Genetic Variant NM_001195422.1:c.104G>A (chr19-17335107-G-A) – ACMG Classification: Pathogenic (12 pts)

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1PM2PP5_Moderate

The NM_001195422.1(GTPBP3):c.104G>A(p.Trp35*) variant causes a stop gained change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000456 in 1,536,044 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★). Variant results in nonsense mediated mRNA decay.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000036 ( 0 hom. )

Consequence

GTPBP3
NM_001195422.1 stop_gained

Scores

Clinical Significance

Likely pathogenic criteria provided, single submitter P:1

Conservation

PhyloP100: 0.334

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:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 12 ACMG points.

PVS1

Loss of function variant, product undergoes nonsense mediated mRNA decay. LoF is a known mechanism of disease.

PM2

Very rare variant in population databases, with high coverage;

PP5

Variant 19-17335107-G-A is Pathogenic according to our data. Variant chr19-17335107-G-A is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 3893164.Status of the report is criteria_provided_single_submitter, 1 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_001195422.1. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GTPBP3	NM_001195422.1		c.104G>A	p.Trp35*	stop_gained	Exon 1 of 9	NP_001182351.1	B7Z563

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GTPBP3	ENST00000361619.9	TSL:2	c.104G>A	p.Trp35*	stop_gained	Exon 1 of 9	ENSP00000354598.4	Q969Y2-4
GTPBP3	ENST00000598532.1	TSL:4	n.108G>A		non_coding_transcript_exon	Exon 1 of 2
GTPBP3	ENST00000601213.5	TSL:4	n.104G>A		non_coding_transcript_exon	Exon 1 of 4	ENSP00000471657.1	M0R161

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152184

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000414

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.00000361

AC:

AN:

1383742

Hom.:

Cov.:

AF XY:

0.00000732

AC XY:

AN XY:

682812

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

31594

American (AMR)

AF:

0.00

AC:

AN:

35696

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25178

East Asian (EAS)

AF:

0.00

AC:

AN:

35734

South Asian (SAS)

AF:

0.0000631

AC:

AN:

79236

European-Finnish (FIN)

AF:

0.00

AC:

AN:

33888

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5696

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1078820

Other (OTH)

AF:

0.00

AC:

AN:

57900

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

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152302

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74478

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41562

American (AMR)

AF:

0.00

AC:

AN:

15284

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5188

South Asian (SAS)

AF:

0.000414

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10618

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68026

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00

Hom.:

ClinVar

ClinVar submissions

Significance:Likely pathogenic

Revision:criteria provided, single submitter

View on ClinVar

Pathogenic

VUS

Benign

Condition

Combined oxidative phosphorylation defect type 23 (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.38

BayesDel_noAF

Benign

-0.78

CADD

Benign

(source)

DANN

Benign

0.95

Eigen

Benign

-0.77

Eigen_PC

Benign

-0.95

FATHMM_MKL

Benign

0.053

PhyloP100

0.33

Vest4

0.098

GERP RS

0.96

PromoterAI

-0.042

Neutral

(source)

Mutation Taster

=81/119

disease causing (fs/PTC)

(source)

Splicing

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

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over