11-64805742-TCTC-T

Position:

• chr11-64805742-TCTC-T

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PM4_Supporting

The NM_001370259.2(MEN1):​c.1075_1077del​(p.Glu359del) variant causes a inframe deletion change. The variant allele was found at a frequency of 0.000000684 in 1,461,874 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars).

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 6.8e-7 (0 hom.)
• Consequence: MEN1 NM_001370259.2 inframe_deletion
• Clinical Significance: Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1 B:1
• Conservation: PhyloP100: 5.25

Genes affected

MEN1 (HGNC:7010): (menin 1) This gene encodes menin, a tumor suppressor associated with a syndrome known as multiple endocrine neoplasia type 1. Menin is a scaffold protein that functions in histone modification and epigenetic gene regulation. It is thought to regulate several pathways and processes by altering chromatin structure through the modification of histones. [provided by RefSeq, May 2019]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM4: Nonframeshift variant in NON repetitive region in NM_001370259.2. Strenght limited to Supporting due to length of the change: 1aa.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
MEN1	NM_001370259.2	c.1075_1077del	p.Glu359del	inframe_deletion	8/10	ENST00000450708.7	NP_001357188.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
MEN1	ENST00000450708.7	c.1075_1077del	p.Glu359del	inframe_deletion	8/10	5	NM_001370259.2	ENSP00000394933	P3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.84e-7 AC: 1 AN: 1461874 Hom.: 0 AF XY: 0.00000138 AC XY: 1 AN XY: 727242

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 8.99e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1 Benign:1

Revision: criteria provided, conflicting classifications

Submissions by phenotype

Multiple endocrine neoplasia, type 1 Uncertain:1 Benign:1

Benign, criteria provided, single submitter	research	University of Washington Department of Laboratory Medicine, University of Washington	Mar 28, 2018	The MEN1 variant designated as NM_130799.2:c.1075_1077del (p.Glu359del) is classified as benign. In one observed family, multiple family members with the variant are unaffected by the multiple endocrine neoplasia constellation of symptoms, while one individual with a MEN1-associated cancer does not have the variant. Cosegregation analysis of this same observed family was performed using analyze.myvariant.org (Rañola et al, 2018, PMID:28965303) and shows a likelihood ratio of 0.0001 to 1 that this allele explains cancer in the family (Thompson, et al., 2003, PMID:12900794). This likelihood ratio indicates strong evidence against pathogenicity as the variant does not co-segregate with reported multiple endocrine neoplasia symptoms in this family. Bayesian analysis integrating all of this data (Tavtigian et al, 2018, PMID: 29300386) gives a <0.1% probability of pathogenicity, which is consistent with a classification of benign. This variant is not predicted to alter MEN1 function or modify cancer risk. A modest (less than 2 fold) increase in cancer risk due to this variant cannot be entirely excluded. This reclassification analysis was performed in conjunction with the family studies project as part of the University of Washington Find My Variant Study. -
Uncertain significance, criteria provided, single submitter	clinical testing	Labcorp Genetics (formerly Invitae), Labcorp	May 20, 2016	This variant is not present in population databases (ExAC no frequency). In summary, this is a rare in-frame deletion with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. Experimental studies have not been reported for this single amino acid deletion; its functional consequence is uncertain. This variant has been reported in an individual affected with parathyroid tumors and pancreatic gastrinoma (PMID: 94633360). This sequence change deletes 3 nucleotides from exon 8 of the MEN1 mRNA (c.1075_1077delGAG). This leads to the deletion of 1 amino acid residue in the MEN1 protein (p.Glu359del) but otherwise preserves the integrity of the reading frame. -

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: rs1060499971; hg19: chr11-64573214;