Genetic Variant NM_001012759.3:c.40G>A (chr16-88706570-G-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001012759.3(CTU2):c.40G>A(p.Glu14Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000153 in 1,305,156 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. E14Q) has been classified as Uncertain significance.

Frequency

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

Exomes 𝑓: 0.0000015 ( 0 hom. )

Failed GnomAD Quality Control

Consequence

CTU2
NM_001012759.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -1.04

Publications

1 publications found

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:

RNF166 (HGNC:28856): (ring finger protein 166) Predicted to enable ubiquitin protein ligase activity. Predicted to be involved in protein polyubiquitination and ubiquitin-dependent protein catabolic process. Predicted to be located in cytoplasm. [provided by Alliance of Genome Resources, Apr 2022]

RNF166 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.044670135).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
CTU2	NM_001012759.3 link	c.40G>A	p.Glu14Lys	missense_variant	Exon 1 of 15	ENST00000453996.7	NP_001012777.1	Q2VPK5-1
RNF166	NM_178841.4 link	c.-245C>T		upstream_gene_variant		ENST00000312838.9	NP_849163.1	Q96A37-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
CTU2	ENST00000453996.7 link	c.40G>A	p.Glu14Lys	missense_variant	Exon 1 of 15	1	NM_001012759.3	ENSP00000388320.2		Q2VPK5-1
RNF166	ENST00000312838.9 link	c.-245C>T		upstream_gene_variant		1	NM_178841.4	ENSP00000326095.4		Q96A37-1

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

152006

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000194

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:

1305156

Hom.:

Cov.:

AF XY:

0.00000155

AC XY:

AN XY:

643696

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

26036

American (AMR)

AF:

0.00

AC:

AN:

22842

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

22732

East Asian (EAS)

AF:

0.00

AC:

AN:

28184

South Asian (SAS)

AF:

0.00

AC:

AN:

71116

European-Finnish (FIN)

AF:

0.00

AC:

AN:

32664

Middle Eastern (MID)

AF:

0.00

AC:

AN:

3888

European-Non Finnish (NFE)

AF:

0.00000192

AC:

AN:

1043722

Other (OTH)

AF:

0.00

AC:

AN:

53972

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Data not reliable, filtered out with message: AS_VQSR

AF:

0.00000657

AC:

AN:

152114

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74348

show subpopulations

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

41518

American (AMR)

AF:

0.00

AC:

AN:

15292

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3466

East Asian (EAS)

AF:

0.000195

AC:

AN:

5140

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10602

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67956

Other (OTH)

AF:

0.00

AC:

AN:

2112

⚠️ The allele balance in gnomAD version 4 Genomes is significantly skewed from the expected value of 0.5. (p-value = 0.000000), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.325

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.0000113

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.069

BayesDel_addAF

Benign

-0.28

BayesDel_noAF

Benign

-0.64

CADD

Benign

2.9

(source)

DANN

Benign

0.83

DEOGEN2

Benign

0.0057

T;.;.

Eigen

Benign

-1.7

Eigen_PC

Benign

-1.8

FATHMM_MKL

Benign

0.000070

LIST_S2

Benign

0.36

T;T;T

M_CAP

Benign

0.036

MetaRNN

Benign

0.045

T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Benign

0.46

N;N;.

PhyloP100

-1.0

PrimateAI

Uncertain

0.67

PROVEAN

Benign

-0.61

N;N;N

REVEL

Benign

0.017

Sift

Benign

0.72

T;T;T

Sift4G

Benign

0.81

T;T;T

Polyphen

0.0010

B;B;.

Vest4

0.098

MutPred

0.15

Gain of ubiquitination at E14 (P = 0.0016);Gain of ubiquitination at E14 (P = 0.0016);Gain of ubiquitination at E14 (P = 0.0016);

MVP

0.067

ClinPred

0.036

GERP RS

-4.4

PromoterAI

0.065

Neutral

(source)

Varity_R

0.054

gMVP

0.31

Mutation Taster

=96/4

polymorphism

(source)

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

NM_001012759.3:c.40G>A

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over