: 23
GnomAD4 genome ? AF: 0.00000657 AC: 1AN: 152132Hom.: 0 Cov.: 32 AF XY: 0.0000135 AC XY: 1AN XY: 74302
ClinVar
Submissions by phenotype
Familial cancer of breast Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Oct 19, 2020 | 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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals with CHEK2-related conditions. ClinVar contains an entry for this variant (Variation ID: 410027). This variant is not present in population databases (ExAC no frequency). This sequence change replaces leucine with phenylalanine at codon 421 of the CHEK2 protein (p.Leu421Phe). The leucine residue is highly conserved and there is a small physicochemical difference between leucine and phenylalanine. - |
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Aug 03, 2016 | The p.L421F variant (also known as c.1261C>T), located in coding exon 11 of the CHEK2 gene, results from a C to T substitution at nucleotide position 1261. The leucine at codon 421 is replaced by phenylalanine, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, this alteration is predicted to be deleterious by in silico analysis. 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