Genetic Variant MRPL3:p.Cys295Ser (chr3-131468101-C-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_007208.4(MRPL3):c.884G>C(p.Cys295Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00000783 in 1,405,480 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as not provided (no stars).

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000078 ( 0 hom. )

Consequence

MRPL3
NM_007208.4 missense

Scores

Clinical Significance

not provided no classification provided O:1

Conservation

PhyloP100: 6.94

Variant links:

Genes affected

MRPL3 (HGNC:10379): (mitochondrial ribosomal protein L3) 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 39S subunit protein that belongs to the L3P ribosomal protein family. A pseudogene corresponding to this gene is found on chromosome 13q. [provided by RefSeq, Jul 2008]

MRPL3 links:

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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
MRPL3	NM_007208.4 link	c.884G>C	p.Cys295Ser	missense_variant	Exon 9 of 10	ENST00000264995.8	NP_009139.1	P09001

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
MRPL3	ENST00000264995.8 link	c.884G>C	p.Cys295Ser	missense_variant	Exon 9 of 10	1	NM_007208.4	ENSP00000264995.2	P09001
MRPL3	ENST00000425847.6 link	c.965G>C	p.Cys322Ser	missense_variant	Exon 10 of 11	2		ENSP00000398536.2	E7ETU7
MRPL3	ENST00000511168.5 link	c.926G>C	p.Cys309Ser	missense_variant	Exon 9 of 10	2		ENSP00000424107.1	H0Y9G6
MRPL3	ENST00000510043.1 link	n.308G>C		non_coding_transcript_exon_variant	Exon 3 of 4	2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000936

AC:

AN:

213712

Hom.:

AF XY:

0.00000859

AC XY:

AN XY:

116358

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:

0.0000197

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000783

AC:

AN:

1405480

Hom.:

Cov.:

AF XY:

0.00000858

AC XY:

AN XY:

699534

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.0000285

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:

0.00000922

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000868

Hom.:

Bravo

AF:

0.0000189

ExAC

AF:

0.00000824

AC:

ClinVar

Significance: not provided

Submissions summary: Other:1

Revision: no classification provided

LINK: link

Submissions by phenotype

Combined oxidative phosphorylation defect type 9

Other:1

GenomeConnect, ClinGen

Significance: not provided

Review Status: no classification provided

Collection Method: phenotyping only

GenomeConnect assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. GenomeConnect staff make no attempt to reinterpret the clinical significance of the variant. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Benign

-0.060

BayesDel_noAF

Benign

-0.32

CADD

Benign

DANN

Benign

0.26

DEOGEN2

Benign

0.026

T;T

Eigen

Uncertain

0.20

Eigen_PC

Uncertain

0.31

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.89

D;D

M_CAP

Benign

0.0096

MetaRNN

Uncertain

0.55

D;D

MetaSVM

Benign

-0.94

MutationAssessor

Benign

0.58

N;.

PrimateAI

Uncertain

0.64

PROVEAN

Benign

-1.3

N;N

REVEL

Benign

0.18

Sift

Benign

1.0

T;T

Sift4G

Benign

1.0

T;T

Polyphen

0.019

B;B

Vest4

0.64

MutPred

0.57

.;Gain of disorder (P = 2e-04);

MVP

0.71

MPC

0.12

ClinPred

0.21

GERP RS

5.7

Varity_R

0.51

gMVP

0.70

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