1-1041183-C-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.738C>T(p.Asp246Asp) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00105 in 1,438,034 control chromosomes in the GnomAD database, including 28 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).

Frequency

Genomes: 𝑓 0.0076 ( 21 hom., cov: 31)

Exomes 𝑓: 0.00029 ( 7 hom. )

Consequence

AGRN
NM_198576.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:5

Conservation

PhyloP100: 0.532

Publications

1 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=-0.54).

BP6

Variant 1-1041183-C-T is Benign according to our data. Variant chr1-1041183-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 263203.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=0.532 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00756 (1139/150740) while in subpopulation AFR AF = 0.0262 (1069/40756). AF 95% confidence interval is 0.0249. There are 21 homozygotes in GnomAd4. There are 545 alleles in the male GnomAd4 subpopulation. Median coverage is 31. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 21 AR,AD gene

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AGRN	NM_198576.4 link	c.738C>T	p.Asp246Asp	synonymous_variant	Exon 5 of 36	ENST00000379370.7	NP_940978.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AGRN	ENST00000379370.7 link	c.738C>T	p.Asp246Asp	synonymous_variant	Exon 5 of 36	1	NM_198576.4	ENSP00000368678.2

Frequencies

GnomAD3 genomes

AF:

0.00751

AC:

1131

AN:

150642

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0261

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00355

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00637

Gnomad NFE

AF:

0.0000591

Gnomad OTH

AF:

0.00482

GnomAD2 exomes

AF:

0.000746

AC:

AN:

67026

AF XY:

0.000382

show subpopulations

Gnomad AFR exome

AF:

0.0313

Gnomad AMR exome

AF:

0.00142

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.000117

Gnomad OTH exome

AF:

0.00103

GnomAD4 exome

AF:

0.000287

AC:

370

AN:

1287294

Hom.:

Cov.:

AF XY:

0.000257

AC XY:

163

AN XY:

634806

show subpopulations

African (AFR)

AF:

0.0102

AC:

250

AN:

24412

American (AMR)

AF:

0.00112

AC:

AN:

22392

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

21658

East Asian (EAS)

AF:

0.00

AC:

AN:

26858

South Asian (SAS)

AF:

0.0000717

AC:

AN:

69730

European-Finnish (FIN)

AF:

0.00

AC:

AN:

32264

Middle Eastern (MID)

AF:

0.00165

AC:

AN:

4244

European-Non Finnish (NFE)

AF:

0.0000126

AC:

AN:

1033216

Other (OTH)

AF:

0.00133

AC:

AN:

52520

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.514

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome 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

GnomAD4 genome

AF:

0.00756

AC:

1139

AN:

150740

Hom.:

Cov.:

AF XY:

0.00739

AC XY:

545

AN XY:

73706

show subpopulations

African (AFR)

AF:

0.0262

AC:

1069

AN:

40756

American (AMR)

AF:

0.00355

AC:

AN:

15212

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3460

East Asian (EAS)

AF:

0.00

AC:

AN:

5144

South Asian (SAS)

AF:

0.00

AC:

AN:

4820

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10374

Middle Eastern (MID)

AF:

0.00685

AC:

AN:

292

European-Non Finnish (NFE)

AF:

0.0000591

AC:

AN:

67672

Other (OTH)

AF:

0.00477

AC:

AN:

2098

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.514

Heterozygous variant carriers

100

151

201

251

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome 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

Alfa

AF:

0.00421

Hom.:

ClinVar

Significance: Benign/Likely benign

Submissions summary: Benign:5

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Benign:2

Dec 14, 2020

GeneDx

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Breakthrough Genomics, Breakthrough Genomics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:not provided

Congenital myasthenic syndrome 8

Benign:2

Dec 20, 2021

Fulgent Genetics, Fulgent Genetics

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

Jan 31, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance:Likely benign

Review Status:criteria provided, single submitter

Collection Method:clinical testing

not specified

Benign:1

PreventionGenetics, part of Exact Sciences

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

-0.54

CADD

Benign

6.1

(source)

DANN

Benign

0.86

PhyloP100

0.53

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Mutation Taster

=100/0

polymorphism

(source)

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

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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