rs774808090

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_006070.6(TFG):c.68G>A(p.Arg23Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000168 in 1,610,546 control chromosomes in the GnomAD database, including 1 homozygotes. 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. R23L) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000033 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000015 ( 1 hom. )

Consequence

TFG
NM_006070.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:4

Conservation

PhyloP100: 9.29

Variant links:

Genes affected

TFG (HGNC:11758): (trafficking from ER to golgi regulator) There are several documented fusion oncoproteins encoded partially by this gene. This gene also participates in several oncogenic rearrangements resulting in anaplastic lymphoma and mixoid chondrosarcoma, and may play a role in the NF-kappaB pathway. Multiple transcript variants have been found for this gene. [provided by RefSeq, Sep 2010]

TFG links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TFG	NM_006070.6 linkuse as main transcript	c.68G>A	p.Arg23Gln	missense_variant	2/8	ENST00000240851.9

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TFG	ENST00000240851.9 linkuse as main transcript	c.68G>A	p.Arg23Gln	missense_variant	2/8	1	NM_006070.6	P4	Q92734-1

Frequencies

GnomAD3 genomes

AF:

0.0000329

AC:

AN:

152002

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

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

GnomAD3 exomes

AF:

0.0000120

AC:

AN:

250624

Hom.:

AF XY:

0.0000148

AC XY:

AN XY:

135424

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:

0.0000330

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000151

AC:

AN:

1458544

Hom.:

Cov.:

AF XY:

0.0000193

AC XY:

AN XY:

725582

show subpopulations

Gnomad4 AFR exome

AF:

0.000150

Gnomad4 AMR exome

AF:

0.0000448

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000700

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000360

Gnomad4 OTH exome

AF:

0.0000664

GnomAD4 genome

AF:

0.0000329

AC:

AN:

152002

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74242

show subpopulations

Gnomad4 AFR

AF:

0.000121

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:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000193

Hom.:

Bravo

AF:

0.0000491

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:4

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:2

Uncertain significance, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -
Uncertain significance, no assertion criteria provided	clinical testing	Clinical Genetics, Academic Medical Center	-	- -

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Feb 05, 2020

The p.R23Q variant (also known as c.68G>A), located in coding exon 1 of the TFG gene, results from a G to A substitution at nucleotide position 68. The arginine at codon 23 is replaced by glutamine, an amino acid with highly similar properties. This amino acid position is highly conserved in available vertebrate species. In addition, the in silico prediction for this alteration is inconclusive. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -

Hereditary motor and sensory neuropathy, Okinawa type;C3714897:Hereditary spastic paraplegia 57

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jan 23, 2024

This sequence change replaces arginine, which is basic and polar, with glutamine, which is neutral and polar, at codon 23 of the TFG protein (p.Arg23Gln). This variant is present in population databases (rs774808090, gnomAD 0.01%). This missense change has been observed in individual(s) with Parkinson disease (PMID: 35642252). ClinVar contains an entry for this variant (Variation ID: 579063). Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt TFG protein function with a positive predictive value of 80%. 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

Pathogenic

1.0

BayesDel_addAF

Benign

-0.030

BayesDel_noAF

Uncertain

-0.040

Cadd

Pathogenic

Dann

Pathogenic

1.0

Eigen

Uncertain

0.67

Eigen_PC

Pathogenic

0.69

FATHMM_MKL

Pathogenic

0.99

M_CAP

Benign

0.051

MetaRNN

Uncertain

0.61

D;D;D;D;D;D;D;D;D

MetaSVM

Benign

-0.80

MutationAssessor

Uncertain

2.9

M;M;M;M;.;M;.;.;M

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Pathogenic

0.81

Sift4G

Uncertain

0.012

D;D;D;D;D;D;D;D;D

Polyphen

0.93

.;.;P;P;.;.;.;.;.

Vest4

0.89

MVP

0.66

MPC

1.2

ClinPred

0.96

GERP RS

5.0

Varity_R

0.55

gMVP

0.82

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

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