Variant 22-18111181-A-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Benign. Variant got -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_018943.3(TUBA8):c.3+313A>C variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00224 in 541,900 control chromosomes in the GnomAD database, including 17 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0060 ( 11 hom., cov: 32)

Exomes 𝑓: 0.00077 ( 6 hom. )

Consequence

TUBA8
NM_018943.3 intron

Scores

Clinical Significance

Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -2.78

Variant links:

Genes affected

TUBA8 (HGNC:12410): (tubulin alpha 8) This gene encodes a member of the alpha tubulin protein family. Alpha tubulins are one of two core protein families (alpha and beta tubulins) that heterodimerize and assemble to form microtubules. Mutations in this gene are associated with polymicrogyria and optic nerve hypoplasia. Alternate splicing results in multiple transcript variants. [provided by RefSeq, Jul 2010]

TUBA8 links:

(HGNC:):

links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -20 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.91).

BP6

Variant 22-18111181-A-C is Benign according to our data. Variant chr22-18111181-A-C is described in ClinVar as [Likely_benign]. Clinvar id is 1195421.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.00599 (912/152196) while in subpopulation AFR AF= 0.0204 (848/41534). AF 95% confidence interval is 0.0193. There are 11 homozygotes in gnomad4. There are 458 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAd4 at 11 AD,AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TUBA8	NM_018943.3 linkuse as main transcript	c.3+313A>C		intron_variant		ENST00000330423.8	NP_061816.1
TUBA8	NM_001193414.2 linkuse as main transcript	c.-196+342A>C		intron_variant			NP_001180343.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TUBA8	ENST00000330423.8 linkuse as main transcript	c.3+313A>C		intron_variant		1	NM_018943.3	ENSP00000333326	P1	Q9NY65-1
	ENST00000623543.1 linkuse as main transcript	n.19974T>G		non_coding_transcript_exon_variant	1/1

Frequencies

GnomAD3 genomes

AF:

0.00598

AC:

910

AN:

152078

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0204

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00275

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00863

GnomAD4 exome

AF:

0.000770

AC:

300

AN:

389704

Hom.:

Cov.:

AF XY:

0.000690

AC XY:

141

AN XY:

204312

show subpopulations

Gnomad4 AFR exome

AF:

0.0211

Gnomad4 AMR exome

AF:

0.00152

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000127

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000298

Gnomad4 OTH exome

AF:

0.00201

GnomAD4 genome

AF:

0.00599

AC:

912

AN:

152196

Hom.:

Cov.:

AF XY:

0.00616

AC XY:

458

AN XY:

74410

show subpopulations

Gnomad4 AFR

AF:

0.0204

Gnomad4 AMR

AF:

0.00275

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000415

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00854

Alfa

AF:

0.00829

Hom.:

Bravo

AF:

0.00736

Asia WGS

AF:

0.000577

AC:

AN:

3478

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Likely benign, criteria provided, single submitter	not provided	Breakthrough Genomics, Breakthrough Genomics	-	- -
Likely benign, criteria provided, single submitter	clinical testing	GeneDx	Aug 17, 2018	- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.91

CADD

Benign

0.16

DANN

Benign

0.32

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