Genetic Variant MEGF8:p.Pro109Gln (chr19-42333743-C-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. The variant received -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001271938.2(MEGF8):c.326C>A(p.Pro109Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000342 in 1,461,626 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/22 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. P109L) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000034 ( 0 hom. )

Consequence

MEGF8
NM_001271938.2 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 2.34

Publications

1 publications found

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 Gene-Disease associations (from GenCC):

MEGF8-related Carpenter syndrome
Inheritance: AR Classification: DEFINITIVE, STRONG, MODERATE Submitted by: PanelApp Australia, G2P, Ambry Genetics, ClinGen, Labcorp Genetics (formerly Invitae)
Carpenter syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

MEGF8 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Likely_benign. The variant received -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.047110796).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MEGF8	NM_001271938.2 link	c.326C>A	p.Pro109Gln	missense_variant	Exon 2 of 42	ENST00000251268.11	NP_001258867.1
MEGF8	NM_001410.3 link	c.326C>A	p.Pro109Gln	missense_variant	Exon 2 of 41		NP_001401.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
MEGF8	ENST00000251268.11 link	c.326C>A	p.Pro109Gln	missense_variant	Exon 2 of 42	5	NM_001271938.2	ENSP00000251268.5
MEGF8	ENST00000334370.8 link	c.326C>A	p.Pro109Gln	missense_variant	Exon 2 of 41	1		ENSP00000334219.4
MEGF8	ENST00000378073.5 link	c.-6760C>A		5_prime_UTR_variant	Exon 2 of 41	5		ENSP00000367313.4

Frequencies

GnomAD3 genomes

Cov.:

GnomAD2 exomes

AF:

0.0000161

AC:

AN:

248734

AF XY:

0.00

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.00

Gnomad EAS 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:

0.00000342

AC:

AN:

1461626

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727112

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33480

American (AMR)

AF:

0.0000895

AC:

AN:

44716

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26134

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86256

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53358

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111842

Other (OTH)

AF:

0.0000166

AC:

AN:

60372

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.495

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000756

ExAC

AF:

0.0000165

AC:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.080

BayesDel_addAF

Benign

-0.37

BayesDel_noAF

Benign

-0.55

CADD

Benign

(source)

DANN

Benign

0.74

DEOGEN2

Benign

0.053

.;T

Eigen

Benign

-0.81

Eigen_PC

Benign

-0.66

FATHMM_MKL

Benign

0.089

LIST_S2

Benign

0.81

T;T

M_CAP

Benign

0.0087

MetaRNN

Benign

0.047

T;T

MetaSVM

Benign

-1.1

MutationAssessor

Benign

0.35

N;N

PhyloP100

2.3

PrimateAI

Uncertain

0.50

PROVEAN

Benign

0.37

N;N

REVEL

Benign

0.065

Sift

Benign

0.72

T;T

Sift4G

Benign

0.43

T;T

Polyphen

0.0030

B;.

Vest4

0.35

MutPred

0.43

Loss of glycosylation at P109 (P = 0.0093);Loss of glycosylation at P109 (P = 0.0093);

MVP

0.043

MPC

0.36

ClinPred

0.054

GERP RS

4.3

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.1

Varity_R

0.032

gMVP

0.12

Mutation Taster

=77/23

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over