11-47438031-C-T

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_005055.5(RAPSN):c.1183G>A(p.Gly395Arg) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.0000413 in 1,549,798 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 13/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★★). Another nucleotide change resulting in same amino acid change has been previously reported as Uncertain significancein ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. G395W) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.000059 ( 0 hom., cov: 32)

Exomes 𝑓: 0.000039 ( 0 hom. )

Consequence

RAPSN
NM_005055.5 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:3

Conservation

PhyloP100: 1.92

Variant links:

Genes affected

RAPSN (HGNC:9863): (receptor associated protein of the synapse) This gene encodes a member of a family of proteins that are receptor associated proteins of the synapse. The encoded protein contains a conserved cAMP-dependent protein kinase phosphorylation site, and plays a critical role in clustering and anchoring nicotinic acetylcholine receptors at synaptic sites by linking the receptors to the underlying postsynaptic cytoskeleton, possibly by direct association with actin or spectrin. Mutations in this gene may play a role in postsynaptic congenital myasthenic syndromes. Alternatively spliced transcript variants encoding multiple isoforms have been observed for this gene. [provided by RefSeq, Apr 2011]

RAPSN links:

LOC124902673 (HGNC:):

LOC124902673 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

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=0.13153675).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RAPSN	NM_005055.5 linkuse as main transcript	c.1183G>A	p.Gly395Arg	missense_variant	8/8	ENST00000298854.7
LOC124902673	XR_007062669.1 linkuse as main transcript	n.144+264C>T		intron_variant, non_coding_transcript_variant

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RAPSN	ENST00000298854.7 linkuse as main transcript	c.1183G>A	p.Gly395Arg	missense_variant	8/8	1	NM_005055.5	P1	Q13702-1
RAPSN	ENST00000352508.7 linkuse as main transcript	c.1006G>A	p.Gly336Arg	missense_variant	6/6	1			Q13702-2
RAPSN	ENST00000524487.5 linkuse as main transcript	c.1024G>A	p.Gly342Arg	missense_variant	7/7	5
RAPSN	ENST00000528356.1 linkuse as main transcript	n.138G>A		non_coding_transcript_exon_variant	2/2	3

Frequencies

GnomAD3 genomes

AF:

0.0000591

AC:

AN:

152170

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.0000655

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:

0.000118

Gnomad OTH

AF:

0.00

GnomAD3 exomes

AF:

0.0000257

AC:

AN:

155932

Hom.:

AF XY:

0.0000365

AC XY:

AN XY:

82086

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000404

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:

0.0000500

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000394

AC:

AN:

1397628

Hom.:

Cov.:

AF XY:

0.0000493

AC XY:

AN XY:

689328

show subpopulations

Gnomad4 AFR exome

AF:

0.0000317

Gnomad4 AMR exome

AF:

0.0000280

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.0000280

Gnomad4 SAS exome

AF:

0.00

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.0000473

Gnomad4 OTH exome

AF:

0.0000173

GnomAD4 genome

AF:

0.0000591

AC:

AN:

152170

Hom.:

Cov.:

AF XY:

0.0000269

AC XY:

AN XY:

74324

show subpopulations

Gnomad4 AFR

AF:

0.00

Gnomad4 AMR

AF:

0.0000655

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.000118

Gnomad4 OTH

AF:

0.00

Alfa

AF:

0.0000823

Hom.:

Bravo

AF:

0.0000491

ExAC

AF:

0.0000195

AC:

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:3

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

Inborn genetic diseases

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Ambry Genetics

May 04, 2022

The c.1183G>A (p.G395R) alteration is located in exon 8 (coding exon 8) of the RAPSN gene. This alteration results from a G to A substitution at nucleotide position 1183, causing the glycine (G) at amino acid position 395 to be replaced by an arginine (R). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. -

Fetal akinesia deformation sequence 1;C4225367:Congenital myasthenic syndrome 11

Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Nov 19, 2021

This sequence change replaces glycine, which is neutral and non-polar, with arginine, which is basic and polar, at codon 395 of the RAPSN protein (p.Gly395Arg). This variant is present in population databases (rs768882267, gnomAD 0.008%). This variant has not been reported in the literature in individuals affected with RAPSN-related conditions. ClinVar contains an entry for this variant (Variation ID: 969203). Algorithms developed to predict the effect of missense changes on protein structure and function output the following: SIFT: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C0". The arginine amino acid residue is found in multiple mammalian species, which suggests that this missense change does not adversely affect protein function. In summary, the available evidence is currently insufficient to determine the role of this variant in disease. Therefore, it has been classified as a Variant of Uncertain Significance. -

Congenital myasthenic syndrome

Uncertain:1

Uncertain significance, no assertion criteria provided

clinical testing

Natera, Inc.

Mar 25, 2020

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.12

BayesDel_addAF

Benign

-0.019

BayesDel_noAF

Benign

-0.11

Cadd

Benign

Dann

Uncertain

0.99

DEOGEN2

Benign

0.077

T;.;.

Eigen

Benign

-0.14

Eigen_PC

Benign

-0.015

FATHMM_MKL

Uncertain

0.87

LIST_S2

Benign

0.82

T;T;T

M_CAP

Benign

0.063

MetaRNN

Benign

0.13

T;T;T

MetaSVM

Uncertain

-0.061

MutationAssessor

Benign

-0.18

N;.;.

MutationTaster

Benign

1.0

D;D;N

PrimateAI

Uncertain

0.49

PROVEAN

Benign

-0.59

N;N;.

REVEL

Benign

0.16

Sift

Benign

0.23

T;D;.

Sift4G

Uncertain

0.024

D;D;D

Polyphen

0.93

P;B;.

Vest4

0.25

MutPred

0.34

Gain of helix (P = 0.0225);.;.;

MVP

0.63

MPC

0.19

ClinPred

0.14

GERP RS

4.4

Varity_R

0.17

gMVP

0.52

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

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