18-12325104-C-A

Position:

• chr18-12325104-C-A

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_032525.3(TUBB6):​c.315C>A​(p.His105Gln) variant causes a missense change involving the alteration of a non-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 (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: TUBB6 NM_032525.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 0.712

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 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.911

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TUBB6	NM_032525.3	c.315C>A	p.His105Gln	missense_variant	4/4	ENST00000317702.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TUBB6	ENST00000317702.10	c.315C>A	p.His105Gln	missense_variant	4/4	1	NM_032525.3	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

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 03, 2023

The c.315C>A (p.H105Q) alteration is located in exon 4 (coding exon 4) of the TUBB6 gene. This alteration results from a C to A substitution at nucleotide position 315, causing the histidine (H) at amino acid position 105 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	Pathogenic	0.98
BayesDel_addAF	Pathogenic	0.36	D
BayesDel_noAF	Pathogenic	0.28
CADD	Uncertain	24
DANN	Benign	0.97
DEOGEN2	Benign	0.19	T;D;T;T
Eigen	Pathogenic	0.70
Eigen_PC	Uncertain	0.55
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Uncertain	0.93	D;D;D;D
M_CAP	Uncertain	0.28	D
MetaRNN	Pathogenic	0.91	D;D;D;D
MetaSVM	Uncertain	0.40	D
MutationAssessor	Pathogenic	4.5	.;H;.;.
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Pathogenic	0.86	D
PROVEAN	Pathogenic	-5.0	.;D;.;.
REVEL	Pathogenic	0.82
Sift	Pathogenic	0.0	.;D;.;.
Sift4G	Uncertain	0.0020	D;D;D;D
Polyphen		1.0	.;D;.;.
Vest4		0.89
MutPred		0.80		Gain of sheet (P = 0.1208);Gain of sheet (P = 0.1208);.;.;
MVP		0.94
MPC		2.1
ClinPred		1.0	D
GERP RS		3.1
Varity_R		0.88
gMVP		0.93

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: chr18-12325103;