Variant 20-18472891-A-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_006466.4(POLR3F):c.230A>G(p.Lys77Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000126 in 1,484,708 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00013 ( 1 hom. )

Consequence

POLR3F
NM_006466.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 8.58

Variant links:

Genes affected

POLR3F (HGNC:15763): (RNA polymerase III subunit F) The protein encoded by this gene is one of more than a dozen subunits forming eukaryotic RNA polymerase III (RNA Pol III), which transcribes 5S ribosomal RNA and tRNA genes. This protein has been shown to bind both TFIIIB90 and TBP, two subunits of RNA polymerase III transcription initiation factor IIIB (TFIIIB). Unlike most of the other RNA Pol III subunits, the encoded protein is unique to this polymerase. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Sep 2013]

POLR3F links:

POLR3F (HGNC:):

POLR3F links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.1310488).

BS2

High AC in GnomAd4 at 20 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
POLR3F	NM_006466.4 linkuse as main transcript	c.230A>G	p.Lys77Arg	missense_variant	3/9	ENST00000377603.5	NP_006457.2	Q9H1D9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
POLR3F	ENST00000377603.5 linkuse as main transcript	c.230A>G	p.Lys77Arg	missense_variant	3/9	1	NM_006466.4	ENSP00000366828.4		Q9H1D9

Frequencies

GnomAD3 genomes

AF:

0.000131

AC:

AN:

152140

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000262

Gnomad ASJ

AF:

0.00144

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00637

Gnomad NFE

AF:

0.0000882

Gnomad OTH

AF:

0.000955

GnomAD3 exomes

AF:

0.000213

AC:

AN:

234390

Hom.:

AF XY:

0.000236

AC XY:

AN XY:

127372

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000305

Gnomad ASJ exome

AF:

0.00207

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000166

Gnomad OTH exome

AF:

0.000541

GnomAD4 exome

AF:

0.000125

AC:

167

AN:

1332450

Hom.:

Cov.:

AF XY:

0.000144

AC XY:

AN XY:

668354

show subpopulations

Gnomad4 AFR exome

AF:

0.000264

Gnomad4 AMR exome

AF:

0.000224

Gnomad4 ASJ exome

AF:

0.00239

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000606

Gnomad4 OTH exome

AF:

0.000324

GnomAD4 genome

AF:

0.000131

AC:

AN:

152258

Hom.:

Cov.:

AF XY:

0.0000940

AC XY:

AN XY:

74458

show subpopulations

Gnomad4 AFR

AF:

0.0000240

Gnomad4 AMR

AF:

0.000262

Gnomad4 ASJ

AF:

0.00144

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.000945

Alfa

AF:

0.000362

Hom.:

Bravo

AF:

0.000159

ExAC

AF:

0.000115

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 21, 2023

This sequence change replaces lysine, which is basic and polar, with arginine, which is basic and polar, at codon 36 of the POLR3F protein (p.Lys36Arg). This variant is present in population databases (rs776454367, gnomAD 0.2%), and has an allele count higher than expected for a pathogenic variant. This variant has not been reported in the literature in individuals affected with POLR3F-related conditions. ClinVar contains an entry for this variant (Variation ID: 2173884). Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.096

BayesDel_addAF

Benign

-0.022

BayesDel_noAF

Uncertain

0.030

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.067

Eigen

Uncertain

0.25

Eigen_PC

Uncertain

0.40

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.91

M_CAP

Benign

0.0073

MetaRNN

Benign

0.13

MetaSVM

Benign

-0.88

MutationAssessor

Benign

1.5

PrimateAI

Uncertain

0.73

PROVEAN

Benign

-2.3

REVEL

Benign

0.17

Sift

Benign

0.10

Sift4G

Benign

0.36

Polyphen

0.43

Vest4

0.61

MVP

0.54

MPC

0.59

ClinPred

0.068

GERP RS

5.9

Varity_R

0.32

gMVP

0.46

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

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