3-155084238-G-A

Variant names:

• chr3-155084238-G-A
• rs886039755
• NM_007289.4:c.71G>A

Variant summary

Our verdict is Pathogenic. The variant received 12 ACMG points: 12P and 0B. PVS1 PM2 PP5_Moderate

The NM_007289.4(MME):​c.71G>A​(p.Trp24*) 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: 33)
• Consequence: MME NM_007289.4 stop_gained
• Clinical Significance: Pathogenic criteria provided, single submitter P:1 O:1
• Conservation: PhyloP100: 7.14
• Publications: 0 publications found

Genes affected

MME (HGNC:7154): (membrane metalloendopeptidase) The protein encoded by this gene is a type II transmembrane glycoprotein and a common acute lymphocytic leukemia antigen that is an important cell surface marker in the diagnosis of human acute lymphocytic leukemia (ALL). The encoded protein is present on leukemic cells of pre-B phenotype, which represent 85% of cases of ALL. This protein is not restricted to leukemic cells, however, and is found on a variety of normal tissues. The protein is a neutral endopeptidase that cleaves peptides at the amino side of hydrophobic residues and inactivates several peptide hormones including glucagon, enkephalins, substance P, neurotensin, oxytocin, and bradykinin. [provided by RefSeq, Aug 2017]

MME Gene-Disease associations (from GenCC):

• Charcot-Marie-Tooth disease axonal type 2T

  Inheritance: SD, AR, AD Classification: DEFINITIVE, STRONG, MODERATE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), ClinGen
• MME-related autosomal dominant Charcot Marie Tooth disease type 2

  Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
• spinocerebellar ataxia 43

  Inheritance: AD Classification: SUPPORTIVE, LIMITED Submitted by: Ambry Genetics, Labcorp Genetics (formerly Invitae), Orphanet
• Charcot-Marie-Tooth disease type 2T

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• congenital membranous nephropathy due to maternal anti-neutral endopeptidase alloimmunization

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

ACMG classification

Our verdict: Pathogenic. The variant received 12 ACMG points.

• PVS1: Loss of function variant, product does not undergo nonsense mediated mRNA decay. Variant located near the start codon (<100nt), not predicted to undergo nonsense mediated mRNA decay. There are 74 pathogenic variants in the truncated region.
• PM2: Very rare variant in population databases, with high coverage
• PP5: Variant 3-155084238-G-A is Pathogenic according to our data. Variant chr3-155084238-G-A is described in ClinVar as [Pathogenic]. Clinvar id is 265743.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MME	NM_007289.4	c.71G>A	p.Trp24*	stop_gained	Exon 2 of 23	ENST00000360490.7	NP_009220.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
MME	ENST00000360490.7	c.71G>A	p.Trp24*	stop_gained	Exon 2 of 23	1	NM_007289.4	ENSP00000353679.2

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 33

ClinVar

Significance: Pathogenic

Submissions summary: Pathogenic:1 Other:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Pathogenic:1

Nov 01, 2023

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Pathogenic

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change creates a premature translational stop signal (p.Trp24*) in the MME gene. It is expected to result in an absent or disrupted protein product. Loss-of-function variants in MME are known to be pathogenic (PMID: 26991897). This variant is not present in population databases (gnomAD no frequency). This premature translational stop signal has been observed in individual(s) with clinical features of MME-related conditions (PMID: 27588448, 30415211). ClinVar contains an entry for this variant (Variation ID: 265743). For these reasons, this variant has been classified as Pathogenic. -

Charcot-Marie-Tooth disease axonal type 2T Other:1

Oct 06, 2016

OMIM

Significance: risk factor

Review Status: no assertion criteria provided

Collection Method: literature only

- -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Pathogenic	0.63	D
BayesDel_noAF	Pathogenic	0.63
CADD	Pathogenic	43
DANN	Uncertain	1.0
Eigen	Pathogenic	0.90
Eigen_PC	Pathogenic	0.77
FATHMM_MKL	Uncertain	0.96	D
PhyloP100		7.1
Vest4		0.95
GERP RS		5.3
PromoterAI		-0.051	Neutral
Mutation Taster		=0/200	disease causing (fs/PTC)

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

Other links and lift over

dbSNP: rs886039755; hg19: chr3-154802027;