13-75292197-T-C

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_StrongBP6_Moderate

The NM_014832.5(TBC1D4):c.3391A>G(p.Ile1131Val) variant causes a missense change. The variant allele was found at a frequency of 0.000328 in 1,613,584 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.00026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00034 ( 3 hom. )

Consequence

TBC1D4
NM_014832.5 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 4.83

Variant links:

Genes affected

TBC1D4 (HGNC:19165): (TBC1 domain family member 4) This gene is a member of the Tre-2/BUB2/CDC16 domain family. The protein encoded by this gene is a Rab-GTPase-activating protein, and contains two phopshotyrosine-binding domains (PTB1 and PTB2), a calmodulin-binding domain (CBD), a Rab-GTPase domain, and multiple AKT phosphomotifs. This protein is thought to play an important role in glucose homeostasis by regulating the insulin-dependent trafficking of the glucose transporter 4 (GLUT4), important for removing glucose from the bloodstream into skeletal muscle and fat tissues. Reduced expression of this gene results in an increase in GLUT4 levels at the plasma membrane, suggesting that this protein is important in intracellular retention of GLUT4 under basal conditions. When exposed to insulin, this protein is phosphorylated, dissociates from GLUT4 vesicles, resulting in increased GLUT4 at the cell surface, and enhanced glucose transport. Phosphorylation of this protein by AKT is required for proper translocation of GLUT4 to the cell surface. Individuals homozygous for a mutation in this gene are at higher risk for type 2 diabetes and have higher levels of circulating glucose and insulin levels after glucose ingestion. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Aug 2015]

TBC1D4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.008725405).

BP6

Variant 13-75292197-T-C is Benign according to our data. Variant chr13-75292197-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 3057756.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TBC1D4	NM_014832.5 linkuse as main transcript	c.3391A>G	p.Ile1131Val	missense_variant	19/21	ENST00000377636.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TBC1D4	ENST00000377636.8 linkuse as main transcript	c.3391A>G	p.Ile1131Val	missense_variant	19/21	2	NM_014832.5	A1	O60343-1
TBC1D4	ENST00000431480.6 linkuse as main transcript	c.3367A>G	p.Ile1123Val	missense_variant	18/20	1		P3	O60343-3
TBC1D4	ENST00000377625.6 linkuse as main transcript	c.3202A>G	p.Ile1068Val	missense_variant	17/19	1		A1	O60343-2
TBC1D4	ENST00000648194.1 linkuse as main transcript	c.2659A>G	p.Ile887Val	missense_variant	18/20

Frequencies

GnomAD3 genomes

AF:

0.000263

AC:

AN:

152210

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:

0.00827

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000639

AC:

159

AN:

248994

Hom.:

AF XY:

0.000837

AC XY:

113

AN XY:

135084

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000871

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00507

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000166

GnomAD4 exome

AF:

0.000335

AC:

490

AN:

1461256

Hom.:

Cov.:

AF XY:

0.000455

AC XY:

331

AN XY:

726930

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000671

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00524

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

9.00e-7

Gnomad4 OTH exome

AF:

0.000530

GnomAD4 genome

AF:

0.000263

AC:

AN:

152328

Hom.:

Cov.:

AF XY:

0.000430

AC XY:

AN XY:

74494

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00827

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000415

Hom.:

Bravo

AF:

0.0000680

ExAC

AF:

0.000820

AC:

Asia WGS

AF:

0.00520

AC:

AN:

3476

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

TBC1D4-related disorder

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

PreventionGenetics, part of Exact Sciences

Sep 25, 2020

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.093

BayesDel_addAF

Benign

-0.40

BayesDel_noAF

Benign

-0.35

Cadd

Benign

Dann

Uncertain

0.99

Eigen

Benign

-0.00026

Eigen_PC

Benign

0.12

FATHMM_MKL

Uncertain

0.97

LIST_S2

Benign

0.84

T;T;T;T

M_CAP

Benign

0.0067

MetaRNN

Benign

0.0087

T;T;T;T

MetaSVM

Benign

-1.0

MutationTaster

Benign

1.0

D;D;D;D

PrimateAI

Uncertain

0.57

Polyphen

0.0010

.;B;B;B

Vest4

0.28, 0.19, 0.18

MutPred

0.56

.;.;.;Gain of catalytic residue at M1132 (P = 0);

MVP

0.50

MPC

0.29

ClinPred

0.080

GERP RS

4.3

Varity_R

0.12

gMVP

0.21

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