Genetic Variant RABEP2:p.Arg388Trp (chr16-28908692-G-A) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_024816.3(RABEP2):c.1162C>T(p.Arg388Trp) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000235 in 1,614,066 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R388Q) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000020 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000024 ( 0 hom. )

Consequence

RABEP2
NM_024816.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, single submitter U:1

Conservation

PhyloP100: 3.31

Variant links:

Genes affected

RABEP2 (HGNC:24817): (rabaptin, RAB GTPase binding effector protein 2) Predicted to enable GTPase activator activity and growth factor activity. Involved in regulation of cilium assembly. Located in cytosol; intracellular membrane-bounded organelle; and microtubule organizing center. [provided by Alliance of Genome Resources, Apr 2022]

RABEP2 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Uncertain_significance. Variant got 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.852

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RABEP2	NM_024816.3 link	c.1162C>T	p.Arg388Trp	missense_variant	Exon 8 of 13	ENST00000358201.9	NP_079092.2	Q9H5N1-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	UniProt
RABEP2	ENST00000358201.9 link	c.1162C>T	p.Arg388Trp	missense_variant	Exon 8 of 13	1	NM_024816.3	ENSP00000350934.4	Q9H5N1-1
RABEP2	ENST00000357573.10 link	c.1066C>T	p.Arg356Trp	missense_variant	Exon 7 of 11	1		ENSP00000350186.6	Q9H5N1-2
RABEP2	ENST00000544477.5 link	c.949C>T	p.Arg317Trp	missense_variant	Exon 7 of 12	2		ENSP00000442798.1	B4DHR0

Frequencies

GnomAD3 genomes

AF:

0.0000197

AC:

AN:

152208

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0000482

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

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:

0.0000147

Gnomad OTH

AF:

0.00

GnomAD4 exome

AF:

0.0000239

AC:

AN:

1461858

Hom.:

Cov.:

AF XY:

0.0000138

AC XY:

AN XY:

727228

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:

0.0000580

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000270

Gnomad4 OTH exome

AF:

0.00

GnomAD4 genome

AF:

0.0000197

AC:

AN:

152208

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74358

show subpopulations

Gnomad4 AFR

AF:

0.0000482

Gnomad4 AMR

AF:

0.00

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.0000147

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000712

Hom.:

Bravo

AF:

0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

LINK: link

Submissions by phenotype

not specified

Uncertain:1

Apr 25, 2023

Ambry Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

The c.1162C>T (p.R388W) alteration is located in exon 8 (coding exon 8) of the RABEP2 gene. This alteration results from a C to T substitution at nucleotide position 1162, causing the arginine (R) at amino acid position 388 to be replaced by a tryptophan (W). 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

0.18

BayesDel_addAF

Uncertain

0.095

BayesDel_noAF

Benign

-0.10

CADD

Pathogenic

DANN

Pathogenic

1.0

DEOGEN2

Benign

0.25

.;T;.

Eigen

Uncertain

0.62

Eigen_PC

Uncertain

0.58

FATHMM_MKL

Uncertain

0.89

LIST_S2

Uncertain

0.95

D;D;D

M_CAP

Benign

0.046

MetaRNN

Pathogenic

0.85

D;D;D

MetaSVM

Benign

-0.54

MutationAssessor

Uncertain

2.3

.;M;.

PrimateAI

Uncertain

0.49

PROVEAN

Uncertain

-3.4

D;D;D

REVEL

Uncertain

0.30

Sift

Uncertain

0.0030

D;D;D

Sift4G

Uncertain

0.0080

D;D;D

Polyphen

1.0

D;D;D

Vest4

0.79

MutPred

0.63

.;Gain of glycosylation at P393 (P = 0.0714);.;

MVP

0.77

MPC

0.56

ClinPred

0.99

GERP RS

4.8

Varity_R

0.12

gMVP

0.31

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.15

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