3-155084193-A-G

Variant summary

Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2

The NM_007289.4(MME):c.26A>G(p.Asp9Gly) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,844 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. D9H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: MME NM_007289.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 3.97

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

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

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MME	NM_007289.4	c.26A>G	p.Asp9Gly	missense_variant	2/23	ENST00000360490.7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MME	ENST00000360490.7	c.26A>G	p.Asp9Gly	missense_variant	2/23	1	NM_007289.4	P1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251444 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135902

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.0000544

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461844 Hom.: 0 Cov.: 31 AF XY: 0.00000413 AC XY: 3 AN XY: 727228

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.00

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.0000252

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000180

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

ExAC AF: 0.00000824 AC: 1

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

not provided Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Mar 14, 2022

In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may create or strengthen a splice site. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals affected with MME-related conditions. This variant is present in population databases (rs762748390, gnomAD 0.006%). This sequence change replaces aspartic acid, which is acidic and polar, with glycine, which is neutral and non-polar, at codon 9 of the MME protein (p.Asp9Gly). -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.43
BayesDel_addAF	Pathogenic	0.29	D
BayesDel_noAF	Pathogenic	0.35
Cadd	Uncertain	25
Dann	Uncertain	1.0
DEOGEN2	Benign	0.37	T;T;T;T;.;T;T;T;T;.;T;.;T;T
Eigen	Uncertain	0.42
Eigen_PC	Uncertain	0.46
FATHMM_MKL	Uncertain	0.86	D
M_CAP	Uncertain	0.12	D
MetaRNN	Uncertain	0.63	D;D;D;D;D;D;D;D;D;D;D;D;D;D
MetaSVM	Uncertain	0.52	D
MutationAssessor	Benign	0.90	L;.;L;.;.;.;L;L;L;.;.;.;.;L
MutationTaster	Benign	1.0	D;D;D;D;D;D
PrimateAI	Uncertain	0.76	T
PROVEAN	Benign	-1.5	N;.;N;N;.;D;N;N;N;N;N;D;N;.
REVEL	Pathogenic	0.70
Sift	Benign	0.056	T;.;T;D;.;D;T;T;T;D;T;.;D;.
Sift4G	Benign	0.48	T;D;T;T;D;D;T;T;T;T;D;.;T;T
Polyphen		0.95	P;.;P;.;.;.;P;P;P;.;.;.;.;P
Vest4		0.55
MutPred		0.38		Loss of stability (P = 0.0178);Loss of stability (P = 0.0178);Loss of stability (P = 0.0178);Loss of stability (P = 0.0178);Loss of stability (P = 0.0178);Loss of stability (P = 0.0178);Loss of stability (P = 0.0178);Loss of stability (P = 0.0178);Loss of stability (P = 0.0178);Loss of stability (P = 0.0178);Loss of stability (P = 0.0178);Loss of stability (P = 0.0178);Loss of stability (P = 0.0178);Loss of stability (P = 0.0178);
MVP		0.96
MPC		0.22
ClinPred		0.74	D
GERP RS		5.3
Varity_R		0.15
gMVP		0.67

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		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: rs762748390; hg19: chr3-154801982; COSMIC: COSV64705828;