chr16-2496769-G-C

Position:

chr16-2496769-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 4P and 1B. PM1PM2BP4

The NM_001199107.2(TBC1D24):c.621G>C(p.Gln207His) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,674 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: not found (cov: 33)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

TBC1D24
NM_001199107.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 2.33

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 Uncertain_significance. Variant got 3 ACMG points.

PM1

In a domain Rab-GAP TBC (size 215) in uniprot entity TBC24_HUMAN there are 17 pathogenic changes around while only 3 benign (85%) in NM_001199107.2

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.26908624).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TBC1D24	NM_001199107.2 linkuse as main transcript	c.621G>C	p.Gln207His	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.621G>C	p.Gln207His	missense_variant	2/8		NM_001199107.2	ENSP00000494678	A1	Q9ULP9-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000401

AC:

AN:

249232

Hom.:

AF XY:

0.00000739

AC XY:

AN XY:

135316

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1461674

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

727164

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000116

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:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine

Apr 07, 2016

The p.Gln207His variant in TBC1D24 has not been previously reported in individua ls with hearing loss or in large population studies. Computational prediction to ols and conservation analyses do not provide strong support for or against an im pact to the protein. In summary, the clinical significance of the p.Gln207His va riant is uncertain. -

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

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 11, 2023

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. 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 not expected to disrupt TBC1D24 protein function. ClinVar contains an entry for this variant (Variation ID: 229285). This variant has not been reported in the literature in individuals affected with TBC1D24-related conditions. This variant is present in population databases (no rsID available, gnomAD 0.003%). This sequence change replaces glutamine, which is neutral and polar, with histidine, which is basic and polar, at codon 207 of the TBC1D24 protein (p.Gln207His). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.15

BayesDel_addAF

Benign

-0.22

BayesDel_noAF

Benign

-0.46

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.020

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

Eigen

Uncertain

0.22

Eigen_PC

Uncertain

0.24

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.95

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

M_CAP

Benign

0.012

MetaRNN

Benign

0.27

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

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.6

L;L;L;.;.;L;.

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Benign

0.33

PROVEAN

Benign

-1.6

N;.;N;.;.;.;N

REVEL

Benign

0.085

Sift

Uncertain

0.014

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

Sift4G

Uncertain

0.0050

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

Polyphen

0.94

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

Vest4

0.28

MutPred

0.39

Loss of catalytic residue at Q207 (P = 0.0601);Loss of catalytic residue at Q207 (P = 0.0601);Loss of catalytic residue at Q207 (P = 0.0601);Loss of catalytic residue at Q207 (P = 0.0601);Loss of catalytic residue at Q207 (P = 0.0601);Loss of catalytic residue at Q207 (P = 0.0601);Loss of catalytic residue at Q207 (P = 0.0601);

MVP

0.67

MPC

0.90, 0.98

ClinPred

0.64

GERP RS

4.3

Varity_R

0.21

gMVP

0.17

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