chr12-106357902-T-C

Variant names:

Variant summary

Our verdict is Likely benign. The variant received -1 ACMG points: 1P and 2B. PP2BP4_Moderate

The NM_018082.6(POLR3B):c.23T>C(p.Phe8Ser) variant causes a missense change. The variant allele was found at a frequency of 0.0000062 in 1,613,446 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000055 ( 0 hom. )

Consequence

POLR3B
NM_018082.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.71

Publications

1 publications found

Variant links:

Genes affected

POLR3B (HGNC:30348): (RNA polymerase III subunit B) This gene encodes the second largest subunit of RNA polymerase III, the polymerase responsible for synthesizing transfer and small ribosomal RNAs in eukaryotes. The largest subunit and the encoded protein form the catalytic center of RNA polymerase III. Mutations in this gene are a cause of hypomyelinating leukodystrophy. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Dec 2011]

POLR3B Gene-Disease associations (from GenCC):

hypomyelinating leukodystrophy 8 with or without oligodontia and-or hypogonadotropic hypogonadism
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: Illumina, Labcorp Genetics (formerly Invitae), G2P
neurodevelopmental disorder
Inheritance: AR, AD Classification: DEFINITIVE, STRONG Submitted by: G2P
POLR3B-related disorder
Inheritance: AR, AD Classification: DEFINITIVE Submitted by: ClinGen
Charcot-Marie-Tooth disease, demyelinating, IIA 1I
Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae)
endosteal sclerosis-cerebellar hypoplasia syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
hypomyelination-hypogonadotropic hypogonadism-hypodontia syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

POLR3B links:

ENSG00000297327 (HGNC:):

ENSG00000297327 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -1 ACMG points.

PP2

Missense variant in the POLR3B gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 24 curated pathogenic missense variants (we use a threshold of 10). The gene has 6 curated benign missense variants. Gene score misZ: 3.1978 (above the threshold of 3.09). Trascript score misZ: 3.4842 (above the threshold of 3.09). GenCC associations: The gene is linked to hypomyelinating leukodystrophy 8 with or without oligodontia and-or hypogonadotropic hypogonadism, neurodevelopmental disorder, endosteal sclerosis-cerebellar hypoplasia syndrome, hypomyelination-hypogonadotropic hypogonadism-hypodontia syndrome, Charcot-Marie-Tooth disease, demyelinating, IIA 1I.

BP4

Computational evidence support a benign effect (MetaRNN=0.22274154).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_018082.6. 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
	POLR3B	NM_018082.6	MANE Select	c.23T>C	p.Phe8Ser	missense	Exon 1 of 28	NP_060552.4
	POLR3B	NM_001160708.2		c.-423T>C		upstream_gene	N/A	NP_001154180.1	Q9NW08-2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
POLR3B	ENST00000228347.9	TSL:1 MANE Select	c.23T>C	p.Phe8Ser	missense	Exon 1 of 28	ENSP00000228347.4	Q9NW08-1
POLR3B	ENST00000970165.1		c.23T>C	p.Phe8Ser	missense	Exon 1 of 29	ENSP00000640224.1
POLR3B	ENST00000887559.1		c.23T>C	p.Phe8Ser	missense	Exon 1 of 28	ENSP00000557618.1

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152122

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000547

AC:

AN:

1461324

Hom.:

Cov.:

AF XY:

0.00000550

AC XY:

AN XY:

726950

show subpopulations

African (AFR)

AF:

0.0000896

AC:

AN:

33468

American (AMR)

AF:

0.00

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.0000504

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86206

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53384

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5416

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111956

Other (OTH)

AF:

0.0000497

AC:

AN:

60344

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152122

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74300

show subpopulations

African (AFR)

AF:

0.0000483

AC:

AN:

41428

American (AMR)

AF:

0.00

AC:

AN:

15278

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5182

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68002

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

ClinVar submissions as Germline

Significance:Uncertain significance

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.25

BayesDel_addAF

Uncertain

0.086

BayesDel_noAF

Benign

-0.11

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.032

Eigen

Benign

-0.35

Eigen_PC

Benign

-0.17

FATHMM_MKL

Uncertain

0.84

LIST_S2

Benign

0.73

M_CAP

Benign

0.038

MetaRNN

Benign

0.22

MetaSVM

Benign

-0.85

MutationAssessor

Benign

0.0

PhyloP100

3.7

PrimateAI

Uncertain

0.64

PROVEAN

Benign

-0.21

REVEL

Uncertain

0.32

Sift

Benign

0.051

Sift4G

Benign

0.11

Polyphen

0.010

Vest4

0.44

MutPred

0.60

Gain of disorder (P = 0.0018)

MVP

0.75

MPC

1.1

ClinPred

0.78

GERP RS

4.0

PromoterAI

-0.025

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.24

gMVP

0.75

Mutation Taster

=75/25

polymorphism

(source)

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

Publications

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over