19-38534781-C-T

Variant names:

Variant summary

Our verdict is Likely benign. Variant got -2 ACMG points: 1P and 3B. PP2BP4_ModerateBS1_Supporting

The NM_000540.3(RYR1):c.11321C>T(p.Ala3774Val) variant causes a missense change involving the alteration of a conserved nucleotide. The variant allele was found at a frequency of 0.000104 in 1,613,770 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: 𝑓 0.00053 ( 0 hom., cov: 31)

Exomes 𝑓: 0.000060 ( 0 hom. )

Consequence

RYR1
NM_000540.3 missense

Scores

Clinical Significance

Uncertain significance criteria provided, multiple submitters, no conflicts U:8

Conservation

PhyloP100: 7.90

Variant links:

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]

RYR1 links:

Genome browser will be placed here

ACMG classification

Classification made for transcript

Verdict is Likely_benign. Variant got -2 ACMG points.

PP2

Missense variant in the RYR1 gene, where missense mutations are typically associated with disease (based on misZ statistic). The gene has 212 curated pathogenic missense variants (we use a threshold of 10). The gene has 94 curated benign missense variants. Gene score misZ: 1.918 (below the threshold of 3.09). Trascript score misZ: 3.9788 (above the threshold of 3.09). GenCC associations: The gene is linked to 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.

BP4

Computational evidence support a benign effect (MetaRNN=0.20265386).

BS1

Variant frequency is greater than expected in population afr. gnomad4 allele frequency = 0.000525 (80/152274) while in subpopulation AFR AF= 0.00164 (68/41554). AF 95% confidence interval is 0.00132. There are 0 homozygotes in gnomad4. There are 44 alleles in male gnomad4 subpopulation. Median coverage is 31. This position pass quality control queck. Existence of Clinvar submissions makes me limit the strength of this signal to Supporting

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RYR1	NM_000540.3 link	c.11321C>T	p.Ala3774Val	missense_variant	Exon 79 of 106	ENST00000359596.8	NP_000531.2	P21817-1

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RYR1	ENST00000359596.8 link	c.11321C>T	p.Ala3774Val	missense_variant	Exon 79 of 106	5	NM_000540.3	ENSP00000352608.2		P21817-1

Frequencies

GnomAD3 genomes

AF:

0.000532

AC:

AN:

152156

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00164

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000720

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.000479

GnomAD3 exomes

AF:

0.000124

AC:

AN:

250028

Hom.:

AF XY:

0.000126

AC XY:

AN XY:

135266

show subpopulations

Gnomad AFR exome

AF:

0.00131

Gnomad AMR exome

AF:

0.000174

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad SAS exome

AF:

0.0000657

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000177

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

AF:

0.0000602

AC:

AN:

1461496

Hom.:

Cov.:

AF XY:

0.0000646

AC XY:

AN XY:

727000

show subpopulations

Gnomad4 AFR exome

AF:

0.00149

Gnomad4 AMR exome

AF:

0.000134

Gnomad4 ASJ exome

AF:

0.00

Gnomad4 EAS exome

AF:

0.00

Gnomad4 SAS exome

AF:

0.000105

Gnomad4 FIN exome

AF:

0.00

Gnomad4 NFE exome

AF:

0.00000450

Gnomad4 OTH exome

AF:

0.000265

GnomAD4 genome

AF:

0.000525

AC:

AN:

152274

Hom.:

Cov.:

AF XY:

0.000591

AC XY:

AN XY:

74450

show subpopulations

Gnomad4 AFR

AF:

0.00164

Gnomad4 AMR

AF:

0.000719

Gnomad4 ASJ

AF:

0.00

Gnomad4 EAS

AF:

0.00

Gnomad4 SAS

AF:

0.00

Gnomad4 FIN

AF:

0.00

Gnomad4 NFE

AF:

0.00

Gnomad4 OTH

AF:

0.000474

Alfa

AF:

