Genetic Variant GTPBP3:p.Glu459Gln (chr19-17341599-G-C) – ACMG Classification: Uncertain_significance (3 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 4P and 1B. PM2PM5BP4

The NM_032620.4(GTPBP3):c.1375G>C(p.Glu459Gln) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,608 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts 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. E459K) has been classified as Pathogenic.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

GTPBP3
NM_032620.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 6.89

Publications

0 publications found

Variant links:

Genes affected

GTPBP3 (HGNC:14880): (GTP binding protein 3, mitochondrial) This locus encodes a GTP-binding protein. The encoded protein is localized to the mitochondria and may play a role in mitochondrial tRNA modification. Polymorphisms at this locus may be associated with severity of aminoglycoside-induced deafness, a disease associated with a mutation in the 12S rRNA. Alternatively spliced transcript variants encoding different isoforms have been described. [provided by RefSeq, Sep 2010]

GTPBP3 Gene-Disease associations (from GenCC):

combined oxidative phosphorylation defect type 23
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, G2P
mitochondrial disease
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
Leigh syndrome
Inheritance: AR Classification: MODERATE Submitted by: ClinGen

GTPBP3 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PM5

Other missense variant is known to change same aminoacid residue: Variant chr19-17341599-G-A is described in ClinVar as Pathogenic. ClinVar VariationId is 180615.Status of the report is no_assertion_criteria_provided, 0 stars.

BP4

Computational evidence support a benign effect (MetaRNN=0.38558638).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_032620.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GTPBP3	NM_032620.4	MANE Select	c.1375G>C	p.Glu459Gln	missense	Exon 9 of 9	NP_116009.2	Q969Y2-1
GTPBP3	NM_133644.4		c.1471G>C	p.Glu491Gln	missense	Exon 8 of 8	NP_598399.2	Q969Y2-2
GTPBP3	NM_001195422.1		c.1441G>C	p.Glu481Gln	missense	Exon 9 of 9	NP_001182351.1	B7Z563

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GTPBP3	ENST00000324894.13	TSL:1 MANE Select	c.1375G>C	p.Glu459Gln	missense	Exon 9 of 9	ENSP00000313818.7	Q969Y2-1
GTPBP3	ENST00000600625.5	TSL:1	c.1312G>C	p.Glu438Gln	missense	Exon 9 of 9	ENSP00000473150.1	Q969Y2-3
GTPBP3	ENST00000358792.11	TSL:2	c.1471G>C	p.Glu491Gln	missense	Exon 8 of 8	ENSP00000351644.6	Q969Y2-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461608

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

727094

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.00

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53206

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111952

Other (OTH)

AF:

0.00

AC:

AN:

60390

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.525

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.34

BayesDel_addAF

Benign

-0.056

BayesDel_noAF

Benign

-0.32

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.29

Eigen

Uncertain

0.49

Eigen_PC

Uncertain

0.44

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.96

M_CAP

Benign

0.038

MetaRNN

Benign

0.39

MetaSVM

Benign

-0.83

MutationAssessor

Uncertain

2.8

PhyloP100

6.9

PrimateAI

Uncertain

0.57

PROVEAN

Benign

-1.3

REVEL

Benign

0.15

Sift

Benign

0.27

Sift4G

Benign

0.15

Polyphen

0.89

Vest4

0.58

MutPred

0.47

Gain of MoRF binding (P = 0.0279)

MVP

0.77

MPC

0.98

ClinPred

0.98

GERP RS

4.5

Varity_R

0.31

gMVP

0.66

Mutation Taster

=33/67

disease causing

(source)

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over