19-42326311-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_001271938.2(MEGF8):c.68C>T(p.Pro23Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000567 in 1,411,184 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 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: 0.0000057 ( 0 hom. )

Consequence

MEGF8
NM_001271938.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 0.768

Variant links:

Genes affected

MEGF8 (HGNC:3233): (multiple EGF like domains 8) The protein encoded by this gene is a single-pass type I membrane protein of unknown function that contains several EGF-like domains, Kelch repeats, and PSI domains. Defects in this gene are a cause of Carpenter syndrome 2. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Dec 2012]

MEGF8 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.06867224).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MEGF8	NM_001271938.2 linkuse as main transcript	c.68C>T	p.Pro23Leu	missense_variant	1/42	ENST00000251268.11
MEGF8	NM_001410.3 linkuse as main transcript	c.68C>T	p.Pro23Leu	missense_variant	1/41

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MEGF8	ENST00000251268.11 linkuse as main transcript	c.68C>T	p.Pro23Leu	missense_variant	1/42	5	NM_001271938.2	A2	Q7Z7M0-1
MEGF8	ENST00000334370.8 linkuse as main transcript	c.68C>T	p.Pro23Leu	missense_variant	1/41	1		P2	Q7Z7M0-2
MEGF8	ENST00000378073.5 linkuse as main transcript	c.-7018C>T		5_prime_UTR_variant	1/41	5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000359

AC:

AN:

194944

Hom.:

AF XY:

0.00000918

AC XY:

AN XY:

108936

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000327

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000567

AC:

AN:

1411184

Hom.:

Cov.:

AF XY:

0.00000285

AC XY:

AN XY:

702170

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000218

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.0000190

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

Cov.:

Bravo

AF:

0.00000756

ExAC

AF:

0.0000332

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

MEGF8-related Carpenter syndrome

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Sep 28, 2022

This sequence change replaces proline, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 23 of the MEGF8 protein (p.Pro23Leu). This variant is present in population databases (rs774347513, gnomAD 0.03%). This variant has not been reported in the literature in individuals affected with MEGF8-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Tolerated"; PolyPhen-2: "Not Available"; Align-GVGD: "Class C0". The leucine 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.082

BayesDel_addAF

Benign

-0.46

BayesDel_noAF

Benign

-0.59

Cadd

Benign

Dann

Uncertain

0.99

Eigen

Benign

-0.44

Eigen_PC

Benign

-0.47

FATHMM_MKL

Benign

0.055

LIST_S2

Benign

0.74

T;T

M_CAP

Benign

0.021

MetaRNN

Benign

0.069

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.69

N;N

MutationTaster

Benign

1.0

N;N

PrimateAI

Uncertain

0.50

PROVEAN

Benign

-1.5

N;N

REVEL

Benign

0.064

Sift

Benign

0.18

T;T

Sift4G

Benign

0.43

T;T

Polyphen

0.78

P;.

Vest4

0.10

MutPred

0.48

Loss of relative solvent accessibility (P = 0.0186);Loss of relative solvent accessibility (P = 0.0186);

MVP

0.093

MPC

0.39

ClinPred

0.12

GERP RS

3.3

Varity_R

0.046

gMVP

0.21

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over