chr22-38716032-G-T

Position:

• chr22-38716032-G-T

Variant summary

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

The NM_004286.5(GTPBP1):​c.430G>T​(p.Val144Leu) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: GTPBP1 NM_004286.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.33

Genes affected

GTPBP1 (HGNC:4669): (GTP binding protein 1) This gene is upregulated by interferon-gamma and encodes a protein that is a member of the AGP11/GTPBP1 family of GTP-binding proteins. A structurally similar protein has been found in mouse, where disruption of the gene for that protein had no observable phenotype. [provided by RefSeq, Jul 2008]

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
GTPBP1	NM_004286.5	c.430G>T	p.Val144Leu	missense_variant	3/12	ENST00000216044.10	NP_004277.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GTPBP1	ENST00000216044.10	c.430G>T	p.Val144Leu	missense_variant	3/12	1	NM_004286.5	ENSP00000216044	P1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

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

Mar 12, 2024

The c.430G>T (p.V144L) alteration is located in exon 3 (coding exon 3) of the GTPBP1 gene. This alteration results from a G to T substitution at nucleotide position 430, causing the valine (V) at amino acid position 144 to be replaced by a leucine (L). 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	0.35
BayesDel_addAF	Uncertain	0.057	T
BayesDel_noAF	Benign	-0.16
CADD	Uncertain	24
DANN	Uncertain	1.0
DEOGEN2	Benign	0.27	T;T;.
Eigen	Uncertain	0.25
Eigen_PC	Uncertain	0.36
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.96	D;D;D
M_CAP	Benign	0.041	D
MetaRNN	Uncertain	0.53	D;D;D
MetaSVM	Benign	-0.73	T
MutationAssessor	Benign	1.7	L;.;.
MutationTaster	Benign	1.0	D
PrimateAI	Uncertain	0.78	T
PROVEAN	Benign	-1.6	N;N;N
REVEL	Benign	0.20
Sift	Benign	0.12	T;T;T
Sift4G	Benign	0.10	T;T;T
Polyphen		0.013	B;.;.
Vest4		0.84
MutPred		0.38		Loss of methylation at R143 (P = 0.0898);.;.;
MVP		0.48
MPC		1.2
ClinPred		0.92	D
GERP RS		4.9
Varity_R		0.16
gMVP		0.85

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr22-39112037;