chr20-17616806-C-T

Variant names:

Variant summary

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

The NM_001365613.2(RRBP1):c.3793G>A(p.Val1265Ile) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000688 in 1,613,306 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).

Frequency

Genomes: 𝑓 0.000039 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000072 ( 0 hom. )

Consequence

RRBP1
NM_001365613.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.85

Variant links:

Genes affected

RRBP1 (HGNC:10448): (ribosome binding protein 1) This gene encodes a ribosome-binding protein of the endoplasmic reticulum (ER) membrane. Studies suggest that this gene plays a role in ER proliferation, secretory pathways and secretory cell differentiation, and mediation of ER-microtubule interactions. Alternative splicing has been observed and protein isoforms are characterized by regions of N-terminal decapeptide and C-terminal heptad repeats. Splicing of the tandem repeats results in variations in ribosome-binding affinity and secretory function. The full-length nature of variants which differ in repeat length has not been determined. Pseudogenes of this gene have been identified on chromosomes 3 and 7, and RRBP1 has been excluded as a candidate gene in the cause of Alagille syndrome, the result of a mutation in a nearby gene on chromosome 20p12. [provided by RefSeq, Apr 2012]

RRBP1 links:

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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=0.038154393).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RRBP1	NM_001365613.2 link	c.3793G>A	p.Val1265Ile	missense_variant	Exon 21 of 25	ENST00000377813.6	NP_001352542.1
RRBP1	NM_001042576.2 link	c.2494G>A	p.Val832Ile	missense_variant	Exon 22 of 26		NP_001036041.2	Q9P2E9-3
RRBP1	NM_004587.3 link	c.2494G>A	p.Val832Ile	missense_variant	Exon 21 of 25		NP_004578.3	Q9P2E9-3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RRBP1	ENST00000377813.6 link	c.3793G>A	p.Val1265Ile	missense_variant	Exon 21 of 25	1	NM_001365613.2	ENSP00000367044.1		Q9P2E9-1

Frequencies

GnomAD3 genomes

AF:

0.0000394

AC:

AN:

152204

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:

0.000622

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000759

AC:

AN:

250264

Hom.:

AF XY:

0.0000961

AC XY:

AN XY:

135294

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:

0.000590

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000883

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000719

AC:

105

AN:

1460984

Hom.:

Cov.:

AF XY:

0.0000770

AC XY:

AN XY:

726830

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:

0.000778

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000288

Gnomad4 OTH exome

AF:

0.0000994

GnomAD4 genome

AF:

0.0000394

AC:

AN:

152322

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74478

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:

0.000622

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000441

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000277

Hom.:

Bravo

AF:

0.0000227

ExAC

AF:

0.000123

AC:

Asia WGS

AF:

0.00144

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Oct 21, 2024

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.2494G>A (p.V832I) alteration is located in exon 22 (coding exon 20) of the RRBP1 gene. This alteration results from a G to A substitution at nucleotide position 2494, causing the valine (V) at amino acid position 832 to be replaced by an isoleucine (I). 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

0.11

BayesDel_addAF

Benign

-0.39

BayesDel_noAF

Benign

-0.44

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.069

.;.;T;T;.;.;T

Eigen

Uncertain

0.33

Eigen_PC

Uncertain

0.34

FATHMM_MKL

Uncertain

0.87

LIST_S2

Uncertain

0.91

D;D;D;.;D;.;D

M_CAP

Benign

0.0065

MetaRNN

Benign

0.038

T;T;T;T;T;T;T

MetaSVM

Benign

-1.0

MutationAssessor

Uncertain

2.6

.;.;M;M;.;.;.

PrimateAI

Uncertain

0.56

PROVEAN

Benign

-0.29

.;.;N;N;N;N;N

REVEL

Benign

0.13

Sift

Benign

0.11

.;.;T;T;T;T;T

Sift4G

Benign

0.46

T;T;T;T;T;T;T

Polyphen

0.98, 1.0

.;.;D;D;D;D;.

Vest4

0.39

MutPred

0.064

.;.;Gain of catalytic residue at V1265 (P = 0.2283);Gain of catalytic residue at V1265 (P = 0.2283);.;.;.;

MVP

0.35

MPC

0.14

ClinPred

0.26

GERP RS

4.5

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.048

gMVP

0.11

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