Variant chr6-167340121-T-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The ENST00000239587.10(TTLL2):c.221T>C(p.Met74Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000501 in 1,578,186 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. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000053 ( 0 hom. )

Consequence

TTLL2
ENST00000239587.10 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.537

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.12676358).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TTLL2	NM_031949.5 linkuse as main transcript	c.221T>C	p.Met74Thr	missense_variant	3/3	ENST00000239587.10	NP_114155.4	Q9BWV7
TTLL2	NM_001410948.1 linkuse as main transcript	c.2T>C	p.Met1?	start_lost	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.221T>C	p.Met74Thr	missense_variant	3/3	1	NM_031949.5	ENSP00000239587.5	Q9BWV7
TTLL2	ENST00000515138.1 linkuse as main transcript	n.221T>C		non_coding_transcript_exon_variant	3/6	1		ENSP00000424130.1	Q9BWV7
TTLL2	ENST00000649884.1 linkuse as main transcript	c.2T>C	p.Met1?	start_lost	2/2			ENSP00000497040.1	A0A3B3IRU1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152186

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000136

AC:

AN:

219786

Hom.:

AF XY:

0.0000169

AC XY:

AN XY:

118114

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:

0.0000294

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000526

AC:

AN:

1426000

Hom.:

Cov.:

AF XY:

0.0000580

AC XY:

AN XY:

706576

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:

0.0000638

Gnomad4 OTH exome

AF:

0.0000851

GnomAD4 genome

AF:

0.0000263

AC:

AN:

152186

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74362

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

ExAC

AF:

0.0000165

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

May 16, 2023

The c.221T>C (p.M74T) alteration is located in exon 3 (coding exon 3) of the TTLL2 gene. This alteration results from a T to C substitution at nucleotide position 221, causing the methionine (M) at amino acid position 74 to be replaced by a threonine (T). 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

0.14

BayesDel_addAF

Benign

-0.32

BayesDel_noAF

Benign

-0.67

CADD

Benign

0.019

DANN

Benign

0.50

DEOGEN2

Benign

0.0057

.;T

Eigen

Benign

-1.4

Eigen_PC

Benign

-1.6

FATHMM_MKL

Benign

0.015

LIST_S2

Uncertain

0.90

D;.

M_CAP

Benign

0.0013

MetaRNN

Benign

0.13

T;T

MetaSVM

Benign

-0.91

MutationAssessor

Benign

0.34

.;N

MutationTaster

Benign

1.0

PrimateAI

Benign

0.43

PROVEAN

Benign

-2.0

.;N

REVEL

Benign

0.040

Sift

Uncertain

0.0060

.;D

Sift4G

Benign

0.083

.;T

Polyphen

0.48

.;P

Vest4

0.12

MutPred

0.24

.;Gain of phosphorylation at M74 (P = 0.0131);

MVP

0.014

MPC

0.14

ClinPred

0.074

GERP RS

-5.8

Varity_R

0.19

gMVP

0.15

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