Genetic Variant TBC1D28:p.Leu111Trp (chr17-18638368-A-C) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 2P and 6B. PM2BP4_StrongBP6_Moderate

The NM_001039397.3(TBC1D28):c.332T>G(p.Leu111Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000129 in 1,614,122 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/20 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00014 ( 0 hom. )

Consequence

TBC1D28
NM_001039397.3 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.0850

Variant links:

Genes affected

TBC1D28 (HGNC:26858): (TBC1 domain family member 28) Predicted to enable GTPase activator activity. Predicted to be involved in activation of GTPase activity and intracellular protein transport. [provided by Alliance of Genome Resources, Apr 2022]

TBC1D28 links:

ENSG00000262262 (HGNC:):

ENSG00000262262 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.017930776).

BP6

Variant 17-18638368-A-C is Benign according to our data. Variant chr17-18638368-A-C is described in ClinVar as [Likely_benign]. Clinvar id is 3453477.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TBC1D28	NM_001039397.3 link	c.332T>G	p.Leu111Trp	missense_variant	Exon 8 of 10	ENST00000405044.7	NP_001034486.2	Q2M2D7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
TBC1D28	ENST00000405044.7 link	c.332T>G	p.Leu111Trp	missense_variant	Exon 8 of 10	5	NM_001039397.3	ENSP00000385821.1	Q2M2D7
TBC1D28	ENST00000345096.8 link	c.332T>G	p.Leu111Trp	missense_variant	Exon 7 of 9	2		ENSP00000339973.4	Q2M2D7
ENSG00000262262	ENST00000571884.1 link	n.3T>G		non_coding_transcript_exon_variant	Exon 1 of 1	6

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152232

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.0000882

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000280

AC:

AN:

249586

Hom.:

AF XY:

0.0000295

AC XY:

AN XY:

135408

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000327

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000530

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000136

AC:

199

AN:

1461890

Hom.:

Cov.:

AF XY:

0.000143

AC XY:

104

AN XY:

727246

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000580

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000173

Gnomad4 OTH exome

AF:

0.0000331

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152232

Hom.:

Cov.:

AF XY:

0.0000672

AC XY:

AN XY:

74386

show subpopulations

Gnomad4 AFR

AF:

0.0000482

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000882

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000772

Hom.:

Bravo

AF:

0.0000642

ExAC

AF:

0.0000496

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Benign:1

Oct 08, 2024

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.028

BayesDel_addAF

Benign

-0.40

BayesDel_noAF

Benign

-0.66

CADD

Benign

2.4

DANN

Benign

0.24

DEOGEN2

Benign

0.039

T;T

Eigen

Benign

-2.4

Eigen_PC

Benign

-2.3

FATHMM_MKL

Benign

0.00025

LIST_S2

Benign

0.26

.;T

M_CAP

Benign

0.0048

MetaRNN

Benign

0.018

T;T

MetaSVM

Benign

-0.88

MutationAssessor

Benign

-2.7

N;N

PROVEAN

Benign

N;N

REVEL

Benign

0.24

Sift

Benign

1.0

T;T

Sift4G

Benign

1.0

T;T

Polyphen

0.0

B;B

Vest4

0.35

MVP

0.030

MPC

0.61

ClinPred

0.026

GERP RS

-0.37

Varity_R

0.083

gMVP

0.19

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