chr22-27751061-G-A

Variant names:

• chr22-27751061-G-A
• rs1601319615
• NM_002430.3:c.3817C>T

Variant summary

Our verdict is Pathogenic. The variant received 14 ACMG points: 14P and 0B. PVS1_Strong PM2 PP5_Very_Strong

The NM_002430.3(MN1):​c.3817C>T​(p.Gln1273*) 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
• Publications: 0 publications found

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]

MN1 Gene-Disease associations (from GenCC):

• CEBALID syndrome

  Inheritance: AD Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), Ambry Genetics, G2P
• familial meningioma

  Inheritance: AD Classification: LIMITED Submitted by: Ambry Genetics

ACMG classification

Our verdict: Pathogenic. The variant received 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 11 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 VariationId is 812559.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002430.3. 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
	MN1	NM_002430.3	MANE Select	c.3817C>T	p.Gln1273*	stop_gained	Exon 2 of 2	NP_002421.3

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	MN1	ENST00000302326.5	TSL:1 MANE Select	c.3817C>T	p.Gln1273*	stop_gained	Exon 2 of 2	ENSP00000304956.4	Q10571
	MN1	ENST00000497225.1	TSL:1	n.173C>T		non_coding_transcript_exon	Exon 2 of 2
	MN1	ENST00000424656.1	TSL:5	n.169C>T		non_coding_transcript_exon	Exon 2 of 3	ENSP00000397805.1	H7C105

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 32

ClinVar

ClinVar submissions

Significance: Pathogenic

Revision: criteria provided, multiple submitters, no conflicts

Pathogenic	VUS	Benign	Condition
3	-	-	CEBALID syndrome (4)
1	-	-	MN1 C-terminal truncation (MCTT) syndrome (1)

Computational scores

Source: dbNSFP v4.9

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
PhyloP100		5.2
Vest4		0.78
GERP RS		4.1
Mutation Taster		=4/196	disease causing (ClinVar)

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

Other links and lift over

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