rs60407644
Variant summary
Our verdict is Likely pathogenic. Variant got 7 ACMG points: 7P and 0B. PM1PM2PP3_ModeratePP5
The NM_000023.4(SGCA):c.157G>A(p.Ala53Thr) variant causes a missense, splice region change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000752 in 1,461,860 control chromosomes in the GnomAD database, with no homozygous occurrence. 2/2 splice prediction tools predicting alterations to normal splicing. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. A53S) has been classified as Uncertain significance.
Frequency
Consequence
NM_000023.4 missense, splice_region
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_pathogenic. Variant got 7 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SGCA | NM_000023.4 | c.157G>A | p.Ala53Thr | missense_variant, splice_region_variant | 2/10 | ENST00000262018.8 | |
SGCA | NM_001135697.3 | c.157G>A | p.Ala53Thr | missense_variant, splice_region_variant | 2/8 | ||
SGCA | NR_135553.2 | n.193G>A | splice_region_variant, non_coding_transcript_exon_variant | 2/9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SGCA | ENST00000262018.8 | c.157G>A | p.Ala53Thr | missense_variant, splice_region_variant | 2/10 | 1 | NM_000023.4 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD3 exomes AF: 0.00000796 AC: 2AN: 251404Hom.: 0 AF XY: 0.00 AC XY: 0AN XY: 135896
GnomAD4 exome AF: 0.00000752 AC: 11AN: 1461860Hom.: 0 Cov.: 32 AF XY: 0.00000963 AC XY: 7AN XY: 727238
GnomAD4 genome ? Cov.: 32
ClinVar
Submissions by phenotype
Autosomal recessive limb-girdle muscular dystrophy type 2D Pathogenic:3
Likely pathogenic, criteria provided, single submitter | clinical testing | Revvity Omics, Revvity | Jan 16, 2020 | - - |
Pathogenic, criteria provided, single submitter | clinical testing | Invitae | Mar 20, 2023 | This sequence change replaces alanine, which is neutral and non-polar, with threonine, which is neutral and polar, at codon 53 of the SGCA protein (p.Ala53Thr). This variant also falls at the last nucleotide of exon 2, which is part of the consensus splice site for this exon. For these reasons, this variant has been classified as Pathogenic. Variants that disrupt the consensus splice site are a relatively common cause of aberrant splicing (PMID: 17576681, 9536098). Algorithms developed to predict the effect of sequence changes on RNA splicing suggest that this variant may disrupt the consensus splice site. 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 tolerated. ClinVar contains an entry for this variant (Variation ID: 281859). This missense change has been observed in individual(s) with limb girdle muscular dystrophy (LGMD) (PMID: 11693784, 16616845, 18285821; Invitae). In at least one individual the data is consistent with being in trans (on the opposite chromosome) from a pathogenic variant. It has also been observed to segregate with disease in related individuals. This variant is present in population databases (rs60407644, gnomAD 0.006%). - |
Likely pathogenic, criteria provided, single submitter | clinical testing | Baylor Genetics | Sep 06, 2023 | - - |
not provided Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Eurofins Ntd Llc (ga) | Jul 30, 2015 | - - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at