rs137853294

Variant names:

• chr13-48459708-C-A
• NM_000321.3:c.1981C>A

Your query was ambiguous. Multiple possible variants found:

• chr13-48459708-C-A
• chr13-48459708-C-G
• chr13-48459708-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2 BP4

The NM_000321.3(RB1):​c.1981C>A​(p.Arg661Arg) variant causes a synonymous change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: not found (cov: 30)
• Consequence: RB1 NM_000321.3 synonymous
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.65

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]

ACMG classification

Verdict is Uncertain_significance. Variant got 1 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.17).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RB1	NM_000321.3	c.1981C>A	p.Arg661Arg	synonymous_variant	Exon 20 of 27	ENST00000267163.6	NP_000312.2
RB1	NM_001407165.1	c.1981C>A	p.Arg661Arg	synonymous_variant	Exon 20 of 27		NP_001394094.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RB1	ENST00000267163.6	c.1981C>A	p.Arg661Arg	synonymous_variant	Exon 20 of 27	1	NM_000321.3	ENSP00000267163.4
RB1	ENST00000650461.1	c.1981C>A	p.Arg661Arg	synonymous_variant	Exon 20 of 27			ENSP00000497193.1
RB1	ENST00000643064.1	c.192+78265C>A		intron_variant	Intron 1 of 1			ENSP00000496005.1

Frequencies

GnomAD3 genomes Cov.: 30

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 30

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.17
CADD	Benign	11
DANN	Benign	0.74
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

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

Publications

No publications associated with this variant yet.

Other links and lift over

hg19: chr13-49033844;