Genetic Variant THUMPD3:p.Lys65Arg (chr3-9365262-A-G) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001114092.2(THUMPD3):c.194A>G(p.Lys65Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,256 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

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

Consequence

THUMPD3
NM_001114092.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.02

Variant links:

Genes affected

THUMPD3 (HGNC:24493): (THUMP domain containing 3) Predicted to enable tRNA (guanine) methyltransferase activity. Predicted to be involved in tRNA methylation. Located in cytosol and nucleolus. [provided by Alliance of Genome Resources, Apr 2022]

THUMPD3 links:

THUMPD3-AS1 (HGNC:44478): (THUMPD3 antisense RNA 1)

THUMPD3-AS1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.03711891).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
THUMPD3	NM_001114092.2 link	c.194A>G	p.Lys65Arg	missense_variant	Exon 2 of 10	ENST00000452837.7	NP_001107564.1	Q9BV44A0A024R2D3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
THUMPD3	ENST00000452837.7 link	c.194A>G	p.Lys65Arg	missense_variant	Exon 2 of 10	1	NM_001114092.2	ENSP00000395893.2		Q9BV44

Frequencies

GnomAD3 genomes

AF:

0.00000657

AC:

AN:

152256

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

AF:

0.00000657

AC:

AN:

152256

Hom.:

Cov.:

AF XY:

0.0000134

AC XY:

AN XY:

74392

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 15, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.194A>G (p.K65R) alteration is located in exon 2 (coding exon 1) of the THUMPD3 gene. This alteration results from a A to G substitution at nucleotide position 194, causing the lysine (K) at amino acid position 65 to be replaced by an arginine (R). 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

Benign

0.062

BayesDel_addAF

Benign

-0.29

BayesDel_noAF

Benign

-0.66

CADD

Benign

DANN

Benign

0.96

DEOGEN2

Benign

0.0010

T;.;T;T

Eigen

Benign

-0.79

Eigen_PC

Benign

-0.60

FATHMM_MKL

Benign

0.36

LIST_S2

Benign

0.70

.;T;.;T

M_CAP

Benign

0.0026

MetaRNN

Benign

0.037

T;T;T;T

MetaSVM

Benign

-0.99

MutationAssessor

Benign

-0.42

N;.;N;N

PrimateAI

Benign

0.33

PROVEAN

Benign

-0.30

N;N;N;N

REVEL

Benign

0.084

Sift

Benign

0.53

T;T;T;T

Sift4G

Benign

0.80

T;T;T;T

Polyphen

0.0010

B;.;B;B

Vest4

0.025

MutPred

0.31

Loss of methylation at K65 (P = 0.0097);Loss of methylation at K65 (P = 0.0097);Loss of methylation at K65 (P = 0.0097);Loss of methylation at K65 (P = 0.0097);

MVP

0.31

MPC

0.045

ClinPred

0.075

GERP RS

-1.4

Varity_R

0.018

gMVP

0.21

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.030

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over