1-1041349-G-T

Variant names:

• chr1-1041349-G-T
• rs1318084676
• NM_198576.4:c.904G>T

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_198576.4(AGRN):​c.904G>T​(p.Ala302Ser) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A302G) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0 (0 hom.)
  • Failed GnomAD Quality Control
• Consequence: AGRN NM_198576.4 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.24
• 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: DEFINITIVE, STRONG Submitted by: ClinGen, 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: Uncertain_significance. The variant received 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_198576.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AGRN	NM_198576.4	MANE Select	c.904G>T	p.Ala302Ser	missense	Exon 5 of 36	NP_940978.2
	AGRN	NM_001305275.2		c.904G>T	p.Ala302Ser	missense	Exon 5 of 39	NP_001292204.1	O00468-1
	AGRN	NM_001364727.2		c.589G>T	p.Ala197Ser	missense	Exon 4 of 36	NP_001351656.1

Ensembl Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	AGRN	ENST00000379370.7	TSL:1 MANE Select	c.904G>T	p.Ala302Ser	missense	Exon 5 of 36	ENSP00000368678.2	O00468-6
	AGRN	ENST00000651234.1		c.589G>T	p.Ala197Ser	missense	Exon 4 of 38	ENSP00000499046.1	A0A494C1I6
	AGRN	ENST00000652369.2		c.589G>T	p.Ala197Ser	missense	Exon 4 of 35	ENSP00000498543.1	A0A494C0G5

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Data not reliable, filtered out with message: AC0 AF: 0.00 AC: 0 AN: 1377006 Hom.: 0 Cov.: 33 AF XY: 0.00 AC XY: 0 AN XY: 679978

African (AFR) AF: 0.00 AC: 0 AN: 31032

American (AMR) AF: 0.00 AC: 0 AN: 33870

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 24298

East Asian (EAS) AF: 0.00 AC: 0 AN: 35924

South Asian (SAS) AF: 0.00 AC: 0 AN: 78338

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 33694

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5644

European-Non Finnish (NFE) AF: 0.00 AC: 0 AN: 1076798

Other (OTH) AF: 0.00 AC: 0 AN: 57408

GnomAD4 genome Cov.: 31

ClinVar

ClinVar submissions

Significance: Uncertain significance

Revision: criteria provided, single submitter

Pathogenic	VUS	Benign	Condition
-	1	-	Congenital myasthenic syndrome 8 (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.16
BayesDel_addAF	Benign	-0.12	T
BayesDel_noAF	Benign	-0.42
CADD	Uncertain	24
DANN	Uncertain	0.99
Eigen	Uncertain	0.39
Eigen_PC	Uncertain	0.30
FATHMM_MKL	Uncertain	0.90	D
LIST_S2	Benign	0.85	T
M_CAP	Uncertain	0.12	D
MetaRNN	Uncertain	0.61	D
MetaSVM	Benign	-1.2	T
MutationAssessor	Benign	1.8	L
PhyloP100		5.2
PrimateAI	Uncertain	0.71	T
PROVEAN	Benign	-1.6	N
REVEL	Benign	0.25
Sift	Benign	0.11	T
Sift4G	Benign	0.091	T
Vest4		0.37
MutPred		0.56		Gain of phosphorylation at A302 (P = 0.0269)
MVP		0.66
MPC		1.0
ClinPred		0.93	D
GERP RS		4.7
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.9
gMVP		0.47
Mutation Taster		=70/30	polymorphism

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

Other links and lift over

dbSNP: rs1318084676; hg19: chr1-976729;