16-1773026-G-T

Position:

• chr16-1773026-G-T

Variant summary

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

The NM_023936.2(MRPS34):​c.94C>A​(p.Gln32Lys) 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. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 35)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: MRPS34 NM_023936.2 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.45

Genes affected

MRPS34 (HGNC:16618): (mitochondrial ribosomal protein S34) 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. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Jul 2014]

EME2 (HGNC:27289): (essential meiotic structure-specific endonuclease subunit 2) EME2 forms a heterodimer with MUS81 (MIM 606591) that functions as an XPF (MIM 278760)-type flap/fork endonuclease in DNA repair (Ciccia et al., 2007 [PubMed 17289582]).[supplied by OMIM, Mar 2008]

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=0.14972982).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MRPS34	NM_023936.2	c.94C>A	p.Gln32Lys	missense_variant	1/3	ENST00000397375.7	NP_076425.1
EME2	NM_001257370.2	c.-202G>T		5_prime_UTR_variant	1/8	ENST00000568449.7	NP_001244299.1
MRPS34	NM_001300900.2	c.94C>A	p.Gln32Lys	missense_variant	1/3		NP_001287829.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MRPS34	ENST00000397375.7	c.94C>A	p.Gln32Lys	missense_variant	1/3	1	NM_023936.2	ENSP00000380531	P1
MRPS34	ENST00000177742.7	c.94C>A	p.Gln32Lys	missense_variant	1/3	1		ENSP00000177742
EME2	ENST00000568449.7	c.-202G>T		5_prime_UTR_variant	1/8	1	NM_001257370.2	ENSP00000457353	P1

Frequencies

GnomAD3 genomes Cov.: 35

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1290102 Hom.: 0 Cov.: 61 AF XY: 0.00 AC XY: 0 AN XY: 629498

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 35

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.22
BayesDel_addAF	Benign	-0.10	T
BayesDel_noAF	Benign	-0.39
CADD	Benign	21
DANN	Benign	0.97
DEOGEN2	Benign	0.096	T;T
Eigen	Benign	-0.29
Eigen_PC	Benign	-0.27
FATHMM_MKL	Benign	0.54	D
LIST_S2	Uncertain	0.88	D;D
M_CAP	Pathogenic	0.36	D
MetaRNN	Benign	0.15	T;T
MetaSVM	Benign	-0.90	T
MutationAssessor	Uncertain	2.1	.;M
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.83	D
PROVEAN	Benign	-0.75	N;N
REVEL	Benign	0.046
Sift	Uncertain	0.018	D;D
Sift4G	Uncertain	0.047	D;D
Polyphen		0.29	B;B
Vest4		0.48
MutPred		0.24		Gain of ubiquitination at Q32 (P = 0.0094);Gain of ubiquitination at Q32 (P = 0.0094);
MVP		0.18
MPC		1.9
ClinPred		0.62	D
GERP RS		1.5
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.0
Varity_R		0.37
gMVP		0.78

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

Other links and lift over

dbSNP: rs763672163; hg19: chr16-1823027;