rs797046076

Positions:

• chr16-89933491-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 3P and 2B. PM2 PP2 BP4_Moderate

The NM_006086.4(TUBB3):​c.190A>G​(p.Ile64Val) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: TUBB3 NM_006086.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.21

Genes affected

TUBB3 (HGNC:20772): (tubulin beta 3 class III) This gene encodes a class III member of the beta tubulin protein family. Beta tubulins are one of two core protein families (alpha and beta tubulins) that heterodimerize and assemble to form microtubules. This protein is primarily expressed in neurons and may be involved in neurogenesis and axon guidance and maintenance. Mutations in this gene are the cause of congenital fibrosis of the extraocular muscles type 3. Alternate splicing results in multiple transcript variants. A pseudogene of this gene is found on chromosome 6. [provided by RefSeq, Oct 2010]

ENSG00000198211 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), TUBB3. . Gene score misZ 4.5786 (greater than the threshold 3.09). Trascript score misZ 5.665 (greater than threshold 3.09). GenCC has associacion of gene with tubulinopathy-associated dysgyria, complex cortical dysplasia with other brain malformations 1, congenital fibrosis of extraocular muscles, fibrosis of extraocular muscles, congenital, 3A, with or without extraocular involvement.
• BP4: Computational evidence support a benign effect (MetaRNN=0.10651165).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TUBB3	NM_006086.4	c.190A>G	p.Ile64Val	missense_variant	3/4	ENST00000315491.12	NP_006077.2
TUBB3	NM_001197181.2	c.-27A>G		5_prime_UTR_variant	3/4		NP_001184110.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TUBB3	ENST00000315491.12	c.190A>G	p.Ile64Val	missense_variant	3/4	1	NM_006086.4	ENSP00000320295.7
ENSG00000198211	ENST00000556922.1	c.1231A>G	p.Ile411Val	missense_variant	4/5	2		ENSP00000451560.1

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

Genetic Services Laboratory, University of Chicago

Jan 13, 2015

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.066
BayesDel_addAF	Benign	-0.092	T
BayesDel_noAF	Benign	-0.37
CADD	Benign	21
DANN	Benign	0.94
DEOGEN2	Benign	0.015	.;T;T;T;.;T
Eigen	Benign	-0.32
Eigen_PC	Benign	-0.075
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Benign	0.56	T;D;T;D;D;D
M_CAP	Benign	0.0090	T
MetaRNN	Benign	0.11	T;T;T;T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.84	.;.;N;.;.;.
PrimateAI	Pathogenic	0.81	D
PROVEAN	Benign	0.22	N;.;N;N;N;N
REVEL	Benign	0.082
Sift	Benign	0.28	T;.;.;T;T;T
Sift4G	Benign	1.0	T;T;T;T;T;T
Polyphen		0.0	.;.;B;.;.;.
Vest4		0.26
MutPred		0.23		.;Loss of stability (P = 0.1038);Loss of stability (P = 0.1038);Loss of stability (P = 0.1038);Loss of stability (P = 0.1038);Loss of stability (P = 0.1038);
MVP		0.24
MPC		1.3
ClinPred		0.52	D
GERP RS		4.6
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.23
gMVP		0.84

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

Other links and lift over

dbSNP: rs797046076; hg19: chr16-89999899;