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

Variant summary

Our verdict is Uncertain significance. The variant received 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

Publications

0 publications found

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 was made for transcript

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
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.:

GnomAD2 exomes

AF:

0.00000399

AC:

AN:

250604

AF XY:

0.00000739

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 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

African (AFR)

AF:

0.00

AC:

AN:

33460

American (AMR)

AF:

0.00

AC:

AN:

44634

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.00

AC:

AN:

39682

South Asian (SAS)

AF:

0.00

AC:

AN:

86046

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53404

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

0.00000270

AC:

AN:

1111654

Other (OTH)

AF:

0.0000166

AC:

AN:

60360

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

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

(source)

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;.;.

PhyloP100

2.3

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

Mutation Taster

=26/74

disease causing

(source)

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

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11-132314588-C-G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over