chr15-33696482-A-T

Position:

• chr15-33696482-A-T

Variant summary

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

The NM_001036.6(RYR3):​c.6125A>T​(p.Asn2042Ile) variant causes a missense change. The variant allele was found at a frequency of 0.00000479 in 1,461,666 control chromosomes in the GnomAD database, with no homozygous occurrence. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency:
  • Genomes: not found (cov: 31)
  • Exomes 𝑓: 0.0000048 (0 hom.)
• Consequence: RYR3 NM_001036.6 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 5.37

Genes affected

RYR3 (HGNC:10485): (ryanodine receptor 3) The protein encoded by this gene is a ryanodine receptor, which functions to release calcium from intracellular storage for use in many cellular processes. For example, the encoded protein is involved in skeletal muscle contraction by releasing calcium from the sarcoplasmic reticulum followed by depolarization of T-tubules. Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, Sep 2011]

RYR3 (HGNC:):

ACMG classification

Verdict is Uncertain_significance. Variant got 2 ACMG points.

• PM2: Very rare variant in population databases, with high coverage

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RYR3	NM_001036.6	c.6125A>T	p.Asn2042Ile	missense_variant	39/104	ENST00000634891.2	NP_001027.3

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RYR3	ENST00000634891.2	c.6125A>T	p.Asn2042Ile	missense_variant	39/104	1	NM_001036.6	ENSP00000489262.1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome AF: 0.00000479 AC: 7 AN: 1461666 Hom.: 0 Cov.: 32 AF XY: 0.00000275 AC XY: 2 AN XY: 727108

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: 0.00

Gnomad4 FIN exome AF: 0.00

Gnomad4 NFE exome AF: 0.00000540

Gnomad4 OTH exome AF: 0.0000166

GnomAD4 genome Cov.: 31

Bravo AF: 0.00000378

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

Epileptic encephalopathy Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Sep 10, 2020

This sequence change replaces asparagine with isoleucine at codon 2042 of the RYR3 protein (p.Asn2042Ile). The asparagine residue is highly conserved and there is a large physicochemical difference between asparagine and isoleucine. This variant is not present in population databases (ExAC no frequency). This variant has not been reported in the literature in individuals with RYR3-related conditions. 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: "Deleterious"; PolyPhen-2: "Benign"; Align-GVGD: "Class C55"). 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. -

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.35
BayesDel_addAF	Benign	-0.037	T
BayesDel_noAF	Benign	-0.29
CADD	Uncertain	23
DANN	Uncertain	0.99
DEOGEN2	Pathogenic	0.84	D;.;.;.;.
Eigen	Uncertain	0.24
Eigen_PC	Uncertain	0.33
FATHMM_MKL	Uncertain	0.96	D
LIST_S2	Uncertain	0.96	D;D;D;D;D
M_CAP	Benign	0.035	D
MetaRNN	Uncertain	0.63	D;D;D;D;D
MetaSVM	Benign	-0.41	T
MutationAssessor	Benign	1.2	L;L;.;.;.
PrimateAI	Uncertain	0.56	T
PROVEAN	Uncertain	-4.3	.;D;D;.;.
REVEL	Benign	0.25
Sift	Uncertain	0.0070	.;D;D;.;.
Polyphen		0.86	P;B;.;.;.
Vest4		0.71
MutPred		0.47		Loss of disorder (P = 0.1236);Loss of disorder (P = 0.1236);Loss of disorder (P = 0.1236);Loss of disorder (P = 0.1236);Loss of disorder (P = 0.1236);
MVP		0.48
MPC		0.41
ClinPred		0.99	D
GERP RS		4.8
Varity_R		0.57
gMVP		0.56

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

Other links and lift over

dbSNP: rs116926961; hg19: chr15-33988683;