Variant 1-83869996-T-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_024686.6(TTLL7):c.2630A>G(p.Asn877Ser) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000609 in 1,592,850 control chromosomes in the GnomAD database, including 1 homozygotes. 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 0.000039 ( 1 hom., cov: 32)

Exomes 𝑓: 0.000063 ( 0 hom. )

Consequence

TTLL7
NM_024686.6 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -0.139

Variant links:

Genes affected

TTLL7 (HGNC:26242): (tubulin tyrosine ligase like 7) Enables alpha-tubulin binding activity; beta-tubulin binding activity; and tubulin-glutamic acid ligase activity. Involved in protein polyglutamylation. Predicted to be located in 9+0 non-motile cilium and ciliary basal body. Predicted to be active in cilium. [provided by Alliance of Genome Resources, Apr 2022]

TTLL7 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.0544419).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
TTLL7	NM_024686.6 link	c.2630A>G	p.Asn877Ser	missense_variant	21/21	ENST00000260505.13	NP_078962.4	Q6ZT98-1
TTLL7	NM_001350214.2 link	c.2630A>G	p.Asn877Ser	missense_variant	22/22		NP_001337143.1
TTLL7	NM_001350215.2 link	c.2549A>G	p.Asn850Ser	missense_variant	20/20		NP_001337144.1
TTLL7	XM_047430691.1 link	c.1895A>G	p.Asn632Ser	missense_variant	15/15		XP_047286647.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TTLL7	ENST00000260505.13 link	c.2630A>G	p.Asn877Ser	missense_variant	21/21	2	NM_024686.6	ENSP00000260505.8		Q6ZT98-1

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152186

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

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:

0.00633

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000474

AC:

AN:

232156

Hom.:

AF XY:

0.0000713

AC XY:

AN XY:

126246

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:

0.0000724

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000835

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000632

AC:

AN:

1440664

Hom.:

Cov.:

AF XY:

0.0000684

AC XY:

AN XY:

716290

show subpopulations

Gnomad4 AFR exome

AF:

0.0000620

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000977

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000661

Gnomad4 OTH exome

AF:

0.000101

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152186

Hom.:

Cov.:

AF XY:

0.0000403

AC XY:

AN XY:

74352

show subpopulations

Gnomad4 AFR

AF:

0.0000482

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

Alfa

AF:

0.0000579

Hom.:

Bravo

AF:

0.0000793

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ExAC

AF:

0.0000659

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

Mar 12, 2024

The c.2630A>G (p.N877S) alteration is located in exon 21 (coding exon 20) of the TTLL7 gene. This alteration results from a A to G substitution at nucleotide position 2630, causing the asparagine (N) at amino acid position 877 to be replaced by a serine (S). 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

0.063

BayesDel_addAF

Benign

-0.48

BayesDel_noAF

Benign

-0.73

CADD

Benign

5.2

DANN

Benign

0.96

DEOGEN2

Benign

0.032

Eigen

Benign

-0.59

Eigen_PC

Benign

-0.48

FATHMM_MKL

Benign

0.65

LIST_S2

Benign

0.68

M_CAP

Benign

0.0054

MetaRNN

Benign

0.054

MetaSVM

Benign

-0.93

MutationAssessor

Benign

1.1

PrimateAI

Benign

0.29

PROVEAN

Benign

-0.61

REVEL

Benign

0.076

Sift

Benign

0.23

Sift4G

Benign

0.17

Polyphen

0.0

Vest4

0.15

MVP

0.12

MPC

0.40

ClinPred

0.027

GERP RS

-1.9

Varity_R

0.036

gMVP

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