rs756051157
Variant summary
Our verdict is Likely benign. The variant received -5 ACMG points: 0P and 5B. BP6BS2
The NM_177438.3(DICER1):āc.1883A>Gā(p.Asn628Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000242 in 1,614,052 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. N628T) 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: 0.0000263 AC: 4AN: 152182Hom.: 0 Cov.: 32 show subpopulations
GnomAD2 exomes AF: 0.0000278 AC: 7AN: 251468 AF XY: 0.0000147 show subpopulations
GnomAD4 exome AF: 0.0000239 AC: 35AN: 1461870Hom.: 0 Cov.: 32 AF XY: 0.0000151 AC XY: 11AN XY: 727236 show subpopulations
GnomAD4 genome AF: 0.0000263 AC: 4AN: 152182Hom.: 0 Cov.: 32 AF XY: 0.0000404 AC XY: 3AN XY: 74336 show subpopulations
ClinVar
Submissions by phenotype
not provided Uncertain:2
The DICER1 c.1883A>G (p.Asn628Ser) variant has been observed in an individual undergoing genetic testing for Lynch syndrome (PMID: 38136308 (2023)). The frequency of this variant in the general population, 0.00039 (4/10370 chromosomes in Ashkenazi Jewish subpopulation (Genome Aggregation Database, http://gnomad.broadinstitute.org)), is higher than would generally be expected for pathogenic variants in this gene. Analysis of this variant using bioinformatics tools for the prediction of the effect of amino acid changes on protein structure and function yielded predictions that this variant is damaging. Based on the available information, we are unable to determine the clinical significance of this variant. -
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 -
Hereditary cancer-predisposing syndrome Uncertain:1Benign:1
This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -
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Global developmental delay - lung cysts - overgrowth - Wilms tumor syndrome Uncertain:1
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DICER1-related disorder Uncertain:1
The DICER1 c.1883A>G variant is predicted to result in the amino acid substitution p.Asn628Ser. To our knowledge, this variant has not been reported in the literature. This variant is reported in 0.039% of alleles in individuals of Ashkenazi Jewish descent in gnomAD (http://gnomad.broadinstitute.org/variant/14-95582028-T-C). At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -
DICER1-related tumor predisposition Benign:1
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Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at