Genetic Variant MEGF8:c.6274-9C>T (chr19-42368446-C-T) – ACMG Classification: Benign (-8 pts)

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_StrongBS1

The NM_001271938.2(MEGF8):c.6274-9C>T variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000364 in 1,595,512 control chromosomes in the GnomAD database, including 1 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: 𝑓 0.000026 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000037 ( 1 hom. )

Consequence

MEGF8
NM_001271938.2 intron

Scores

Splicing: ADA: 0.00001843

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: -0.103

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: Benign. The variant received -8 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.84).

BS1

Variant frequency is greater than expected in population sas. GnomAdExome4 allele frequency = 0.0000374 (54/1443168) while in subpopulation SAS AF = 0.000336 (28/83404). AF 95% confidence interval is 0.000238. There are 1 homozygotes in GnomAdExome4. There are 33 alleles in the male GnomAdExome4 subpopulation. Median coverage is 31. This position passed quality control check.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MEGF8	NM_001271938.2 link	c.6274-9C>T		intron_variant	Intron 35 of 41	ENST00000251268.11	NP_001258867.1
MEGF8	NM_001410.3 link	c.6073-9C>T		intron_variant	Intron 34 of 40		NP_001401.2

Ensembl

Gene	Transcript	HGVSc	Effect	Exon rank	TSL	MANE	Protein
MEGF8	ENST00000251268.11 link	c.6274-9C>T	intron_variant	Intron 35 of 41	5	NM_001271938.2	ENSP00000251268.5
MEGF8	ENST00000334370.8 link	c.6073-9C>T	intron_variant	Intron 34 of 40	1		ENSP00000334219.4
MEGF8	ENST00000378073.5 link	c.-812-9C>T	intron_variant	Intron 35 of 40	5		ENSP00000367313.4
MEGF8	ENST00000598762.1 link	c.159+6233C>T	intron_variant	Intron 2 of 2	3		ENSP00000471370.1

Frequencies

GnomAD3 genomes

AF:

0.0000263

AC:

AN:

152226

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000621

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.0000627

AC:

AN:

223438

AF XY:

0.0000733

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000631

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.0000487

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000180

GnomAD4 exome

AF:

0.0000374

AC:

AN:

1443168

Hom.:

Cov.:

AF XY:

0.0000460

AC XY:

AN XY:

716862

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

32826

American (AMR)

AF:

0.0000474

AC:

AN:

42192

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25344

East Asian (EAS)

AF:

0.00

AC:

AN:

39196

South Asian (SAS)

AF:

0.000336

AC:

AN:

83404

European-Finnish (FIN)

AF:

0.00

AC:

AN:

51528

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5708

European-Non Finnish (NFE)

AF:

0.0000172

AC:

AN:

1103388

Other (OTH)

AF:

0.0000839

AC:

AN:

59582

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.530

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

AF:

0.0000263

AC:

AN:

152344

Hom.:

Cov.:

AF XY:

0.0000537

AC XY:

AN XY:

74490

show subpopulations

African (AFR)

AF:

0.0000240

AC:

AN:

41586

American (AMR)

AF:

0.00

AC:

AN:

15310

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.00

AC:

AN:

5184

South Asian (SAS)

AF:

0.000621

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68028

Other (OTH)

AF:

0.00

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.512

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome 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

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000756

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.84

CADD

Benign

0.92

(source)

DANN

Benign

0.44

PhyloP100

-0.10

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

dbscSNV1_ADA

Benign

0.000018

dbscSNV1_RF

Benign

0.0

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

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over