1-1044214-C-G

Position:

• chr1-1044214-C-G

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_198576.4(AGRN):​c.2105C>G​(p.Pro702Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,460,816 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/19 in silico tools predict a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: AGRN NM_198576.4 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.08

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.22504675).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
AGRN	NM_198576.4	c.2105C>G	p.Pro702Arg	missense_variant	11/36	ENST00000379370.7	NP_940978.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
AGRN	ENST00000379370.7	c.2105C>G	p.Pro702Arg	missense_variant	11/36	1	NM_198576.4	ENSP00000368678	P1
AGRN	ENST00000651234.1	c.1790C>G	p.Pro597Arg	missense_variant	10/38			ENSP00000499046
AGRN	ENST00000652369.1	c.1790C>G	p.Pro597Arg	missense_variant	10/35			ENSP00000498543
AGRN	ENST00000620552.4	c.1691C>G	p.Pro564Arg	missense_variant	11/39	5		ENSP00000484607

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD3 exomes AF: 0.00000799 AC: 2 AN: 250446 Hom.: 0 AF XY: 0.0000147 AC XY: 2 AN XY: 135718

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000578

Gnomad ASJ exome AF: 0.00

Gnomad EAS exome AF: 0.00

Gnomad SAS exome AF: 0.00

Gnomad FIN exome AF: 0.00

Gnomad NFE exome AF: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1460816 Hom.: 0 Cov.: 35 AF XY: 0.00000275 AC XY: 2 AN XY: 726754

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000671

Gnomad4 ASJ exome AF: 0.00

Gnomad4 EAS exome AF: 0.00

Gnomad4 SAS exome AF: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 33

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_addAF	Benign	-0.31	T
BayesDel_noAF	Benign	-0.50
CADD	Benign	17
DANN	Benign	0.16
Eigen	Benign	-0.50
Eigen_PC	Benign	-0.27
FATHMM_MKL	Uncertain	0.77	D
LIST_S2	Uncertain	0.88	D;D
M_CAP	Benign	0.0072	T
MetaRNN	Benign	0.23	T;T
MetaSVM	Benign	-1.0	T
MutationAssessor	Benign	-0.84	N;.
MutationTaster	Benign	0.86	D
PrimateAI	Benign	0.38	T
PROVEAN	Benign	-0.55	N;.
REVEL	Benign	0.052
Sift	Benign	0.38	T;.
Sift4G	Benign	0.82	T;T
Vest4		0.45
MutPred		0.22		Loss of catalytic residue at G701 (P = 0.0827);.;
MVP		0.57
MPC		0.58
ClinPred		0.16	T
GERP RS		3.6
gMVP		0.40

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.060		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

Other links and lift over

dbSNP: rs149814455; hg19: chr1-979594;