Genetic Variant TBC1D19:p.Arg166His (chr4-26659613-G-A) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_018317.4(TBC1D19):c.497G>A(p.Arg166His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.0000354 in 1,584,138 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R166C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000037 ( 0 hom. )

Consequence

TBC1D19
NM_018317.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.27

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:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.36704758).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TBC1D19	NM_018317.4 link	c.497G>A	p.Arg166His	missense_variant	Exon 8 of 21	ENST00000264866.9	NP_060787.2	Q8N5T2-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TBC1D19	ENST00000264866.9 link	c.497G>A	p.Arg166His	missense_variant	Exon 8 of 21	1	NM_018317.4	ENSP00000264866.4		Q8N5T2-1

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

151996

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000242

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:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000521

AC:

AN:

249384

Hom.:

AF XY:

0.0000519

AC XY:

AN XY:

134746

show subpopulations

Gnomad AFR exome

AF:

0.000124

Gnomad AMR exome

AF:

0.0000293

Gnomad ASJ exome

AF:

0.000200

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000333

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000619

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000370

AC:

AN:

1432142

Hom.:

Cov.:

AF XY:

0.0000352

AC XY:

AN XY:

710624

show subpopulations

Gnomad4 AFR exome

AF:

0.000121

Gnomad4 AMR exome

AF:

0.0000451

Gnomad4 ASJ exome

AF:

0.000119

Gnomad4 EAS exome

AF:

0.0000510

Gnomad4 SAS exome

AF:

0.0000122

Gnomad4 FIN exome

AF:

0.0000191

Gnomad4 NFE exome

AF:

0.0000339

Gnomad4 OTH exome

AF:

0.0000509

GnomAD4 genome

AF:

0.0000197

AC:

AN:

151996

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74220

show subpopulations

Gnomad4 AFR

AF:

0.0000242

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000280

Hom.:

Bravo

AF:

0.0000416

ExAC

AF:

0.0000330

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 30, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.497G>A (p.R166H) alteration is located in exon 8 (coding exon 8) of the TBC1D19 gene. This alteration results from a G to A substitution at nucleotide position 497, causing the arginine (R) at amino acid position 166 to be replaced by a histidine (H). 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

Benign

0.17

BayesDel_addAF

Benign

-0.18

BayesDel_noAF

Benign

-0.26

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.067

.;T;.;.

Eigen

Uncertain

0.66

Eigen_PC

Uncertain

0.66

FATHMM_MKL

Uncertain

0.93

LIST_S2

Pathogenic

0.98

D;D;D;D

M_CAP

Benign

0.047

MetaRNN

Benign

0.37

T;T;T;T

MetaSVM

Benign

-0.64

MutationAssessor

Uncertain

2.3

.;M;.;.

PrimateAI

Uncertain

0.69

PROVEAN

Uncertain

-2.5

D;N;D;N

REVEL

Benign

0.21

Sift

Benign

0.13

T;T;T;T

Sift4G

Benign

0.23

T;T;T;T

Polyphen

1.0

.;D;.;.

Vest4

0.72, 0.69

MutPred

0.35

.;Loss of catalytic residue at R166 (P = 0.0108);.;.;

MVP

0.65

MPC

1.0

ClinPred

0.59

GERP RS

5.3

Varity_R

0.24

gMVP

0.54

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.11

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