NM_198576.4:c.4731G>A

Variant names:

• chr1-1049782-G-A
• rs115885544
• NM_198576.4:c.4731G>A

Variant summary

Our verdict is Benign. The variant received -12 ACMG points: 0P and 12B. BP4_Strong BP6_Very_Strong

The NM_198576.4(AGRN):​c.4731G>A​(p.Pro1577Pro) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000226 in 1,592,886 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 Likely benign (★★).

• Frequency:
  • Genomes: 𝑓 0.000066 (0 hom., cov: 32)
  • Exomes 𝑓: 0.000018 (0 hom.)
• Consequence: AGRN NM_198576.4 synonymous
• Clinical Significance: Likely benign criteria provided, multiple submitters, no conflicts B:2
• Conservation: PhyloP100: -0.781
• Publications: 0 publications found

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

ACMG classification

Our verdict: Benign. The variant received -12 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.77).
• BP6: Variant 1-1049782-G-A is Benign according to our data. Variant chr1-1049782-G-A is described in ClinVar as [Likely_benign]. Clinvar id is 434110.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
AGRN	NM_198576.4	c.4731G>A	p.Pro1577Pro	synonymous_variant	Exon 26 of 36	ENST00000379370.7	NP_940978.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
AGRN	ENST00000379370.7	c.4731G>A	p.Pro1577Pro	synonymous_variant	Exon 26 of 36	1	NM_198576.4	ENSP00000368678.2
AGRN	ENST00000651234.1	c.4416G>A	p.Pro1472Pro	synonymous_variant	Exon 25 of 38			ENSP00000499046.1
AGRN	ENST00000652369.2	c.4416G>A	p.Pro1472Pro	synonymous_variant	Exon 25 of 35			ENSP00000498543.1
AGRN	ENST00000620552.4	c.4317G>A	p.Pro1439Pro	synonymous_variant	Exon 26 of 39	5		ENSP00000484607.1

Frequencies

GnomAD3 genomes AF: 0.0000660 AC: 10 AN: 151518 Hom.: 0 Cov.: 32

Gnomad AFR AF: 0.0000970

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: 0.0000885

Gnomad OTH AF: 0.00

GnomAD2 exomes AF: 0.0000145 AC: 3 AN: 206876 AF XY: 0.0000261

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.00

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.0000227

Gnomad OTH exome AF: 0.000192

GnomAD4 exome AF: 0.0000180 AC: 26 AN: 1441368 Hom.: 0 Cov.: 45 AF XY: 0.0000182 AC XY: 13 AN XY: 715492

African (AFR) AF: 0.00 AC: 0 AN: 33084

American (AMR) AF: 0.00 AC: 0 AN: 41402

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25574

East Asian (EAS) AF: 0.00 AC: 0 AN: 38814

South Asian (SAS) AF: 0.00 AC: 0 AN: 84580

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49782

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5690

European-Non Finnish (NFE) AF: 0.0000236 AC: 26 AN: 1102942

Other (OTH) AF: 0.00 AC: 0 AN: 59500

GnomAD4 genome AF: 0.0000660 AC: 10 AN: 151518 Hom.: 0 Cov.: 32 AF XY: 0.0000946 AC XY: 7 AN XY: 73996

African (AFR) AF: 0.0000970 AC: 4 AN: 41222

American (AMR) AF: 0.00 AC: 0 AN: 15230

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 3468

East Asian (EAS) AF: 0.00 AC: 0 AN: 5146

South Asian (SAS) AF: 0.00 AC: 0 AN: 4798

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 10562

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 316

European-Non Finnish (NFE) AF: 0.0000885 AC: 6 AN: 67784

Other (OTH) AF: 0.00 AC: 0 AN: 2084

Alfa AF: 0.0000757 Hom.: 0

Bravo AF: 0.0000378

ClinVar

Significance: Likely benign

Submissions summary: Benign:2

Revision: criteria provided, multiple submitters, no conflicts

Submissions by phenotype

not specified Benign:1

Aug 01, 2016

Genetic Services Laboratory, University of Chicago

Significance: Likely benign

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Congenital myasthenic syndrome 8 Benign:1

Dec 03, 2024

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Likely 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	-0.77
CADD	Benign	0.49
DANN	Benign	0.58
PhyloP100		-0.78
RBP_binding_hub_radar		0.92
RBP_regulation_power_radar		2.6
Mutation Taster		=100/0	polymorphism

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

Other links and lift over

dbSNP: rs115885544; hg19: chr1-985162;