21-25592951-A-G

Variant summary

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

The NM_017446.4(MRPL39):c.782T>C(p.Ile261Thr) variant causes a missense change. The variant allele was found at a frequency of 0.0000652 in 1,611,624 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000068 ( 0 hom. )

Consequence

MRPL39
NM_017446.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 6.08

Variant links:

Genes affected

MRPL39 (HGNC:14027): (mitochondrial ribosomal protein L39) 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. Two transcript variants encoding distinct isoforms have been described. A pseudogene corresponding to this gene is found on chromosome 5q. [provided by RefSeq, Jul 2008]

MRPL39 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/exons	MANE
MRPL39	NM_017446.4 linkuse as main transcript	c.782T>C	p.Ile261Thr	missense_variant	8/10	ENST00000352957.9
MRPL39	NM_080794.4 linkuse as main transcript	c.782T>C	p.Ile261Thr	missense_variant	8/11
MRPL39	XM_006724026.5 linkuse as main transcript	c.782T>C	p.Ile261Thr	missense_variant	8/10
MRPL39	XM_011529651.3 linkuse as main transcript	c.656T>C	p.Ile219Thr	missense_variant	8/10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MRPL39	ENST00000352957.9 linkuse as main transcript	c.782T>C	p.Ile261Thr	missense_variant	8/10	1	NM_017446.4	P1	Q9NYK5-1
MRPL39	ENST00000307301.11 linkuse as main transcript	c.782T>C	p.Ile261Thr	missense_variant	8/11	5			Q9NYK5-2
MRPL39	ENST00000419219.1 linkuse as main transcript	c.752T>C	p.Ile251Thr	missense_variant	8/8	5

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152200

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:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000735

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000282

AC:

AN:

248272

Hom.:

AF XY:

0.0000298

AC XY:

AN XY:

134146

show subpopulations

Gnomad AFR exome

AF:

0.000123

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000336

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000355

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000678

AC:

AN:

1459424

Hom.:

Cov.:

AF XY:

0.0000634

AC XY:

AN XY:

726000

show subpopulations

Gnomad4 AFR exome

AF:

0.0000300

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.0000233

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000846

Gnomad4 OTH exome

AF:

0.0000332

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152200

Hom.:

Cov.:

AF XY:

0.0000672

AC XY:

AN XY:

74358

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:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000735

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000847

Hom.:

Bravo

AF:

0.0000227

ESP6500AA

AF:

0.000227

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000247

AC:

EpiCase

AF:

0.0000547

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jun 13, 2023

The c.782T>C (p.I261T) alteration is located in exon 8 (coding exon 8) of the MRPL39 gene. This alteration results from a T to C substitution at nucleotide position 782, causing the isoleucine (I) at amino acid position 261 to be replaced by a threonine (T). 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

Benign

0.16

BayesDel_addAF

Benign

-0.10

BayesDel_noAF

Benign

-0.20

Cadd

Pathogenic

Dann

Uncertain

0.99

DEOGEN2

Benign

0.19

T;.;T

Eigen

Uncertain

0.57

Eigen_PC

Uncertain

0.60

FATHMM_MKL

Pathogenic

0.99

LIST_S2

Uncertain

0.87

D;D;D

M_CAP

Benign

0.015

MetaRNN

Uncertain

0.44

T;T;T

MetaSVM

Benign

-0.69

MutationAssessor

Benign

2.0

M;M;.

MutationTaster

Benign

1.0

D;D

PrimateAI

Uncertain

0.56

PROVEAN

Uncertain

-3.5

D;D;D

REVEL

Uncertain

0.31

Sift

Uncertain

0.0020

D;D;D

Sift4G

Uncertain

0.0080

D;D;D

Polyphen

0.97

D;D;.

Vest4

0.63

MVP

0.78

MPC

0.054

ClinPred

0.65

GERP RS

5.4

Varity_R

0.61

gMVP

0.70

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

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