Variant chr9-69035858-C-T details in Genebe, Genetics Data Aggregator

Variant summary

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

The NM_000144.5(FXN):c.76C>T(p.Arg26Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

FXN
NM_000144.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.518

Variant links:

Genes affected

FXN (HGNC:3951): (frataxin) This nuclear gene encodes a mitochondrial protein which belongs to the FRATAXIN family. The protein functions in regulating mitochondrial iron transport and respiration. The expansion of intronic trinucleotide repeat GAA from 8-33 repeats to >90 repeats results in Friedreich ataxia. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2016]

FXN links:

(HGNC:):

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=0.19955659).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
FXN	NM_000144.5 linkuse as main transcript	c.76C>T	p.Arg26Trp	missense_variant	1/5	ENST00000484259.3	NP_000135.2
FXN	NM_181425.3 linkuse as main transcript	c.76C>T	p.Arg26Trp	missense_variant	1/5		NP_852090.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
FXN	ENST00000484259.3 linkuse as main transcript	c.76C>T	p.Arg26Trp	missense_variant	1/5	3	NM_000144.5	ENSP00000419243	P1	Q16595-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

Data not reliable, filtered out with message: AC0

AF:

0.00

AC:

AN:

1345772

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

663354

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Apr 26, 2023

The c.76C>T (p.R26W) alteration is located in exon 1 (coding exon 1) of the FXN gene. This alteration results from a C to T substitution at nucleotide position 76, causing the arginine (R) at amino acid position 26 to be replaced by a tryptophan (W). 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

0.13

BayesDel_addAF

Uncertain

0.053

BayesDel_noAF

Benign

-0.16

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.30

T;.;.;T;.;.

Eigen

Benign

-0.82

Eigen_PC

Benign

-1.0

FATHMM_MKL

Benign

0.048

LIST_S2

Benign

0.56

.;T;T;T;T;T

M_CAP

Uncertain

0.18

MetaRNN

Benign

0.20

T;T;T;T;T;T

MetaSVM

Uncertain

0.11

MutationAssessor

Benign

1.5

L;L;L;L;.;.

MutationTaster

Benign

1.0

N;N;N

PrimateAI

Uncertain

0.68

PROVEAN

Benign

-0.64

.;N;N;N;.;.

REVEL

Uncertain

0.33

Sift

Benign

0.042

.;D;D;D;.;.

Sift4G

Uncertain

0.045

.;D;D;.;.;.

Polyphen

0.024

B;D;.;B;.;.

Vest4

0.13, 0.23

MutPred

0.35

Gain of catalytic residue at L24 (P = 0.0028);Gain of catalytic residue at L24 (P = 0.0028);Gain of catalytic residue at L24 (P = 0.0028);Gain of catalytic residue at L24 (P = 0.0028);Gain of catalytic residue at L24 (P = 0.0028);Gain of catalytic residue at L24 (P = 0.0028);

MVP

0.49

ClinPred

0.66

GERP RS

-2.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.062

gMVP

0.30

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