Genetic Variant TBC1D22B:p.Ala175Pro (chr6-37282286-G-C) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_017772.4(TBC1D22B):c.523G>C(p.Ala175Pro) variant causes a missense change. The variant allele was found at a frequency of 0.0000171 in 1,461,768 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000017 ( 0 hom. )

Consequence

TBC1D22B
NM_017772.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.30

Variant links:

Genes affected

TBC1D22B (HGNC:21602): (TBC1 domain family member 22B) Enables 14-3-3 protein binding activity. Predicted to be involved in activation of GTPase activity and intracellular protein transport. [provided by Alliance of Genome Resources, Apr 2022]

TBC1D22B links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.23762003).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TBC1D22B	NM_017772.4 link	c.523G>C	p.Ala175Pro	missense_variant	Exon 4 of 13	ENST00000373491.3	NP_060242.2	Q9NU19

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TBC1D22B	ENST00000373491.3 link	c.523G>C	p.Ala175Pro	missense_variant	Exon 4 of 13	1	NM_017772.4	ENSP00000362590.3		Q9NU19

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000160

AC:

AN:

250698

Hom.:

AF XY:

0.0000148

AC XY:

AN XY:

135546

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000545

Gnomad SAS exome

AF:

0.0000654

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000882

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000171

AC:

AN:

1461768

Hom.:

Cov.:

AF XY:

0.0000151

AC XY:

AN XY:

727174

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000464

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000171

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000756

ExAC

AF:

0.0000165

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 10, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.523G>C (p.A175P) alteration is located in exon 4 (coding exon 4) of the TBC1D22B gene. This alteration results from a G to C substitution at nucleotide position 523, causing the alanine (A) at amino acid position 175 to be replaced by a proline (P). 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

0.16

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.32

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Benign

0.023

Eigen

Benign

0.10

Eigen_PC

Uncertain

0.30

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.92

M_CAP

Benign

0.0087

MetaRNN

Benign

0.24

MetaSVM

Benign

-1.1

MutationAssessor

Benign

1.1

PrimateAI

Uncertain

0.78

PROVEAN

Benign

-0.84

REVEL

Benign

0.13

Sift

Benign

0.35

Sift4G

Benign

0.19

Polyphen

0.0020

Vest4

0.55

MutPred

0.32

Gain of glycosylation at A175 (P = 0.0151);

MVP

0.67

MPC

0.81

ClinPred

0.16

GERP RS

5.8

Varity_R

0.39

gMVP

0.68

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