16-85799139-G-A

Variant summary

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

The NM_006067.5(EMC8):c.157C>T(p.Leu53Phe) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: EMC8 NM_006067.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.81

Genes affected

EMC8 (HGNC:7864): (ER membrane protein complex subunit 8) Contributes to membrane insertase activity. Involved in protein insertion into ER membrane by stop-transfer membrane-anchor sequence and tail-anchored membrane protein insertion into ER membrane. Located in cytosol. Part of EMC complex. [provided by Alliance of Genome Resources, Apr 2022]

COX4I1 (HGNC:2265): (cytochrome c oxidase subunit 4I1) Cytochrome c oxidase (COX) is the terminal enzyme of the mitochondrial respiratory chain. It is a multi-subunit enzyme complex that couples the transfer of electrons from cytochrome c to molecular oxygen and contributes to a proton electrochemical gradient across the inner mitochondrial membrane. The complex consists of 13 mitochondrial- and nuclear-encoded subunits. The mitochondrially-encoded subunits perform the electron transfer and proton pumping activities. The functions of the nuclear-encoded subunits are unknown but they may play a role in the regulation and assembly of the complex. This gene encodes the nuclear-encoded subunit IV isoform 1 of the human mitochondrial respiratory chain enzyme. It is located at the 3' of the NOC4 (neighbor of COX4) gene in a head-to-head orientation, and shares a promoter with it. Pseudogenes related to this gene are located on chromosomes 13 and 14. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Jan 2016]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
EMC8	NM_006067.5	c.157C>T	p.Leu53Phe	missense_variant	1/5	ENST00000253457.8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
EMC8	ENST00000253457.8	c.157C>T	p.Leu53Phe	missense_variant	1/5	1	NM_006067.5	P1
EMC8	ENST00000435200.2	c.157C>T	p.Leu53Phe	missense_variant	1/4	2
COX4I1	ENST00000565078.5	c.-2+71G>A		intron_variant		4
EMC8	ENST00000596852.1	n.258C>T		non_coding_transcript_exon_variant	1/2	2

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

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 26, 2022

The c.157C>T (p.L53F) alteration is located in exon 1 (coding exon 1) of the EMC8 gene. This alteration results from a C to T substitution at nucleotide position 157, causing the leucine (L) at amino acid position 53 to be replaced by a phenylalanine (F). 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	0.26
BayesDel_addAF	Uncertain	0.15	D
BayesDel_noAF	Uncertain	-0.020
Cadd	Pathogenic	27
Dann	Uncertain	1.0
DEOGEN2	Benign	0.046	T;.
Eigen	Uncertain	0.63
Eigen_PC	Uncertain	0.62
FATHMM_MKL	Uncertain	0.85	D
LIST_S2	Benign	0.81	T;T
M_CAP	Benign	0.056	D
MetaRNN	Uncertain	0.72	D;D
MetaSVM	Benign	-0.72	T
MutationAssessor	Uncertain	2.7	M;M
MutationTaster	Benign	1.0	D;D
PrimateAI	Uncertain	0.69	T
PROVEAN	Benign	-0.71	N;N
REVEL	Uncertain	0.35
Sift	Benign	0.35	T;T
Sift4G	Benign	0.45	T;T
Polyphen		1.0	D;.
Vest4		0.64
MutPred		0.52		Loss of stability (P = 0.0613);Loss of stability (P = 0.0613);
MVP		0.54
MPC		0.81
ClinPred		0.98	D
GERP RS		5.3
Varity_R		0.43
gMVP		0.45

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: chr16-85832745;