rs1555898776
Variant summary
Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2PP3
The NM_133642.5(LARGE1):c.1225G>A(p.Gly409Ser) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000137 in 1,461,886 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 31)
Exomes 𝑓: 0.0000014 ( 0 hom. )
Consequence
LARGE1
NM_133642.5 missense
NM_133642.5 missense
Scores
5
6
3
Clinical Significance
Conservation
PhyloP100: 7.38
Genes affected
LARGE1 (HGNC:6511): (LARGE xylosyl- and glucuronyltransferase 1) This gene encodes a member of the N-acetylglucosaminyltransferase gene family. It encodes a glycosyltransferase which participates in glycosylation of alpha-dystroglycan, and may carry out the synthesis of glycoprotein and glycosphingolipid sugar chains. It may also be involved in the addition of a repeated disaccharide unit. The protein encoded by this gene is the glycotransferase that adds the final xylose and glucuronic acid to alpha-dystroglycan and thereby allows alpha-dystroglycan to bind ligands including laminin 211 and neurexin. Mutations in this gene cause several forms of congenital muscular dystrophy characterized by cognitive disability and abnormal glycosylation of alpha-dystroglycan. Alternative splicing of this gene results in multiple transcript variants that encode the same protein. [provided by RefSeq, May 2018]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 3 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.815
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
LARGE1 | NM_133642.5 | c.1225G>A | p.Gly409Ser | missense_variant | 10/15 | ENST00000397394.8 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
LARGE1 | ENST00000397394.8 | c.1225G>A | p.Gly409Ser | missense_variant | 10/15 | 5 | NM_133642.5 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 31
GnomAD3 genomes
?
Cov.:
31
GnomAD4 exome AF: 0.00000137 AC: 2AN: 1461886Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0AN XY: 727242
GnomAD4 exome
AF:
AC:
2
AN:
1461886
Hom.:
Cov.:
32
AF XY:
AC XY:
0
AN XY:
727242
Gnomad4 AFR exome
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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
Muscular dystrophy-dystroglycanopathy type B6 Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Aug 16, 2022 | This sequence change replaces glycine, which is neutral and non-polar, with serine, which is neutral and polar, at codon 409 of the LARGE1 protein (p.Gly409Ser). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with LARGE1-related conditions. ClinVar contains an entry for this variant (Variation ID: 533117). Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Probably Damaging"; Align-GVGD: "Class C0"). 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. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Uncertain
Cadd
Pathogenic
Dann
Uncertain
Eigen
Uncertain
Eigen_PC
Uncertain
FATHMM_MKL
Uncertain
D
LIST_S2
Uncertain
D;D;D;.;D
M_CAP
Benign
D
MetaRNN
Pathogenic
D;D;D;D;D
MetaSVM
Benign
T
MutationTaster
Benign
D;D;D;D;D;D
PrimateAI
Pathogenic
D
Sift4G
Pathogenic
D;D;D;T;T
Polyphen
1.0
.;.;.;D;D
Vest4
0.85, 0.84
MutPred
0.58
.;.;.;Gain of helix (P = 0.132);Gain of helix (P = 0.132);
MVP
MPC
1.4
ClinPred
D
GERP RS
Varity_R
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