X-54440690-A-G

Position:

• chrX-54440690-A-G

Variant summary

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

The NM_058163.3(TSR2):​c.82A>G​(p.Ile28Val) variant causes a missense, splice region change. The variant was absent in control chromosomes in GnomAD project. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 23)
• Consequence: TSR2 NM_058163.3 missense, splice_region
• Scores: Splicing: ADA: 0.5796
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.84

Genes affected

TSR2 (HGNC:25455): (TSR2 ribosome maturation factor) The protein encoded by this gene appears to repress the transcription of NF-kappaB and may be involved in apoptosis. Defects in this gene are a cause of Diamond-Blackfan anemia. [provided by RefSeq, Oct 2016]

ACMG classification

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	Protein	UniProt
TSR2	NM_058163.3	c.82A>G	p.Ile28Val	missense_variant, splice_region_variant	2/5	ENST00000375151.5	NP_477511.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
TSR2	ENST00000375151.5	c.82A>G	p.Ile28Val	missense_variant, splice_region_variant	2/5	1	NM_058163.3	ENSP00000364293	P1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 23

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Nov 07, 2023

This sequence change replaces isoleucine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 28 of the TSR2 protein (p.Ile28Val). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with TSR2-related conditions. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be tolerated. 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.44
BayesDel_addAF	Uncertain	0.025	T
BayesDel_noAF	Benign	-0.20
CADD	Uncertain	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.25	T
FATHMM_MKL	Benign	0.51	D
LIST_S2	Benign	0.65	T
M_CAP	Benign	0.037	D
MetaRNN	Uncertain	0.53	D
MetaSVM	Benign	-0.54	T
MutationAssessor	Benign	1.4	L
MutationTaster	Benign	1.0	D
PrimateAI	Pathogenic	0.83	D
PROVEAN	Benign	-0.66	N
REVEL	Benign	0.25
Sift	Pathogenic	0.0	D
Sift4G	Uncertain	0.033	D
Polyphen		0.99	D
Vest4		0.32
MutPred		0.59		Gain of sheet (P = 0.1451);
MVP		0.37
MPC		0.48
ClinPred		0.85	D
GERP RS		5.0
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.6
Varity_R		0.60
gMVP		0.44

Splicing

Name	Calibrated prediction	Score	Prediction
dbscSNV1_ADA	Benign	0.58
dbscSNV1_RF	Benign	0.51
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

No publications associated with this variant yet.

Other links and lift over

hg19: chrX-54467123;