14-95091226-T-G

Variant names:

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 1P and 1B. PM1_SupportingBS2_Supporting

This summary comes from the ClinGen Evidence Repository: The NM_177438.2:c.5504A>C variant in DICER1 is a missense variant predicted to cause substitution of Tyrosine by Serine at amino acid 1835 (p.Tyr1835Ser). The highest population minor allele frequency in gnomAD v.2.1.1 (non-cancer) is 0.00001948 (2/102670 alleles) in the European (Non-Finnish) population (PM2_Supporting, BS1, and BA1 are not met). The computational predictor REVEL gives a score of 0.676, which is neither above nor below the thresholds predicting a damaging or benign impact on DICER1 function (PP3 and BP4 not met). This variant resides within the RNase IIIb domain of DICER1, a mutational hotspot domain with critical functionality as defined by the ClinGen DICER1 VCEP (PM1_Supporting; PMID:31342592). This variant has been seen in 10 or more unrelated females without tumors through age 50 in at least one testing laboratory (BS2_Supporting; Internal lab contributors, GTR Lab ID: 50003). In summary, this variant meets the criteria to be classified as Uncertain Significance for DICER1 syndrome based on the ACMG/AMP criteria applied, as specified by the ClinGen DICER1 VCEP: PM1_Supporting, BS2_Supporting. (Bayesian Points: 0; VCEP specifications version 1.1.0; 04/25/2023) LINK:https://erepo.genome.network/evrepo/ui/classification/CV479625/MONDO:0017288/024

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

DICER1
NM_177438.3 missense

Scores

Clinical Significance

Uncertain significance reviewed by expert panel U:3

Conservation

PhyloP100: 7.50

Variant links:

Genes affected

DICER1 (HGNC:17098): (dicer 1, ribonuclease III) This gene encodes a protein possessing an RNA helicase motif containing a DEXH box in its amino terminus and an RNA motif in the carboxy terminus. The encoded protein functions as a ribonuclease and is required by the RNA interference and small temporal RNA (stRNA) pathways to produce the active small RNA component that represses gene expression. This protein also acts as a strong antiviral agent with activity against RNA viruses, including the Zika and SARS-CoV-2 viruses. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2021]

DICER1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM1

For more information check the summary or visit ClinGen Evidence Repository.

BS2

For more information check the summary or visit ClinGen Evidence Repository.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DICER1	NM_177438.3 link	c.5504A>C	p.Tyr1835Ser	missense_variant	Exon 25 of 27	ENST00000343455.8	NP_803187.1	Q9UPY3-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DICER1	ENST00000343455.8 link	c.5504A>C	p.Tyr1835Ser	missense_variant	Exon 25 of 27	1	NM_177438.3	ENSP00000343745.3		Q9UPY3-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152184

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000159

AC:

AN:

251404

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135870

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000264

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.00000821

AC:

AN:

1461874

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000108

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152184

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74346

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000225

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

DICER1-related tumor predisposition

Uncertain:2

Nov 03, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces tyrosine, which is neutral and polar, with serine, which is neutral and polar, at codon 1835 of the DICER1 protein (p.Tyr1835Ser). This variant is present in population databases (rs747510783, gnomAD 0.003%). This missense change has been observed in individual(s) with head and neck squamous cell carcinoma (PMID: 30672147). ClinVar contains an entry for this variant (Variation ID: 479625). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt DICER1 protein function with a negative predictive value of 95%. 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. -

Apr 25, 2023

ClinGen DICER1 and miRNA-Processing Gene Variant Curation Expert Panel, ClinGen

Significance: Uncertain significance

Review Status: reviewed by expert panel

Collection Method: curation

The NM_177438.2:c.5504A>C variant in DICER1 is a missense variant predicted to cause substitution of Tyrosine by Serine at amino acid 1835 (p.Tyr1835Ser). The highest population minor allele frequency in gnomAD v.2.1.1 (non-cancer) is 0.00001948 (2/102670 alleles) in the European (Non-Finnish) population (PM2_Supporting, BS1, and BA1 are not met). The computational predictor REVEL gives a score of 0.676, which is neither above nor below the thresholds predicting a damaging or benign impact on DICER1 function (PP3 and BP4 not met). This variant resides within the RNase IIIb domain of DICER1, a mutational hotspot domain with critical functionality as defined by the ClinGen DICER1 VCEP (PM1_Supporting; PMID: 31342592). This variant has been seen in 10 or more unrelated females without tumors through age 50 in at least one testing laboratory (BS2_Supporting; Internal lab contributors, GTR Lab ID: 50003). In summary, this variant meets the criteria to be classified as Uncertain Significance for DICER1 syndrome based on the ACMG/AMP criteria applied, as specified by the ClinGen DICER1 VCEP: PM1_Supporting, BS2_Supporting. (Bayesian Points: 0; VCEP specifications version 1.1.0; 04/25/2023) -

Hereditary cancer-predisposing syndrome

Uncertain:1

Feb 08, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Y1835S variant (also known as c.5504A>C), located in coding exon 24 of the DICER1 gene, results from an A to C substitution at nucleotide position 5504. The tyrosine at codon 1835 is replaced by serine, an amino acid with dissimilar 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. Based on the available evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.44

BayesDel_addAF

Pathogenic

0.24

BayesDel_noAF

Pathogenic

0.16

CADD

Uncertain

DANN

Uncertain

0.98

DEOGEN2

Pathogenic

0.82

D;D;D;D;.

Eigen

Uncertain

0.31

Eigen_PC

Uncertain

0.32

FATHMM_MKL

Pathogenic

0.98

LIST_S2

Uncertain

0.91

.;.;D;.;D

M_CAP

Uncertain

0.098

MetaRNN

Uncertain

0.61

D;D;D;D;D

MetaSVM

Uncertain

0.11

MutationAssessor

Benign

1.7

L;L;L;L;.

PrimateAI

Uncertain

0.65

PROVEAN

Pathogenic

-6.2

D;D;D;D;D

REVEL

Pathogenic

0.68

Sift

Benign

0.12

T;T;T;T;T

Sift4G

Benign

0.17

T;T;T;T;T

Polyphen

0.93

P;P;P;P;.

Vest4

0.67

MutPred

0.47

Gain of MoRF binding (P = 0.079);Gain of MoRF binding (P = 0.079);Gain of MoRF binding (P = 0.079);Gain of MoRF binding (P = 0.079);.;

MVP

0.92

MPC

2.5

ClinPred

0.73

GERP RS

5.6

Varity_R

0.76

gMVP

0.80

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over