rs138031468
Variant summary
Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2
The NM_198576.4(AGRN):c.1123G>A(p.Ala375Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. 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. A375S) has been classified as Likely benign.
Frequency
Genomes: not found (cov: 31)
Consequence
AGRN
NM_198576.4 missense
NM_198576.4 missense
Scores
6
11
Clinical Significance
Conservation
PhyloP100: 1.49
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]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 2 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
AGRN | NM_198576.4 | c.1123G>A | p.Ala375Thr | missense_variant | 6/36 | ENST00000379370.7 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
AGRN | ENST00000379370.7 | c.1123G>A | p.Ala375Thr | missense_variant | 6/36 | 1 | NM_198576.4 | P1 | |
AGRN | ENST00000651234.1 | c.808G>A | p.Ala270Thr | missense_variant | 5/38 | ||||
AGRN | ENST00000652369.1 | c.808G>A | p.Ala270Thr | missense_variant | 5/35 | ||||
AGRN | ENST00000620552.4 | c.709G>A | p.Ala237Thr | missense_variant | 6/39 | 5 |
Frequencies
GnomAD3 genomes ? Cov.: 31
GnomAD3 genomes
?
Cov.:
31
GnomAD4 exome Cov.: 33
GnomAD4 exome
Cov.:
33
GnomAD4 genome ? Cov.: 31
GnomAD4 genome
?
Cov.:
31
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Congenital myasthenic syndrome 8 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Jun 07, 2023 | In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. An algorithm developed to predict the effect of missense changes on protein structure and function (PolyPhen-2) suggests that this variant is likely to be disruptive. This variant has not been reported in the literature in individuals affected with AGRN-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 375 of the AGRN protein (p.Ala375Thr). - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
BayesDel_addAF
Benign
T
BayesDel_noAF
Benign
Cadd
Benign
Dann
Uncertain
Eigen
Benign
Eigen_PC
Benign
FATHMM_MKL
Benign
N
LIST_S2
Uncertain
D;D
M_CAP
Uncertain
D
MetaRNN
Uncertain
D;D
MetaSVM
Benign
T
MutationAssessor
Benign
L;.
MutationTaster
Benign
N
PrimateAI
Uncertain
T
PROVEAN
Benign
N;.
REVEL
Benign
Sift
Uncertain
D;.
Sift4G
Benign
T;T
Vest4
MutPred
Gain of phosphorylation at A375 (P = 0.0814);.;
MVP
MPC
ClinPred
D
GERP RS
RBP_binding_hub_radar
RBP_regulation_power_radar
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at