2-48620897-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_006872.5(GTF2A1L):c.68G>A(p.Arg23Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000231 in 1,603,696 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 (★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000023 ( 0 hom. )

Consequence

GTF2A1L
NM_006872.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.05

Variant links:

Genes affected

GTF2A1L (HGNC:30727): (general transcription factor IIA subunit 1 like) The assembly and stability of the RNA polymerase II transcription pre-initiation complex on a eukaryotic core promoter involve the effects of transcription factor IIA (TFIIA) on the interaction between TATA-binding protein (TBP) and DNA. This gene encodes a germ cell-specific counterpart of the large (alpha/beta) subunit of general transcription factor TFIIA that is able to stabilize the binding of TBP to DNA and may be uniquely important to testis biology. Alternative splicing for this locus has been observed and two variants, encoding distinct isoforms, have been identified. Co-transcription of this gene and the neighboring upstream gene generates a rare transcript (SALF), which encodes a fusion protein comprised of sequence sharing identity with each individual gene product. [provided by RefSeq, Mar 2014]

GTF2A1L links:

STON1-GTF2A1L (HGNC:):

STON1-GTF2A1L links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.17149198).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GTF2A1L	NM_006872.5 linkuse as main transcript	c.68G>A	p.Arg23Gln	missense_variant	2/9	ENST00000403751.8
STON1-GTF2A1L	NM_001198593.2 linkuse as main transcript	c.2180G>A	p.Arg727Gln	missense_variant	4/11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GTF2A1L	ENST00000403751.8 linkuse as main transcript	c.68G>A	p.Arg23Gln	missense_variant	2/9	1	NM_006872.5	P1	Q9UNN4-1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

151970

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:

0.000192

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:

0.0000779

AC:

AN:

243854

Hom.:

AF XY:

0.0000453

AC XY:

AN XY:

132320

show subpopulations

Gnomad AFR exome

AF:

0.000125

Gnomad AMR exome

AF:

0.000273

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000280

Gnomad SAS exome

AF:

0.0000336

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000182

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000227

AC:

AN:

1451610

Hom.:

Cov.:

AF XY:

0.0000208

AC XY:

AN XY:

721958

show subpopulations

Gnomad4 AFR exome

AF:

0.0000603

Gnomad4 AMR exome

AF:

0.000254

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000256

Gnomad4 SAS exome

AF:

0.0000356

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000126

Gnomad4 OTH exome

AF:

0.0000334

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152086

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74360

show subpopulations

Gnomad4 AFR

AF:

0.0000482

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000453

ExAC

AF:

0.0000659

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3476

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

Feb 28, 2024

The c.68G>A (p.R23Q) alteration is located in exon 2 (coding exon 2) of the GTF2A1L gene. This alteration results from a G to A substitution at nucleotide position 68, causing the arginine (R) at amino acid position 23 to be replaced by a glutamine (Q). 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

0.076

BayesDel_addAF

Benign

-0.22

BayesDel_noAF

Benign

-0.26

Cadd

Benign

Dann

Pathogenic

1.0

Eigen

Benign

0.062

Eigen_PC

Benign

0.069

FATHMM_MKL

Uncertain

0.84

M_CAP

Benign

0.082

MetaRNN

Benign

0.17

T;T;T;T;T;T

MetaSVM

Benign

-0.33

MutationTaster

Benign

0.67

N;N;N;N;N;D;N

PrimateAI

Benign

0.33

PROVEAN

Benign

-1.1

N;N;N;N;D;D

REVEL

Benign

0.27

Sift

Benign

0.071

T;T;T;T;T;T

Sift4G

Benign

0.069

T;T;T;T;D;T

Polyphen

0.12

B;.;B;.;.;D

Vest4

0.42

MVP

0.38

MPC

0.013, 0.011

ClinPred

0.080

GERP RS

3.8

Varity_R

0.10

gMVP

0.42

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.10

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