Genetic Variant NLN:p.Leu220Phe (chr5-65780278-C-T) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

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

The NM_020726.5(NLN):c.658C>T(p.Leu220Phe) variant causes a missense change. The variant allele was found at a frequency of 0.0000113 in 1,322,244 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 33)

Exomes 𝑓: 0.000011 ( 0 hom. )

Consequence

NLN
NM_020726.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.81

Variant links:

Genes affected

NLN (HGNC:16058): (neurolysin) This gene encodes a member of the metallopeptidase M3 protein family that cleaves neurotensin at the Pro10-Tyr11 bond, leading to the formation of neurotensin(1-10) and neurotensin(11-13). The encoded protein is likely involved in the termination of the neurotensinergic signal in the central nervous system and in the gastrointestinal tract.[provided by RefSeq, Jun 2010]

NLN links:

Genome browser will be placed here

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
NLN	NM_020726.5 link	c.658C>T	p.Leu220Phe	missense_variant	Exon 5 of 13	ENST00000380985.10	NP_065777.1	Q9BYT8

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
NLN	ENST00000380985.10 link	c.658C>T	p.Leu220Phe	missense_variant	Exon 5 of 13	1	NM_020726.5	ENSP00000370372.5		Q9BYT8

Frequencies

GnomAD3 genomes

AF:

0.0000131

AC:

AN:

152134

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000385

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000825

AC:

AN:

206048

Hom.:

AF XY:

0.0000711

AC XY:

AN XY:

112584

show subpopulations

Gnomad AFR exome

AF:

0.0000757

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00115

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:

0.0000111

AC:

AN:

1170110

Hom.:

Cov.:

AF XY:

0.0000118

AC XY:

AN XY:

593424

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000341

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000200

GnomAD4 genome

AF:

0.0000131

AC:

AN:

152134

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74322

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000385

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Bravo

AF:

0.0000113

ExAC

AF:

0.000115

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Jan 31, 2025

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.658C>T (p.L220F) alteration is located in exon 5 (coding exon 5) of the NLN gene. This alteration results from a C to T substitution at nucleotide position 658, causing the leucine (L) at amino acid position 220 to be replaced by a phenylalanine (F). 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

Pathogenic

0.58

BayesDel_addAF

Benign

-0.15

BayesDel_noAF

Uncertain

-0.040

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.38

T;T

Eigen

Pathogenic

0.96

Eigen_PC

Pathogenic

0.89

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.95

D;D

M_CAP

Uncertain

0.12

MetaRNN

Uncertain

0.60

D;D

MetaSVM

Benign

-0.36

MutationAssessor

Pathogenic

4.0

H;.

PrimateAI

Uncertain

0.57

PROVEAN

Uncertain

-3.7

D;D

REVEL

Uncertain

0.47

Sift

Pathogenic

0.0

D;D

Sift4G

Pathogenic

0.0

D;D

Polyphen

1.0

D;.

Vest4

0.78

MutPred

0.77

Gain of catalytic residue at L220 (P = 0.0945);.;

MVP

0.42

MPC

0.56

ClinPred

0.76

GERP RS

6.1

Varity_R

0.82

gMVP

0.81

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