chr20-17615946-G-A

Position:

chr20-17615946-G-A

Variant summary

Our verdict is Uncertain significance. Variant got 1 ACMG points: 2P and 1B. PM2BP4

The NM_001365613.2(RRBP1):c.3931C>T(p.Leu1311Phe) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000193 in 1,610,028 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 0.000046 ( 0 hom., cov: 34)

Exomes 𝑓: 0.000016 ( 0 hom. )

Consequence

RRBP1
NM_001365613.2 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 2.19

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:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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 (MetaRNN=0.3593151).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein
RRBP1	NM_001365613.2 linkuse as main transcript	c.3931C>T	p.Leu1311Phe	missense_variant	22/25	ENST00000377813.6	NP_001352542.1
RRBP1	NM_001042576.2 linkuse as main transcript	c.2632C>T	p.Leu878Phe	missense_variant	23/26		NP_001036041.2
RRBP1	NM_004587.3 linkuse as main transcript	c.2632C>T	p.Leu878Phe	missense_variant	22/25		NP_004578.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RRBP1	ENST00000377813.6 linkuse as main transcript	c.3931C>T	p.Leu1311Phe	missense_variant	22/25	1	NM_001365613.2	ENSP00000367044	A2	Q9P2E9-1

Frequencies

GnomAD3 genomes

AF:

0.0000460

AC:

AN:

152240

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000241

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000392

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000282

AC:

AN:

248386

Hom.:

AF XY:

0.0000223

AC XY:

AN XY:

134636

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.000116

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000265

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000165

AC:

AN:

1457788

Hom.:

Cov.:

AF XY:

0.0000179

AC XY:

AN XY:

725376

show subpopulations

Gnomad4 AFR exome

AF:

0.00

Gnomad4 AMR exome

AF:

0.000134

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:

0.0000135

Gnomad4 OTH exome

AF:

0.0000497

GnomAD4 genome

AF:

0.0000460

AC:

AN:

152240

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74376

show subpopulations

Gnomad4 AFR

AF:

0.0000241

Gnomad4 AMR

AF:

0.000392

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.0000491

ESP6500AA

AF:

0.00

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.0000412

AC:

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

Dec 08, 2023

The c.2632C>T (p.L878F) alteration is located in exon 23 (coding exon 21) of the RRBP1 gene. This alteration results from a C to T substitution at nucleotide position 2632, causing the leucine (L) at amino acid position 878 to be replaced by a phenylalanine (F). 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

0.28

BayesDel_addAF

Benign

-0.21

BayesDel_noAF

Benign

-0.31

CADD

Uncertain

DANN

Uncertain

1.0

DEOGEN2

Benign

0.30

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

Eigen

Uncertain

0.61

Eigen_PC

Uncertain

0.58

FATHMM_MKL

Uncertain

0.87

LIST_S2

Uncertain

0.92

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

M_CAP

Benign

0.019

MetaRNN

Benign

0.36

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

MetaSVM

Benign

-0.86

MutationAssessor

Uncertain

2.7

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

MutationTaster

Benign

1.0

D;D;D;D;D

PrimateAI

Benign

0.46

PROVEAN

Benign

-2.0

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

REVEL

Benign

0.14

Sift

Uncertain

0.0040

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

Sift4G

Uncertain

0.021

D;D;T;T;D;D;T

Polyphen

1.0

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

Vest4

0.51

MVP

0.52

MPC

0.41

ClinPred

0.43

GERP RS

5.4

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.099

gMVP

0.16

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