NM_000230.3:c.133A>G

Variant names:

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 3P and 3B. PM1PP2BP4_ModerateBS1_Supporting

The NM_000230.3(LEP):c.133A>G(p.Ile45Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000248 in 1,614,068 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/22 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (no stars).

Frequency

Genomes: 𝑓 0.00020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000062 ( 0 hom. )

Consequence

LEP
NM_000230.3 missense

Scores

Clinical Significance

Uncertain significance no assertion criteria provided U:1

Conservation

PhyloP100: 1.18

Variant links:

Genes affected

LEP (HGNC:6553): (leptin) This gene encodes a protein that is secreted by white adipocytes into the circulation and plays a major role in the regulation of energy homeostasis. Circulating leptin binds to the leptin receptor in the brain, which activates downstream signaling pathways that inhibit feeding and promote energy expenditure. This protein also has several endocrine functions, and is involved in the regulation of immune and inflammatory responses, hematopoiesis, angiogenesis, reproduction, bone formation and wound healing. Mutations in this gene and its regulatory regions cause severe obesity and morbid obesity with hypogonadism in human patients. A mutation in this gene has also been linked to type 2 diabetes mellitus development. [provided by RefSeq, Aug 2017]

LEP links:

ENSG00000289434 (HGNC:):

ENSG00000289434 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM1

In a chain Leptin (size 145) in uniprot entity LEP_HUMAN there are 9 pathogenic changes around while only 1 benign (90%) in NM_000230.3

PP2

Missense variant in the gene, where a lot of missense mutations are associated with disease in ClinVar. The gene has 6 curated pathogenic missense variants (we use a threshold of 10). The gene has 1 curated benign missense variants. Gene score misZ: 0.90973 (below the threshold of 3.09). Trascript score misZ: 1.8247 (below the threshold of 3.09). GenCC associations: The gene is linked to obesity due to congenital leptin deficiency.

BP4

Computational evidence support a benign effect (MetaRNN=0.09832972).

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.000204 (31/152196) while in subpopulation AFR AF = 0.000748 (31/41434). AF 95% confidence interval is 0.000542. There are 0 homozygotes in GnomAd4. There are 14 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
LEP	NM_000230.3 link	c.133A>G	p.Ile45Val	missense_variant	Exon 2 of 3	ENST00000308868.5	NP_000221.1	P41159A4D0Y8
LEP	XM_005250340.6 link	c.133A>G	p.Ile45Val	missense_variant	Exon 2 of 3		XP_005250397.1	P41159

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
LEP	ENST00000308868.5 link	c.133A>G	p.Ile45Val	missense_variant	Exon 2 of 3	1	NM_000230.3	ENSP00000312652.4		P41159
ENSG00000289434	ENST00000785131.1 link	n.168+11211T>C		intron_variant	Intron 1 of 1

Frequencies

GnomAD3 genomes

AF:

0.000204

AC:

AN:

152196

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000748

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

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

GnomAD2 exomes

AF:

0.0000596

AC:

AN:

251490

AF XY:

0.0000589

show subpopulations

Gnomad AFR exome

AF:

0.000800

Gnomad AMR exome

AF:

0.0000578

Gnomad ASJ exome

AF:

0.00

Gnomad EAS 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:

0.00000616

AC:

AN:

1461872

Hom.:

Cov.:

AF XY:

0.00000963

AC XY:

AN XY:

727238

show subpopulations

African (AFR)

AF:

0.000209

AC:

AN:

33480

American (AMR)

AF:

0.0000447

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86258

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1111994

Other (OTH)

AF:

0.00

AC:

AN:

60396

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.469

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

AF:

0.000204

AC:

AN:

152196

Hom.:

Cov.:

AF XY:

0.000188

AC XY:

AN XY:

74364

show subpopulations

African (AFR)

AF:

0.000748

AC:

AN:

41434

American (AMR)

AF:

0.00

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5198

South Asian (SAS)

AF:

0.00

AC:

AN:

4832

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10622

Middle Eastern (MID)

AF:

0.00

AC:

AN:

316

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

68032

Other (OTH)

AF:

0.00

AC:

AN:

2092

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.530

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Alfa

AF:

0.000230

Hom.:

Bravo

AF:

0.000223

ESP6500AA

AF:

0.000908

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.0000824

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: no assertion criteria provided

LINK: link

Submissions by phenotype

LEP-related disorder

Uncertain:1

Dec 05, 2023

PreventionGenetics, part of Exact Sciences

Significance:Uncertain significance

Review Status:no assertion criteria provided

Collection Method:clinical testing

The LEP c.133A>G variant is predicted to result in the amino acid substitution p.Ile45Val. This variant was reported in a large study of severely obese individuals; however, pathogenicity was not established (Courbage et al 2021. PubMed ID: 34097736). It was suggested to be potentially damaging in a study of prevalence of potentially damaging variants in the LEP gene (Nunziata et al. 2017. PubMed ID: 29101506). This variant is reported in 0.072% of alleles in individuals of African descent in gnomAD. At this time, the clinical significance of this variant is uncertain due to the absence of conclusive functional and genetic evidence. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.16

BayesDel_addAF

Benign

-0.34

BayesDel_noAF

Benign

-0.32

CADD

Benign

(source)

DANN

Benign

0.94

DEOGEN2

Uncertain

0.43

Eigen

Benign

-0.45

Eigen_PC

Benign

-0.41

FATHMM_MKL

Benign

0.64

LIST_S2

Benign

0.84

M_CAP

Benign

0.020

MetaRNN

Benign

0.098

MetaSVM

Benign

-0.68

MutationAssessor

Uncertain

2.7

PhyloP100

1.2

PrimateAI

Benign

0.45

PROVEAN

Benign

-0.49

REVEL

Benign

0.22

Sift

Benign

0.18

Sift4G

Benign

0.19

Polyphen

0.089

Vest4

0.32

MVP

0.73

MPC

0.64

ClinPred

0.027

GERP RS

2.4

Varity_R

0.050

gMVP

0.72

Mutation Taster

=98/2

polymorphism

(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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NM_000230.3:c.133A>G

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over