chr3-158644650-G-C

Position:

• chr3-158644650-G-C

Variant summary

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

The NM_024996.7(GFM1):​c.16G>C​(p.Ala6Pro) 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. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. A6A) has been classified as Benign.

• Frequency: Genomes: not found (cov: 33)
• Consequence: GFM1 NM_024996.7 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: -0.441

Genes affected

GFM1 (HGNC:13780): (G elongation factor mitochondrial 1) Eukaryotes contain two protein translational systems, one in the cytoplasm and one in the mitochondria. Mitochondrial translation is crucial for maintaining mitochondrial function and mutations in this system lead to a breakdown in the respiratory chain-oxidative phosphorylation system and to impaired maintenance of mitochondrial DNA. This gene encodes one of the mitochondrial translation elongation factors. Its role in the regulation of normal mitochondrial function and in different disease states attributed to mitochondrial dysfunction is not known. [provided by RefSeq, Jul 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=0.08562189).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
GFM1	NM_024996.7	c.16G>C	p.Ala6Pro	missense_variant	1/18	ENST00000486715.6	NP_079272.4

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
GFM1	ENST00000486715.6	c.16G>C	p.Ala6Pro	missense_variant	1/18	1	NM_024996.7	ENSP00000419038	P1
GFM1	ENST00000264263.9	c.16G>C	p.Ala6Pro	missense_variant	1/19	5		ENSP00000264263
GFM1	ENST00000478576.5	c.16G>C	p.Ala6Pro	missense_variant	1/14	2		ENSP00000418755
GFM1	ENST00000478254.5	c.16G>C	p.Ala6Pro	missense_variant, NMD_transcript_variant	1/18	5		ENSP00000417225

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 30

GnomAD4 genome Cov.: 33

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

GeneDx

Sep 15, 2014

p.Ala6Pro (GCT>CCT): c.16 G>C in exon 1 of the GFM1 gene (NM_024996.5). The A6P variant has not been published as a mutation, nor has it been reported as a benign polymorphism to our knowledge. The A6P variant is a semi-conservative amino acid substitution, which may impact secondary protein structure as these residues differ in some properties. This substitution occurs at a position that is not conserved across species and in silico analysis is inconsistent in its predictions as to whether or not the variant is damaging to the protein structure/function. Therefore, based on the currently available information, it is unclear whether this variant is a pathogenic mutation or a rare benign variant. The variant is found in MITONUC-MITOP panel(s). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.15
BayesDel_addAF	Benign	-0.098	T
BayesDel_noAF	Benign	-0.38
CADD	Benign	9.3
DANN	Benign	0.84
DEOGEN2	Benign	0.030	T;T;.
Eigen	Benign	-1.5
Eigen_PC	Benign	-1.6
FATHMM_MKL	Benign	0.22	N
LIST_S2	Benign	0.68	T;T;T
M_CAP	Uncertain	0.087	D
MetaRNN	Benign	0.086	T;T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	0.81	L;.;L
MutationTaster	Benign	1.0	N;N;N
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	-0.34	N;N;N
REVEL	Benign	0.072
Sift	Benign	0.077	T;T;T
Sift4G	Benign	0.12	T;T;T
Polyphen		0.38	B;B;.
Vest4		0.31
MutPred		0.46		Loss of helix (P = 0.0123);Loss of helix (P = 0.0123);Loss of helix (P = 0.0123);
MVP		0.061
MPC		0.29
ClinPred		0.15	T
GERP RS		-0.57
Varity_R		0.098
gMVP		0.88

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: rs863224031; hg19: chr3-158362439;