Genetic Variant NTM:p.Asn273Lys (chr11-132314588-C-G) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_001352005.2(NTM):c.819C>G(p.Asn273Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000274 in 1,461,136 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: not found (cov: 33)

Exomes 𝑓: 0.0000027 ( 0 hom. )

Consequence

NTM
NM_001352005.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.32

Variant links:

Genes affected

NTM (HGNC:17941): (neurotrimin) This gene encodes a member of the IgLON (LAMP, OBCAM, Ntm) family of immunoglobulin (Ig) domain-containing glycosylphosphatidylinositol (GPI)-anchored cell adhesion molecules. The encoded protein may promote neurite outgrowth and adhesion via a homophilic mechanism. This gene is closely linked to a related family member, opioid binding protein/cell adhesion molecule-like (OPCML), on chromosome 11. Multiple transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Jan 2009]

NTM links:

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ACMG classification

Classification made for transcript

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 rank	MANE	Protein	UniProt
NTM	NM_001352005.2 link	c.819C>G	p.Asn273Lys	missense_variant	Exon 7 of 9	ENST00000683400.1	NP_001338934.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NTM	ENST00000683400.1 link	c.819C>G	p.Asn273Lys	missense_variant	Exon 7 of 9		NM_001352005.2	ENSP00000507313.1		B7Z1Z5

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.00000399

AC:

AN:

250604

Hom.:

AF XY:

0.00000739

AC XY:

AN XY:

135408

show subpopulations

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:

0.00000274

AC:

AN:

1461136

Hom.:

Cov.:

AF XY:

0.00000275

AC XY:

AN XY:

726828

show subpopulations

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:

0.00000270

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

ExAC

AF:

0.0000165

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000595

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

May 09, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.819C>G (p.N273K) alteration is located in exon 6 (coding exon 6) of the NTM gene. This alteration results from a C to G substitution at nucleotide position 819, causing the asparagine (N) at amino acid position 273 to be replaced by a lysine (K). 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

Uncertain

0.51

BayesDel_addAF

Benign

-0.025

BayesDel_noAF

Benign

-0.27

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.025

.;T;.;.;.;T

Eigen

Uncertain

0.26

Eigen_PC

Uncertain

0.30

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Uncertain

0.92

D;D;D;D;D;D

M_CAP

Benign

0.034

MetaRNN

Uncertain

0.56

D;D;D;D;D;D

MetaSVM

Benign

-0.52

MutationAssessor

Benign

1.4

L;L;L;L;.;.

PrimateAI

Uncertain

0.70

PROVEAN

Uncertain

-3.5

D;D;D;D;.;.

REVEL

Uncertain

0.32

Sift

Uncertain

0.0040

D;D;D;D;.;.

Sift4G

Uncertain

0.025

D;D;D;D;D;D

Polyphen

0.83

P;D;P;P;.;.

Vest4

0.73

MutPred

0.62

Gain of methylation at N273 (P = 0.032);Gain of methylation at N273 (P = 0.032);Gain of methylation at N273 (P = 0.032);Gain of methylation at N273 (P = 0.032);.;.;

MVP

0.47

MPC

1.1

ClinPred

0.95

GERP RS

3.7

Varity_R

0.70

gMVP

0.61

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

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over