chr19-38517445-G-C

Position:

• chr19-38517445-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 3 ACMG points: 3P and 0B. PM2 PP2

The NM_000540.3(RYR1):​c.9772G>C​(p.Glu3258Gln) variant causes a missense change involving the alteration of a conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. Variant has been reported in ClinVar as Uncertain significance (★).

• Frequency: Genomes: not found (cov: 31)
• Consequence: RYR1 NM_000540.3 missense
• Clinical Significance: Uncertain significance criteria provided, single submitter U:1
• Conservation: PhyloP100: 9.94

Genes affected

RYR1 (HGNC:10483): (ryanodine receptor 1) This gene encodes a ryanodine receptor found in skeletal muscle. The encoded protein functions as a calcium release channel in the sarcoplasmic reticulum but also serves to connect the sarcoplasmic reticulum and transverse tubule. Mutations in this gene are associated with malignant hyperthermia susceptibility, central core disease, and minicore myopathy with external ophthalmoplegia. Alternatively spliced transcripts encoding different isoforms have been described. [provided by RefSeq, Jul 2008]

ACMG classification

Verdict is Uncertain_significance. Variant got 3 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP2: Missense variant in gene, where missense usually causes diseases (based on misZ statistic), RYR1. . Gene score misZ 1.918 (greater than the threshold 3.09). Trascript score misZ 3.9788 (greater than threshold 3.09). GenCC has associacion of gene with King-Denborough syndrome, congenital multicore myopathy with external ophthalmoplegia, autosomal recessive centronuclear myopathy, RYR1-related myopathy, lethal multiple pterygium syndrome, malignant hyperthermia of anesthesia, benign Samaritan congenital myopathy, malignant hyperthermia, susceptibility to, 1, congenital myopathy with myasthenic-like onset, central core myopathy.

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RYR1	NM_000540.3	c.9772G>C	p.Glu3258Gln	missense_variant	66/106	ENST00000359596.8	NP_000531.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RYR1	ENST00000359596.8	c.9772G>C	p.Glu3258Gln	missense_variant	66/106	5	NM_000540.3	ENSP00000352608	A2
RYR1	ENST00000355481.8	c.9772G>C	p.Glu3258Gln	missense_variant	66/105	1		ENSP00000347667	P4
RYR1	ENST00000594335.5	c.*515G>C		3_prime_UTR_variant, NMD_transcript_variant	26/49	1		ENSP00000470927
RYR1	ENST00000599547.6	c.*531G>C		3_prime_UTR_variant, NMD_transcript_variant	65/80	2		ENSP00000471601

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 34

GnomAD4 genome Cov.: 31

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:1

Revision: criteria provided, single submitter

Submissions by phenotype

RYR1-related disorder Uncertain:1

Uncertain significance, criteria provided, single submitter

clinical testing

Labcorp Genetics (formerly Invitae), Labcorp

Mar 09, 2022

Advanced modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) performed at Invitae indicates that this missense variant is not expected to disrupt RYR1 protein function. ClinVar contains an entry for this variant (Variation ID: 856820). This variant has not been reported in the literature in individuals affected with RYR1-related conditions. This variant is not present in population databases (gnomAD no frequency). This sequence change replaces glutamic acid, which is acidic and polar, with glutamine, which is neutral and polar, at codon 3258 of the RYR1 protein (p.Glu3258Gln). 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	Benign	0.16
BayesDel_addAF	Uncertain	0.053	T
BayesDel_noAF	Benign	-0.16
CADD	Benign	22
DANN	Benign	0.78
DEOGEN2	Uncertain	0.68	.;D
Eigen	Uncertain	0.39
Eigen_PC	Uncertain	0.28
FATHMM_MKL	Pathogenic	0.99	D
LIST_S2	Uncertain	0.95	D;D
M_CAP	Uncertain	0.17	D
MetaRNN	Uncertain	0.51	D;D
MetaSVM	Uncertain	0.59	D
MutationAssessor	Uncertain	2.8	M;M
MutationTaster	Benign	0.98	D;D;D
PrimateAI	Uncertain	0.59	T
PROVEAN	Benign	-2.3	N;N
REVEL	Uncertain	0.45
Sift	Benign	0.078	T;T
Polyphen		0.99	D;D
Vest4		0.46
MutPred		0.21		Loss of disorder (P = 0.1225);Loss of disorder (P = 0.1225);
MVP		1.0
MPC		0.34
ClinPred		0.92	D
GERP RS		2.9
Varity_R		0.25
gMVP		0.57

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.040		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: rs754431075; hg19: chr19-39008085;