rs760474458

Positions:

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PP3_StrongPP5_Very_Strong

The NM_001199107.2(TBC1D24):c.119G>A(p.Arg40His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000411 in 1,461,398 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000041 ( 0 hom. )

Consequence

TBC1D24
NM_001199107.2 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:3

Conservation

PhyloP100: 9.59

Variant links:

Genes affected

TBC1D24 (HGNC:29203): (TBC1 domain family member 24) This gene encodes a protein with a conserved domain, referred to as the TBC domain, characteristic of proteins which interact with GTPases. TBC domain proteins may serve as GTPase-activating proteins for a particular group of GTPases, the Rab (Ras-related proteins in brain) small GTPases which are involved in the regulation of membrane trafficking. Mutations in this gene are associated with familial infantile myoclonic epilepsy. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Feb 2011]

TBC1D24 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 ACMG points.

PP3

MetaRNN computational evidence supports a deleterious effect, 0.96

PP5

Variant 16-2496267-G-A is Pathogenic according to our data. Variant chr16-2496267-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 856852.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-2496267-G-A is described in Lovd as [Likely_pathogenic]. Variant chr16-2496267-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TBC1D24	NM_001199107.2 linkuse as main transcript	c.119G>A	p.Arg40His	missense_variant	2/8	ENST00000646147.1	NP_001186036.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TBC1D24	ENST00000646147.1 linkuse as main transcript	c.119G>A	p.Arg40His	missense_variant	2/8		NM_001199107.2	ENSP00000494678	A1	Q9ULP9-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000402

AC:

AN:

249018

Hom.:

AF XY:

0.00

AC XY:

AN XY:

135266

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000557

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000411

AC:

AN:

1461398

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727016

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000378

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Abnormality of the nervous system

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Kariminejad - Najmabadi Pathology & Genetics Center

Jul 10, 2021

- -

not provided

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

GeneDx

Jan 31, 2024

Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 30180405, 31112829, 33333793, 34120799) -

Developmental and epileptic encephalopathy, 1;C3892048:Autosomal dominant nonsyndromic hearing loss 65;CN236805:Caused by mutation in the TBC1 domain family, member 24

Pathogenic:1

Pathogenic, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 29, 2022

This sequence change replaces arginine, which is basic and polar, with histidine, which is basic and polar, at codon 40 of the TBC1D24 protein (p.Arg40His). This variant is present in population databases (no rsID available, gnomAD 0.006%). This missense change has been observed in individual(s) with clinical features of DOORS syndrome (PMID: 31112829, 33333793; Invitae). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. ClinVar contains an entry for this variant (Variation ID: 856852). 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 TBC1D24 protein function. This variant disrupts the p.Arg40 amino acid residue in TBC1D24. Other variant(s) that disrupt this residue have been determined to be pathogenic (PMID: 24291220, 27669036, 31257402; Invitae). This suggests that this residue is clinically significant, and that variants that disrupt this residue are likely to be disease-causing. For these reasons, this variant has been classified as Pathogenic. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.90

BayesDel_addAF

Uncertain

0.11

BayesDel_noAF

Uncertain

0.090

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.32

.;T;T;.;.;.;.

Eigen

Pathogenic

0.87

Eigen_PC

Pathogenic

0.86

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.99

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

M_CAP

Pathogenic

0.53

MetaRNN

Pathogenic

0.96

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

MetaSVM

Uncertain

-0.16

MutationAssessor

Uncertain

2.5

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

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Uncertain

0.64

PROVEAN

Uncertain

-4.3

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

REVEL

Pathogenic

0.69

Sift

Pathogenic

0.0

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

Sift4G

Pathogenic

0.0

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

Polyphen

1.0

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

Vest4

0.77

MutPred

0.84

Loss of MoRF binding (P = 0.0152);Loss of MoRF binding (P = 0.0152);Loss of MoRF binding (P = 0.0152);Loss of MoRF binding (P = 0.0152);Loss of MoRF binding (P = 0.0152);Loss of MoRF binding (P = 0.0152);Loss of MoRF binding (P = 0.0152);

MVP

0.94

MPC

1.2, 1.6

ClinPred

1.0

GERP RS

5.6

Varity_R

0.71

gMVP

0.86

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