13-48496226-C-T

Position:

chr13-48496226-C-T

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 2P and 4B. PM2BP4_Strong

The NM_001268.4(RCBTB2):c.1480G>A(p.Ala494Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000695 in 1,583,816 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. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.00011 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000065 ( 0 hom. )

Consequence

RCBTB2
NM_001268.4 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 1.76

Variant links:

Genes affected

RCBTB2 (HGNC:1914): (RCC1 and BTB domain containing protein 2) This gene encodes a protein containing two C-terminal BTB/POZ domains that is related to regulator of chromosome condensation (RCC). The encoded protein may act as a guanine nucleotide exchange factor. This gene is observed to be lost or underexpressed in prostate cancers. There is a pseudogene of this gene on chromosome 10. Alternative splicing results in multiple transcript variants. [provided by RefSeq, Nov 2013]

RCBTB2 links:

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:

RCBTB2 (HGNC:):

RCBTB2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.02843362).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RCBTB2	NM_001268.4 linkuse as main transcript	c.1480G>A	p.Ala494Thr	missense_variant	14/15	ENST00000344532.8	NP_001259.1	O95199-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RCBTB2	ENST00000344532.8 linkuse as main transcript	c.1480G>A	p.Ala494Thr	missense_variant	14/15	1	NM_001268.4	ENSP00000345144.3		O95199-1

Frequencies

GnomAD3 genomes

AF:

0.000112

AC:

AN:

152136

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.000121

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.000289

Gnomad EAS

AF:

0.00173

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000294

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.000141

AC:

AN:

234116

Hom.:

AF XY:

0.000110

AC XY:

AN XY:

127306

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00157

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000554

Gnomad OTH exome

AF:

0.000180

GnomAD4 exome

AF:

0.0000650

AC:

AN:

1431562

Hom.:

Cov.:

AF XY:

0.0000534

AC XY:

AN XY:

711590

show subpopulations

Gnomad4 AFR exome

AF:

0.0000311

Gnomad4 AMR exome

AF:

0.00

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.000788

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000420

Gnomad4 OTH exome

AF:

0.000272

GnomAD4 genome

AF:

0.000112

AC:

AN:

152254

Hom.:

Cov.:

AF XY:

0.0000806

AC XY:

AN XY:

74436

show subpopulations

Gnomad4 AFR

AF:

0.000120

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.000289

Gnomad4 EAS

AF:

0.00173

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000294

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000434

Hom.:

Bravo

AF:

0.000132

ExAC

AF:

0.000140

AC:

Asia WGS

AF:

0.00115

AC:

AN:

3478

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

Jan 03, 2024

The c.1480G>A (p.A494T) alteration is located in exon 14 (coding exon 11) of the RCBTB2 gene. This alteration results from a G to A substitution at nucleotide position 1480, causing the alanine (A) at amino acid position 494 to be replaced by a threonine (T). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.097

BayesDel_addAF

Benign

-0.40

BayesDel_noAF

Benign

-0.35

CADD

Benign

DANN

Benign

0.97

DEOGEN2

Benign

0.026

T;T;.;.

Eigen

Benign

-0.59

Eigen_PC

Benign

-0.34

FATHMM_MKL

Uncertain

0.78

LIST_S2

Uncertain

0.92

D;D;D;D

M_CAP

Benign

0.041

MetaRNN

Benign

0.028

T;T;T;T

MetaSVM

Benign

-0.99

MutationAssessor

Benign

-0.67

N;.;.;.

PrimateAI

Uncertain

0.68

PROVEAN

Benign

-0.26

N;N;N;.

REVEL

Benign

0.087

Sift

Benign

0.39

T;T;T;.

Sift4G

Benign

0.43

T;T;T;T

Polyphen

0.0010

B;B;B;.

Vest4

0.11

MutPred

0.44

.;.;Gain of helix (P = 0.1736);.;

MVP

0.79

MPC

0.11

ClinPred

0.049

GERP RS

4.2

Varity_R

0.11

gMVP

0.18

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