rs750344055

chr11-95865631-A-Cchr11-95865631-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_016156.6(MTMR2):c.232T>G(p.Leu78Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,630 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. L78M) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 32)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: MTMR2 NM_016156.6 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.22

Genes affected

MTMR2 (HGNC:7450): (myotubularin related protein 2) This gene is a member of the myotubularin family of phosphoinositide lipid phosphatases. The encoded protein possesses phosphatase activity towards phosphatidylinositol-3-phosphate and phosphatidylinositol-3,5-bisphosphate. Mutations in this gene are a cause of Charcot-Marie-Tooth disease type 4B, an autosomal recessive demyelinating neuropathy. Alternatively spliced transcript variants encoding multiple isoforms have been found for this gene. [provided by RefSeq, Aug 2011]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.33843127).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
MTMR2	NM_016156.6	c.232T>G	p.Leu78Val	missense_variant	3/15	ENST00000346299.10

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
MTMR2	ENST00000346299.10	c.232T>G	p.Leu78Val	missense_variant	3/15	1	NM_016156.6	P3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD3 exomes AF: 0.00000398 AC: 1 AN: 251244 Hom.: 0 AF XY: 0.00 AC XY: 0 AN XY: 135776

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00000881

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000137 AC: 2 AN: 1461630 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 727120

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: 0.00000180

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ExAC AF: 0.00000824 AC: 1

EpiCase AF: 0.00

EpiControl AF: 0.0000593

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.17
BayesDel_addAF	Uncertain	0.084	D
BayesDel_noAF	Benign	-0.12
Cadd	Benign	22
Dann	Uncertain	0.99
DEOGEN2	Uncertain	0.51	D;.;.;.;T
Eigen	Benign	-0.059
Eigen_PC	Benign	0.042
FATHMM_MKL	Uncertain	0.97	D
LIST_S2	Uncertain	0.92	D;D;.;.;D
M_CAP	Benign	0.083	D
MetaRNN	Benign	0.34	T;T;T;T;T
MetaSVM	Uncertain	-0.025	T
MutationAssessor	Uncertain	2.3	M;.;.;.;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Uncertain	0.59	T
PROVEAN	Benign	-2.3	N;N;N;N;N
REVEL	Uncertain	0.45
Sift	Benign	0.060	T;T;T;T;T
Sift4G	Uncertain	0.053	T;T;T;T;.
Polyphen		0.14	B;.;.;.;.
Vest4		0.49
MutPred		0.65		Loss of glycosylation at P77 (P = 0.0826);.;.;.;.;
MVP		0.81
MPC		0.34
ClinPred		0.23	T
GERP RS		3.5
Varity_R		0.15
gMVP		0.65

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs750344055; hg19: chr11-95598795;