dbSNP rs764506732: TRIT1:p.Glu409Lys (chr1-39844110-C-T) – ACMG Classification: Pathogenic (15 pts)

Variant summary

Our verdict is Pathogenic. The variant received 15 ACMG points: 15P and 0B. PS3PM2PP3PP5_Very_Strong

The NM_017646.6(TRIT1):c.1225G>A(p.Glu409Lys) variant causes a missense change. The variant allele was found at a frequency of 0.00000372 in 1,613,160 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). ClinVar reports functional evidence for this variant: "SCV005329535: Protein structure analysis revealed thatthis variant disrupts the conformation and electrostatic charge of the zinc-finger motif in the tRNA isopentenyltransferase (IPT),impairing binding of the mutant IPT to specific DNA sequences (Yoo S, et al., 2021).".

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 33)

Exomes 𝑓: 0.0000034 ( 0 hom. )

Consequence

TRIT1
NM_017646.6 missense

Scores

Clinical Significance

Likely pathogenic criteria provided, multiple submitters, no conflicts P:3

Conservation

PhyloP100: 6.77

Publications

3 publications found

Variant links:

Genes affected

TRIT1 (HGNC:20286): (tRNA isopentenyltransferase 1) This gene encodes a protein that that is targeted to the mitochondrion and modifies transfer RNAs (tRNAs) by adding a dimethylallyl group onto the adenine at position 37. This modification is important for maintaining the correct reading frame during protein translation. This gene is considered a tumor suppressor and its expression can decrease cell growth. Alternative splicing results in multiple transcripts variants, most of which are likely non-functional. [provided by RefSeq, Aug 2015]

TRIT1 Gene-Disease associations (from GenCC):

mitochondrial disease
Inheritance: AR Classification: DEFINITIVE Submitted by: ClinGen
combined oxidative phosphorylation deficiency 35
Inheritance: AR Classification: STRONG, LIMITED Submitted by: Labcorp Genetics (formerly Invitae), G2P

TRIT1 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Pathogenic. The variant received 15 ACMG points.

PS3

PS3 evidence extracted from ClinVar submissions: SCV005329535: Protein structure analysis revealed thatthis variant disrupts the conformation and electrostatic charge of the zinc-finger motif in the tRNA isopentenyltransferase (IPT),impairing binding of the mutant IPT to specific DNA sequences (Yoo S, et al., 2021).

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.768

PP5

Variant 1-39844110-C-T is Pathogenic according to our data. Variant chr1-39844110-C-T is described in ClinVar as Likely_pathogenic. ClinVar VariationId is 1201174.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_017646.6. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
TRIT1	NM_017646.6	MANE Select	c.1225G>A	p.Glu409Lys	missense	Exon 10 of 11	NP_060116.2
TRIT1	NM_001312691.1		c.1147G>A	p.Glu383Lys	missense	Exon 9 of 10	NP_001299620.1	Q9H3H1-4
TRIT1	NM_001312692.1		c.979G>A	p.Glu327Lys	missense	Exon 8 of 9	NP_001299621.1	Q9H3H1-5

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
TRIT1	ENST00000316891.10	TSL:1 MANE Select	c.1225G>A	p.Glu409Lys	missense	Exon 10 of 11	ENSP00000321810.5	Q9H3H1-1
TRIT1	ENST00000372818.5	TSL:1	c.1147G>A	p.Glu383Lys	missense	Exon 9 of 10	ENSP00000361905.1	Q9H3H1-4
TRIT1	ENST00000441669.6	TSL:1	c.979G>A	p.Glu327Lys	missense	Exon 8 of 9	ENSP00000388333.2	Q9H3H1-5

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152210

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000398

AC:

AN:

251306

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.0000615

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000342

AC:

AN:

1460950

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

726862

show subpopulations

African (AFR)

AF:

0.0000299

AC:

AN:

33462

American (AMR)

AF:

0.00

AC:

AN:

44710

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26120

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39696

South Asian (SAS)

AF:

0.00

AC:

AN:

86218

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53410

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1111200

Other (OTH)

AF:

0.00

AC:

AN:

60368

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.455

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:

0.00000657

AC:

AN:

152210

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

74342

show subpopulations

African (AFR)

AF:

0.0000241

AC:

AN:

41442

American (AMR)

AF:

0.00

AC:

AN:

15280

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5204

South Asian (SAS)

AF:

0.00

AC:

AN:

4830

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10610

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68050

Other (OTH)

AF:

0.00

AC:

AN:

2094

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.625

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.0000936

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.00000824

AC:

ClinVar

ClinVar submissions

Significance:Likely pathogenic

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not provided (2)

Combined oxidative phosphorylation deficiency 35 (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.88

BayesDel_addAF

Uncertain

0.16

BayesDel_noAF

Pathogenic

0.17

CADD

Pathogenic

(source)

DANN

Uncertain

1.0

DEOGEN2

Benign

0.078

Eigen

Uncertain

0.58

Eigen_PC

Uncertain

0.51

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Pathogenic

0.98

M_CAP

Benign

0.043

MetaRNN

Pathogenic

0.77

MetaSVM

Benign

-0.52

MutationAssessor

Uncertain

2.6

PhyloP100

6.8

PrimateAI

Uncertain

0.76

PROVEAN

Benign

-2.3

REVEL

Uncertain

0.36

Sift

Uncertain

0.0050

Sift4G

Uncertain

0.015

Polyphen

1.0

Vest4

0.89

MutPred

0.54

Gain of MoRF binding (P = 0.0021)

MVP

0.71

MPC

0.95

ClinPred

0.90

GERP RS

5.1

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.36

gMVP

0.69

Mutation Taster

=59/41

polymorphism

(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

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over