chr22-27750998-C-CCTTGGCGTCA

Variant summary

Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PVS1_StrongPM2PP5

The NM_002430.3(MN1):​c.3879_3880insTGACGCCAAG​(p.Ala1294Ter) variant causes a stop gained, frameshift change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Likely pathogenic (no stars).

Frequency

Genomes: not found (cov: 32)

Consequence

MN1
NM_002430.3 stop_gained, frameshift

Scores

Not classified

Clinical Significance

Pathogenic/Likely pathogenic no assertion criteria provided P:2

Conservation

PhyloP100: 4.14
Variant links:
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]

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ACMG classification

Classification made for transcript

Verdict is Likely_pathogenic. Variant got 7 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 4 pathogenic variants in the truncated region.
PM2
Very rare variant in population databases, with high coverage;
PP5
Variant 22-27750998-C-CCTTGGCGTCA is Pathogenic according to our data. Variant chr22-27750998-C-CCTTGGCGTCA is described in ClinVar as [Likely_pathogenic]. Clinvar id is 812561.Status of the report is no_assertion_criteria_provided, 0 stars.

Transcripts

RefSeq

Gene Transcript HGVSc HGVSp Effect #exon/exons MANE Protein UniProt
MN1NM_002430.3 linkuse as main transcriptc.3879_3880insTGACGCCAAG p.Ala1294Ter stop_gained, frameshift_variant 2/2 ENST00000302326.5 NP_002421.3

Ensembl

Gene Transcript HGVSc HGVSp Effect #exon/exons TSL MANE Protein Appris UniProt
MN1ENST00000302326.5 linkuse as main transcriptc.3879_3880insTGACGCCAAG p.Ala1294Ter stop_gained, frameshift_variant 2/21 NM_002430.3 ENSP00000304956 P1
MN1ENST00000497225.1 linkuse as main transcriptn.235_236insTGACGCCAAG non_coding_transcript_exon_variant 2/21
MN1ENST00000703102.1 linkuse as main transcriptn.404_405insTGACGCCAAG non_coding_transcript_exon_variant 2/2
MN1ENST00000424656.1 linkuse as main transcriptc.232_233insTGACGCCAAG p.Ala79Ter stop_gained, frameshift_variant, NMD_transcript_variant 2/35 ENSP00000397805

Frequencies

GnomAD3 genomes
Cov.:
32
GnomAD4 exome
Cov.:
31
GnomAD4 genome
Cov.:
32

ClinVar

Significance: Pathogenic/Likely pathogenic
Submissions summary: Pathogenic:2
Revision: no assertion criteria provided
LINK: link

Submissions by phenotype

MN1 C-terminal truncation (MCTT) syndrome Pathogenic:1
Likely pathogenic, no assertion criteria providedresearchUniversity of Washington Center for Mendelian Genomics, University of Washington-- -
CEBALID syndrome Pathogenic:1
Pathogenic, no assertion criteria providedliterature onlyOMIMFeb 14, 2020- -

Computational scores

Source: dbNSFP v4.3

Name
Calibrated prediction
Score
Prediction

Splicing

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

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Other links and lift over

dbSNP: rs1601319538; hg19: chr22-28146986; API