Genetic Variant TUBD1:p.Arg253Gln (chr17-59878114-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_016261.4(TUBD1):c.758G>A(p.Arg253Gln) variant causes a missense change. The variant allele was found at a frequency of 0.00000372 in 1,613,396 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 31)

Exomes 𝑓: 0.0000034 ( 0 hom. )

Consequence

TUBD1
NM_016261.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.74

Variant links:

Genes affected

TUBD1 (HGNC:16811): (tubulin delta 1) Predicted to enable GTP binding activity. Predicted to be a structural constituent of cytoskeleton. Predicted to be involved in microtubule cytoskeleton organization; mitotic cell cycle; and positive regulation of smoothened signaling pathway. Located in cytosol and nucleoplasm. [provided by Alliance of Genome Resources, Apr 2022]

TUBD1 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TUBD1	NM_016261.4 link	c.758G>A	p.Arg253Gln	missense_variant	Exon 5 of 9	ENST00000325752.8	NP_057345.2	Q9UJT1-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TUBD1	ENST00000325752.8 link	c.758G>A	p.Arg253Gln	missense_variant	Exon 5 of 9	5	NM_016261.4	ENSP00000320797.3		Q9UJT1-1

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152168

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251226

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135788

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:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000342

AC:

AN:

1461228

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

726940

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000224

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000504

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152168

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74326

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:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.00000756

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Mar 13, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.758G>A (p.R253Q) alteration is located in exon 5 (coding exon 4) of the TUBD1 gene. This alteration results from a G to A substitution at nucleotide position 758, causing the arginine (R) at amino acid position 253 to be replaced by a glutamine (Q). 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

0.089

BayesDel_addAF

Uncertain

0.10

BayesDel_noAF

Uncertain

0.010

CADD

Uncertain

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.045

.;T;.;.;.;T;.

Eigen

Uncertain

0.66

Eigen_PC

Uncertain

0.65

FATHMM_MKL

Uncertain

0.95

LIST_S2

Benign

0.83

T;T;T;T;.;.;T

M_CAP

Benign

0.053

MetaRNN

Uncertain

0.45

T;T;T;T;T;T;T

MetaSVM

Uncertain

0.33

MutationAssessor

Uncertain

2.6

M;M;M;M;M;M;.

PrimateAI

Benign

0.41

PROVEAN

Benign

-1.6

.;N;N;N;N;.;N

REVEL

Uncertain

0.48

Sift

Uncertain

0.027

.;D;T;D;D;.;T

Sift4G

Benign

0.32

T;T;T;T;T;T;D

Polyphen

1.0, 0.78

.;D;P;.;.;D;.

Vest4

0.28

MutPred

0.50

Loss of stability (P = 0.1541);Loss of stability (P = 0.1541);Loss of stability (P = 0.1541);Loss of stability (P = 0.1541);Loss of stability (P = 0.1541);Loss of stability (P = 0.1541);.;

MVP

0.86

MPC

0.13

ClinPred

0.74

GERP RS

5.7

Varity_R

0.21

gMVP

0.51

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

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