chr16-88707153-T-C

Position:

• chr16-88707153-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_001012759.3(CTU2):​c.86T>C​(p.Val29Ala) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: CTU2 NM_001012759.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.64

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.29107055).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
CTU2	NM_001012759.3	c.86T>C	p.Val29Ala	missense_variant	2/15	ENST00000453996.7
CTU2	NM_001318507.2	c.86T>C	p.Val29Ala	missense_variant	2/15
CTU2	NM_001012762.3	c.86T>C	p.Val29Ala	missense_variant	2/14
CTU2	NM_001318513.2	c.-97T>C		5_prime_UTR_variant	2/14

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
CTU2	ENST00000453996.7	c.86T>C	p.Val29Ala	missense_variant	2/15	1	NM_001012759.3	P2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 33

Bravo AF: 0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 01, 2022

The c.86T>C (p.V29A) alteration is located in exon 2 (coding exon 2) of the CTU2 gene. This alteration results from a T to C substitution at nucleotide position 86, causing the valine (V) at amino acid position 29 to be replaced by an alanine (A). 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	Uncertain	0.36
BayesDel_addAF	Benign	-0.054	T
BayesDel_noAF	Benign	-0.32
CADD	Uncertain	25
DANN	Uncertain	1.0
DEOGEN2	Benign	0.0064	T;.;.
Eigen	Uncertain	0.29
Eigen_PC	Uncertain	0.29
FATHMM_MKL	Uncertain	0.89	D
LIST_S2	Benign	0.75	T;T;T
M_CAP	Benign	0.020	T
MetaRNN	Benign	0.29	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.3	M;M;.
MutationTaster	Benign	0.77	D;D;D;N
PrimateAI	Pathogenic	0.81	D
PROVEAN	Benign	-2.1	N;N;N
REVEL	Benign	0.10
Sift	Uncertain	0.017	D;D;D
Sift4G	Benign	0.14	T;T;D
Polyphen		0.92	P;D;.
Vest4		0.46
MutPred		0.32		Gain of helix (P = 0.027);Gain of helix (P = 0.027);Gain of helix (P = 0.027);
MVP		0.36
ClinPred		0.96	D
GERP RS		4.2
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
Varity_R		0.19
gMVP		0.36

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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

Other links and lift over

dbSNP: rs926224323; hg19: chr16-88773561;