1-1051538-C-T

Position:

chr1-1051538-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_198576.4(AGRN):c.5456C>T(p.Thr1819Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000791 in 1,567,284 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00036 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000049 ( 0 hom. )

Consequence

AGRN
NM_198576.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.33

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 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=0.027648062).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
AGRN	NM_198576.4 linkuse as main transcript	c.5456C>T	p.Thr1819Ile	missense_variant	32/36	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.5456C>T	p.Thr1819Ile	missense_variant	32/36	1	NM_198576.4	ENSP00000368678	P1	O00468-6
AGRN	ENST00000651234.1 linkuse as main transcript	c.5153C>T	p.Thr1718Ile	missense_variant	32/38			ENSP00000499046
AGRN	ENST00000652369.1 linkuse as main transcript	c.5141C>T	p.Thr1714Ile	missense_variant	31/35			ENSP00000498543
AGRN	ENST00000620552.4 linkuse as main transcript	c.5054C>T	p.Thr1685Ile	missense_variant	33/39	5		ENSP00000484607

Frequencies

GnomAD3 genomes

AF:

0.000368

AC:

AN:

152232

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00133

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000193

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:

0.000120

AC:

AN:

183752

Hom.:

AF XY:

0.0000993

AC XY:

AN XY:

100738

show subpopulations

Gnomad AFR exome

AF:

0.00155

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000266

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.000208

GnomAD4 exome

AF:

0.0000488

AC:

AN:

1414934

Hom.:

Cov.:

AF XY:

0.0000558

AC XY:

AN XY:

699116

show subpopulations

Gnomad4 AFR exome

AF:

0.00168

Gnomad4 AMR exome

AF:

0.0000498

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000209

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00

Gnomad4 OTH exome

AF:

0.0000684

GnomAD4 genome

AF:

0.000361

AC:

AN:

152350

Hom.:

Cov.:

AF XY:

0.000322

AC XY:

AN XY:

74498

show subpopulations

Gnomad4 AFR

AF:

0.00130

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.000193

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.000837

Hom.:

Bravo

AF:

0.000476

ESP6500AA

AF:

0.00138

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000117

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

Mar 08, 2022

This sequence change replaces threonine, which is neutral and polar, with isoleucine, which is neutral and non-polar, at codon 1819 of the AGRN protein (p.Thr1819Ile). This variant is present in population databases (rs72900459, gnomAD 0.2%). This variant has not been reported in the literature in individuals affected with AGRN-related conditions. ClinVar contains an entry for this variant (Variation ID: 575706). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Deleterious"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). 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. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_addAF

Benign

-0.38

BayesDel_noAF

Benign

-0.32

CADD

Benign

DANN

Uncertain

1.0

Eigen

Uncertain

0.20

Eigen_PC

Benign

0.16

FATHMM_MKL

Benign

0.73

LIST_S2

Uncertain

0.88

D;D

M_CAP

Uncertain

0.22

MetaRNN

Benign

0.028

T;T

MetaSVM

Uncertain

-0.25

MutationTaster

Benign

1.0

PrimateAI

Uncertain

0.60

PROVEAN

Uncertain

-3.3

D;.

REVEL

Uncertain

0.32

Sift

Benign

0.039

D;.

Sift4G

Uncertain

0.0020

D;D

Vest4

0.54

MVP

0.78

MPC

0.58

ClinPred

0.14

GERP RS

5.0

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.8

gMVP

0.36

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.050

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