chr18-12325382-A-T

Position:

• chr18-12325382-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP3

The NM_032525.3(TUBB6):​c.593A>T​(p.Glu198Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E198K) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: TUBB6 NM_032525.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.20

Genes affected

TUBB6 (HGNC:20776): (tubulin beta 6 class V) 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. [provided by Alliance of Genome Resources, Apr 2022]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.79

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TUBB6	NM_032525.3	c.593A>T	p.Glu198Val	missense_variant	4/4	ENST00000317702.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TUBB6	ENST00000317702.10	c.593A>T	p.Glu198Val	missense_variant	4/4	1	NM_032525.3	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 09, 2021

The c.593A>T (p.E198V) alteration is located in exon 4 (coding exon 4) of the TUBB6 gene. This alteration results from a A to T substitution at nucleotide position 593, causing the glutamic acid (E) at amino acid position 198 to be replaced by a valine (V). 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	Uncertain	0.54
BayesDel_addAF	Pathogenic	0.33	D
BayesDel_noAF	Pathogenic	0.23
CADD	Uncertain	25
DANN	Benign	0.97
DEOGEN2	Uncertain	0.54	D;T
Eigen	Uncertain	0.51
Eigen_PC	Uncertain	0.52
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.94	D;D
M_CAP	Benign	0.075	D
MetaRNN	Pathogenic	0.79	D;D
MetaSVM	Uncertain	-0.13	T
MutationAssessor	Uncertain	2.7	M;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.67	T
PROVEAN	Pathogenic	-5.1	D;.
REVEL	Pathogenic	0.65
Sift	Pathogenic	0.0	D;.
Sift4G	Uncertain	0.026	D;D
Polyphen		0.60	P;.
Vest4		0.81
MutPred		0.56		Loss of disorder (P = 0.1429);.;
MVP		0.83
MPC		1.4
ClinPred		0.99	D
GERP RS		5.2
Varity_R		0.74
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

No publications associated with this variant yet.

Other links and lift over

hg19: chr18-12325381;