Genetic Variant TRMT1:p.Glu589Glu (chr19-13105333-C-T) – ACMG Classification: Benign (-15 pts)

Variant summary

Our verdict is Benign. Variant got -15 ACMG points: 0P and 15B. BP4_StrongBP6_ModerateBP7BS1BS2

The NM_001136035.4(TRMT1):c.1767G>A(p.Glu589Glu) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00184 in 1,614,020 control chromosomes in the GnomAD database, including 3 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: 𝑓 0.00089 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0019 ( 3 hom. )

Consequence

TRMT1
NM_001136035.4 synonymous

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: 0.251

Variant links:

Genes affected

TRMT1 (HGNC:25980): (tRNA methyltransferase 1) This gene encodes a tRNA-modifying enzyme that acts as a dimethyltransferase, modifying a single guanine residue at position 26 of the tRNA. The encoded enzyme has both mono- and dimethylase activity when exogenously expressed, and uses S-adenosyl methionine as a methyl donor. The C-terminal region of the encoded protein has both a zinc finger motif, and an arginine/proline-rich region. Mutations in this gene have been implicated in autosomal recessive intellectual disorder (ARID). Alternative splicing results in multiple transcript variants encoding different isoforms. There is a pseudogene of this gene on the X chromosome. [provided by RefSeq, May 2017]

TRMT1 links:

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ACMG classification

Classification made for transcript

Verdict is Benign. Variant got -15 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.65).

BP6

Variant 19-13105333-C-T is Benign according to our data. Variant chr19-13105333-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 3770649.Status of the report is criteria_provided_single_submitter, 1 stars.

BP7

Synonymous conserved (PhyloP=0.251 with no splicing effect.

BS1

Variant frequency is greater than expected in population nfe. gnomad4 allele frequency = 0.000893 (136/152368) while in subpopulation NFE AF= 0.00168 (114/68036). AF 95% confidence interval is 0.00143. There are 0 homozygotes in gnomad4. There are 60 alleles in male gnomad4 subpopulation. Median coverage is 32. This position pass quality control queck.

BS2

High Homozygotes in GnomAdExome4 at 3 AR gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
TRMT1	NM_001136035.4 link	c.1767G>A	p.Glu589Glu	synonymous_variant	Exon 16 of 17	ENST00000357720.9	NP_001129507.1	Q9NXH9-1A0A024R7I5

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
TRMT1	ENST00000357720.9 link	c.1767G>A	p.Glu589Glu	synonymous_variant	Exon 16 of 17	2	NM_001136035.4	ENSP00000350352.4		Q9NXH9-1

Frequencies

GnomAD3 genomes

AF:

0.000900

AC:

137

AN:

152250

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000386

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000289

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.000471

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00169

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000876

AC:

220

AN:

251154

Hom.:

AF XY:

0.000891

AC XY:

121

AN XY:

135846

show subpopulations

Gnomad AFR exome

AF:

0.000370

Gnomad AMR exome

AF:

0.0000289

Gnomad ASJ exome

AF:

0.0000994

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.000463

Gnomad NFE exome

AF:

0.00174

Gnomad OTH exome

AF:

0.000653

GnomAD4 exome

AF:

0.00194

AC:

2835

AN:

1461652

Hom.:

Cov.:

AF XY:

0.00185

AC XY:

1348

AN XY:

727138

show subpopulations

Gnomad4 AFR exome

AF:

0.000388

Gnomad4 AMR exome

AF:

0.0000894

Gnomad4 ASJ exome

AF:

0.0000383

Gnomad4 EAS exome

AF:

0.0000252

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.000564

Gnomad4 NFE exome

AF:

0.00239

Gnomad4 OTH exome

AF:

0.00212

GnomAD4 genome

AF:

0.000893

AC:

136

AN:

152368

Hom.:

Cov.:

AF XY:

0.000805

AC XY:

AN XY:

74508

show subpopulations

Gnomad4 AFR

AF:

0.000385

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.000289

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.000471

Gnomad4 NFE

AF:

0.00168

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.00134

Hom.:

Bravo

AF:

0.000805

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00131

EpiControl

AF:

0.00154

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not provided

Benign:1

Jan 01, 2025

CeGaT Center for Human Genetics Tuebingen

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

TRMT1: BP4, BP7 -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.65

CADD

Benign

2.8

DANN

Benign

0.84

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

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