22-27751038-GC-G

Position:

• chr22-27751038-GC-G

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PVS1_Strong PM2

The NM_002430.3(MN1):​c.3839del​(p.Cys1280SerfsTer40) variant causes a frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: MN1 NM_002430.3 frameshift
• Clinical Significance: Uncertain significance criteria provided, single submitter P:1 U:1
• Conservation: PhyloP100: 7.16

Genes affected

MN1 (HGNC:7180): (MN1 proto-oncogene, transcriptional regulator) Meningioma 1 (MN1) contains two sets of CAG repeats. It is disrupted by a balanced translocation (4;22) in a meningioma, and its inactivation may contribute to meningioma 32 pathogenesis. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Likely_pathogenic. Variant got 6 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant is located in the 3'-most exon, not predicted to undergo nonsense mediated mRNA decay. There are 5 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MN1	NM_002430.3	c.3839del	p.Cys1280SerfsTer40	frameshift_variant	2/2	ENST00000302326.5	NP_002421.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MN1	ENST00000302326.5	c.3839del	p.Cys1280SerfsTer40	frameshift_variant	2/2	1	NM_002430.3	ENSP00000304956	P1
MN1	ENST00000497225.1	n.195del		non_coding_transcript_exon_variant	2/2	1
MN1	ENST00000703102.1	n.364del		non_coding_transcript_exon_variant	2/2
MN1	ENST00000424656.1	c.192del	p.Cys65SerfsTer40	frameshift_variant, NMD_transcript_variant	2/3	5		ENSP00000397805

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Uncertain significance

Submissions summary: Pathogenic:1 Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

MN1 C-terminal truncation (MCTT) syndrome Pathogenic:1

Likely pathogenic, no assertion criteria provided

research

University of Washington Center for Mendelian Genomics, University of Washington

-

- -

Atrial septal defect;C0235833:Congenital diaphragmatic hernia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Genomic Medicine Lab, University of California San Francisco

Dec 06, 2018

- -

Computational scores

Source: dbNSFP v4.3

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: rs1601319594; hg19: chr22-28147026;