NM_177438.3:c.4472G>A

Variant names:

• chr14-95096448-C-T
• rs878855267
• NM_177438.3:c.4472G>A

Variant summary

Our verdict is Likely benign. The variant received -3 ACMG points: 2P and 5B. PM2 BP4_Strong BP6

The NM_177438.3(DICER1):​c.4472G>A​(p.Ser1491Asn) 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. 17/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. S1491I) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: DICER1 NM_177438.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:1
• Conservation: PhyloP100: 0.853
• 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: Likely_benign. The variant received -3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.035205424).
• BP6: Variant 14-95096448-C-T is Benign according to our data. Variant chr14-95096448-C-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 1368697.

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.4472G>A	p.Ser1491Asn	missense	Exon 23 of 27	NP_803187.1	Q9UPY3-1
	DICER1	NM_001271282.3		c.4472G>A	p.Ser1491Asn	missense	Exon 23 of 27	NP_001258211.1	Q9UPY3-1
	DICER1	NM_001291628.2		c.4472G>A	p.Ser1491Asn	missense	Exon 23 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.4472G>A	p.Ser1491Asn	missense	Exon 23 of 27	ENSP00000343745.3	Q9UPY3-1
	DICER1	ENST00000393063.6	TSL:1	c.4472G>A	p.Ser1491Asn	missense	Exon 25 of 29	ENSP00000376783.1	Q9UPY3-1
	DICER1	ENST00000527414.5	TSL:1	c.4472G>A	p.Ser1491Asn	missense	Exon 23 of 27	ENSP00000435681.1	Q9UPY3-1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

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

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.061
BayesDel_addAF	Benign	-0.15	T
BayesDel_noAF	Benign	-0.45
CADD	Benign	11
DANN	Benign	0.88
DEOGEN2	Benign	0.20	T
Eigen	Benign	-0.75
Eigen_PC	Benign	-0.69
FATHMM_MKL	Benign	0.13	N
LIST_S2	Benign	0.76	T
M_CAP	Benign	0.019	T
MetaRNN	Benign	0.035	T
MetaSVM	Benign	-0.88	T
MutationAssessor	Benign	-0.55	N
PhyloP100		0.85
PrimateAI	Benign	0.35	T
PROVEAN	Benign	0.80	N
REVEL	Benign	0.065
Sift	Benign	0.67	T
Sift4G	Benign	0.52	T
Polyphen		0.0	B
Vest4		0.11
MutPred		0.37		Gain of catalytic residue at S1491 (P = 0.0198)
MVP		0.47
MPC		0.46
ClinPred		0.039	T
GERP RS		2.1
Varity_R		0.028
gMVP		0.11
Mutation Taster		=97/3	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs878855267; hg19: chr14-95562785;