10-73250931-C-T

Variant names:

• chr10-73250931-C-T
• NM_016065.4:c.335G>A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_016065.4(MRPS16):​c.335G>A​(p.Arg112Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: MRPS16 NM_016065.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 2.65

Genes affected

MRPS16 (HGNC:14048): (mitochondrial ribosomal protein S16) 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 belongs to the ribosomal protein S16P family. The encoded protein is one of the most highly conserved ribosomal proteins between mammalian and yeast mitochondria. Three pseudogenes (located at 8q21.3, 20q13.32, 22q12-q13.1) for this gene have been described. [provided by RefSeq, Jul 2008]

DNAJC9-AS1 (HGNC:31432): (DNAJC9 and MRPS16 antisense RNA 1)

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.16070327).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MRPS16	NM_016065.4	c.335G>A	p.Arg112Lys	missense_variant	Exon 3 of 3	ENST00000372945.8	NP_057149.1
MRPS16	XM_047425263.1	c.329G>A	p.Arg110Lys	missense_variant	Exon 3 of 3		XP_047281219.1
MRPS16	NM_001410935.1	c.274+832G>A		intron_variant	Intron 2 of 2		NP_001397864.1
DNAJC9-AS1	NR_038373.1	n.175+2481C>T		intron_variant	Intron 2 of 3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MRPS16	ENST00000372945.8	c.335G>A	p.Arg112Lys	missense_variant	Exon 3 of 3	1	NM_016065.4	ENSP00000362036.3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Feb 09, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.335G>A (p.R112K) alteration is located in exon 3 (coding exon 3) of the MRPS16 gene. This alteration results from a G to A substitution at nucleotide position 335, causing the arginine (R) at amino acid position 112 to be replaced by a lysine (K). 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	0.12
BayesDel_addAF	Benign	-0.079	T
BayesDel_noAF	Benign	-0.35
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Benign	0.0046	T
Eigen	Benign	-0.11
Eigen_PC	Benign	0.077
FATHMM_MKL	Uncertain	0.76	D
LIST_S2	Benign	0.61	T
M_CAP	Benign	0.0056	T
MetaRNN	Benign	0.16	T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	2.0	M
PrimateAI	Uncertain	0.53	T
PROVEAN	Benign	-0.97	N
REVEL	Benign	0.11
Sift	Benign	0.26	T
Sift4G	Benign	0.31	T
Polyphen		0.13	B
Vest4		0.18
MutPred		0.38		Loss of stability (P = 0.04);
MVP		0.64
MPC		0.18
ClinPred		0.61	D
GERP RS		5.7
Varity_R		0.15
gMVP		0.49

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

No publications associated with this variant yet.

Other links and lift over

hg19: chr10-75010689;