Genetic Variant LCN1:p.Arg78Gln (chr9-135523243-G-A) – ACMG Classification: Likely_benign (-2 pts)

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_ModerateBP6_Moderate

The NM_002297.4(LCN1):c.233G>A(p.Arg78Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000226 in 1,459,844 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★).

Frequency

Genomes: not found (cov: 34)

Exomes 𝑓: 0.000023 ( 0 hom. )

Consequence

LCN1
NM_002297.4 missense

Scores

Clinical Significance

Likely benign criteria provided, single submitter B:1

Conservation

PhyloP100: -0.675

Variant links:

Genes affected

LCN1 (HGNC:6525): (lipocalin 1) This gene encodes a member of the lipocalin family of small secretory proteins. Lipocalins are extracellular transport proteins that bind to a variety of hydrophobic ligands. The encoded protein is the primary lipid binding protein in tears and is overproduced in response to multiple stimuli including infection and stress. The encoded protein may be a marker for chromosome aneuploidy as well as an autoantigen in Sjogren's syndrome. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene, and two pseudogenes of this gene are also located on the long arm of chromosome 9. [provided by RefSeq, Nov 2011]

LCN1 links:

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ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.113416106).

BP6

Variant 9-135523243-G-A is Benign according to our data. Variant chr9-135523243-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 2226778.Status of the report is criteria_provided_single_submitter, 1 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LCN1	NM_002297.4 link	c.233G>A	p.Arg78Gln	missense_variant	Exon 3 of 7	ENST00000371781.4	NP_002288.1	P31025A0A024R8D7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LCN1	ENST00000371781.4 link	c.233G>A	p.Arg78Gln	missense_variant	Exon 3 of 7	1	NM_002297.4	ENSP00000360846.3		P31025
LCN1	ENST00000263598.6 link	c.233G>A	p.Arg78Gln	missense_variant	Exon 3 of 7	1		ENSP00000263598.2		P31025

Frequencies

GnomAD3 genomes

Cov.:

GnomAD3 exomes

AF:

0.0000201

AC:

AN:

249094

Hom.:

AF XY:

0.0000222

AC XY:

AN XY:

134874

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000545

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000356

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000226

AC:

AN:

1459844

Hom.:

Cov.:

AF XY:

0.0000207

AC XY:

AN XY:

726182

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000277

Gnomad4 SAS exome

AF:

0.0000232

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000171

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000659

Hom.:

ExAC

AF:

0.0000330

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.000119

ClinVar

Significance: Likely benign

Submissions summary: Benign:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Benign:1

Dec 15, 2022

Ambry Genetics

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.055

BayesDel_addAF

Benign

-0.57

BayesDel_noAF

Benign

-0.88

CADD

Benign

0.54

DANN

Benign

0.28

DEOGEN2

Benign

0.0096

T;T

Eigen

Benign

-1.6

Eigen_PC

Benign

-1.6

FATHMM_MKL

Benign

0.0011

LIST_S2

Benign

0.33

.;T

M_CAP

Benign

0.00089

MetaRNN

Benign

0.11

T;T

MetaSVM

Benign

-0.92

MutationAssessor

Benign

-1.7

N;N

PrimateAI

Benign

0.23

PROVEAN

Benign

1.4

N;N

REVEL

Benign

0.014

Sift

Benign

1.0

T;T

Sift4G

Benign

1.0

T;T

Polyphen

0.0040

B;B

Vest4

0.12

MutPred

0.41

Gain of methylation at K83 (P = 0.1128);Gain of methylation at K83 (P = 0.1128);

MVP

0.16

MPC

0.14

ClinPred

0.031

GERP RS

-1.1

Varity_R

0.16

gMVP

0.20

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

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