3-155084222-A-G

Variant names:

• chr3-155084222-A-G
• NM_007289.4:c.55A>G

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_007289.4(MME):​c.55A>G​(p.Lys19Glu) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. K19R) has been classified as Uncertain significance.

• Frequency: Genomes: not found (cov: 33)
• Consequence: MME NM_007289.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.01
• 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: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
MME	NM_007289.4	c.55A>G	p.Lys19Glu	missense_variant	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.55A>G	p.Lys19Glu	missense_variant	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: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Inborn genetic diseases Uncertain:1

Jan 31, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.55A>G (p.K19E) alteration is located in exon 2 (coding exon 1) of the MME gene. This alteration results from a A to G substitution at nucleotide position 55, causing the lysine (K) at amino acid position 19 to be replaced by a glutamic acid (E). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.10
BayesDel_addAF	Pathogenic	0.28	D
BayesDel_noAF	Pathogenic	0.16
CADD	Benign	21
DANN	Uncertain	1.0
DEOGEN2	Benign	0.29	T;T;T;T;.;T;T;T;T;.;T;T;T
Eigen	Uncertain	0.59
Eigen_PC	Uncertain	0.60
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Uncertain	0.92	.;D;.;D;D;.;.;.;.;D;D;D;D
M_CAP	Benign	0.065	D
MetaRNN	Uncertain	0.53	D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.75	D
MutationAssessor	Uncertain	2.3	M;.;M;.;.;.;M;M;M;.;.;.;M
PhyloP100		5.0
PrimateAI	Uncertain	0.54	T
PROVEAN	Benign	-0.64	N;.;N;N;.;N;N;N;N;N;N;N;.
REVEL	Uncertain	0.51
Sift	Benign	0.053	T;.;T;D;.;D;T;T;T;D;T;D;.
Sift4G	Benign	0.96	T;D;T;T;D;D;T;T;T;T;D;T;T
Polyphen		0.99	D;.;D;.;.;.;D;D;D;.;.;.;D
Vest4		0.59
MutPred		0.29		Loss of methylation at K19 (P = 8e-04);Loss of methylation at K19 (P = 8e-04);Loss of methylation at K19 (P = 8e-04);Loss of methylation at K19 (P = 8e-04);Loss of methylation at K19 (P = 8e-04);Loss of methylation at K19 (P = 8e-04);Loss of methylation at K19 (P = 8e-04);Loss of methylation at K19 (P = 8e-04);Loss of methylation at K19 (P = 8e-04);Loss of methylation at K19 (P = 8e-04);Loss of methylation at K19 (P = 8e-04);Loss of methylation at K19 (P = 8e-04);Loss of methylation at K19 (P = 8e-04);
MVP		0.95
MPC		0.095
ClinPred		0.80	D
GERP RS		5.3
PromoterAI		-0.021	Neutral
Varity_R		0.16
gMVP		0.37
Mutation Taster		=85/15	polymorphism

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

hg19: chr3-154802011;