Variant chr6-167340433-T-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_031949.5(TTLL2):c.533T>C(p.Ile178Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,894 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 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: 6.8e-7 ( 0 hom. )

Consequence

TTLL2
NM_031949.5 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.926

Variant links:

Genes affected

TTLL2 (HGNC:21211): (tubulin tyrosine ligase like 2) Predicted to enable tubulin binding activity and tubulin-glutamic acid ligase activity. Predicted to be involved in microtubule cytoskeleton organization and protein polyglutamylation. Predicted to be active in cilium. [provided by Alliance of Genome Resources, Apr 2022]

TTLL2 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.29114634).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TTLL2	NM_031949.5 linkuse as main transcript	c.533T>C	p.Ile178Thr	missense_variant	3/3	ENST00000239587.10	NP_114155.4	Q9BWV7
TTLL2	NM_001410948.1 linkuse as main transcript	c.314T>C	p.Ile105Thr	missense_variant	2/2		NP_001397877.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	UniProt
TTLL2	ENST00000239587.10 linkuse as main transcript	c.533T>C	p.Ile178Thr	missense_variant	3/3	1	NM_031949.5	ENSP00000239587.5	Q9BWV7
TTLL2	ENST00000515138.1 linkuse as main transcript	n.533T>C		non_coding_transcript_exon_variant	3/6	1		ENSP00000424130.1	Q9BWV7
TTLL2	ENST00000649884.1 linkuse as main transcript	c.314T>C	p.Ile105Thr	missense_variant	2/2			ENSP00000497040.1	A0A3B3IRU1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461894

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727248

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:

8.99e-7

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 09, 2024

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.094

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.77

CADD

Benign

1.2

DANN

Benign

0.30

DEOGEN2

Benign

0.0036

.;T

Eigen

Benign

-1.2

Eigen_PC

Benign

-1.3

FATHMM_MKL

Benign

0.091

LIST_S2

Benign

0.53

T;.

M_CAP

Benign

0.00084

MetaRNN

Benign

0.29

T;T

MetaSVM

Benign

-0.92

MutationAssessor

Benign

0.26

.;N

PrimateAI

Benign

0.33

PROVEAN

Benign

1.6

.;N

REVEL

Benign

0.084

Sift

Benign

0.46

.;T

Sift4G

Benign

0.57

.;T

Polyphen

0.0010

.;B

Vest4

0.079

MutPred

0.73

.;Loss of stability (P = 0.019);

MVP

0.014

MPC

0.15

ClinPred

0.11

GERP RS

-3.0

Varity_R

0.031

gMVP

0.35

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