chr14-95094149-G-C

Variant names:

• chr14-95094149-G-C
• rs875989780
• NM_177438.3:c.5103C>G

Variant summary

Our verdict is Pathogenic. The variant received 18 ACMG points: 18P and 0B. PVS1 PM2 PP5_Very_Strong

The NM_177438.3(DICER1):​c.5103C>G​(p.Tyr1701*) variant causes a stop gained change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★). Synonymous variant affecting the same amino acid position (i.e. Y1701Y) has been classified as Likely benign. Variant results in nonsense mediated mRNA decay.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DICER1 NM_177438.3 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:3
• Conservation: PhyloP100: 6.38
• Publications: 2 publications found

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 Gene-Disease associations (from GenCC):

• DICER1-related tumor predisposition

  Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
• pleuropulmonary blastoma

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
• DICER1 syndrome

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• global developmental delay - lung cysts - overgrowth - Wilms tumor syndrome

  Inheritance: Unknown Classification: LIMITED Submitted by: Labcorp Genetics (formerly Invitae)

ACMG classification

Our verdict: Pathogenic. The variant received 18 ACMG points.

• PVS1: Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 14-95094149-G-C is Pathogenic according to our data. Variant chr14-95094149-G-C is described in ClinVar as Pathogenic. ClinVar VariationId is 523888.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
DICER1	NM_177438.3	c.5103C>G	p.Tyr1701*	stop_gained	Exon 24 of 27	ENST00000343455.8	NP_803187.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
DICER1	ENST00000343455.8	c.5103C>G	p.Tyr1701*	stop_gained	Exon 24 of 27	1	NM_177438.3	ENSP00000343745.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 33

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not provided Pathogenic:1

Apr 27, 2018

GeneDx

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The Y1701X variant in the DICER1 gene has not been reported previously as a pathogenic variant nor as a benign variant, to our knowledge. However, a different nucleotide substitution (c.5103 C>A) resulting in the Y1701X variant has been reported previously in an individual with a pineoblastoma (de Kock et al., 2014). The Y1701X variant is predicted to cause loss of normal protein function either through protein truncation or nonsense-mediated mRNA decay. The Y1701X variant is not observed in large population cohorts (Lek et al., 2016). We interpret Y1701X as a pathogenic variant.

DICER1-related tumor predisposition Pathogenic:1

Dec 22, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Tyr1701*) in the DICER1 gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in DICER1 are known to be pathogenic (PMID: 19556464, 21266384). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with pineoblastoma and thyroid nodule (PMID: 25022261). ClinVar contains an entry for this variant (Variation ID: 523888). For these reasons, this variant has been classified as Pathogenic.

Hereditary cancer-predisposing syndrome Pathogenic:1

Jul 01, 2019

Ambry Genetics

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The p.Y1701* pathogenic mutation (also known as c.5103C>G), located in coding exon 23 of the DICER1 gene, results from a C to G substitution at nucleotide position 5103. This changes the amino acid from a tyrosine to a stop codon within coding exon 23. This alteration is expected to result in loss of function by premature protein truncation or nonsense-mediated mRNA decay. As such, this alteration is interpreted as a disease-causing mutation.

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.63
CADD	Pathogenic	46
DANN	Uncertain	1.0
DEOGEN2	Benign	0.0	.;.;.;.;.;.
Eigen	Pathogenic	0.91
Eigen_PC	Pathogenic	0.78
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Benign	0.0	.;.;.;.;.;.
MetaRNN	Benign	0.0	.;.;.;.;.;.
MutationAssessor	Benign	0.0	.;.;.;.;.;.
PhyloP100		6.4
PROVEAN	Benign	0.0	.;.;.;.;.;.
REVEL	Benign	0.0
Sift	Pathogenic	0.0	.;.;.;.;.;.
Sift4G	Pathogenic	0.0	.;.;.;.;.;.
Vest4		0.97
GERP RS		4.3
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Mutation Taster		=0/200	disease causing (ClinVar)

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

Other links and lift over

dbSNP: rs875989780; hg19: chr14-95560486; COSMIC: COSV109432704;