rs573919387
Positions:
Variant summary
Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM2PP3_Moderate
The NM_000232.5(SGCB):āc.940T>Cā(p.Cys314Arg) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000186 in 1,614,044 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 (ā ).
Frequency
Genomes: š 0.0000066 ( 0 hom., cov: 32)
Exomes š: 0.0000014 ( 0 hom. )
Consequence
SGCB
NM_000232.5 missense
NM_000232.5 missense
Scores
14
2
3
Clinical Significance
Conservation
PhyloP100: 9.11
Genes affected
SGCB (HGNC:10806): (sarcoglycan beta) This gene encodes a member of the sarcoglycan family. Sarcoglycans are transmembrane components in the dystrophin-glycoprotein complex which help stabilize the muscle fiber membranes and link the muscle cytoskeleton to the extracellular matrix. Mutations in this gene have been associated with limb-girdle muscular dystrophy.[provided by RefSeq, Oct 2008]
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ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 6 ACMG points.
PM1
?
In a topological_domain Extracellular (size 231) in uniprot entity SGCB_HUMAN there are 66 pathogenic changes around while only 6 benign (92%) in NM_000232.5
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.908
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SGCB | NM_000232.5 | c.940T>C | p.Cys314Arg | missense_variant | 6/6 | ENST00000381431.10 | |
SGCB | XM_047416074.1 | c.730T>C | p.Cys244Arg | missense_variant | 5/5 | ||
SGCB | XM_047416075.1 | c.643T>C | p.Cys215Arg | missense_variant | 5/5 | ||
SGCB | XM_047416076.1 | c.643T>C | p.Cys215Arg | missense_variant | 5/5 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SGCB | ENST00000381431.10 | c.940T>C | p.Cys314Arg | missense_variant | 6/6 | 1 | NM_000232.5 | P1 |
Frequencies
GnomAD3 genomes ? AF: 0.00000657 AC: 1AN: 152198Hom.: 0 Cov.: 32
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GnomAD3 exomes AF: 0.00000795 AC: 2AN: 251486Hom.: 0 AF XY: 0.00000736 AC XY: 1AN XY: 135918
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GnomAD4 exome AF: 0.00000137 AC: 2AN: 1461846Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1AN XY: 727236
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GnomAD4 genome ? AF: 0.00000657 AC: 1AN: 152198Hom.: 0 Cov.: 32 AF XY: 0.0000134 AC XY: 1AN XY: 74358
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Autosomal recessive limb-girdle muscular dystrophy type 2E Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Aug 13, 2021 | This sequence change replaces cysteine with arginine at codon 314 of the SGCB protein (p.Cys314Arg). The cysteine residue is highly conserved and there is a large physicochemical difference between cysteine and arginine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals affected with SGCB-related conditions. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive. 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
Pathogenic
CADD
Pathogenic
DANN
Uncertain
DEOGEN2
Pathogenic
D
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Benign
T
M_CAP
Pathogenic
D
MetaRNN
Pathogenic
D
MetaSVM
Pathogenic
D
MutationAssessor
Benign
L
MutationTaster
Benign
D;D
PrimateAI
Uncertain
T
PROVEAN
Pathogenic
D
REVEL
Pathogenic
Sift
Pathogenic
D
Sift4G
Pathogenic
D
Polyphen
D
Vest4
MutPred
Gain of disorder (P = 0.025);
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
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SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at