chr16-2497099-C-T
Variant summary
Our verdict is Benign. Variant got -10 ACMG points: 0P and 10B. BP4_StrongBP6BP7BS1
The NM_001199107.2(TBC1D24):c.951C>T(p.Thr317=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000935 in 1,604,372 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).
Frequency
Genomes: 𝑓 0.000053 ( 0 hom., cov: 33)
Exomes 𝑓: 0.000098 ( 2 hom. )
Consequence
TBC1D24
NM_001199107.2 synonymous
NM_001199107.2 synonymous
Scores
2
Clinical Significance
Conservation
PhyloP100: -6.20
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]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -10 ACMG points.
BP4
?
Computational evidence support a benign effect (BayesDel_noAF=-0.95).
BP6
?
Variant 16-2497099-C-T is Benign according to our data. Variant chr16-2497099-C-T is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 207488.We mark this variant Likely_benign, oryginal submissions are: {Uncertain_significance=1, Likely_benign=4, Benign=1}.
BP7
?
Synonymous conserved (PhyloP=-6.2 with no splicing effect.
BS1
?
Variant frequency is greater than expected in population mid. gnomad4_exome allele frequency = 0.0000978 (142/1452074) while in subpopulation MID AF= 0.0123 (71/5756). AF 95% confidence interval is 0.01. There are 2 homozygotes in gnomad4_exome. There are 70 alleles in male gnomad4_exome subpopulation. Median coverage is 31. This position pass quality control queck.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
TBC1D24 | NM_001199107.2 | c.951C>T | p.Thr317= | synonymous_variant | 2/8 | ENST00000646147.1 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
TBC1D24 | ENST00000646147.1 | c.951C>T | p.Thr317= | synonymous_variant | 2/8 | NM_001199107.2 | A1 |
Frequencies
GnomAD3 genomes ? AF: 0.0000526 AC: 8AN: 152180Hom.: 0 Cov.: 33
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GnomAD3 exomes AF: 0.0000464 AC: 11AN: 237108Hom.: 0 AF XY: 0.0000617 AC XY: 8AN XY: 129736
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GnomAD4 exome AF: 0.0000978 AC: 142AN: 1452074Hom.: 2 Cov.: 31 AF XY: 0.0000969 AC XY: 70AN XY: 722724
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ClinVar
Significance: Conflicting classifications of pathogenicity
Submissions summary: Uncertain:1Benign:5
Revision: criteria provided, conflicting classifications
LINK: link
Submissions by phenotype
not specified Benign:2
Benign, criteria provided, single submitter | clinical testing | GeneDx | Oct 14, 2014 | 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. - |
Likely benign, criteria provided, single submitter | clinical testing | Laboratory for Molecular Medicine, Mass General Brigham Personalized Medicine | Aug 10, 2017 | p.Thr317Thr in exon 2 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 13/265438 total chromosomes in different populations by the Genome Aggregation Database (gnomAD, http://gnomad.broadinstitute.org; dbSNP rs766745103). - |
Familial infantile myoclonic epilepsy Uncertain:1
Uncertain significance, 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, this variant could not be ruled out of causing disease and therefore its association with disease required further investigation. A literature search was performed for the gene, cDNA change, and amino acid change (if applicable). No publications were found based on this search. This variant was therefore classified as a variant of unknown significance for this disease. - |
Inborn genetic diseases Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Ambry Genetics | Nov 02, 2017 | 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. - |
not provided Benign:1
Likely benign, criteria provided, single submitter | clinical testing | CeGaT Center for Human Genetics Tuebingen | Dec 01, 2021 | - - |
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 | Oct 28, 2023 | - - |
Computational scores
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Name
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BayesDel_noAF
Benign
Cadd
Benign
Dann
Benign
RBP_binding_hub_radar
RBP_regulation_power_radar
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at