0.0000931

Hom.:

Bravo

AF:

0.000616

ESP6500AA

AF:

0.00113

AC:

ESP6500EA

AF:

0.00

AC:

ExAC

AF:

0.000140

AC:

Asia WGS

AF:

0.000289

AC:

AN:

3478

EpiCase

AF:

0.00

EpiControl

AF:

0.0000593

ClinVar

Significance: Uncertain significance

Submissions summary: Uncertain:8

Revision: criteria provided, multiple submitters, no conflicts

LINK: link

Submissions by phenotype

not provided

Uncertain:5

Apr 12, 2023

Athena Diagnostics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

Available data are insufficient to determine the clinical significance of the variant at this time. The frequency of this variant in the general population is higher than would generally be expected for pathogenic variants in this gene (http://gnomad.broadinstitute.org). Computational tools predict that this variant is damaging. -

Dec 01, 2022

GeneDx

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

In silico analysis supports that this missense variant has a deleterious effect on protein structure/function; Reported in a patient with central core disease who also harbored a second pathogenic RYR1 variant, phase unknown (Galleni et al., 2020).; This variant is associated with the following publications: (PMID: 33458582) -

Mar 21, 2024

Mayo Clinic Laboratories, Mayo Clinic

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

BP2 -

Mar 24, 2017

PreventionGenetics, part of Exact Sciences

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Aug 14, 2023

Revvity Omics, Revvity

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

RYR1-related disorder

Uncertain:1

Jan 20, 2025

Labcorp Genetics (formerly Invitae), Labcorp

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

This sequence change replaces alanine, which is neutral and non-polar, with valine, which is neutral and non-polar, at codon 3774 of the RYR1 protein (p.Ala3774Val). This variant is present in population databases (rs146361173, gnomAD 0.1%). This missense change has been observed in individual(s) with RYR1-related conditions (PMID: 33458582). ClinVar contains an entry for this variant (Variation ID: 252488). Invitae Evidence Modeling of protein sequence and biophysical properties (such as structural, functional, and spatial information, amino acid conservation, physicochemical variation, residue mobility, and thermodynamic stability) indicates that this missense variant is not expected to disrupt RYR1 protein function with a negative predictive value of 80%. 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 myopathy with fiber type disproportion;C1840365:King Denborough syndrome;C1850674:Congenital multicore myopathy with external ophthalmoplegia;C2930980:Malignant hyperthermia, susceptibility to, 1;C5830701:Central core myopathy

Uncertain:1

Aug 03, 2021

Fulgent Genetics, Fulgent Genetics

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Malignant hypothermia

Uncertain:1

Sep 24, 2015

Genomic Diagnostic Laboratory, Division of Genomic Diagnostics, Children's Hospital of Philadelphia

Significance: Uncertain significance

Review Status: criteria provided, single submitter

Collection Method: clinical testing

- -

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Pathogenic

0.73

BayesDel_addAF

Benign

-0.096

BayesDel_noAF

Uncertain

0.060

CADD

Uncertain

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.66

.;D;.;.

Eigen

Uncertain

0.61

Eigen_PC

Uncertain

0.58

FATHMM_MKL

Pathogenic

0.97

LIST_S2

Pathogenic

0.97

D;D;D;D

M_CAP

Pathogenic

0.32

MetaRNN

Benign

0.20

T;T;T;T

MetaSVM

Uncertain

0.70

MutationAssessor

Benign

1.3

.;L;.;.

PrimateAI

Uncertain

0.66

PROVEAN

Uncertain

-2.9

D;D;.;.

REVEL

Uncertain

0.61

Sift

Benign

0.43

T;T;.;.

Sift4G

Pathogenic

0.0

.;.;D;D

Polyphen

1.0

D;D;.;.

Vest4

0.71

MVP

1.0

MPC

1.0

ClinPred

0.096

GERP RS

4.8

Varity_R

0.18

gMVP

0.34

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

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