14-95107660-T-C

Variant names:

• chr14-95107660-T-C
• rs377326167
• NM_177438.3:c.2752A>G

Variant summary

Our verdict is Benign. The variant received -7 ACMG points: 0P and 7B. BP4_Moderate BP6 BS2

The NM_177438.3(DICER1):​c.2752A>G​(p.Thr918Ala) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000157 in 1,461,224 control chromosomes in the GnomAD database, with no homozygous occurrence. 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 Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. T918S) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.000016 (0 hom.)
• Consequence: DICER1 NM_177438.3 missense
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2 B:1
• Conservation: PhyloP100: 3.30
• 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: Benign. The variant received -7 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.08035645).
• BP6: Variant 14-95107660-T-C is Benign according to our data. Variant chr14-95107660-T-C is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 647500.
• BS2: High AC in GnomAdExome4 at 23 AD,Unknown gene.

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	DICER1	NM_177438.3	MANE Select	c.2752A>G	p.Thr918Ala	missense	Exon 17 of 27	NP_803187.1
	DICER1	NM_001271282.3		c.2752A>G	p.Thr918Ala	missense	Exon 17 of 27	NP_001258211.1
	DICER1	NM_001291628.2		c.2752A>G	p.Thr918Ala	missense	Exon 17 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.2752A>G	p.Thr918Ala	missense	Exon 17 of 27	ENSP00000343745.3
	DICER1	ENST00000393063.6	TSL:1	c.2752A>G	p.Thr918Ala	missense	Exon 19 of 29	ENSP00000376783.1
	DICER1	ENST00000527414.5	TSL:1	c.2752A>G	p.Thr918Ala	missense	Exon 17 of 27	ENSP00000435681.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD2 exomes AF: 0.0000119 AC: 3 AN: 251320 AF XY: 0.00000736

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000289

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000176

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.0000157 AC: 23 AN: 1461224 Hom.: 0 Cov.: 32 AF XY: 0.00000825 AC XY: 6 AN XY: 726946

African (AFR) AF: 0.00 AC: 0 AN: 33464

American (AMR) AF: 0.0000224 AC: 1 AN: 44722

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 26132

East Asian (EAS) AF: 0.00 AC: 0 AN: 39692

South Asian (SAS) AF: 0.00 AC: 0 AN: 86248

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 53420

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5766

European-Non Finnish (NFE) AF: 0.0000180 AC: 20 AN: 1111402

Other (OTH) AF: 0.0000331 AC: 2 AN: 60378

GnomAD4 genome Cov.: 32

Alfa AF: 0.00 Hom.: 0

Bravo AF: 0.00000378

ExAC AF: 0.0000165 AC: 2

EpiCase AF: 0.0000545

EpiControl AF: 0.00

ClinVar

ClinVar submissions as Germline

Significance: Conflicting classifications of pathogenicity

Revision: criteria provided, conflicting classifications

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

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.067
BayesDel_addAF	Benign	-0.31	T
BayesDel_noAF	Benign	-0.60
CADD	Benign	17
DANN	Benign	0.87
DEOGEN2	Benign	0.11	T
Eigen	Benign	-0.47
Eigen_PC	Benign	-0.25
FATHMM_MKL	Uncertain	0.94	D
LIST_S2	Benign	0.74	T
M_CAP	Benign	0.0050	T
MetaRNN	Benign	0.080	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.26	N
PhyloP100		3.3
PrimateAI	Uncertain	0.53	T
PROVEAN	Benign	-0.21	N
REVEL	Benign	0.087
Sift	Benign	0.57	T
Sift4G	Benign	0.78	T
Polyphen		0.0	B
Vest4		0.12
MutPred		0.47		Loss of phosphorylation at T918 (P = 0.0363)
MVP		0.31
MPC		0.48
ClinPred		0.054	T
GERP RS		3.4
Varity_R		0.11
gMVP		0.50
Mutation Taster		=74/26	polymorphism

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.0		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: rs377326167; hg19: chr14-95573997;