chrX-51743814-T-C

Position:

• chrX-51743814-T-C

Variant summary

Our verdict is Likely benign. Variant got -6 ACMG points: 0P and 6B. BP4_Moderate BS2

The NM_018094.5(GSPT2):​c.188T>C​(p.Val63Ala) variant causes a missense change. The variant allele was found at a frequency of 0.0000146 in 1,097,174 control chromosomes in the GnomAD database, with no homozygous occurrence. There are 8 hemizygotes in GnomAD. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 23)
  • Exomes 𝑓: 0.000015 (0 hom. 8 hem.)
• Consequence: GSPT2 NM_018094.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.11

Genes affected

GSPT2 (HGNC:4622): (G1 to S phase transition 2) This gene encodes a GTPase that belongs to the GTP-binding elongation factor family. The encoded protein is a polypeptide release factor that complexes with eukaryotic peptide chain release factor 1 to mediate translation termination. This protein may also be involved in mRNA stability.[provided by RefSeq, Mar 2010]

ACMG classification

Verdict is Likely_benign. Variant got -6 ACMG points.

• BP4: Computational evidence support a benign effect (MetaRNN=0.23405766).
• BS2: High Hemizygotes in GnomAdExome4 at 8 gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GSPT2	NM_018094.5	c.188T>C	p.Val63Ala	missense_variant	1/1	ENST00000340438.6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GSPT2	ENST00000340438.6	c.188T>C	p.Val63Ala	missense_variant	1/1		NM_018094.5	P1

Frequencies

GnomAD3 genomes Cov.: 23

GnomAD4 exome AF: 0.0000146 AC: 16 AN: 1097174 Hom.: 0 Cov.: 32 AF XY: 0.0000221 AC XY: 8 AN XY: 362708

Gnomad4 AFR exome AF: 0.00

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: 0.0000178

Gnomad4 OTH exome AF: 0.0000217

GnomAD4 genome Cov.: 23

Bravo AF: 0.0000189

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

Jan 24, 2023

The c.188T>C (p.V63A) alteration is located in exon 1 (coding exon 1) of the GSPT2 gene. This alteration results from a T to C substitution at nucleotide position 188, causing the valine (V) at amino acid position 63 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	Pathogenic	0.61
BayesDel_addAF	Benign	-0.23	T
BayesDel_noAF	Benign	-0.57
CADD	Benign	23
DANN	Uncertain	0.99
DEOGEN2	Benign	0.064	T
FATHMM_MKL	Uncertain	0.81	D
LIST_S2	Uncertain	0.93	D
M_CAP	Uncertain	0.087	D
MetaRNN	Benign	0.23	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Uncertain	2.2	M
MutationTaster	Benign	1.0	D
PrimateAI	Pathogenic	0.80	T
PROVEAN	Benign	-0.82	N
REVEL	Benign	0.13
Sift	Benign	0.11	T
Sift4G	Benign	0.65	T
Polyphen		0.73	P
Vest4		0.10
MutPred		0.55		Loss of stability (P = 0.0865);
MVP		0.64
MPC		1.0
ClinPred		0.80	D
GERP RS		3.6
Varity_R		0.49
gMVP		0.24

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

Other links and lift over

dbSNP: rs1033702848; hg19: chrX-51486910;