22-24719789-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_001255975.1(PIWIL3):c.2464C>T(p.Arg822Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000273 in 1,612,976 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 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. R822H) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000029 ( 0 hom. )

Consequence

PIWIL3
NM_001255975.1 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.0970

Variant links:

Genes affected

PIWIL3 (HGNC:18443): (piwi like RNA-mediated gene silencing 3) This gene encodes a member of the PIWI subfamily of Argonaute family proteins. This subfamily of proteins contains a PAZ domain, found in proteins involved in RNA-mediated gene silencing, and a C-terminal Piwi domain. The encoded protein is thought to function in maintenance of germline cells. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2011]

PIWIL3 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.3493929).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
PIWIL3	NM_001255975.1 linkuse as main transcript	c.2464C>T	p.Arg822Cys	missense_variant	20/21	ENST00000616349.5
PIWIL3	NM_001008496.3 linkuse as main transcript	c.2491C>T	p.Arg831Cys	missense_variant	20/21
PIWIL3	NR_045648.1 linkuse as main transcript	n.3095C>T		non_coding_transcript_exon_variant	21/22
PIWIL3	NR_045649.2 linkuse as main transcript	n.2968C>T		non_coding_transcript_exon_variant	21/22

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
PIWIL3	ENST00000616349.5 linkuse as main transcript	c.2464C>T	p.Arg822Cys	missense_variant	20/21	1	NM_001255975.1	A2
PIWIL3	ENST00000332271.9 linkuse as main transcript	c.2491C>T	p.Arg831Cys	missense_variant	20/21	1		P2
PIWIL3	ENST00000527701.6 linkuse as main transcript	c.*2436C>T		3_prime_UTR_variant, NMD_transcript_variant	21/22	1
PIWIL3	ENST00000533313.6 linkuse as main transcript	c.*2390C>T		3_prime_UTR_variant, NMD_transcript_variant	21/22	1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152120

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000318

AC:

AN:

251420

Hom.:

AF XY:

0.0000368

AC XY:

AN XY:

135890

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000528

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000288

AC:

AN:

1460856

Hom.:

Cov.:

AF XY:

0.0000275

AC XY:

AN XY:

726828

show subpopulations

Gnomad4 AFR exome

AF:

0.0000897

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000315

Gnomad4 OTH exome

AF:

0.0000663

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152120

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74306

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000386

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 27, 2021

The c.2491C>T (p.R831C) alteration is located in exon 20 (coding exon 19) of the PIWIL3 gene. This alteration results from a C to T substitution at nucleotide position 2491, causing the arginine (R) at amino acid position 831 to be replaced by a cysteine (C). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.13

BayesDel_addAF

Benign

-0.39

BayesDel_noAF

Benign

-0.57

Cadd

Benign

7.9

Dann

Uncertain

0.98

DEOGEN2

Benign

0.026

T;T;.;.

Eigen

Benign

-1.1

Eigen_PC

Benign

-1.3

FATHMM_MKL

Benign

0.018

LIST_S2

Uncertain

0.91

D;.;.;D

M_CAP

Benign

0.0018

MetaRNN

Benign

0.35

T;T;T;T

MetaSVM

Benign

-0.95

MutationAssessor

Benign

1.8

L;L;.;.

MutationTaster

Benign

0.98

D;D;D

PrimateAI

Benign

0.29

Sift4G

Uncertain

0.051

T;T;D;D

Polyphen

0.90

P;P;B;B

Vest4

0.34

MutPred

0.64

Gain of catalytic residue at L832 (P = 0.0099);Gain of catalytic residue at L832 (P = 0.0099);.;.;

MVP

0.33

MPC

0.15

ClinPred

0.20

GERP RS

-5.6

Varity_R

0.13

gMVP

0.23

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.11

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over