chr11-47438889-G-C

Variant names:

• chr11-47438889-G-C
• rs549232026
• NM_005055.5:c.1009C>G

Variant summary

Our verdict is Uncertain significance. The variant received 3 ACMG points: 3P and 0B. PM2 PP3

The NM_005055.5(RAPSN):​c.1009C>G​(p.Arg337Gly) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.00000142 in 1,412,524 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 (no stars). Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R337H) has been classified as Uncertain significance.

• Frequency:
  • Genomes: not found (cov: 33)
  • Exomes 𝑓: 0.0000014 (0 hom.)
• Consequence: RAPSN NM_005055.5 missense
• Clinical Significance: Uncertain significance no assertion criteria provided U:1
• Conservation: PhyloP100: 9.53
• Publications: 0 publications found

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 Gene-Disease associations (from GenCC):

• fetal akinesia deformation sequence 2

  Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
• neuromuscular disease

  Inheritance: AR Classification: DEFINITIVE Submitted by: Ambry Genetics
• congenital myasthenic syndrome 11

  Inheritance: AR Classification: STRONG Submitted by: Labcorp Genetics (formerly Invitae), PanelApp Australia, Genomics England PanelApp
• fetal akinesia deformation sequence 1

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
• postsynaptic congenital myasthenic syndrome

  Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

LOC124902673 (HGNC:):

ACMG classification

Our verdict: Uncertain_significance. The variant received 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.79

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_005055.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RAPSN	NM_005055.5	MANE Select	c.1009C>G	p.Arg337Gly	missense	Exon 7 of 8	NP_005046.2
	RAPSN	NM_001440490.1		c.1145C>G	p.Pro382Arg	missense	Exon 7 of 8	NP_001427419.1
	RAPSN	NM_001440491.1		c.1094C>G	p.Pro365Arg	missense	Exon 7 of 8	NP_001427420.1

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	RAPSN	ENST00000298854.7	TSL:1 MANE Select	c.1009C>G	p.Arg337Gly	missense	Exon 7 of 8	ENSP00000298854.2
	RAPSN	ENST00000352508.7	TSL:1	c.832C>G	p.Arg278Gly	missense	Exon 5 of 6	ENSP00000298853.3
	RAPSN	ENST00000529341.1	TSL:1	c.832C>G	p.Arg278Gly	missense	Exon 5 of 5	ENSP00000431732.1

Frequencies

GnomAD3 genomes Cov.: 33

GnomAD4 exome AF: 0.00000142 AC: 2 AN: 1412524 Hom.: 0 Cov.: 34 AF XY: 0.00 AC XY: 0 AN XY: 697882

African (AFR) AF: 0.00 AC: 0 AN: 32568

American (AMR) AF: 0.00 AC: 0 AN: 37024

Ashkenazi Jewish (ASJ) AF: 0.00 AC: 0 AN: 25244

East Asian (EAS) AF: 0.00 AC: 0 AN: 37378

South Asian (SAS) AF: 0.00 AC: 0 AN: 80198

European-Finnish (FIN) AF: 0.00 AC: 0 AN: 49784

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 5694

European-Non Finnish (NFE) AF: 0.00000184 AC: 2 AN: 1086142

Other (OTH) AF: 0.00 AC: 0 AN: 58492

GnomAD4 genome Cov.: 33

ClinVar

ClinVar submissions as Germline

Significance: Uncertain significance

Revision: no assertion criteria provided

Pathogenic	VUS	Benign	Condition
-	1	-	Congenital myasthenic syndrome (1)

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.71
BayesDel_addAF	Pathogenic	0.31	D
BayesDel_noAF	Pathogenic	0.20
CADD	Uncertain	26
DANN	Uncertain	1.0
DEOGEN2	Benign	0.16	T
Eigen	Uncertain	0.46
Eigen_PC	Uncertain	0.58
FATHMM_MKL	Pathogenic	0.98	D
LIST_S2	Uncertain	0.95	D
M_CAP	Uncertain	0.23	D
MetaRNN	Pathogenic	0.79	D
MetaSVM	Uncertain	0.49	D
MutationAssessor	Benign	1.5	L
PhyloP100		9.5
PrimateAI	Uncertain	0.55	T
PROVEAN	Benign	-2.2	N
REVEL	Uncertain	0.49
Sift	Benign	0.30	T
Sift4G	Uncertain	0.021	D
Polyphen		0.14	B
Vest4		0.94
MutPred		0.46		Loss of MoRF binding (P = 0.0162)
MVP		0.96
MPC		0.28
ClinPred		0.78	D
GERP RS		5.9
Varity_R		0.23
gMVP		0.75
Mutation Taster		=46/54	disease causing

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

Other links and lift over

dbSNP: rs549232026; hg19: chr11-47460440;