14-95104072-G-C

Variant names:

• chr14-95104072-G-C
• rs765205680
• NM_177438.3:c.3324C>G

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 4P and 1B. PM1 PM2 BP4

The NM_177438.3(DICER1):​c.3324C>G​(p.Ile1108Met) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 15/22 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. I1108F) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 32)
• Consequence: DICER1 NM_177438.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.92
• 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 3 ACMG points.

• PM1: In a hotspot region, there are 2 aminoacids with missense pathogenic changes in the window of +-8 aminoacids around while only 4 benign, 28 uncertain in NM_177438.3
• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.31239462).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_177438.3. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DICER1	NM_177438.3	MANE Select	c.3324C>G	p.Ile1108Met	missense	Exon 21 of 27	NP_803187.1	Q9UPY3-1
	DICER1	NM_001271282.3		c.3324C>G	p.Ile1108Met	missense	Exon 21 of 27	NP_001258211.1	Q9UPY3-1
	DICER1	NM_001291628.2		c.3324C>G	p.Ile1108Met	missense	Exon 21 of 27	NP_001278557.1	Q9UPY3-1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DICER1	ENST00000343455.8	TSL:1 MANE Select	c.3324C>G	p.Ile1108Met	missense	Exon 21 of 27	ENSP00000343745.3	Q9UPY3-1
	DICER1	ENST00000393063.6	TSL:1	c.3324C>G	p.Ile1108Met	missense	Exon 23 of 29	ENSP00000376783.1	Q9UPY3-1
	DICER1	ENST00000527414.5	TSL:1	c.3324C>G	p.Ile1108Met	missense	Exon 21 of 27	ENSP00000435681.1	Q9UPY3-1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	DICER1-related tumor predisposition (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.088
BayesDel_addAF	Benign	-0.021	T
BayesDel_noAF	Benign	-0.27
CADD	Uncertain	24
DANN	Benign	0.93
DEOGEN2	Benign	0.25	T
Eigen	Benign	-0.074
Eigen_PC	Benign	0.099
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Benign	0.80	T
M_CAP	Benign	0.021	T
MetaRNN	Benign	0.31	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	1.7	L
PhyloP100		2.9
PrimateAI	Uncertain	0.57	T
PROVEAN	Benign	0.35	N
REVEL	Benign	0.11
Sift	Benign	0.062	T
Sift4G	Benign	0.11	T
Polyphen		0.070	B
Vest4		0.56
MutPred		0.27		Loss of sheet (P = 0.0126)
MVP		0.77
MPC		0.51
ClinPred		0.36	T
GERP RS		5.8
Varity_R		0.066
gMVP		0.39
Mutation Taster		=74/26	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.070		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: rs765205680; hg19: chr14-95570409;