Variant 1-1048892-C-G details in Genebe, Genetics Data Aggregator

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3

The ENST00000379370.7(AGRN):c.4131C>G(p.Phe1377Leu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000168 in 1,545,330 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Synonymous variant affecting the same amino acid position (i.e. F1377F) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000013 ( 0 hom., cov: 27)

Exomes 𝑓: 0.000017 ( 0 hom. )

Consequence

AGRN
ENST00000379370.7 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: -2.59

Variant links:

Genes affected

AGRN (HGNC:329): (agrin) This gene encodes one of several proteins that are critical in the development of the neuromuscular junction (NMJ), as identified in mouse knock-out studies. The encoded protein contains several laminin G, Kazal type serine protease inhibitor, and epidermal growth factor domains. Additional post-translational modifications occur to add glycosaminoglycans and disulfide bonds. In one family with congenital myasthenic syndrome affecting limb-girdle muscles, a mutation in this gene was found. Alternative splicing results in multiple transcript variants encoding different isoforms. [provided by RefSeq, Mar 2015]

AGRN links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 3 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.794

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
AGRN	NM_198576.4 linkuse as main transcript	c.4131C>G	p.Phe1377Leu	missense_variant	24/36	ENST00000379370.7	NP_940978.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
AGRN	ENST00000379370.7 linkuse as main transcript	c.4131C>G	p.Phe1377Leu	missense_variant	24/36	1	NM_198576.4	ENSP00000368678	P1	O00468-6

Frequencies

GnomAD3 genomes

AF:

0.0000132

AC:

AN:

151734

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:

0.00

Gnomad SAS

AF:

0.000208

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000318

AC:

AN:

157272

Hom.:

AF XY:

0.0000470

AC XY:

AN XY:

85094

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.000119

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000431

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000486

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000172

AC:

AN:

1393596

Hom.:

Cov.:

AF XY:

0.0000219

AC XY:

AN XY:

686286

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:

0.0000881

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000149

Gnomad4 OTH exome

AF:

0.0000174

GnomAD4 genome

AF:

0.0000132

AC:

AN:

151734

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74108

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.000208

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000224

Hom.:

Bravo

AF:

0.0000189

ExAC

AF:

0.0000175

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

Congenital myasthenic syndrome 8

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Apr 05, 2023

This variant has not been reported in the literature in individuals affected with AGRN-related conditions. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. ClinVar contains an entry for this variant (Variation ID: 1014346). This variant is present in population databases (rs368555478, gnomAD 0.01%). This sequence change replaces phenylalanine, which is neutral and non-polar, with leucine, which is neutral and non-polar, at codon 1377 of the AGRN protein (p.Phe1377Leu). -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Uncertain

0.029

BayesDel_noAF

Uncertain

-0.050

CADD

Benign

0.13

DANN

Benign

0.97

Eigen

Benign

-0.51

Eigen_PC

Benign

-0.88

FATHMM_MKL

Benign

0.17

LIST_S2

Benign

0.80

T;T

M_CAP

Pathogenic

0.68

MetaRNN

Pathogenic

0.79

D;D

MetaSVM

Uncertain

0.75

MutationAssessor

Pathogenic

3.4

M;.

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.77

PROVEAN

Uncertain

-4.3

D;.

REVEL

Uncertain

0.53

Sift

Pathogenic

0.0

D;.

Sift4G

Pathogenic

0.0

D;D

Vest4

0.61

MutPred

0.44

Loss of catalytic residue at F1377 (P = 0.1975);.;

MVP

0.89

MPC

0.61

ClinPred

0.90

GERP RS

-5.8

gMVP

0.84

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