Variant chr6-43259192-C-G 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.1171C>G(p.His391Asp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000186 in 1,455,036 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.000019 ( 0 hom. )

Consequence

TTBK1
NM_032538.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.64

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:

TTBK1 (HGNC:):

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 (MetaRNN=0.20347887).

BS2

High AC in GnomAdExome4 at 27 AD gene.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TTBK1	NM_032538.3 linkuse as main transcript	c.1171C>G	p.His391Asp	missense_variant	11/15	ENST00000259750.9	NP_115927.1	Q5TCY1-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
TTBK1	ENST00000259750.9 linkuse as main transcript	c.1171C>G	p.His391Asp	missense_variant	11/15	1	NM_032538.3	ENSP00000259750.4	Q5TCY1-1
TTBK1	ENST00000703836.1 linkuse as main transcript	c.1171C>G	p.His391Asp	missense_variant	10/13			ENSP00000515493.1	A0A994J709
TTBK1	ENST00000304139.6 linkuse as main transcript	n.1180C>G		non_coding_transcript_exon_variant	10/13	5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000125

AC:

AN:

240104

Hom.:

AF XY:

0.00000767

AC XY:

AN XY:

130300

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000187

Gnomad OTH exome

AF:

0.000171

GnomAD4 exome

AF:

0.0000186

AC:

AN:

1455036

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

723848

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000234

Gnomad4 OTH exome

AF:

0.0000167

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000246

Hom.:

Bravo

AF:

0.00000378

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Sep 26, 2024

The c.1171C>G (p.H391D) alteration is located in exon 11 (coding exon 10) of the TTBK1 gene. This alteration results from a C to G substitution at nucleotide position 1171, causing the histidine (H) at amino acid position 391 to be replaced by an aspartic acid (D). 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

Benign

0.17

BayesDel_addAF

Benign

-0.098

BayesDel_noAF

Benign

-0.36

CADD

Benign

DANN

Uncertain

0.99

DEOGEN2

Benign

0.039

T;.

Eigen

Benign

0.062

Eigen_PC

Benign

0.16

FATHMM_MKL

Uncertain

0.84

LIST_S2

Benign

0.73

T;T

M_CAP

Benign

0.013

MetaRNN

Benign

0.20

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.97

L;.

PrimateAI

Uncertain

0.57

PROVEAN

Uncertain

-2.6

D;N

REVEL

Benign

0.10

Sift

Uncertain

0.0040

D;D

Sift4G

Benign

0.077

T;T

Polyphen

0.65

P;.

Vest4

0.63

MVP

0.21

MPC

0.54

ClinPred

0.79

GERP RS

4.6

Varity_R

0.27

gMVP

0.36

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