13-41252975-T-G

Position:

• chr13-41252975-T-G

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_004294.4(MTRF1):​c.563A>C​(p.Glu188Ala) variant causes a missense change. The variant allele was found at a frequency of 0.00000206 in 1,455,056 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic 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: 0.0000021 (0 hom.)
• Consequence: MTRF1 NM_004294.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 6.96

Genes affected

MTRF1 (HGNC:7469): (mitochondrial translation release factor 1) The protein encoded by this gene was determined by in silico methods to be a mitochondrial protein with similarity to the peptide chain release factors (RFs) discovered in bacteria and yeast. The peptide chain release factors direct the termination of translation in response to the peptide chain termination codons. Initially thought to have a role in the termination of mitochondria protein synthesis, a recent publication found no mitochondrial translation release functionality. Multiple alternatively spliced transcript variants have been suggested by mRNA and EST data; however, their full-length natures are not clear. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.927

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MTRF1	NM_004294.4	c.563A>C	p.Glu188Ala	missense_variant	4/10	ENST00000379480.9	NP_004285.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MTRF1	ENST00000379480.9	c.563A>C	p.Glu188Ala	missense_variant	4/10	1	NM_004294.4	ENSP00000368793.3
MTRF1	ENST00000497679.6	n.*226A>C		non_coding_transcript_exon_variant	5/6	3		ENSP00000484414.1
MTRF1	ENST00000497679.6	n.*226A>C		3_prime_UTR_variant	5/6	3		ENSP00000484414.1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 0.00000206 AC: 3 AN: 1455056 Hom.: 0 Cov.: 30 AF XY: 0.00000276 AC XY: 2 AN XY: 723582

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: 0.00000270

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not specified Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Oct 11, 2024

The c.563A>C (p.E188A) alteration is located in exon 4 (coding exon 3) of the MTRF1 gene. This alteration results from a A to C substitution at nucleotide position 563, causing the glutamic acid (E) at amino acid position 188 to be replaced by an alanine (A). 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	Pathogenic	0.92
BayesDel_addAF	Pathogenic	0.33	D
BayesDel_noAF	Pathogenic	0.23
CADD	Pathogenic	27
DANN	Uncertain	1.0
DEOGEN2	Benign	0.12	T;T;D;T
Eigen	Pathogenic	0.97
Eigen_PC	Pathogenic	0.89
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Pathogenic	0.98	.;D;D;D
M_CAP	Benign	0.066	D
MetaRNN	Pathogenic	0.93	D;D;D;D
MetaSVM	Uncertain	0.30	D
MutationAssessor	Pathogenic	4.6	H;H;.;.
PrimateAI	Uncertain	0.70	T
PROVEAN	Pathogenic	-5.7	D;D;.;D
REVEL	Uncertain	0.64
Sift	Pathogenic	0.0	D;D;.;D
Sift4G	Pathogenic	0.0	D;D;D;D
Polyphen		1.0	D;D;.;.
Vest4		0.94
MutPred		0.86		Gain of methylation at R193 (P = 0.0953);Gain of methylation at R193 (P = 0.0953);.;Gain of methylation at R193 (P = 0.0953);
MVP		0.88
MPC		0.60
ClinPred		1.0	D
GERP RS		5.9
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.83
gMVP		0.77

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: rs759314201; hg19: chr13-41827111;