Genetic Variant MRPS28:c.214-8A>G (chr8-80003188-T-C) – ACMG Classification: Likely_benign (-3 pts)

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 2P and 5B. PM2BP4_StrongBP6

The NM_014018.3(MRPS28):c.214-8A>G variant causes a splice region, intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000252 in 1,558,786 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 3/3 splice prediction tools predict no significant impact on normal splicing. Variant has been reported in ClinVar as Likely benign (no stars).

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00027 ( 0 hom. )

Consequence

MRPS28
NM_014018.3 splice_region, intron

Scores

Splicing: ADA: 0.00002523

Clinical Significance

Likely benign no assertion criteria provided B:1

Conservation

PhyloP100: 0.0340

Variant links:

Genes affected

MRPS28 (HGNC:14513): (mitochondrial ribosomal protein S28) 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 has been called mitochondrial ribosomal protein S35 in the literature. [provided by RefSeq, Jul 2008]

MRPS28 links:

ENSG00000276418 (HGNC:):

ENSG00000276418 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.77).

BP6

Variant 8-80003188-T-C is Benign according to our data. Variant chr8-80003188-T-C is described in ClinVar as [Likely_benign]. Clinvar id is 3042346.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MRPS28	NM_014018.3 link	c.214-8A>G		splice_region_variant, intron_variant	Intron 1 of 2	ENST00000276585.9	NP_054737.1	Q9Y2Q9A0A0S2Z563
TPD52-MRPS28	NM_001387778.1 link	c.436-8A>G		splice_region_variant, intron_variant	Intron 5 of 6		NP_001374707.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MRPS28	ENST00000276585.9 link	c.214-8A>G		splice_region_variant, intron_variant	Intron 1 of 2	1	NM_014018.3	ENSP00000276585.4		Q9Y2Q9
ENSG00000276418	ENST00000522938.5 link	n.556-8A>G		splice_region_variant, intron_variant	Intron 5 of 7	2		ENSP00000430858.2		H0YC42

Frequencies

GnomAD3 genomes

AF:

0.000112

AC:

AN:

152194

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000483

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000654

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:

0.000206

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000183

AC:

AN:

201782

Hom.:

AF XY:

0.000210

AC XY:

AN XY:

109278

show subpopulations

Gnomad AFR exome

AF:

0.000135

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:

0.000359

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.000267

AC:

376

AN:

1406592

Hom.:

Cov.:

AF XY:

0.000269

AC XY:

188

AN XY:

698250

show subpopulations

Gnomad4 AFR exome

AF:

0.000129

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000394

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.000331

Gnomad4 OTH exome

AF:

0.000138

GnomAD4 genome

AF:

0.000112

AC:

AN:

152194

Hom.:

Cov.:

AF XY:

0.000121

AC XY:

AN XY:

74354

show subpopulations

Gnomad4 AFR

AF:

0.0000483

Gnomad4 AMR

AF:

0.0000654

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000206

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000609

Hom.:

Bravo

AF:

0.0000982

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

MRPS28-related disorder

Benign:1

Feb 28, 2022

PreventionGenetics, part of Exact Sciences

Significance: Likely benign

Review Status: no assertion criteria provided

Collection Method: clinical testing

This variant is classified as likely benign based on ACMG/AMP sequence variant interpretation guidelines (Richards et al. 2015 PMID: 25741868, with internal and published modifications). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.77

CADD

Benign

7.0

DANN

Benign

0.69

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000025

dbscSNV1_RF

Benign

0.0020

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