Variant chr6-43253565-C-T details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_ModerateBS2

The NM_032538.3(TTBK1):c.331-3C>T variant causes a splice region, splice polypyrimidine tract, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000122 in 1,603,942 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★★).

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 31)

Exomes 𝑓: 0.00012 ( 1 hom. )

Consequence

TTBK1
NM_032538.3 splice_region, splice_polypyrimidine_tract, intron

Scores

Splicing: ADA: 0.006383

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:2

Conservation

PhyloP100: 1.36

Variant links:

Genes affected

TTBK1 (HGNC:19140): (tau tubulin kinase 1) Summary:This gene belongs to the casein kinase 1 superfamily. The encoded protein is a neuron-specific, serine/threonine and tyrosine kinase, which regulates phosphorylation of tau, a protein that associates with microtubule assemblies and stabilizes them. Genetic variants in this gene are associated with Alzheimer's disease. [provided by RefSeq, Jul 2016]

TTBK1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -6 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.45).

BS2

High AC in GnomAd4 at 16 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TTBK1	NM_032538.3 linkuse as main transcript	c.331-3C>T		splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant		ENST00000259750.9

Ensembl

Gene	Transcript	HGVSc	Effect	TSL	MANE	Appris	UniProt
TTBK1	ENST00000259750.9 linkuse as main transcript	c.331-3C>T	splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant	1	NM_032538.3	P3	Q5TCY1-1
TTBK1	ENST00000703836.1 linkuse as main transcript	c.331-3C>T	splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant			A2
TTBK1	ENST00000304139.6 linkuse as main transcript	n.340-3C>T	splice_region_variant, splice_polypyrimidine_tract_variant, intron_variant, non_coding_transcript_variant	5

Frequencies

GnomAD3 genomes

AF:

0.000105

AC:

AN:

152114

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000217

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.0000588

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000132

AC:

AN:

243218

Hom.:

AF XY:

0.000145

AC XY:

AN XY:

131468

show subpopulations

Gnomad AFR exome

AF:

0.000187

Gnomad AMR exome

AF:

0.0000883

Gnomad ASJ exome

AF:

0.000631

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000339

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000118

Gnomad OTH exome

AF:

0.00101

GnomAD4 exome

AF:

0.000123

AC:

179

AN:

1451710

Hom.:

Cov.:

AF XY:

0.000139

AC XY:

100

AN XY:

721214

show subpopulations

Gnomad4 AFR exome

AF:

0.000510

Gnomad4 AMR exome

AF:

0.000136

Gnomad4 ASJ exome

AF:

0.000781

Gnomad4 EAS exome

AF:

0.0000253

Gnomad4 SAS exome

AF:

0.0000235

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000777

Gnomad4 OTH exome

AF:

0.000383

GnomAD4 genome

AF:

0.000105

AC:

AN:

152232

Hom.:

Cov.:

AF XY:

0.000107

AC XY:

AN XY:

74422

show subpopulations

Gnomad4 AFR

AF:

0.000217

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000588

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.000181

Hom.:

Bravo

AF:

0.000170

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genomic Diagnostic Laboratory, Division of Genomic Diagnostics, Children's Hospital of Philadelphia

May 12, 2015

- -

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

not provided

Breakthrough Genomics, Breakthrough Genomics

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.45

CADD

Benign

9.8

DANN

Benign

0.69

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.0064

dbscSNV1_RF

Benign

0.19

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