chr19-42371365-C-C

Variant names:

• chr19-42371365-C-C
• NM_001271938.2:c.

Variant summary

Our verdict is Pathogenic. The variant received 10 ACMG points: 10P and 0B. PVS1 PM2

The ENST00000334370.8(MEGF8):​c. variant causes a splice donor, intron change. The variant was absent in control chromosomes in GnomAD project. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 31)
• Consequence: MEGF8 ENST00000334370.8 splice_donor, intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 6.97
• Publications: 0 publications found

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: ClinGen, G2P, Labcorp Genetics (formerly Invitae), Ambry Genetics
• Carpenter syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 10 ACMG points.

• PVS1: Splicing +-2 bp (donor or acceptor) variant, LoF is a know mechanism of disease, No cryptic splice site detected. Exon removal results in frameshift change.
• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: ENST00000334370.8. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MEGF8	NM_001271938.2	MANE Select	c.		intron	N/A	NP_001258867.1	Q7Z7M0-1
	MEGF8	NM_001410.3		c.		intron	N/A	NP_001401.2	Q7Z7M0-2

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MEGF8	ENST00000251268.11	TSL:5 MANE Select	c.		splice_donor intron	N/A	ENSP00000251268.5	Q7Z7M0-1
	MEGF8	ENST00000334370.8	TSL:1	c.		splice_donor intron	N/A	ENSP00000334219.4	Q7Z7M0-2
	MEGF8	ENST00000593647.1	TSL:1	c.		intron	N/A	ENSP00000470620.1	M0QZL2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
PhyloP100		7.0

Splicing

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Other links and lift over

hg19: chr19-42875517;