Genetic Variant NM_018317.4:c.973C>T (chr4-26717951-C-T) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_018317.4(TBC1D19):c.973C>T(p.Arg325Trp) variant causes a missense change. The variant allele was found at a frequency of 0.0000205 in 1,610,892 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 Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000022 ( 0 hom. )

Consequence

TBC1D19
NM_018317.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 4.16

Publications

1 publications found

Variant links:

Genes affected

TBC1D19 (HGNC:25624): (TBC1 domain family member 19) Predicted to enable GTPase activator activity. Predicted to be involved in regulation of catalytic activity. [provided by Alliance of Genome Resources, Apr 2022]

TBC1D19 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.863

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TBC1D19	NM_018317.4 link	c.973C>T	p.Arg325Trp	missense_variant	Exon 14 of 21	ENST00000264866.9	NP_060787.2	Q8N5T2-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TBC1D19	ENST00000264866.9 link	c.973C>T	p.Arg325Trp	missense_variant	Exon 14 of 21	1	NM_018317.4	ENSP00000264866.4	Q8N5T2-1
TBC1D19	ENST00000511789.5 link	c.778C>T	p.Arg260Trp	missense_variant	Exon 11 of 18	1		ENSP00000425569.1	Q8N5T2-2
TBC1D19	ENST00000502873.5 link	n.1083C>T		non_coding_transcript_exon_variant	Exon 14 of 20	1

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151824

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000160

AC:

AN:

250456

AF XY:

0.00000739

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000583

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000545

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000882

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000219

AC:

AN:

1459068

Hom.:

Cov.:

AF XY:

0.0000220

AC XY:

AN XY:

725818

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33362

American (AMR)

AF:

0.0000449

AC:

AN:

44544

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26018

East Asian (EAS)

AF:

0.0000757

AC:

AN:

39634

South Asian (SAS)

AF:

0.00

AC:

AN:

85956

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53334

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5596

European-Non Finnish (NFE)

AF:

0.0000234

AC:

AN:

1110382

Other (OTH)

AF:

0.0000166

AC:

AN:

60242

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.448

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.00000659

AC:

AN:

151824

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74134

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41342

American (AMR)

AF:

0.00

AC:

AN:

15204

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5180

South Asian (SAS)

AF:

0.00

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10558

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.0000147

AC:

AN:

67928

Other (OTH)

AF:

0.00

AC:

AN:

2086

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000151

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 26, 2025

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.973C>T (p.R325W) alteration is located in exon 14 (coding exon 14) of the TBC1D19 gene. This alteration results from a C to T substitution at nucleotide position 973, causing the arginine (R) at amino acid position 325 to be replaced by a tryptophan (W). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.99

BayesDel_addAF

Uncertain

0.062

BayesDel_noAF

Uncertain

0.030

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Uncertain

0.57

D;.

Eigen

Uncertain

0.61

Eigen_PC

Uncertain

0.52

FATHMM_MKL

Uncertain

0.84

LIST_S2

Pathogenic

0.99

D;D

M_CAP

Uncertain

0.092

MetaRNN

Pathogenic

0.86

D;D

MetaSVM

Uncertain

-0.18

MutationAssessor

Uncertain

2.7

M;.

PhyloP100

4.2

PrimateAI

Uncertain

0.79

PROVEAN

Pathogenic

-7.7

D;D

REVEL

Uncertain

0.60

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

D;.

Vest4

0.95

MutPred

0.59

Gain of helix (P = 0.0696);.;

MVP

0.77

MPC

1.0

ClinPred

1.0

GERP RS

4.0

Varity_R

0.88

gMVP

0.89

Mutation Taster

=39/61

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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NM_018317.4:c.973C>T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over