rs1060503083
Variant summary
Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM1PM2PP3_Moderate
The NM_000321.3(RB1):c.2224G>C(p.Val742Leu) 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. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 24)
Consequence
RB1
NM_000321.3 missense
NM_000321.3 missense
Scores
13
5
1
Clinical Significance
Conservation
PhyloP100: 9.60
Genes affected
RB1 (HGNC:9884): (RB transcriptional corepressor 1) The protein encoded by this gene is a negative regulator of the cell cycle and was the first tumor suppressor gene found. The encoded protein also stabilizes constitutive heterochromatin to maintain the overall chromatin structure. The active, hypophosphorylated form of the protein binds transcription factor E2F1. Defects in this gene are a cause of childhood cancer retinoblastoma (RB), bladder cancer, and osteogenic sarcoma. [provided by RefSeq, Jul 2008]
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ACMG classification
Classification made for transcript
Verdict is Likely_pathogenic. Variant got 6 ACMG points.
PM1
?
In a region_of_interest Domain B (size 131) in uniprot entity RB_HUMAN there are 40 pathogenic changes around while only 13 benign (75%) in NM_000321.3
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.887
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
RB1 | NM_000321.3 | c.2224G>C | p.Val742Leu | missense_variant | 22/27 | ENST00000267163.6 | |
RB1 | NM_001407165.1 | c.2224G>C | p.Val742Leu | missense_variant | 22/27 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
RB1 | ENST00000267163.6 | c.2224G>C | p.Val742Leu | missense_variant | 22/27 | 1 | NM_000321.3 | P1 | |
RB1 | ENST00000650461.1 | c.2224G>C | p.Val742Leu | missense_variant | 22/27 | ||||
RB1 | ENST00000643064.1 | c.194+83567G>C | intron_variant |
Frequencies
GnomAD3 genomes ? Cov.: 24
GnomAD3 genomes
?
Cov.:
24
GnomAD4 exome Cov.: 33
GnomAD4 exome
Cov.:
33
GnomAD4 genome ? Cov.: 24
GnomAD4 genome
?
Cov.:
24
ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
Retinoblastoma Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Invitae | Oct 31, 2016 | In summary, this variant is a novel missense change with uncertain impact on protein function. It has been classified as a Variant of Uncertain Significance. Algorithms developed to predict the effect of missense changes on protein structure and function (SIFT, PolyPhen-2, Align-GVGD) all suggest that this variant is likely to be disruptive, but these predictions have not been confirmed by published functional studies. This variant is not present in population databases (ExAC no frequency) and has not been reported in the literature in individuals with a RB1-related disease. This sequence change replaces valine with leucine at codon 742 of the RB1 protein (p.Val742Leu). The valine residue is highly conserved and there is a small physicochemical difference between valine and leucine. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Pathogenic
D
BayesDel_noAF
Pathogenic
Cadd
Pathogenic
Dann
Uncertain
DEOGEN2
Pathogenic
D;.
Eigen
Pathogenic
Eigen_PC
Pathogenic
FATHMM_MKL
Pathogenic
D
LIST_S2
Uncertain
D;D
M_CAP
Pathogenic
D
MetaRNN
Pathogenic
D;D
MetaSVM
Pathogenic
D
MutationAssessor
Pathogenic
M;.
MutationTaster
Benign
D
PrimateAI
Uncertain
T
PROVEAN
Uncertain
N;.
REVEL
Pathogenic
Sift
Uncertain
D;.
Sift4G
Pathogenic
D;.
Polyphen
D;.
Vest4
MutPred
Gain of helix (P = 0.0425);Gain of helix (P = 0.0425);
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
Name
Calibrated prediction
Score
Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at