rs189089167

Variant summary

Our verdict is Benign. Variant got -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_001199107.2(TBC1D24):c.1509C>T(p.Ser503=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00305 in 1,574,478 control chromosomes in the GnomAD database, including 59 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.010 ( 25 hom., cov: 33)

Exomes 𝑓: 0.0023 ( 34 hom. )

Consequence

TBC1D24
NM_001199107.2 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:11

Conservation

PhyloP100: -4.17

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 -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.74).

BP6

Variant 16-2500474-C-T is Benign according to our data. Variant chr16-2500474-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 130538.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr16-2500474-C-T is described in Lovd as [Likely_benign].

BP7

Synonymous conserved (PhyloP=-4.17 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.0105 (1592/152302) while in subpopulation AFR AF= 0.0304 (1264/41562). AF 95% confidence interval is 0.029. There are 25 homozygotes in gnomad4. There are 753 alleles in male gnomad4 subpopulation. This position pass quality control queck.

BS2

High Homozygotes in GnomAd at 25 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TBC1D24	NM_001199107.2 linkuse as main transcript	c.1509C>T	p.Ser503=	synonymous_variant	7/8	ENST00000646147.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TBC1D24	ENST00000646147.1 linkuse as main transcript	c.1509C>T	p.Ser503=	synonymous_variant	7/8		NM_001199107.2	A1	Q9ULP9-1

Frequencies

GnomAD3 genomes

AF:

0.0104

AC:

1580

AN:

152184

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0302

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0109

Gnomad ASJ

AF:

0.0141

Gnomad EAS

AF:

0.000192

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.0222

Gnomad NFE

AF:

0.00128

Gnomad OTH

AF:

0.00765

GnomAD3 exomes

AF:

0.00421

AC:

727

AN:

172564

Hom.:

AF XY:

0.00351

AC XY:

329

AN XY:

93862

show subpopulations

Gnomad AFR exome

AF:

0.0328

Gnomad AMR exome

AF:

0.00683

Gnomad ASJ exome

AF:

0.0120

Gnomad EAS exome

AF:

0.000227

Gnomad SAS exome

AF:

0.000648

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00124

Gnomad OTH exome

AF:

0.00501

GnomAD4 exome

AF:

0.00226

AC:

3214

AN:

1422176

Hom.:

Cov.:

AF XY:

0.00212

AC XY:

1490

AN XY:

704332

show subpopulations

Gnomad4 AFR exome

AF:

0.0333

Gnomad4 AMR exome

AF:

0.00656

Gnomad4 ASJ exome

AF:

0.0113

Gnomad4 EAS exome

AF:

0.000134

Gnomad4 SAS exome

AF:

0.000650

Gnomad4 FIN exome

AF:

0.0000205

Gnomad4 NFE exome

AF:

0.00103

Gnomad4 OTH exome

AF:

0.00608

GnomAD4 genome

AF:

0.0105

AC:

1592

AN:

152302

Hom.:

Cov.:

AF XY:

0.0101

AC XY:

753

AN XY:

74462

show subpopulations

Gnomad4 AFR

AF:

0.0304

Gnomad4 AMR

AF:

0.0108

Gnomad4 ASJ

AF:

0.0141

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00129

Gnomad4 OTH

AF:

0.00757

Alfa

AF:

0.00513

Hom.:

Bravo

AF:

0.0121

Asia WGS

AF:

0.00318

AC:

AN:

3478

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:11

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Benign:4

Likely benign, no assertion criteria provided	clinical testing	Genetic Services Laboratory, University of Chicago	-	Likely benign based on allele frequency in 1000 Genomes Project or ESP global frequency and its presence in a patient with a rare or unrelated disease phenotype. NOT Sanger confirmed. -
Benign, criteria provided, single submitter	clinical testing	GeneDx	Dec 06, 2013	This variant is considered likely benign or benign based on one or more of the following criteria: it is a conservative change, it occurs at a poorly conserved position in the protein, it is predicted to be benign by multiple in silico algorithms, and/or has population frequency not consistent with disease. -
Benign, criteria provided, single submitter	clinical testing	Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine	Jan 13, 2015	p.Ser503Ser in exon 7 of TBC1D24: This variant is not expected to have clinical significance because it does not alter an amino acid residue and is not located within the splice consensus sequence. It has been identified in 2.7% (106/3960) of African American chromosomes from a broad population by the NHLBI Exome Seque ncing Project (http://evs.gs.washington.edu/EVS; dbSNP rs189089167). -
Benign, criteria provided, single submitter	clinical testing	Eurofins Ntd Llc (ga)	Apr 21, 2015	- -

not provided

Benign:3

Benign, criteria provided, single submitter	clinical testing	Athena Diagnostics	Nov 20, 2018	- -
Likely benign, no assertion criteria provided	clinical testing	Genome Diagnostics Laboratory, University Medical Center Utrecht	-	- -
Likely benign, no assertion criteria provided	clinical testing	Clinical Genetics DNA and cytogenetics Diagnostics Lab, Erasmus MC, Erasmus Medical Center	-	- -

DOORS syndrome;C0917800:Familial infantile myoclonic epilepsy;C1842531:Rolandic epilepsy-paroxysmal exercise-induced dystonia-writer's cramp syndrome;C2829265:Autosomal recessive nonsyndromic hearing loss 86;C3809173:Developmental and epileptic encephalopathy, 16;C3892048:Autosomal dominant nonsyndromic hearing loss 65

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Apr 08, 2022

- -

Familial infantile myoclonic epilepsy

Benign:1

Benign, criteria provided, single submitter

clinical testing

Illumina Laboratory Services, Illumina

Jan 12, 2018

This variant was observed in the ICSL laboratory as part of a predisposition screen in an ostensibly healthy population. It had not been previously curated by ICSL or reported in the Human Gene Mutation Database (HGMD: prior to June 1st, 2018), and was therefore a candidate for classification through an automated scoring system. Utilizing variant allele frequency, disease prevalence and penetrance estimates, and inheritance mode, an automated score was calculated to assess if this variant is too frequent to cause the disease. Based on the score and internal cut-off values, a variant classified as benign is not then subjected to further curation. The score for this variant resulted in a classification of benign for this disease. -

Inborn genetic diseases

Benign:1

Benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 08, 2016

This alteration is classified as 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. -

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

Benign, criteria provided, single submitter

clinical testing

Invitae

Feb 01, 2024

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.74

Cadd

Benign

0.41

Dann

Benign

0.65

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