chr16-56192291-T-A
Variant summary
Our verdict is Likely pathogenic. Variant got 9 ACMG points: 9P and 0B. PM2PM5PP2PP3_Strong
The NM_020988.3(GNAO1):c.56T>A(p.Ile19Asn) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. 12/21 in silico tools predict a damaging outcome for this variant. 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. I19M) has been classified as Likely pathogenic.
Frequency
Consequence
NM_020988.3 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Likely_pathogenic. Variant got 9 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
GNAO1 | NM_020988.3 | c.56T>A | p.Ile19Asn | missense_variant | 1/9 | ENST00000262493.12 | |
GNAO1 | NM_138736.3 | c.56T>A | p.Ile19Asn | missense_variant | 1/8 | ||
GNAO1 | XR_007064866.1 | n.803T>A | non_coding_transcript_exon_variant | 1/9 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
GNAO1 | ENST00000262493.12 | c.56T>A | p.Ile19Asn | missense_variant | 1/9 | 1 | NM_020988.3 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 31
GnomAD4 exome Cov.: 29
GnomAD4 genome ? Cov.: 31
ClinVar
Submissions by phenotype
Early infantile epileptic encephalopathy with suppression bursts Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Mar 26, 2022 | 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. Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is expected to disrupt GNAO1 protein function. This variant has not been reported in the literature in individuals affected with GNAO1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces isoleucine, which is neutral and non-polar, with asparagine, which is neutral and polar, at codon 19 of the GNAO1 protein (p.Ile19Asn). - |
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at
Publications
No publications associated with this variant yet.