Genetic Variant NM_014346.5:c.307C>T (chr22-46793688-C-T) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 0P and 2B. BP4_Moderate

The NM_014346.5(TBC1D22A):c.307C>T(p.Arg103Cys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000446 in 1,612,830 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000040 ( 1 hom. )

Consequence

TBC1D22A
NM_014346.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.23

Publications

0 publications found

Variant links:

Genes affected

TBC1D22A (HGNC:1309): (TBC1 domain family member 22A) Enables 14-3-3 protein binding activity and protein homodimerization activity. Predicted to be involved in activation of GTPase activity and intracellular protein transport. [provided by Alliance of Genome Resources, Apr 2022]

TBC1D22A links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.1090039).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TBC1D22A	NM_014346.5 link	c.307C>T	p.Arg103Cys	missense_variant	Exon 3 of 13	ENST00000337137.9	NP_055161.1	Q8WUA7-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TBC1D22A	ENST00000337137.9 link	c.307C>T	p.Arg103Cys	missense_variant	Exon 3 of 13	1	NM_014346.5	ENSP00000336724.4		Q8WUA7-1

Frequencies

GnomAD3 genomes

AF:

0.0000920

AC:

AN:

152176

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000916

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000684

AC:

AN:

248410

AF XY:

0.0000889

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000290

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000538

Gnomad OTH exome

AF:

0.000165

GnomAD4 exome

AF:

0.0000397

AC:

AN:

1460536

Hom.:

Cov.:

AF XY:

0.0000413

AC XY:

AN XY:

726544

show subpopulations

African (AFR)

AF:

0.0000597

AC:

AN:

33474

American (AMR)

AF:

0.000425

AC:

AN:

44708

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26118

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39696

South Asian (SAS)

AF:

0.0000116

AC:

AN:

86218

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52576

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5540

European-Non Finnish (NFE)

AF:

0.0000306

AC:

AN:

1111860

Other (OTH)

AF:

0.0000166

AC:

AN:

60346

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.480

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.0000919

AC:

AN:

152294

Hom.:

Cov.:

AF XY:

0.0000940

AC XY:

AN XY:

74468

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41578

American (AMR)

AF:

0.000915

AC:

AN:

15306

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5160

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68022

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.539

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000982

ExAC

AF:

0.0000577

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Nov 12, 2024

Ambry Genetics

Significance:Uncertain significance

Review Status:criteria provided, single submitter

Collection Method:clinical testing

The c.307C>T (p.R103C) alteration is located in exon 3 (coding exon 3) of the TBC1D22A gene. This alteration results from a C to T substitution at nucleotide position 307, causing the arginine (R) at amino acid position 103 to be replaced by a cysteine (C). 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

0.13

BayesDel_addAF

Benign

-0.30

BayesDel_noAF

Benign

-0.39

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.060

T;T;T;.;.

Eigen

Benign

0.13

Eigen_PC

Benign

0.091

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.97

D;D;D;D;D

M_CAP

Benign

0.053

MetaRNN

Benign

0.11

T;T;T;T;T

MetaSVM

Benign

-0.82

MutationAssessor

Benign

1.9

.;M;.;.;.

PhyloP100

1.2

PrimateAI

Benign

0.35

PROVEAN

Benign

-2.3

.;N;D;D;D

REVEL

Benign

0.082

Sift

Uncertain

0.018

.;D;D;D;D

Sift4G

Uncertain

0.020

D;D;D;D;D

Polyphen

0.96, 0.99, 0.99

.;D;D;D;.

Vest4

0.46

MutPred

0.43

.;Loss of catalytic residue at R103 (P = 0.0104);Loss of catalytic residue at R103 (P = 0.0104);.;.;

MVP

0.22

MPC

1.2

ClinPred

0.15

GERP RS

3.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.16

gMVP

0.22

Mutation Taster

=76/24

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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_014346.5:c.307C>T

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over