Genetic Variant NM_032704.5:c.649C>A (chr12-49272526-C-A) – ACMG Classification: Likely_benign (-4 pts)

Variant summary

Our verdict is Likely benign. Variant got -4 ACMG points: 0P and 4B. BS2

The NM_032704.5(TUBA1C):c.649C>A(p.Leu217Ile) variant causes a missense change. The variant allele was found at a frequency of 0.00000823 in 1,457,618 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 30)

Exomes 𝑓: 0.0000082 ( 0 hom. )

Consequence

TUBA1C
NM_032704.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.81

Variant links:

Genes affected

TUBA1C (HGNC:20768): (tubulin alpha 1c) Predicted to enable GTP binding activity. Predicted to be a structural constituent of cytoskeleton. Predicted to be involved in microtubule cytoskeleton organization and mitotic cell cycle. Located in microtubule cytoskeleton and nucleus. [provided by Alliance of Genome Resources, Apr 2022]

TUBA1C links:

ENSG00000258232 (HGNC:):

ENSG00000258232 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -4 ACMG points.

BS2

High AC in GnomAdExome4 at 12 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TUBA1C	NM_032704.5 link	c.649C>A	p.Leu217Ile	missense_variant	Exon 4 of 4	ENST00000301072.11	NP_116093.1	Q9BQE3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TUBA1C	ENST00000301072.11 link	c.649C>A	p.Leu217Ile	missense_variant	Exon 4 of 4	1	NM_032704.5	ENSP00000301072.7		Q9BQE3

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000812

AC:

AN:

246210

Hom.:

AF XY:

0.0000149

AC XY:

AN XY:

134018

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000111

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000823

AC:

AN:

1457618

Hom.:

Cov.:

AF XY:

0.00000690

AC XY:

AN XY:

724550

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000303

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

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

Jun 19, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.649C>A (p.L217I) alteration is located in exon 4 (coding exon 4) of the TUBA1C gene. This alteration results from a C to A substitution at nucleotide position 649, causing the leucine (L) at amino acid position 217 to be replaced by an isoleucine (I). 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

Pathogenic

0.76

BayesDel_addAF

Uncertain

0.092

BayesDel_noAF

Benign

-0.11

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.13

T;T

Eigen

Pathogenic

0.70

Eigen_PC

Uncertain

0.66

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.95

D;D

M_CAP

Uncertain

0.10

MetaRNN

Uncertain

0.57

D;D

MetaSVM

Uncertain

0.63

MutationAssessor

Pathogenic

3.9

.;H

PrimateAI

Uncertain

0.73

PROVEAN

Benign

-1.4

N;N

REVEL

Uncertain

0.63

Sift

Uncertain

0.0030

D;D

Sift4G

Uncertain

0.0060

D;D

Polyphen

0.051

B;P

Vest4

0.63

MutPred

0.73

Gain of catalytic residue at R291 (P = 0.0156);.;

MVP

0.77

MPC

2.0

ClinPred

0.97

GERP RS

4.6

Varity_R

0.35

gMVP

0.83

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