U.S. flag

An official website of the United States government

NM_000321.3(RB1):c.1268G>A (p.Gly423Glu) AND Retinoblastoma

Germline classification:
Uncertain significance (4 submissions)
Last evaluated:
Nov 8, 2023
Review status:
2 stars out of maximum of 4 stars
criteria provided, multiple submitters, no conflicts
Somatic classification
of clinical impact:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Somatic classification
of oncogenicity:
None
Review status:
(0/4) 0 stars out of maximum of 4 stars
no assertion criteria provided
Record status:
current
Accession:
RCV000531874.11

Allele description [Variation Report for NM_000321.3(RB1):c.1268G>A (p.Gly423Glu)]

NM_000321.3(RB1):c.1268G>A (p.Gly423Glu)

Gene:
RB1:RB transcriptional corepressor 1 [Gene - OMIM - HGNC]
Variant type:
single nucleotide variant
Cytogenetic location:
13q14.2
Genomic location:
Preferred name:
NM_000321.3(RB1):c.1268G>A (p.Gly423Glu)
HGVS:
  • NC_000013.11:g.48376970G>A
  • NG_009009.1:g.78224G>A
  • NM_000321.3:c.1268G>AMANE SELECT
  • NP_000312.2:p.Gly423Glu
  • NP_000312.2:p.Gly423Glu
  • LRG_517t1:c.1268G>A
  • LRG_517:g.78224G>A
  • LRG_517p1:p.Gly423Glu
  • NC_000013.10:g.48951106G>A
  • NM_000321.2:c.1268G>A
Protein change:
G423E
Links:
dbSNP: rs748635133
NCBI 1000 Genomes Browser:
rs748635133
Molecular consequence:
  • NM_000321.3:c.1268G>A - missense variant - [Sequence Ontology: SO:0001583]
Observations:
3

Condition(s)

Name:
Retinoblastoma (RB1)
Synonyms:
Eye cancer, retinoblastoma; RETINOBLASTOMA, SOMATIC
Identifiers:
MONDO: MONDO:0008380; MeSH: D012175; MedGen: C0035335; Orphanet: 790; OMIM: 180200; Human Phenotype Ontology: HP:0009919

Recent activity

Your browsing activity is empty.

Activity recording is turned off.

Turn recording back on

See more...

Assertion and evidence details

Submission AccessionSubmitterReview Status
(Assertion method)
Clinical Significance
(Last evaluated)
OriginMethodCitations
SCV000629274Labcorp Genetics (formerly Invitae), Labcorp
criteria provided, single submitter

(Invitae Variant Classification Sherloc (09022015))
Uncertain significance
(Nov 8, 2023)
germlineclinical testing

PubMed (1)
[See all records that cite this PMID]

SCV002074924GenomeConnect, ClinGen
no classification provided
not providedunknownphenotyping only

SCV004357200Color Diagnostics, LLC DBA Color Health
criteria provided, single submitter

(ACMG Guidelines, 2015)
Uncertain significance
(Apr 5, 2023)
germlineclinical testing

PubMed (1)
[See all records that cite this PMID]

SCV004844654All of Us Research Program, National Institutes of Health
criteria provided, single submitter

(ACMG Guidelines, 2015)
Uncertain Significance
(Jul 19, 2023)
germlineclinical testing

PubMed (1)
[See all records that cite this PMID]

Summary from all submissions

EthnicityOriginAffectedIndividualsFamiliesChromosomes testedNumber TestedFamily historyMethod
not providedgermlineunknown3not providednot provided108544not providedclinical testing
not providedunknownunknownnot providednot providednot providednot providednot providedphenotyping only

Citations

PubMed

Sherloc: a comprehensive refinement of the ACMG-AMP variant classification criteria.

Nykamp K, Anderson M, Powers M, Garcia J, Herrera B, Ho YY, Kobayashi Y, Patil N, Thusberg J, Westbrook M; Invitae Clinical Genomics Group., Topper S.

Genet Med. 2017 Oct;19(10):1105-1117. doi: 10.1038/gim.2017.37. Epub 2017 May 11. Erratum in: Genet Med. 2020 Jan;22(1):240. doi: 10.1038/s41436-019-0624-9.

PubMed [citation]
PMID:
28492532
PMCID:
PMC5632818

Standards and guidelines for the interpretation of sequence variants: a joint consensus recommendation of the American College of Medical Genetics and Genomics and the Association for Molecular Pathology.

Richards S, Aziz N, Bale S, Bick D, Das S, Gastier-Foster J, Grody WW, Hegde M, Lyon E, Spector E, Voelkerding K, Rehm HL; ACMG Laboratory Quality Assurance Committee..

Genet Med. 2015 May;17(5):405-24. doi: 10.1038/gim.2015.30. Epub 2015 Mar 5.

PubMed [citation]
PMID:
25741868
PMCID:
PMC4544753

Details of each submission

From Labcorp Genetics (formerly Invitae), Labcorp, SCV000629274.6

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (1)

Description

This sequence change replaces glycine, which is neutral and non-polar, with glutamic acid, which is acidic and polar, at codon 423 of the RB1 protein (p.Gly423Glu). This variant is present in population databases (rs748635133, gnomAD 0.002%). 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: 421552). 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.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

From GenomeConnect, ClinGen, SCV002074924.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedphenotyping onlynot provided

Description

Variant interpreted as Uncertain significance and reported on 07-22-2020 by Lab or GTR ID 500031. GenomeConnect assertions are reported exactly as they appear on the patient-provided report from the testing laboratory. GenomeConnect staff make no attempt to reinterpret the clinical significance of the variant.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1unknownunknownnot providednot providednot providednot providednot providednot providednot provided

From Color Diagnostics, LLC DBA Color Health, SCV004357200.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not providednot providednot providednot providedclinical testing PubMed (1)

Description

This missense variant replaces glycine with glutamic acid at codon 423 of the RB1 protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with RB1-related disorders in the literature. This variant has been identified in 2/251018 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknownnot providednot providednot providednot providednot providednot providednot provided

From All of Us Research Program, National Institutes of Health, SCV004844654.1

#EthnicityIndividualsChromosomes TestedFamily HistoryMethodCitations
1not provided3not providednot providedclinical testing PubMed (1)

Description

This missense variant replaces glycine with glutamic acid at codon 423 of the RB1 protein. Computational prediction suggests that this variant may have deleterious impact on protein structure and function (internally defined REVEL score threshold >= 0.7, PMID: 27666373). To our knowledge, functional studies have not been reported for this variant. This variant has not been reported in individuals affected with RB1-related disorders in the literature. This variant has been identified in 2/251018 chromosomes in the general population by the Genome Aggregation Database (gnomAD). The available evidence is insufficient to determine the role of this variant in disease conclusively. Therefore, this variant is classified as a Variant of Uncertain Significance.

#SampleMethodObservation
OriginAffectedNumber testedTissuePurposeMethodIndividualsAllele frequencyFamiliesCo-occurrences
1germlineunknown108544not providednot provided3not providednot providednot provided

Last Updated: Oct 8, 2024