chr16-2496933-C-T

Position:

chr16-2496933-C-T

Variant summary

Our verdict is Benign. Variant got -18 ACMG points: 2P and 20B. PM1BP4_StrongBP6_Very_StrongBS1BS2

The NM_001199107.2(TBC1D24):c.785C>T(p.Ser262Leu) variant causes a missense change. The variant allele was found at a frequency of 0.000616 in 1,614,036 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 Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. S262S) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0019 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00048 ( 2 hom. )

Consequence

TBC1D24
NM_001199107.2 missense

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:10

Conservation

PhyloP100: 5.72

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 Benign. Variant got -18 ACMG points.

PM1

In a domain Rab-GAP TBC (size 215) in uniprot entity TBC24_HUMAN there are 40 pathogenic changes around while only 10 benign (80%) in NM_001199107.2

BP4

Computational evidence support a benign effect (MetaRNN=0.0070180893).

BP6

Variant 16-2496933-C-T is Benign according to our data. Variant chr16-2496933-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 195135.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-2496933-C-T is described in Lovd as [Likely_benign].

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00194 (295/152356) while in subpopulation AFR AF= 0.00587 (244/41572). AF 95% confidence interval is 0.00526. There are 1 homozygotes in gnomad4. There are 130 alleles in male gnomad4 subpopulation. Median coverage is 33. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 2 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TBC1D24	NM_001199107.2 linkuse as main transcript	c.785C>T	p.Ser262Leu	missense_variant	2/8	ENST00000646147.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TBC1D24	ENST00000646147.1 linkuse as main transcript	c.785C>T	p.Ser262Leu	missense_variant	2/8		NM_001199107.2	A1	Q9ULP9-1

Frequencies

GnomAD3 genomes

AF:

0.00193

AC:

294

AN:

152238

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00586

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00177

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000384

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000191

Gnomad OTH

AF:

0.00335

GnomAD3 exomes

AF:

0.000657

AC:

164

AN:

249450

Hom.:

AF XY:

0.000554

AC XY:

AN XY:

135368

show subpopulations

Gnomad AFR exome

AF:

0.00588

Gnomad AMR exome

AF:

0.000579

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000445

Gnomad SAS exome

AF:

0.000359

Gnomad FIN exome

AF:

0.0000928

Gnomad NFE exome

AF:

0.000256

Gnomad OTH exome

AF:

0.000496

GnomAD4 exome

AF:

0.000478

AC:

699

AN:

1461680

Hom.:

Cov.:

AF XY:

0.000418

AC XY:

304

AN XY:

727162

show subpopulations

Gnomad4 AFR exome

AF:

0.00588

Gnomad4 AMR exome

AF:

0.000760

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000151

Gnomad4 SAS exome

AF:

0.000209

Gnomad4 FIN exome

AF:

0.0000564

Gnomad4 NFE exome

AF:

0.000361

Gnomad4 OTH exome

AF:

0.000646

GnomAD4 genome

AF:

0.00194

AC:

295

AN:

152356

Hom.:

Cov.:

AF XY:

0.00174

AC XY:

130

AN XY:

74506

show subpopulations

Gnomad4 AFR

AF:

0.00587

Gnomad4 AMR

AF:

0.00176

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000385

Gnomad4 SAS

AF:

0.000414

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000191

Gnomad4 OTH

AF:

0.00331

Alfa

AF:

0.000482

Hom.:

Bravo

AF:

0.00231

TwinsUK

AF:

0.000539

AC:

ALSPAC

AF:

0.000519

AC:

ESP6500AA

AF:

0.00627

AC:

ESP6500EA

AF:

0.000587

AC:

ExAC

AF:

0.000726

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000237

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:10

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:4

Likely benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Jul 27, 2018	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	May 10, 2021	This variant is associated with the following publications: (PMID: 24291220) -
Likely benign, criteria provided, single submitter	clinical testing	CeGaT Center for Human Genetics Tuebingen	Apr 01, 2024	TBC1D24: BP4, BS2 -
Likely benign, criteria provided, single submitter	clinical testing	Center for Pediatric Genomic Medicine, Children's Mercy Hospital and Clinics	Jan 13, 2017	- -

not specified

Benign:3

Likely benign, criteria provided, single submitter	clinical testing	Al Jalila Children’s Genomics Center, Al Jalila Childrens Speciality Hospital	Dec 16, 2020	- -
Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Nov 24, 2014	Ser262Leu in exon 2 of TBC1D24: This variant is not expected to have clinical si gnificance because it has been identified in 0.6% (27/4304) of African American chromosomes from a broad population by the NHLBI Exome Sequencing Project (http: //evs.gs.washington.edu/EVS). -
Likely benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Aug 17, 2016	- -

Inborn genetic diseases

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

May 01, 2018

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

TBC1D24-related disorder

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Mar 30, 2020

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

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

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Invitae

Jan 24, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.10

BayesDel_addAF

Benign

-0.43

BayesDel_noAF

Benign

-0.39

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.017

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

Eigen

Benign

0.15

Eigen_PC

Benign

0.15

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.90

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

M_CAP

Benign

0.041

MetaRNN

Benign

0.0070

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

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.2

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

MutationTaster

Benign

1.0

D;D;D

PrimateAI

Benign

0.48

PROVEAN

Benign

-1.6

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

REVEL

Benign

0.17

Sift

Benign

0.19

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

Sift4G

Benign

0.15

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

Polyphen

0.93

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

Vest4

0.15

MVP

0.52

MPC

0.30, 0.45

ClinPred

0.017

GERP RS

5.2

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.13

gMVP

0.50

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