NM_198576.4:c.4821C>T

Variant names:

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_198576.4(AGRN):c.4821C>T(p.Pro1607Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000878 in 1,607,568 control chromosomes in the GnomAD database, including 15 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. P1607P) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0017 ( 1 hom., cov: 33)

Exomes 𝑓: 0.00080 ( 14 hom. )

Consequence

AGRN
NM_198576.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:2

Conservation

PhyloP100: -5.77

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

congenital myasthenic syndrome 8
Inheritance: AR Classification: STRONG Submitted by: PanelApp Australia, Labcorp Genetics (formerly Invitae), Genomics England PanelApp
presynaptic congenital myasthenic syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
postsynaptic congenital myasthenic syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

AGRN links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.65).

BP6

Variant 1-1049979-C-T is Benign according to our data. Variant chr1-1049979-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 474138.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-5.77 with no splicing effect.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.00166 (251/150986) while in subpopulation SAS AF = 0.0115 (54/4710). AF 95% confidence interval is 0.00902. There are 1 homozygotes in GnomAd4. There are 131 alleles in the male GnomAd4 subpopulation. Median coverage is 33. This position passed quality control check.

BS2

High Homozygotes in GnomAdExome4 at 14 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AGRN	NM_198576.4 link	c.4821C>T	p.Pro1607Pro	synonymous_variant	Exon 27 of 36	ENST00000379370.7	NP_940978.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein
AGRN	ENST00000379370.7 link	c.4821C>T	p.Pro1607Pro	synonymous_variant	Exon 27 of 36	1	NM_198576.4	ENSP00000368678.2
AGRN	ENST00000651234.1 link	c.4506C>T	p.Pro1502Pro	synonymous_variant	Exon 26 of 38			ENSP00000499046.1
AGRN	ENST00000652369.2 link	c.4506C>T	p.Pro1502Pro	synonymous_variant	Exon 26 of 35			ENSP00000498543.1
AGRN	ENST00000620552.4 link	c.4407C>T	p.Pro1469Pro	synonymous_variant	Exon 27 of 39	5		ENSP00000484607.1

Frequencies

GnomAD3 genomes

AF:

0.00166

AC:

251

AN:

150876

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00438

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000658

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.0115

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000591

Gnomad OTH

AF:

0.00144

GnomAD2 exomes

AF:

0.00170

AC:

409

AN:

239982

AF XY:

0.00208

show subpopulations

Gnomad AFR exome

AF:

0.00477

Gnomad AMR exome

AF:

0.000292

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.000112

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000170

Gnomad OTH exome

AF:

0.000677

GnomAD4 exome

AF:

0.000797

AC:

1161

AN:

1456582

Hom.:

Cov.:

AF XY:

0.00103

AC XY:

747

AN XY:

724636

show subpopulations

African (AFR)

AF:

0.00399

AC:

133

AN:

33372

American (AMR)

AF:

0.000314

AC:

AN:

44622

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

25988

East Asian (EAS)

AF:

0.0000257

AC:

AN:

38964

South Asian (SAS)

AF:

0.0103

AC:

886

AN:

86188

European-Finnish (FIN)

AF:

0.0000194

AC:

AN:

51632

Middle Eastern (MID)

AF:

0.000174

AC:

AN:

5742

European-Non Finnish (NFE)

AF:

0.0000757

AC:

AN:

1109952

Other (OTH)

AF:

0.000682

AC:

AN:

60122

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.476

Heterozygous variant carriers

165

248

330

413

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00166

AC:

251

AN:

150986

Hom.:

Cov.:

AF XY:

0.00178

AC XY:

131

AN XY:

73780

show subpopulations

African (AFR)

AF:

0.00437

AC:

180

AN:

41208

American (AMR)

AF:

0.000657

AC:

AN:

15210

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3464

East Asian (EAS)

AF:

0.00

AC:

AN:

4958

South Asian (SAS)

AF:

0.0115

AC:

AN:

4710

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10432

Middle Eastern (MID)

AF:

0.00

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.0000591

AC:

AN:

67700

Other (OTH)

AF:

0.00143

AC:

AN:

2104

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.498

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.000769

Hom.:

Bravo

AF:

0.00145

Asia WGS

AF:

0.00549

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:1

Jun 18, 2020

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Congenital myasthenic syndrome 8

Benign:1

Jan 29, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.65

CADD

Benign

0.14

(source)

DANN

Benign

0.46

PhyloP100

-5.8

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.2

Mutation Taster

=100/0

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

Age Distribution

Age Distribution

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

Other links and lift over