rs201298288
Variant summary
Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP6BS2
The NM_177438.3(DICER1):c.1691C>T(p.Ala564Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000205 in 1,613,286 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. A564G) has been classified as Uncertain significance.
Frequency
Consequence
NM_177438.3 missense
Scores
Clinical Significance
Conservation
Publications
- DICER1-related tumor predispositionInheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
- pleuropulmonary blastomaInheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
- DICER1 syndromeInheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
- global developmental delay - lung cysts - overgrowth - Wilms tumor syndromeInheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)
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ACMG classification
Our verdict: Likely_benign. The variant received -5 ACMG points.
Transcripts
RefSeq
Ensembl
Frequencies
GnomAD3 genomes AF: 0.0000527 AC: 8AN: 151916Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.0000318 AC: 8AN: 251178 AF XY: 0.0000442 show subpopulations
GnomAD4 exome AF: 0.0000171 AC: 25AN: 1461252Hom.: 0 Cov.: 32 AF XY: 0.0000206 AC XY: 15AN XY: 726934 show subpopulations
Age Distribution
GnomAD4 genome AF: 0.0000526 AC: 8AN: 152034Hom.: 0 Cov.: 32 AF XY: 0.0000269 AC XY: 2AN XY: 74310 show subpopulations
Age Distribution
ClinVar
Submissions by phenotype
not provided Uncertain:3
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In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge -
to the best of our knowledge, the variant has not been reported in the published literature. The frequency of this variant in the general population, 0.000062 (8/128970 chromosomes, http://gnomad.broadinstitute.org), is uninformative in assessment of its pathogenicity. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded conflicting predictions that this variant is benign or damaging. Based on the available information, we are unable to determine the clinical significance of this variant. -
Hereditary cancer-predisposing syndrome Uncertain:2
The p.A564V variant (also known as c.1691C>T), located in coding exon 9 of the DICER1 gene, results from a C to T substitution at nucleotide position 1691. The alanine at codon 564 is replaced by valine, an amino acid with similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Based on the available evidence, the clinical significance of this variant remains unclear. -
BP4 -
DICER1-related tumor predisposition Benign:2
This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as likely benign is not then subjected to further curation. The score for this variant resulted in a classification of likely benign for this disease. -
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not specified Uncertain:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at