Genetic Variant GTF3C2:p.Arg841His (chr2-27326889-C-T) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. The variant received -4 ACMG points: 0P and 4B. BS2

The NM_001035521.3(GTF3C2):c.2522G>A(p.Arg841His) variant causes a missense change. The variant allele was found at a frequency of 0.0000237 in 1,603,776 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000025 ( 0 hom. )

Consequence

GTF3C2
NM_001035521.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.90

Variant links:

Genes affected

GTF3C2 (HGNC:4665): (general transcription factor IIIC subunit 2) Contributes to DNA binding activity. Involved in transcription by RNA polymerase III. Located in nucleoplasm. Part of transcription factor TFIIIC complex. [provided by Alliance of Genome Resources, Apr 2022]

GTF3C2 links:

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ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -4 ACMG points.

BS2

High AC in GnomAdExome4 at 37 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GTF3C2	NM_001035521.3 link	c.2522G>A	p.Arg841His	missense_variant	Exon 19 of 19	ENST00000264720.8	NP_001030598.1	Q8WUA4-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GTF3C2	ENST00000264720.8 link	c.2522G>A	p.Arg841His	missense_variant	Exon 19 of 19	1	NM_001035521.3	ENSP00000264720.3		Q8WUA4-1

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151786

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

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

GnomAD4 exome

AF:

0.0000255

AC:

AN:

1451990

Hom.:

Cov.:

AF XY:

0.0000277

AC XY:

AN XY:

723060

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33286

American (AMR)

AF:

0.00

AC:

AN:

44692

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26036

East Asian (EAS)

AF:

0.00

AC:

AN:

39640

South Asian (SAS)

AF:

0.00

AC:

AN:

86044

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53354

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5742

European-Non Finnish (NFE)

AF:

0.0000335

AC:

AN:

1103124

Other (OTH)

AF:

0.00

AC:

AN:

60072

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.448

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000659

AC:

AN:

151786

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74104

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41274

American (AMR)

AF:

0.00

AC:

AN:

15248

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:

4812

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10492

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67998

Other (OTH)

AF:

0.00

AC:

AN:

2082

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.575

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000756

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 11, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.2522G>A (p.R841H) alteration is located in exon 20 (coding exon 18) of the GTF3C2 gene. This alteration results from a G to A substitution at nucleotide position 2522, causing the arginine (R) at amino acid position 841 to be replaced by a histidine (H). 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

0.24

BayesDel_addAF

Pathogenic

0.28

BayesDel_noAF

Pathogenic

0.17

CADD

Pathogenic

(source)

DANN

Pathogenic

1.0

DEOGEN2

Uncertain

0.42

T;T

Eigen

Uncertain

0.32

Eigen_PC

Uncertain

0.44

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.88

.;D

M_CAP

Benign

0.033

MetaRNN

Uncertain

0.67

D;D

MetaSVM

Benign

-0.91

MutationAssessor

Benign

1.6

L;L

PhyloP100

5.9

PrimateAI

Uncertain

0.79

PROVEAN

Benign

-2.2

N;N

REVEL

Uncertain

0.34

Sift

Benign

0.030

D;D

Sift4G

Benign

0.072

T;T

Polyphen

1.0

D;D

Vest4

0.69

MutPred

0.48

Loss of methylation at R841 (P = 0.0355);Loss of methylation at R841 (P = 0.0355);

MVP

0.38

MPC

0.66

ClinPred

0.92

GERP RS

5.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.25

gMVP

0.76

Mutation Taster

=52/48

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

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2-27326889-C-T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over