Genetic Variant MRTO4:p.Tyr85His (chr1-19257125-T-C) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_016183.4(MRTO4):c.253T>C(p.Tyr85His) variant causes a missense change. The variant allele was found at a frequency of 0.00000684 in 1,461,856 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000068 ( 0 hom. )

Consequence

MRTO4
NM_016183.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 7.01

Variant links:

Genes affected

MRTO4 (HGNC:18477): (MRT4 homolog, ribosome maturation factor) This gene encodes a protein sharing a low level of sequence similarity with ribosomal protein P0. While the precise function of the encoded protein is currently unknown, it appears to be involved in mRNA turnover and ribosome assembly. [provided by RefSeq, Jul 2008]

MRTO4 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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 rank	MANE	Protein	UniProt
MRTO4	NM_016183.4 link	c.253T>C	p.Tyr85His	missense_variant	Exon 4 of 8	ENST00000330263.5	NP_057267.2	Q9UKD2A0A024RAE1
MRTO4	XM_006710675.5 link	c.112T>C	p.Tyr38His	missense_variant	Exon 4 of 8		XP_006710738.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MRTO4	ENST00000330263.5 link	c.253T>C	p.Tyr85His	missense_variant	Exon 4 of 8	1	NM_016183.4	ENSP00000364320.3		Q9UKD2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000398

AC:

AN:

251388

Hom.:

AF XY:

0.00000736

AC XY:

AN XY:

135858

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000879

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000684

AC:

AN:

1461856

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

727226

show subpopulations

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:

0.00000899

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Feb 18, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.253T>C (p.Y85H) alteration is located in exon 4 (coding exon 4) of the MRTO4 gene. This alteration results from a T to C substitution at nucleotide position 253, causing the tyrosine (Y) at amino acid position 85 to be replaced by a histidine (H). 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

Pathogenic

0.66

BayesDel_addAF

Pathogenic

0.17

BayesDel_noAF

Uncertain

0.010

CADD

Benign

DANN

Uncertain

1.0

DEOGEN2

Benign

0.18

Eigen

Benign

0.19

Eigen_PC

Uncertain

0.34

FATHMM_MKL

Uncertain

0.97

LIST_S2

Uncertain

0.96

M_CAP

Benign

0.0054

MetaRNN

Uncertain

0.60

MetaSVM

Benign

-0.78

MutationAssessor

Uncertain

2.1

PrimateAI

Uncertain

0.76

PROVEAN

Uncertain

-3.1

REVEL

Benign

0.17

Sift

Benign

0.18

Sift4G

Benign

0.32

Polyphen

0.17

Vest4

0.76

MutPred

0.40

Loss of phosphorylation at Y85 (P = 0.0059);

MVP

0.57

MPC

0.064

ClinPred

0.63

GERP RS

5.8

RBP_binding_hub_radar

0.92

RBP_regulation_power_radar

2.6

Varity_R

0.31

gMVP

0.62

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