rs1023202749

Positions:

• chr5-127396700-G-A

Variant summary

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

The NM_001256545.2(MEGF10):​c.581G>A​(p.Arg194Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,788 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: MEGF10 NM_001256545.2 missense
• Clinical Significance: Uncertain significance criteria provided, multiple submitters, no conflicts U:2
• Conservation: PhyloP100: 1.82

Genes affected

MEGF10 (HGNC:29634): (multiple EGF like domains 10) This gene encodes a member of the multiple epidermal growth factor-like domains protein family. The encoded protein plays a role in cell adhesion, motility and proliferation, and is a critical mediator of apoptotic cell phagocytosis as well as amyloid-beta peptide uptake in the brain. Expression of this gene may be associated with schizophrenia, and mutations in this gene are a cause of early-onset myopathy, areflexia, respiratory distress, and dysphagia (EMARDD) as well as congenital myopathy with minicores. Alternatively spliced transcript variants have been observed for this gene. [provided by RefSeq, Apr 2012]

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=0.107016236).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MEGF10	NM_001256545.2	c.581G>A	p.Arg194Lys	missense_variant	6/25	ENST00000503335.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MEGF10	ENST00000503335.7	c.581G>A	p.Arg194Lys	missense_variant	6/25	1	NM_001256545.2	P1
MEGF10	ENST00000274473.6	c.581G>A	p.Arg194Lys	missense_variant	7/26	1		P1
MEGF10	ENST00000418761.6	c.581G>A	p.Arg194Lys	missense_variant	7/15	1
MEGF10	ENST00000508365.5	c.581G>A	p.Arg194Lys	missense_variant	6/14	1

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461788 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727202

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: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

MEGF10-related myopathy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Aug 27, 2021

This sequence change replaces arginine with lysine at codon 194 of the MEGF10 protein (p.Arg194Lys). The arginine residue is moderately conserved and there is a small physicochemical difference between arginine and lysine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals affected with MEGF10-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The lysine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Revvity Omics, Revvity

Nov 05, 2021

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.061
BayesDel_addAF	Benign	-0.25	T
BayesDel_noAF	Benign	-0.60
CADD	Benign	14
DANN	Benign	0.88
DEOGEN2	Benign	0.011	T;.;.;T
Eigen	Benign	-0.80
Eigen_PC	Benign	-0.59
FATHMM_MKL	Benign	0.68	D
LIST_S2	Benign	0.46	.;.;T;T
M_CAP	Benign	0.0031	T
MetaRNN	Benign	0.11	T;T;T;T
MetaSVM	Benign	-0.97	T
MutationAssessor	Benign	-0.43	N;N;N;N
MutationTaster	Benign	0.95	N;N;N;N
PrimateAI	Benign	0.45	T
PROVEAN	Benign	0.29	N;N;N;N
REVEL	Benign	0.034
Sift	Benign	1.0	T;T;T;T
Sift4G	Benign	0.83	T;T;T;T
Polyphen		0.0	B;B;B;B
Vest4		0.18
MutPred		0.52		Gain of methylation at R194 (P = 7e-04);Gain of methylation at R194 (P = 7e-04);Gain of methylation at R194 (P = 7e-04);Gain of methylation at R194 (P = 7e-04);
MVP		0.068
MPC		0.23
ClinPred		0.057	T
GERP RS		1.1
Varity_R		0.040
gMVP		0.20

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: rs1023202749; hg19: chr5-126732392;