13-48342611-C-A

Variant names:

• chr13-48342611-C-A
• NM_000321.3:c.277C>A

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_000321.3(RB1):​c.277C>A​(p.Gln93Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000688 in 1,453,170 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 15/21 in silico tools predict 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: 32)
  • Exomes 𝑓: 6.9e-7 (0 hom.)
• Consequence: RB1 NM_000321.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.18

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 0 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• BP4: Computational evidence support a benign effect (MetaRNN=0.14024204).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RB1	NM_000321.3	c.277C>A	p.Gln93Lys	missense_variant	Exon 3 of 27	ENST00000267163.6	NP_000312.2
RB1	NM_001407165.1	c.277C>A	p.Gln93Lys	missense_variant	Exon 3 of 27		NP_001394094.1
RB1	NM_001407166.1	c.277C>A	p.Gln93Lys	missense_variant	Exon 3 of 17		NP_001394095.1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RB1	ENST00000267163.6	c.277C>A	p.Gln93Lys	missense_variant	Exon 3 of 27	1	NM_000321.3	ENSP00000267163.4
RB1	ENST00000467505.5	n.138-17406C>A		intron_variant	Intron 1 of 2	1		ENSP00000434702.1
RB1	ENST00000650461.1	c.277C>A	p.Gln93Lys	missense_variant	Exon 3 of 27			ENSP00000497193.1
RB1	ENST00000525036.1	n.439C>A		non_coding_transcript_exon_variant	Exon 3 of 7	3

Frequencies

GnomAD3 genomes Cov.: 32

GnomAD4 exome AF: 6.88e-7 AC: 1 AN: 1453170 Hom.: 0 Cov.: 29 AF XY: 0.00 AC XY: 0 AN XY: 723456

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: 9.05e-7

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 32

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Benign	0.075
BayesDel_addAF	Uncertain	0.023	T
BayesDel_noAF	Benign	-0.21
CADD	Benign	18
DANN	Benign	0.67
DEOGEN2	Benign	0.36	T;.
Eigen	Benign	-0.23
Eigen_PC	Benign	-0.025
FATHMM_MKL	Benign	0.64	D
LIST_S2	Benign	0.67	T;T
M_CAP	Benign	0.0090	T
MetaRNN	Benign	0.14	T;T
MetaSVM	Benign	-0.95	T
MutationAssessor	Benign	0.20	N;.
PrimateAI	Benign	0.42	T
PROVEAN	Benign	-0.60	N;.
REVEL	Benign	0.20
Sift	Benign	0.90	T;.
Sift4G	Benign	0.94	T;.
Polyphen		0.22	B;.
Vest4		0.24
MutPred		0.33		Gain of catalytic residue at K95 (P = 0);Gain of catalytic residue at K95 (P = 0);
MVP		0.82
MPC		0.57
ClinPred		0.71	D
GERP RS		5.4
Varity_R		0.13
gMVP		0.26

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: chr13-48916747;