1-235380120-G-A

Variant summary

Our verdict is Likely benign. Variant got -1 ACMG points: 0P and 1B. BP4

The NM_003193.5(TBCE):c.71G>A(p.Arg24His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000465 in 1,611,860 control chromosomes in the GnomAD database, including 3 homozygotes. 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 (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R24C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000040 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000047 ( 3 hom. )

Consequence

TBCE
NM_003193.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 0.731

Variant links:

Genes affected

TBCE (HGNC:11582): (tubulin folding cofactor E) Cofactor E is one of four proteins (cofactors A, D, E, and C) involved in the pathway leading to correctly folded beta-tubulin from folding intermediates. Cofactors A and D are believed to play a role in capturing and stabilizing beta-tubulin intermediates in a quasi-native confirmation. Cofactor E binds to the cofactor D/beta-tubulin complex; interaction with cofactor C then causes the release of beta-tubulin polypeptides that are committed to the native state. Two transcript variants encoding the same protein have been found for this gene. [provided by RefSeq, Jul 2008]

TBCE links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -1 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.40592006).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
TBCE	NM_003193.5 linkuse as main transcript	c.71G>A	p.Arg24His	missense_variant	2/17	ENST00000642610.2
TBCE	NM_001287801.2 linkuse as main transcript	c.71G>A	p.Arg24His	missense_variant	2/18
TBCE	NM_001079515.3 linkuse as main transcript	c.71G>A	p.Arg24His	missense_variant	2/17
TBCE	NM_001287802.2 linkuse as main transcript	c.-240G>A		5_prime_UTR_variant	2/16

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TBCE	ENST00000642610.2 linkuse as main transcript	c.71G>A	p.Arg24His	missense_variant	2/17		NM_003193.5	P1	Q15813-1

Frequencies

GnomAD3 genomes

AF:

0.0000397

AC:

AN:

151314

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:

0.000417

Gnomad FIN

AF:

0.0000962

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000442

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000477

AC:

AN:

251468

Hom.:

AF XY:

0.0000589

AC XY:

AN XY:

135908

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000163

Gnomad SAS exome

AF:

0.000229

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000176

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000472

AC:

AN:

1460426

Hom.:

Cov.:

AF XY:

0.0000523

AC XY:

AN XY:

726516

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000758

Gnomad4 SAS exome

AF:

0.000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000279

Gnomad4 OTH exome

AF:

0.0000829

GnomAD4 genome

AF:

0.0000396

AC:

AN:

151434

Hom.:

Cov.:

AF XY:

0.0000541

AC XY:

AN XY:

73944

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000417

Gnomad4 FIN

AF:

0.0000962

Gnomad4 NFE

AF:

0.0000442

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000564

Hom.:

Bravo

AF:

0.0000189

ExAC

AF:

0.0000576

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Encephalopathy, progressive, with amyotrophy and optic atrophy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Baylor Genetics

Feb 23, 2018

This variant was determined to be of uncertain significance according to ACMG Guidelines, 2015 [PMID:25741868]. -

Autosomal recessive Kenny-Caffey syndrome;C1855840:Hypoparathyroidism-retardation-dysmorphism syndrome;C4310667:Encephalopathy, progressive, with amyotrophy and optic atrophy

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

May 17, 2022

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Mar 21, 2022

This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 24 of the TBCE protein (p.Arg24His). This variant is present in population databases (rs766386026, gnomAD 0.02%). This variant has not been reported in the literature in individuals affected with TBCE-related conditions. ClinVar contains an entry for this variant (Variation ID: 1033981). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The histidine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. 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

Benign

0.11

BayesDel_addAF

Benign

-0.27

BayesDel_noAF

Benign

-0.33

Cadd

Benign

Dann

Benign

0.97

DEOGEN2

Uncertain

0.75

D;D;D;D;D;.;.;D;D;D;.;.;.;.;.;.;.

Eigen

Benign

-0.30

Eigen_PC

Benign

-0.34

FATHMM_MKL

Benign

0.72

M_CAP

Benign

0.063

MetaRNN

Benign

0.41

T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T;T

MetaSVM

Uncertain

-0.0094

MutationAssessor

Uncertain

2.5

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

MutationTaster

Benign

0.99

D;D;D

PrimateAI

Benign

0.39

Polyphen

0.98

D;D;D;D;D;.;.;D;D;D;.;.;.;.;.;.;.

Vest4

0.29, 0.33, 0.29

MutPred

0.77

Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);Loss of methylation at R24 (P = 0.0165);

MVP

0.85

MPC

0.39

ClinPred

0.097

GERP RS

1.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.026

gMVP

0.77

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