chr20-33408540-C-T
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Variant summary
Our verdict is Benign. Variant got -17 ACMG points: 0P and 17B. BP4_StrongBP6_Very_StrongBP7BS2
The NM_003098.3(SNTA1):c.1485G>A(p.Ser495=) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000684 in 1,461,832 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★).
Frequency
Genomes: not found (cov: 32)
Exomes 𝑓: 0.0000068 ( 0 hom. )
Consequence
SNTA1
NM_003098.3 synonymous
NM_003098.3 synonymous
Scores
2
Clinical Significance
Conservation
PhyloP100: -5.24
Genes affected
SNTA1 (HGNC:11167): (syntrophin alpha 1) Syntrophins are cytoplasmic peripheral membrane scaffold proteins that are components of the dystrophin-associated protein complex. This gene is a member of the syntrophin gene family and encodes the most common syntrophin isoform found in cardiac tissues. The N-terminal PDZ domain of this syntrophin protein interacts with the C-terminus of the pore-forming alpha subunit (SCN5A) of the cardiac sodium channel Nav1.5. This protein also associates cardiac sodium channels with the nitric oxide synthase-PMCA4b (plasma membrane Ca-ATPase subtype 4b) complex in cardiomyocytes. This gene is a susceptibility locus for Long-QT syndrome (LQT) - an inherited disorder associated with sudden cardiac death from arrhythmia - and sudden infant death syndrome (SIDS). This protein also associates with dystrophin and dystrophin-related proteins at the neuromuscular junction and alters intracellular calcium ion levels in muscle tissue. [provided by RefSeq, Jan 2013]
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ACMG classification
Classification made for transcript
Verdict is Benign. Variant got -17 ACMG points.
BP4
Computational evidence support a benign effect (BayesDel_noAF=-0.57).
BP6
Variant 20-33408540-C-T is Benign according to our data. Variant chr20-33408540-C-T is described in ClinVar as [Likely_benign]. Clinvar id is 1506114.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.
BP7
Synonymous conserved (PhyloP=-5.24 with no splicing effect.
BS2
High AC in GnomAdExome4 at 10 AD gene.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
SNTA1 | NM_003098.3 | c.1485G>A | p.Ser495= | synonymous_variant | 8/8 | ENST00000217381.3 | |
LOC124904889 | XR_007067567.1 | n.95-1513C>T | intron_variant, non_coding_transcript_variant |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
SNTA1 | ENST00000217381.3 | c.1485G>A | p.Ser495= | synonymous_variant | 8/8 | 1 | NM_003098.3 | P1 |
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD3 genomes
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GnomAD3 exomes AF: 0.00000796 AC: 2AN: 251408Hom.: 0 AF XY: 0.0000147 AC XY: 2AN XY: 135896
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GnomAD4 exome AF: 0.00000684 AC: 10AN: 1461832Hom.: 0 Cov.: 30 AF XY: 0.00000413 AC XY: 3AN XY: 727230
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GnomAD4 genome Cov.: 32
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ClinVar
Significance: Likely benign
Submissions summary: Benign:2
Revision: criteria provided, multiple submitters, no conflicts
LINK: link
Submissions by phenotype
Long QT syndrome Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Invitae | Oct 05, 2022 | - - |
Cardiovascular phenotype Benign:1
Likely benign, criteria provided, single submitter | clinical testing | Ambry Genetics | Dec 07, 2020 | This alteration is classified as likely benign based on a combination of the following: seen in unaffected individuals, population frequency, intact protein function, lack of segregation with disease, co-occurrence, RNA analysis, in silico models, amino acid conservation, lack of disease association in case-control studies, and/or the mechanism of disease or impacted region is inconsistent with a known cause of pathogenicity. - |
Computational scores
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Name
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BayesDel_noAF
Benign
CADD
Benign
DANN
Benign
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