rs1555279223
Variant summary
Our verdict is Uncertain significance. Variant got 2 ACMG points: 2P and 0B. PM2
The NM_000321.3(RB1):c.78_83dup(p.Pro28_Pro29dup) variant causes a inframe insertion change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000743 in 1,346,554 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★★). Synonymous variant affecting the same amino acid position (i.e. P25P) has been classified as Likely benign.
Frequency
Consequence
NM_000321.3 inframe_insertion
Scores
Clinical Significance
Conservation
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ACMG classification
Verdict is Uncertain_significance. Variant got 2 ACMG points.
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
RB1 | NM_000321.3 | c.78_83dup | p.Pro28_Pro29dup | inframe_insertion | 1/27 | ENST00000267163.6 | |
RB1 | NM_001407165.1 | c.78_83dup | p.Pro28_Pro29dup | inframe_insertion | 1/27 | ||
RB1 | NM_001407166.1 | c.78_83dup | p.Pro28_Pro29dup | inframe_insertion | 1/17 | ||
RB1 | NM_001407167.1 | c.78_83dup | p.Pro28_Pro29dup | inframe_insertion | 1/3 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
RB1 | ENST00000267163.6 | c.78_83dup | p.Pro28_Pro29dup | inframe_insertion | 1/27 | 1 | NM_000321.3 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 32
GnomAD4 exome AF: 7.43e-7 AC: 1AN: 1346554Hom.: 0 Cov.: 31 AF XY: 0.00000151 AC XY: 1AN XY: 664122
GnomAD4 genome ? Cov.: 32
ClinVar
Submissions by phenotype
Retinoblastoma Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Jul 14, 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. Experimental studies and prediction algorithms are not available or were not evaluated, and the functional significance of this variant is currently unknown. ClinVar contains an entry for this variant (Variation ID: 527901). This variant has not been reported in the literature in individuals affected with RB1-related conditions. This variant is not present in population databases (gnomAD no frequency). This variant, c.78_83dup, results in the insertion of 2 amino acid(s) of the RB1 protein (p.Pro28_Pro29dup), but otherwise preserves the integrity of the reading frame. - |
Hereditary cancer-predisposing syndrome Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | May 27, 2022 | The c.78_83dupGCCCCC variant (also known as p.P28_P29dup), located in coding exon 1 of the RB1 gene, results from an in-frame duplication of GCCCCC at nucleotide positions 78 to 83. This results in the duplication of 2 extra residues (PP) between codons 28 and 29. This amino acid region is well conserved in available vertebrate species. In addition, this alteration is predicted to be neutral by in silico analysis (Choi Y et al. PLoS ONE. 2012; 7(10):e46688). 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