22-39511344-G-A

Position:

• chr22-39511344-G-A

Variant summary

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

The ENST00000325301.7(MIEF1):​c.50G>A​(p.Gly17Asp) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 33)
• Consequence: MIEF1 ENST00000325301.7 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.56

Genes affected

MIEF1 (HGNC:25979): (mitochondrial elongation factor 1) Enables ADP binding activity; GDP binding activity; and identical protein binding activity. Involved in several processes, including positive regulation of mitochondrial fission; positive regulation of mitochondrial translation; and positive regulation of protein targeting to membrane. Located in mitochondrial matrix and mitochondrial outer membrane. Colocalizes with mitochondrial large ribosomal subunit. [provided by Alliance of Genome Resources, Apr 2022]

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, 0.891

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MIEF1	NM_019008.6	c.50G>A	p.Gly17Asp	missense_variant	3/6	ENST00000325301.7	NP_061881.2
MIEF1	NM_001304564.2	c.50G>A	p.Gly17Asp	missense_variant	3/7		NP_001291493.1
MIEF1	NR_130789.2	n.537G>A		non_coding_transcript_exon_variant	3/6
MIEF1	NR_130790.2	n.687G>A		non_coding_transcript_exon_variant	4/7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MIEF1	ENST00000325301.7	c.50G>A	p.Gly17Asp	missense_variant	3/6	1	NM_019008.6	ENSP00000327124	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

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

Sep 20, 2023

The c.50G>A (p.G17D) alteration is located in exon 3 (coding exon 1) of the MIEF1 gene. This alteration results from a G to A substitution at nucleotide position 50, causing the glycine (G) at amino acid position 17 to be replaced by an aspartic acid (D). 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	0.88
BayesDel_addAF	Pathogenic	0.35	D
BayesDel_noAF	Pathogenic	0.26
CADD	Pathogenic	28
DANN	Uncertain	1.0
DEOGEN2	Benign	0.31	T;T;T;.
Eigen	Pathogenic	0.83
Eigen_PC	Pathogenic	0.79
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.93	D;.;D;D
M_CAP	Uncertain	0.19	D
MetaRNN	Pathogenic	0.89	D;D;D;D
MetaSVM	Uncertain	-0.19	T
MutationAssessor	Uncertain	2.5	.;M;M;.
MutationTaster	Benign	1.0	D;D;D
PrimateAI	Pathogenic	0.93	D
PROVEAN	Uncertain	-2.9	D;D;D;D
REVEL	Pathogenic	0.66
Sift	Uncertain	0.0020	D;D;D;D
Sift4G	Uncertain	0.0040	D;D;D;D
Polyphen		1.0	D;D;D;.
Vest4		0.97
MutPred		0.77		Gain of catalytic residue at G17 (P = 0.0255);Gain of catalytic residue at G17 (P = 0.0255);Gain of catalytic residue at G17 (P = 0.0255);Gain of catalytic residue at G17 (P = 0.0255);
MVP		0.82
MPC		1.3
ClinPred		0.98	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.78
gMVP		0.83

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: rs1930321779; hg19: chr22-39907349;