rs770100636

chr13-48360022-G-Achr13-48360022-G-Cchr13-48360022-G-T

Variant summary

Our verdict is Likely benign. Variant got -3 ACMG points: 0P and 3B. BP4_ModerateBP6

The NM_000321.3(RB1):c.613G>A(p.Val205Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000372 in 1,611,358 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 16/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. V205V) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 32)

Exomes 𝑓: 0.0000034 ( 0 hom. )

Consequence

RB1
NM_000321.3 missense

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:1B:1

Conservation

PhyloP100: 2.25

Variant links:

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]

RB1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -3 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.08108339).

BP6

Variant 13-48360022-G-A is Benign according to our data. Variant chr13-48360022-G-A is described in ClinVar as [Conflicting_classifications_of_pathogenicity]. Clinvar id is 410919.We mark this variant Likely_benign, oryginal submissions are: {Likely_benign=1, Uncertain_significance=1}.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE
RB1	NM_000321.3 linkuse as main transcript	c.613G>A	p.Val205Ile	missense_variant	7/27	ENST00000267163.6
RB1	NM_001407165.1 linkuse as main transcript	c.613G>A	p.Val205Ile	missense_variant	7/27
RB1	NM_001407166.1 linkuse as main transcript	c.613G>A	p.Val205Ile	missense_variant	7/17

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris
RB1	ENST00000267163.6 linkuse as main transcript	c.613G>A	p.Val205Ile	missense_variant	7/27	1	NM_000321.3	P1
RB1	ENST00000467505.5 linkuse as main transcript	c.143G>A	p.Ser48Asn	missense_variant, NMD_transcript_variant	2/3	1
RB1	ENST00000650461.1 linkuse as main transcript	c.613G>A	p.Val205Ile	missense_variant	7/27
RB1	ENST00000525036.1 linkuse as main transcript	n.775G>A		non_coding_transcript_exon_variant	7/7	3

Frequencies

GnomAD3 genomes

AF:

0.00000659

AC:

AN:

151646

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.00000800

AC:

AN:

250068

Hom.:

AF XY:

0.00000740

AC XY:

AN XY:

135224

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000177

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.00000343

AC:

AN:

1459712

Hom.:

Cov.:

AF XY:

0.00000413

AC XY:

AN XY:

726242

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000360

Gnomad4 OTH exome

AF:

0.0000166

GnomAD4 genome

AF:

0.00000659

AC:

AN:

151646

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74012

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

ExAC

AF:

0.00000824

AC:

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Conflicting classifications of pathogenicity

Submissions summary: Uncertain:1Benign:1

Revision: criteria provided, conflicting classifications

LINK: link

Submissions by phenotype

Retinoblastoma

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Aug 23, 2023

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 not expected to disrupt RB1 protein function. ClinVar contains an entry for this variant (Variation ID: 410919). This variant has not been reported in the literature in individuals affected with RB1-related conditions. This variant is present in population databases (rs770100636, gnomAD 0.002%). This sequence change replaces valine, which is neutral and non-polar, with isoleucine, which is neutral and non-polar, at codon 205 of the RB1 protein (p.Val205Ile). -

Hereditary cancer-predisposing syndrome

Benign:1

Likely benign, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 16, 2024

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

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.079

BayesDel_addAF

Benign

-0.17

BayesDel_noAF

Benign

-0.46

Cadd

Benign

Dann

Benign

0.90

DEOGEN2

Benign

0.29

T;.

Eigen

Benign

-0.22

Eigen_PC

Benign

0.0039

FATHMM_MKL

Benign

0.69

LIST_S2

Benign

0.79

T;T

M_CAP

Benign

0.011

MetaRNN

Benign

0.081

T;T

MetaSVM

Benign

-0.81

MutationAssessor

Benign

0.090

N;.

MutationTaster

Benign

0.67

PrimateAI

Benign

0.36

PROVEAN

Benign

-0.070

N;.

REVEL

Benign

0.084

Sift

Benign

0.59

T;.

Sift4G

Benign

0.53

T;.

Polyphen

0.0090

B;.

Vest4

0.20

MutPred

0.40

Gain of catalytic residue at A201 (P = 0.0168);Gain of catalytic residue at A201 (P = 0.0168);

MVP

0.63

MPC

0.38

ClinPred

0.20

GERP RS

4.7

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.044

gMVP

0.097

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.0

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

LitVar

Below is the list of publications found by LitVar. It may be empty.

Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Submissions by phenotype

Computational scores

Splicing

Publications

LitVar

Other links and lift over