rs587778233

Variant summary

Our verdict is Likely benign. Variant got -5 ACMG points: 1P and 6B. PP2BP4_ModerateBS2

The NM_177438.3(DICER1):c.5516G>A(p.Arg1839Gln) variant causes a missense change. The variant allele was found at a frequency of 0.000106 in 1,613,922 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign 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. R1839W) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 33)

Exomes 𝑓: 0.00011 ( 0 hom. )

Consequence

DICER1
NM_177438.3 missense

Scores

Clinical Significance

Uncertain significance reviewed by expert panel U:7B:1O:1

Conservation

PhyloP100: 3.70

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 Likely_benign. Variant got -5 ACMG points.

PP2

Missense variant where missense usually causes diseases, DICER1

BP4

Computational evidence support a benign effect (MetaRNN=0.11829716).

BS2

High AC in GnomAdExome at 8 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
DICER1	NM_177438.3 linkuse as main transcript	c.5516G>A	p.Arg1839Gln	missense_variant	25/27	ENST00000343455.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
DICER1	ENST00000343455.8 linkuse as main transcript	c.5516G>A	p.Arg1839Gln	missense_variant	25/27	1	NM_177438.3	P1	Q9UPY3-1

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152052

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000318

AC:

AN:

251396

Hom.:

AF XY:

0.0000294

AC XY:

AN XY:

135868

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:

0.0000704

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000115

AC:

168

AN:

1461870

Hom.:

Cov.:

AF XY:

0.0000949

AC XY:

AN XY:

727240

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

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:

0.000148

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152052

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74248

show subpopulations

Gnomad4 AFR

AF:

0.0000242

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:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000658

Hom.:

Bravo

AF:

0.0000189

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000178

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:7Benign:1Other:1

Revision: reviewed by expert panel

LINK: link

Submissions by phenotype

DICER1-related tumor predisposition

Uncertain:2Benign:1

Uncertain significance, reviewed by expert panel	curation	ClinGen DICER1 and miRNA-Processing Gene Variant Curation Expert Panel, ClinGen	Apr 25, 2023	The NM_177438.2:c.5516G>A variant in DICER1 is a missense variant predicted to cause substitution of arginine by glutamine at amino acid 1839 (p.Arg1839Gln). 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: Invitae; Ambry). The highest population minor allele frequency in gnomAD v2.1.1 is 0.00006196 (8/129108 alleles) in European (non-Finnish) population (PM2_Supporting, BS1, and BA1 are not met). This variant resides within the RNase IIIb domain of DICER1, a mutational hotspot domain with critical functional as defined by the ClinGen DICER1 VCEP (PM1_Supporting; PMID: 31342592). The computational predictor REVEL gives a score of 0.234, which is below the threshold of 0.5, and the splice site predictors MaxEntScan and SpliceAI indicate that the variant has no impact on splicing, evidence that does not predict a damaging effect on DICER1 function (BP4). Due to conflicting evidence, this variant is classified as a variant of unknown significance for DICER1 syndrome based on the ACMG/AMP criteria applied, as specified by the ClinGen DICER1 VCEP: BS2_Supporting, PM1_Supporting, BP4. (Bayesian Points: -1; VCEP specifications version 1.1.0; 04/25/2023) -
Uncertain significance, criteria provided, single submitter	clinical testing	Illumina Laboratory Services, Illumina	Jan 13, 2018	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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. -
Likely benign, criteria provided, single submitter	clinical testing	Invitae	Feb 01, 2024	- -

Hereditary cancer-predisposing syndrome

Uncertain:2

Uncertain significance, criteria provided, single submitter	clinical testing	Ambry Genetics	Aug 28, 2023	The p.R1839Q variant (also known as c.5516G>A), located in coding exon 24 of the DICER1 gene, results from a G to A substitution at nucleotide position 5516. The arginine at codon 1839 is replaced by glutamine, an amino acid with highly similar properties. This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
Uncertain significance, criteria provided, single submitter	curation	Sema4, Sema4	Feb 05, 2022	- -

not specified

Uncertain:1Other:1

not provided, no classification provided	reference population	ITMI	Sep 19, 2013	- -
Uncertain significance, criteria provided, single submitter	clinical testing	Center for Genomic Medicine, Rigshospitalet, Copenhagen University Hospital	Aug 15, 2023	- -

Global developmental delay - lung cysts - overgrowth - Wilms tumor syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Baylor Genetics

Oct 16, 2023

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Mar 23, 2022

Has not been previously published as pathogenic or benign to our knowledge; In silico analysis supports that this missense variant does not alter protein structure/function; This variant is associated with the following publications: (PMID: 24728327) -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.063

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.33

Cadd

Uncertain

Dann

Uncertain

0.99

DEOGEN2

Benign

0.26

T;T;T;T;.

Eigen

Benign

-0.39

Eigen_PC

Benign

-0.21

FATHMM_MKL

Uncertain

0.92

M_CAP

Benign

0.020

MetaRNN

Benign

0.12

T;T;T;T;T

MetaSVM

Benign

-0.66

MutationAssessor

Benign

0.40

N;N;N;N;.

MutationTaster

Benign

0.98

D;D;D;D;D;D

PrimateAI

Uncertain

0.67

PROVEAN

Benign

-0.99

N;N;N;N;N

REVEL

Benign

0.23

Sift

Benign

0.21

T;T;T;T;T

Sift4G

Benign

0.11

T;T;T;T;T

Polyphen

0.0010

B;B;B;B;.

Vest4

0.21

MVP

0.58

MPC

1.4

ClinPred

0.17

GERP RS

4.7

Varity_R

0.11

gMVP

0.62

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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