rs119478059

Variant summary

Our verdict is Pathogenic. Variant got 12 ACMG points: 12P and 0B. PM2PP3_ModeratePP5_Very_Strong

The NM_020191.4(MRPS22):c.509G>A(p.Arg170His) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000145 in 1,613,936 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. 12/20 in silico tools predict a damaging outcome for this variant. Variant has been reported in ClinVar as Likely pathogenic (★★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R170C) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.00015 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00014 ( 0 hom. )

Consequence

MRPS22
NM_020191.4 missense

Scores

Clinical Significance

Pathogenic/Likely pathogenic criteria provided, multiple submitters, no conflicts P:5

Conservation

PhyloP100: 9.13

Variant links:

Genes affected

MRPS22 (HGNC:14508): (mitochondrial ribosomal protein S22) Mammalian mitochondrial ribosomal proteins are encoded by nuclear genes and help in protein synthesis within the mitochondrion. Mitochondrial ribosomes (mitoribosomes) consist of a small 28S subunit and a large 39S subunit. They have an estimated 75% protein to rRNA composition compared to prokaryotic ribosomes, where this ratio is reversed. Another difference between mammalian mitoribosomes and prokaryotic ribosomes is that the latter contain a 5S rRNA. Among different species, the proteins comprising the mitoribosome differ greatly in sequence, and sometimes in biochemical properties, which prevents easy recognition by sequence homology. This gene encodes a 28S subunit protein that does not seem to have a counterpart in prokaryotic and fungal-mitochondrial ribosomes. This gene lies telomeric of and is transcribed in the opposite direction from the forkhead box L2 gene. A pseudogene corresponding to this gene is found on chromosome Xq. [provided by RefSeq, Jul 2008]

MRPS22 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Pathogenic. Variant got 12 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.905

PP5

Variant 3-139350183-G-A is Pathogenic according to our data. Variant chr3-139350183-G-A is described in ClinVar as [Likely_pathogenic]. Clinvar id is 4753.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr3-139350183-G-A is described in Lovd as [Likely_pathogenic]. Variant chr3-139350183-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
MRPS22	NM_020191.4 linkuse as main transcript	c.509G>A	p.Arg170His	missense_variant	4/8	ENST00000680020.1
MRPS22	NM_001363893.1 linkuse as main transcript	c.506G>A	p.Arg169His	missense_variant	4/8
MRPS22	NM_001363857.1 linkuse as main transcript	c.386G>A	p.Arg129His	missense_variant	4/8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MRPS22	ENST00000680020.1 linkuse as main transcript	c.509G>A	p.Arg170His	missense_variant	4/8		NM_020191.4	P4	P82650-1

Frequencies

GnomAD3 genomes

AF:

0.000151

AC:

AN:

152116

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:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.000294

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.0000836

AC:

AN:

251196

Hom.:

AF XY:

0.0000442

AC XY:

AN XY:

135756

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:

0.000185

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000144

AC:

211

AN:

1461820

Hom.:

Cov.:

AF XY:

0.000135

AC XY:

AN XY:

727216

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000447

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000348

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000174

Gnomad4 OTH exome

AF:

0.000215

GnomAD4 genome

AF:

0.000151

AC:

AN:

152116

Hom.:

Cov.:

AF XY:

0.000161

AC XY:

AN XY:

74308

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000207

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000294

Gnomad4 OTH

AF:

0.000479

Alfa

AF:

0.000118

Hom.:

Bravo

AF:

0.000144

TwinsUK

AF:

0.00

AC:

ALSPAC

AF:

0.000259

AC:

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000349

AC:

ExAC

AF:

0.0000576

AC:

EpiCase

AF:

0.000382

EpiControl

AF:

0.000356

ClinVar

Significance: Pathogenic/Likely pathogenic

Submissions summary: Pathogenic:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Pathogenic:2

Likely pathogenic, criteria provided, single submitter	clinical testing	GeneDx	Apr 13, 2023	In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; This variant is associated with the following publications: (PMID: 18539099, 29096039, 31683770, 17873122, 31589614, 33917098, 33314036, 27535533) -
Pathogenic, criteria provided, single submitter	clinical testing	Invitae	Aug 28, 2021	This sequence change replaces arginine with histidine at codon 170 of the MRPS22 protein (p.Arg170His). The arginine residue is highly conserved and there is a small physicochemical difference between arginine and histidine. This variant is present in population databases (rs119478059, ExAC 0.01%). This missense change has been observed in individual(s) with MRPS22-related disease (PMID: 29096039; 17873122and29096039). In at least one individual the data is consistent with the variant being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. ClinVar contains an entry for this variant (Variation ID: 4753). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). Experimental studies have shown that this missense change affects MRPS22 function (PMID: 17873122, 18539099). For these reasons, this variant has been classified as Pathogenic. -

Hypotonia with lactic acidemia and hyperammonemia

Pathogenic:2

Likely pathogenic, criteria provided, single submitter	clinical testing	Equipe Genetique des Anomalies du Developpement, Université de Bourgogne	Oct 01, 2019	This variant was observed in compound heterozygosity with variant c.480_481insA -
Pathogenic, no assertion criteria provided	literature only	OMIM	Dec 01, 2007	- -

Hypotonia with lactic acidemia and hyperammonemia;C4748263:Ovarian dysgenesis 7

Pathogenic:1

Likely pathogenic, criteria provided, single submitter

clinical testing

Fulgent Genetics, Fulgent Genetics

Mar 22, 2022

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.70

BayesDel_addAF

Pathogenic

0.31

BayesDel_noAF

Pathogenic

0.47

Cadd

Pathogenic

Dann

Pathogenic

1.0

DEOGEN2

Pathogenic

0.87

D;D;D;.;.

Eigen

Pathogenic

0.86

Eigen_PC

Pathogenic

0.79

FATHMM_MKL

Pathogenic

0.99

M_CAP

Pathogenic

0.36

MetaRNN

Pathogenic

0.90

D;D;D;D;D

MetaSVM

Pathogenic

0.97

MutationAssessor

Pathogenic

3.2

M;M;.;.;.

MutationTaster

Benign

1.0

A;A;A;A

PrimateAI

Uncertain

0.71

PROVEAN

Pathogenic

-4.4

D;D;D;D;D

REVEL

Pathogenic

0.91

Sift

Pathogenic

0.0

D;D;D;D;D

Sift4G

Uncertain

0.0020

D;D;D;D;D

Polyphen

1.0

D;D;D;.;D

Vest4

0.99

MVP

0.98

MPC

1.1

ClinPred

0.98

GERP RS

4.6

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.74

gMVP

0.88

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