chr22-27751061-G-A

Position:

• chr22-27751061-G-A

Variant summary

Our verdict is Pathogenic. Variant got 14 ACMG points: 14P and 0B. PVS1_Strong PM2 PP5_Very_Strong

The NM_002430.3(MN1):​c.3817C>T​(p.Gln1273Ter) variant causes a stop gained change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Pathogenic (★★).

• Frequency: Genomes: not found (cov: 32)
• Consequence: MN1 NM_002430.3 stop_gained
• Clinical Significance: Pathogenic criteria provided, multiple submitters, no conflicts P:4 O:1
• Conservation: PhyloP100: 5.21

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 Pathogenic. Variant got 14 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 7 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 22-27751061-G-A is Pathogenic according to our data. Variant chr22-27751061-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 812559.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars. Variant chr22-27751061-G-A is described in Lovd as [Pathogenic].

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MN1	NM_002430.3	c.3817C>T	p.Gln1273Ter	stop_gained	2/2	ENST00000302326.5	NP_002421.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MN1	ENST00000302326.5	c.3817C>T	p.Gln1273Ter	stop_gained	2/2	1	NM_002430.3	ENSP00000304956	P1
MN1	ENST00000497225.1	n.173C>T		non_coding_transcript_exon_variant	2/2	1
MN1	ENST00000703102.1	n.342C>T		non_coding_transcript_exon_variant	2/2
MN1	ENST00000424656.1	c.172C>T	p.Gln58Ter	stop_gained, NMD_transcript_variant	2/3	5		ENSP00000397805

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:4 Other:1

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

CEBALID syndrome Pathogenic:3 Other:1

not provided, no classification provided	literature only	GeneReviews	-	Recurrent pathogenic variant in 3 out of 25 persons -
Pathogenic, criteria provided, single submitter	curation	SIB Swiss Institute of Bioinformatics	Jul 29, 2020	This variant is interpreted as Pathogenic for CEBALID syndrome, autosomal dominant. The following ACMG Tag(s) were applied: Absent from controls (or at extremely low frequency if recessive) in Exome Sequencing Project, 1000 Genomes Project, or Exome Aggregation Consortium (PM2); Located in a mutational hot spot and/or critical and well-established functional domain (e.g., active site of an enzyme) without benign variation (PM1); Protein length changes as a result of in-frame deletions/insertions in a nonrepeat region or stop-loss variants (PM4); De novo (paternity and maternity confirmed) (PS2). -
Pathogenic, no assertion criteria provided	literature only	OMIM	Feb 14, 2020	- -
Pathogenic, criteria provided, single submitter	clinical testing	Eurofins-Biomnis	Nov 22, 2022	- -

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

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Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.60	D
BayesDel_noAF	Pathogenic	0.62
CADD	Pathogenic	44
DANN	Uncertain	1.0
Eigen	Pathogenic	0.86
Eigen_PC	Pathogenic	0.67
FATHMM_MKL	Uncertain	0.96	D
MutationTaster	Benign	1.0	D
Vest4		0.78
GERP RS		4.1

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

LitVar

Other links and lift over

dbSNP: rs1601319615; hg19: chr22-28147049; COSMIC: COSV56558450;