20-5946484-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_015939.5(TRMT6):c.178C>T(p.His60Tyr) variant causes a missense change. The variant allele was found at a frequency of 0.0000041 in 1,461,840 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000041 (0 hom.)
• Consequence: TRMT6 NM_015939.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.30

Genes affected

TRMT6 (HGNC:20900): (tRNA methyltransferase 6 non-catalytic subunit) This gene encodes a member of the tRNA methyltransferase 6 protein family. A similar protein in yeast is part of a two component methyltransferase, which is involved in the posttranslational modification that produces the modified nucleoside 1-methyladenosine in tRNAs. Modified 1-methyladenosine influences initiator methionine stability and may be involved in the replication of human immunodeficiency virus type 1. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2013]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
TRMT6	NM_015939.5	c.178C>T	p.His60Tyr	missense_variant	2/11	ENST00000203001.7
TRMT6	NM_001281467.2	c.-223C>T		5_prime_UTR_variant	2/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
TRMT6	ENST00000203001.7	c.178C>T	p.His60Tyr	missense_variant	2/11	1	NM_015939.5	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000410 AC: 6 AN: 1461840 Hom.: 0 Cov.: 31 AF XY: 0.00000825 AC XY: 6 AN XY: 727230

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000540

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Alfa AF: 0.0000935 Hom.: 0

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Nov 21, 2022

The c.178C>T (p.H60Y) alteration is located in exon 2 (coding exon 2) of the TRMT6 gene. This alteration results from a C to T substitution at nucleotide position 178, causing the histidine (H) at amino acid position 60 to be replaced by a tyrosine (Y). 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	0.080
BayesDel_addAF	Benign	-0.087	T
BayesDel_noAF	Benign	-0.36
Cadd	Uncertain	25
Dann	Uncertain	1.0
DEOGEN2	Benign	0.014	T
Eigen	Uncertain	0.42
Eigen_PC	Uncertain	0.48
FATHMM_MKL	Uncertain	0.93	D
LIST_S2	Benign	0.85	D
M_CAP	Benign	0.024	T
MetaRNN	Uncertain	0.66	D
MetaSVM	Benign	-1.1	T
MutationAssessor	Uncertain	2.2	M
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.58	T
PROVEAN	Benign	-1.7	N
REVEL	Benign	0.18
Sift	Benign	0.25	T
Sift4G	Benign	0.89	T
Polyphen		0.93	P
Vest4		0.59
MutPred		0.53		Loss of disorder (P = 0.2008);
MVP		0.39
MPC		0.69
ClinPred		0.80	D
GERP RS		5.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1
Varity_R		0.21
gMVP		0.60

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

Other links and lift over

dbSNP: rs2088708022; hg19: chr20-5927130;