19-45486076-T-C

Variant summary

Our verdict is Uncertain significance. Variant got 0 ACMG points: 2P and 2B. PM2 BP4_Moderate

The NM_005619.5(RTN2):c.1535A>G(p.Gln512Arg) variant causes a missense change. The variant allele was found at a frequency of 0.00000205 in 1,461,848 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: not found (cov: 31)
  • Exomes 𝑓: 0.0000021 (0 hom.)
• Consequence: RTN2 NM_005619.5 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 4.45

Genes affected

RTN2 (HGNC:10468): (reticulon 2) This gene belongs to the family of reticulon encoding genes. Reticulons are associated with the endoplasmic reticulum, and are involved in neuroendocrine secretion or in membrane trafficking in neuroendocrine cells. Reticulon proteins also play an important role in the replication of positive-strand RNA (ssRNA) viruses. Mutations at this locus have been associated with autosomal dominant spastic paraplegia-12. [provided by RefSeq, Aug 2020]

ACMG classification

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=0.21313399).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
RTN2	NM_005619.5	c.1535A>G	p.Gln512Arg	missense_variant	10/11	ENST00000245923.9
RTN2	NM_206900.3	c.1316A>G	p.Gln439Arg	missense_variant	9/10
RTN2	NM_206901.3	c.515A>G	p.Gln172Arg	missense_variant	6/7

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
RTN2	ENST00000245923.9	c.1535A>G	p.Gln512Arg	missense_variant	10/11	1	NM_005619.5

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD3 exomes AF: 0.00000795 AC: 2 AN: 251424 Hom.: 0 AF XY: 0.00000736 AC XY: 1 AN XY: 135892

Gnomad AFR exome AF: 0.00

Gnomad AMR exome AF: 0.0000578

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: 0.00

Gnomad OTH exome AF: 0.00

GnomAD4 exome AF: 0.00000205 AC: 3 AN: 1461848 Hom.: 0 Cov.: 31 AF XY: 0.00000138 AC XY: 1 AN XY: 727222

Gnomad4 AFR exome AF: 0.00

Gnomad4 AMR exome AF: 0.0000671

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: 0.00

Gnomad4 OTH exome AF: 0.00

GnomAD4 genome Cov.: 31

Bravo AF: 0.0000113

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Spastic paraplegia Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Invitae

Oct 09, 2019

This variant is not present in population databases (ExAC no frequency). 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. Algorithms developed to predict the effect of missense changes on protein structure and function are either unavailable or do not agree on the potential impact of this missense change (SIFT: "Tolerated"; PolyPhen-2: "Possibly Damaging"; Align-GVGD: "Class C0"). This variant has not been reported in the literature in individuals with RTN2-related conditions. This sequence change replaces glutamine with arginine at codon 512 of the RTN2 protein (p.Gln512Arg). The glutamine residue is weakly conserved and there is a small physicochemical difference between glutamine and arginine. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.54
BayesDel_addAF	Benign	-0.13	T
BayesDel_noAF	Benign	-0.24
Cadd	Pathogenic	26
Dann	Uncertain	1.0
DEOGEN2	Benign	0.21	T;.;T;.
Eigen	Uncertain	0.37
Eigen_PC	Uncertain	0.39
FATHMM_MKL	Benign	0.55	D
LIST_S2	Benign	0.77	T;T;T;T
M_CAP	Benign	0.016	T
MetaRNN	Benign	0.21	T;T;T;T
MetaSVM	Benign	-0.83	T
MutationAssessor	Benign	1.5	L;.;.;.
MutationTaster	Benign	0.53	D;D;D;D
PrimateAI	Uncertain	0.65	T
PROVEAN	Benign	-1.1	N;N;.;N
REVEL	Benign	0.24
Sift	Uncertain	0.024	D;T;.;D
Sift4G	Benign	0.093	T;T;T;T
Polyphen		0.96	D;.;.;P
Vest4		0.18
MutPred		0.45		Gain of MoRF binding (P = 0.0251);.;.;.;
MVP		0.27
MPC		0.86
ClinPred		0.76	D
GERP RS		4.8
Varity_R		0.25
gMVP		0.41

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

Other links and lift over

dbSNP: rs1272372658; hg19: chr19-45989334;