16-88706552-T-A

Variant summary

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

The NM_001012759.3(CTU2):c.22T>A(p.Tyr8Asn) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000206 in 1,459,230 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000015 ( 0 hom. )

Consequence

CTU2
NM_001012759.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.592

Variant links:

Genes affected

CTU2 (HGNC:28005): (cytosolic thiouridylase subunit 2) This gene encodes a protein which is involved in the post-transcriptional modification of transfer RNAs (tRNAs). The encoded protein plays a role in thiolation of uridine residue present at the wobble position in a subset of tRNAs, resulting in enhanced codon reading accuracy. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jan 2016]

CTU2 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=0.13460514).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
CTU2	NM_001012759.3 linkuse as main transcript	c.22T>A	p.Tyr8Asn	missense_variant	1/15	ENST00000453996.7
CTU2	NM_001318507.2 linkuse as main transcript	c.22T>A	p.Tyr8Asn	missense_variant	1/15
CTU2	NM_001012762.3 linkuse as main transcript	c.22T>A	p.Tyr8Asn	missense_variant	1/14
CTU2	NM_001318513.2 linkuse as main transcript	c.-161T>A		5_prime_UTR_variant	1/14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CTU2	ENST00000453996.7 linkuse as main transcript	c.22T>A	p.Tyr8Asn	missense_variant	1/15	1	NM_001012759.3	P2	Q2VPK5-1

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

151940

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

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:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000153

AC:

AN:

1307290

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

644908

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000862

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

AF:

0.00000658

AC:

AN:

151940

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74206

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000151

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Jul 19, 2022

This sequence change replaces tyrosine, which is neutral and polar, with asparagine, which is neutral and polar, at codon 8 of the CTU2 protein (p.Tyr8Asn). In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Not Available"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Not Available"). This variant has not been reported in the literature in individuals affected with CTU2-related conditions. This variant is present in population databases (no rsID available, gnomAD 0.1%). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Benign

-0.19

BayesDel_noAF

Benign

-0.50

Cadd

Uncertain

Dann

Benign

0.94

DEOGEN2

Benign

0.0041

T;.;.

Eigen

Benign

0.12

Eigen_PC

Benign

-0.053

FATHMM_MKL

Benign

0.0094

LIST_S2

Benign

0.84

T;T;T

M_CAP

Uncertain

0.091

MetaRNN

Benign

0.13

T;T;T

MetaSVM

Benign

-1.1

MutationAssessor

Uncertain

2.5

M;M;.

MutationTaster

Benign

0.85

D;D;D;N

PrimateAI

Pathogenic

0.80

PROVEAN

Benign

-2.3

N;N;N

REVEL

Benign

0.11

Sift

Benign

0.84

T;T;T

Sift4G

Benign

1.0

T;T;T

Polyphen

1.0

D;D;.

Vest4

0.30

MutPred

0.21

Loss of phosphorylation at Y8 (P = 0);Loss of phosphorylation at Y8 (P = 0);Loss of phosphorylation at Y8 (P = 0);

MVP

0.33

ClinPred

0.77

GERP RS

3.2

Varity_R

0.20

gMVP

0.30

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