Genetic Variant MRPL46:p.Arg97Gly (chr15-88465713-G-C) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_022163.4(MRPL46):c.289C>G(p.Arg97Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,364 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

MRPL46
NM_022163.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 0.546

Publications

0 publications found

Variant links:

Genes affected

MRPL46 (HGNC:1192): (mitochondrial ribosomal protein L46) 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. [provided by RefSeq, Jul 2008]

MRPL46 links:

ENSG00000173867 (HGNC:):

ENSG00000173867 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.20571592).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MRPL46	NM_022163.4 link	c.289C>G	p.Arg97Gly	missense_variant	Exon 2 of 4	ENST00000312475.5	NP_071446.2	Q9H2W6

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MRPL46	ENST00000312475.5 link	c.289C>G	p.Arg97Gly	missense_variant	Exon 2 of 4	1	NM_022163.4	ENSP00000312311.4		Q9H2W6
ENSG00000173867	ENST00000649547.1 link	c.*816C>G		3_prime_UTR_variant	Exon 8 of 10			ENSP00000497509.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461364

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727006

show subpopulations

⚠️ The allele balance in gnomAD version 4 Exomes is significantly skewed from the expected value of 0.5.

African (AFR)

AF:

0.00

AC:

AN:

33434

American (AMR)

AF:

0.00

AC:

AN:

44644

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26128

East Asian (EAS)

AF:

0.00

AC:

AN:

39676

South Asian (SAS)

AF:

0.00

AC:

AN:

86194

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53264

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111890

Other (OTH)

AF:

0.00

AC:

AN:

60366

⚠️ The allele balance in gnomAD4 Exomes is highly skewed from 0.5 (p-value = 0), which strongly suggests a high chance of mosaicism in these individuals.

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.375

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.17

BayesDel_addAF

Benign

-0.083

BayesDel_noAF

Benign

-0.36

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Benign

0.036

T;.

Eigen

Benign

-0.34

Eigen_PC

Benign

-0.56

FATHMM_MKL

Benign

0.33

LIST_S2

Benign

0.74

T;T

M_CAP

Benign

0.014

MetaRNN

Benign

0.21

T;T

MetaSVM

Benign

-0.75

MutationAssessor

Uncertain

2.8

M;.

PhyloP100

0.55

PrimateAI

Benign

0.24

PROVEAN

Uncertain

-4.1

D;.

REVEL

Benign

0.15

Sift

Uncertain

0.0040

D;.

Sift4G

Uncertain

0.011

D;D

Polyphen

0.98

D;.

Vest4

0.22

MutPred

0.45

Gain of ubiquitination at K102 (P = 0.0606);Gain of ubiquitination at K102 (P = 0.0606);

MVP

0.37

MPC

0.13

ClinPred

0.99

GERP RS

-1.0

Varity_R

0.81

gMVP

0.56

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over