10-47214-G-T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PP2 PP3_Moderate PP5

The NM_177987.3(TUBB8):c.1178C>A(p.Ala393Asp) variant causes a missense change. 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 Likely pathogenic (no stars).

• Frequency: Genomes: not found (cov: 26)
• Consequence: TUBB8 NM_177987.3 missense
• Clinical Significance: Likely pathogenic no assertion criteria provided P:1
• Conservation: PhyloP100: 6.94

Genes affected

TUBB8 (HGNC:20773): (tubulin beta 8 class VIII) The protein encoded by this gene represents the primary beta-tubulin subunit of oocytes and the early embryo. Defects in this gene, which is primate-specific, are a cause of oocyte maturation defect 2 and infertility. [provided by RefSeq, Mar 2016]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant where missense usually causes diseases, TUBB8
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.864
• PP5: Variant 10-47214-G-T is Pathogenic according to our data. Variant chr10-47214-G-T is described in ClinVar as [Likely_pathogenic]. Clinvar id is 977662.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TUBB8	NM_177987.3	c.1178C>A	p.Ala393Asp	missense_variant	4/4	ENST00000568584.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TUBB8	ENST00000568584.6	c.1178C>A	p.Ala393Asp	missense_variant	4/4	1	NM_177987.3	P1
TUBB8	ENST00000564130.2	c.1076C>A	p.Ala359Asp	missense_variant	4/4	5
TUBB8	ENST00000568866.5	c.1067C>A	p.Ala356Asp	missense_variant	3/3	5
TUBB8	ENST00000561967.1	c.*841C>A		3_prime_UTR_variant	4/4	5

Frequencies

GnomAD3 genomes Cov.: 26

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 26

ClinVar

Significance: Likely pathogenic

Submissions summary: Pathogenic:1

Revision: no assertion criteria provided

Submissions by phenotype

Oocyte maturation defect 2 Pathogenic:1

Likely pathogenic, no assertion criteria provided

case-control

Center for Reproductive Medicine, Shandong Provincial Hospital Affiliated to Shandong University

Aug 31, 2020

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.99
BayesDel_addAF	Pathogenic	0.40	D
BayesDel_noAF	Pathogenic	0.34
Cadd	Benign	18
Dann	Benign	0.97
Eigen	Uncertain	0.40
Eigen_PC	Benign	0.048
FATHMM_MKL	Benign	0.66	D
LIST_S2	Uncertain	0.97	D;D;D
M_CAP	Uncertain	0.11	D
MetaRNN	Pathogenic	0.86	D;D;D
MetaSVM	Uncertain	0.78	D
MutationTaster	Benign	0.97	D;D;D;D;D
PrimateAI	Uncertain	0.72	T
PROVEAN	Uncertain	-3.4	D;D;D
Sift	Pathogenic	0.0	D;.;.
Sift4G	Pathogenic	0.0	D;D;D
Polyphen		1.0	.;.;D
Vest4		0.69
MutPred		0.71		.;.;Loss of MoRF binding (P = 0.0374);
MVP		0.87
ClinPred		1.0	D
Varity_R		0.80
gMVP		0.96

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: rs1834349710; hg19: chr10-93154;