Variant chr8-33499274-G-C details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_001102401.4(TTI2):c.1426C>G(p.Leu476Val) variant causes a missense change. The variant allele was found at a frequency of 0.000000685 in 1,460,446 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

TTI2
NM_001102401.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 5.53

Variant links:

Genes affected

TTI2 (HGNC:26262): (TELO2 interacting protein 2) This gene encodes a regulator of the DNA damage response. The protein is a component of the Triple T complex (TTT) which also includes telomere length regulation protein and TELO2 interacting protein 1. The TTT complex is involved in cellular resistance to DNA damage stresses and may act as a regulator of phosphoinositide-3-kinase-related protein kinase (PIKK) abundance. [provided by RefSeq, May 2013]

TTI2 links:

MAK16 (HGNC:13703): (MAK16 homolog) Enables RNA binding activity. Predicted to be involved in maturation of 5.8S rRNA and maturation of LSU-rRNA. Located in nucleolus. [provided by Alliance of Genome Resources, Apr 2022]

MAK16 links:

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ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TTI2	NM_001102401.4 linkuse as main transcript	c.1426C>G	p.Leu476Val	missense_variant	8/8	ENST00000431156.7
MAK16	NM_032509.4 linkuse as main transcript	c.*645G>C		3_prime_UTR_variant	10/10	ENST00000360128.11

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TTI2	ENST00000431156.7 linkuse as main transcript	c.1426C>G	p.Leu476Val	missense_variant	8/8	1	NM_001102401.4	P1
MAK16	ENST00000360128.11 linkuse as main transcript	c.*645G>C		3_prime_UTR_variant	10/10	1	NM_032509.4	P1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.85e-7

AC:

AN:

1460446

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726686

show subpopulations

Gnomad4 AFR exome

AF:

0.0000299

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:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 09, 2023

The c.1426C>G (p.L476V) alteration is located in exon 7 (coding exon 7) of the TTI2 gene. This alteration results from a C to G substitution at nucleotide position 1426, causing the leucine (L) at amino acid position 476 to be replaced by a valine (V). 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

0.13

BayesDel_addAF

Uncertain

0.022

BayesDel_noAF

Benign

-0.21

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.012

T;T;T;.

Eigen

Uncertain

0.57

Eigen_PC

Uncertain

0.62

FATHMM_MKL

Uncertain

0.95

LIST_S2

Benign

0.76

T;.;.;T

M_CAP

Benign

0.015

MetaRNN

Uncertain

0.45

T;T;T;T

MetaSVM

Benign

-0.42

MutationAssessor

Uncertain

2.6

M;M;M;.

MutationTaster

Benign

1.0

D;D;D;D;D;N

PrimateAI

Benign

0.43

PROVEAN

Benign

-0.52

.;N;N;N

REVEL

Benign

0.11

Sift

Uncertain

0.011

.;D;D;D

Sift4G

Uncertain

0.031

D;D;D;D

Polyphen

1.0

D;D;D;D

Vest4

0.45

MutPred

0.21

Loss of helix (P = 0.0376);Loss of helix (P = 0.0376);Loss of helix (P = 0.0376);.;

MVP

0.69

MPC

0.53

ClinPred

0.80

GERP RS

5.9

Varity_R

0.12

gMVP

0.077

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

No publications associated with this variant yet.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over