13-48307377-G-C
Variant summary
Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate
The NM_000321.3(RB1):c.235G>C(p.Glu79Gln) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,172 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★).
Frequency
Consequence
NM_000321.3 missense
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 0 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | Exon rank | MANE | Protein | UniProt |
---|---|---|---|---|---|---|---|---|
RB1 | NM_000321.3 | c.235G>C | p.Glu79Gln | missense_variant | Exon 2 of 27 | ENST00000267163.6 | NP_000312.2 | |
RB1 | NM_001407165.1 | c.235G>C | p.Glu79Gln | missense_variant | Exon 2 of 27 | NP_001394094.1 | ||
RB1 | NM_001407166.1 | c.235G>C | p.Glu79Gln | missense_variant | Exon 2 of 17 | NP_001394095.1 | ||
RB1 | NM_001407167.1 | c.235G>C | p.Glu79Gln | missense_variant | Exon 2 of 3 | NP_001394096.1 |
Ensembl
Frequencies
GnomAD3 genomes Cov.: 32
GnomAD4 exome AF: 6.84e-7 AC: 1AN: 1461172Hom.: 0 Cov.: 30 AF XY: 0.00 AC XY: 0AN XY: 726938
GnomAD4 genome Cov.: 32
ClinVar
Submissions by phenotype
Retinoblastoma Uncertain:1
This sequence change replaces glutamic acid, which is acidic and polar, with glutamine, which is neutral and polar, at codon 79 of the RB1 protein (p.Glu79Gln). This variant is not present in population databases (gnomAD no frequency). This variant has not been reported in the literature in individuals affected with RB1-related conditions. ClinVar contains an entry for this variant (Variation ID: 410946). 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 not expected to disrupt RB1 protein function with a negative predictive value of 80%. 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. -
Malignant tumor of urinary bladder Uncertain:1
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not provided Uncertain:1
Not observed at significant frequency in large population cohorts (gnomAD); In silico analysis supports that this missense variant does not alter protein structure/function; Has not been previously published as pathogenic or benign to our knowledge; This variant is associated with the following publications: (PMID: 23516486) -
Hereditary cancer-predisposing syndrome Uncertain:1
The p.E79Q variant (also known as c.235G>C), located in coding exon 2 of the RB1 gene, results from a G to C substitution at nucleotide position 235. The glutamic acid at codon 79 is replaced by glutamine, an amino acid with highly similar properties. This amino acid position is well conserved in available vertebrate species. In addition, this alteration is predicted to be tolerated by in silico analysis. Since supporting evidence is limited at this time, the clinical significance of this alteration remains unclear. -
Computational scores
Source:
Splicing
Find out detailed SpliceAI scores and Pangolin per-transcript scores at