14-95094004-C-T

Variant names:

• chr14-95094004-C-T
• rs1184678913
• NM_177438.3:c.5248G>A

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2_Supporting BP4 PM1_Supporting

This summary comes from the ClinGen Evidence Repository: The NM_177438.2:c.5248G>A variant in DICER1 is a missense variant predicted to cause substitution of valine by isoleucine at amino acid 1750 (p.Val1750Ile). This variant has an allele frequency of 0.000004221 (1/236924 alleles) across gnomAD v2.1.1 (non-cancer) with no more than one allele in any subpopulation, which is lower than the ClinGen DICER1 VCEP threshold (<0.000005) for PM2_Supporting, and therefore meets this criterion (PM2_Supporting). In silico tools predict no damaging impact of the variant on protein function (REVEL: 0.304; MaxEntScan and SpliceAI: no effect on splicing) (BP4). This variant resides within the RNase IIIb mutational hotspot domain with critical functionality as defined by the ClinGen DICER1 VCEP (PM1_Supporting; PMID:31342592). Due to conflicting evidence, this variant is classified as a variant of unknown significance for DICER1-related tumor predisposition based on the ACMG/AMP criteria applied, as specified by the ClinGen DICER1 VCEP: PM1_supporting, PM2_supporting, BP4. (Bayesian Points: 1; VCEP specifications version 1.2.0; 08/22/23) LINK:https://erepo.genome.network/evrepo/ui/classification/CA390865129/MONDO:0100216/024

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: DICER1 NM_030621.4 missense
• Clinical Significance: Uncertain significance reviewed by expert panel U:3
• Conservation: PhyloP100: 7.50
• Publications: 0 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: Uncertain_significance. The variant received 1 ACMG points.

• PM1: For more information check the summary or visit ClinGen Evidence Repository.
• PM2: For more information check the summary or visit ClinGen Evidence Repository.
• BP4: For more information check the summary or visit ClinGen Evidence Repository.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_030621.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DICER1	NM_177438.3	MANE Select	c.5248G>A	p.Val1750Ile	missense	Exon 24 of 27	NP_803187.1
	DICER1	NM_001271282.3		c.5248G>A	p.Val1750Ile	missense	Exon 24 of 27	NP_001258211.1
	DICER1	NM_001291628.2		c.5248G>A	p.Val1750Ile	missense	Exon 24 of 27	NP_001278557.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DICER1	ENST00000343455.8	TSL:1 MANE Select	c.5248G>A	p.Val1750Ile	missense	Exon 24 of 27	ENSP00000343745.3
	DICER1	ENST00000393063.6	TSL:1	c.5248G>A	p.Val1750Ile	missense	Exon 26 of 29	ENSP00000376783.1
	DICER1	ENST00000527414.5	TSL:1	c.5248G>A	p.Val1750Ile	missense	Exon 24 of 27	ENSP00000435681.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.00000398 AC: 1 AN: 251462 AF XY: 0.00

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 FIN exome AF: 0.0000462

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461892 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 727246

African (AFR) AF: 0.00 AC: 0 AN: 33478

American (AMR) AF: 0.00 AC: 0 AN: 44724

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26136

East Asian (EAS) AF: 0.00 AC: 0 AN: 39700

South Asian (SAS) AF: 0.00 AC: 0 AN: 86258

European-Finnish (FIN) AF: 0.0000187 AC: 1 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5768

European-Non Finnish (NFE) AF: 8.99e-7 AC: 1 AN: 1112012

Other (OTH) AF: 0.00 AC: 0 AN: 60396

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: reviewed by expert panel

Pathogenic	VUS	Benign	Condition
-	2	-	DICER1-related tumor predisposition (2)
-	1	-	Hereditary cancer-predisposing syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.25
BayesDel_addAF	Uncertain	0.094	D
BayesDel_noAF	Benign	-0.10
CADD	Uncertain	25
DANN	Pathogenic	1.0
DEOGEN2	Benign	0.38	T
Eigen	Uncertain	0.58
Eigen_PC	Uncertain	0.56
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.93	D
M_CAP	Uncertain	0.11	D
MetaRNN	Uncertain	0.47	T
MetaSVM	Uncertain	-0.024	T
MutationAssessor	Uncertain	2.2	M
PhyloP100		7.5
PrimateAI	Pathogenic	0.83	D
PROVEAN	Benign	-0.93	N
REVEL	Uncertain	0.30
Sift	Benign	0.050	D
Sift4G	Uncertain	0.027	D
Polyphen		0.99	D
Vest4		0.56
MutPred		0.51		Loss of phosphorylation at Y1754 (P = 0.1997)
MVP		0.70
MPC		2.2
ClinPred		0.80	D
GERP RS		5.3
Varity_R		0.47
gMVP		0.48
Mutation Taster		=42/58	disease causing

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs1184678913; hg19: chr14-95560341;