Genetic Variant RYR1:p.Arg975Pro (chr19-38466144-G-C) – ACMG Classification: Uncertain_significance (4 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 4 ACMG points: 4P and 0B. PM2PP3_Moderate

The NM_000540.3(RYR1):c.2924G>C(p.Arg975Pro) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,004 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Another variant affecting the same amino acid position, but resulting in a different missense (i.e. R975Q) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

RYR1
NM_000540.3 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 4.43

Publications

0 publications found

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 Gene-Disease associations (from GenCC):

malignant hyperthermia, susceptibility to, 1
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: Labcorp Genetics (formerly Invitae), ClinGen, Genomics England PanelApp, Ambry Genetics
congenital multicore myopathy with external ophthalmoplegia
Inheritance: AR Classification: DEFINITIVE, STRONG Submitted by: G2P, Genomics England PanelApp
RYR1-related myopathy
Inheritance: AR, AD Classification: DEFINITIVE Submitted by: ClinGen
central core myopathy
Inheritance: AD, AR Classification: STRONG, SUPPORTIVE Submitted by: Labcorp Genetics (formerly Invitae), Orphanet, Genomics England PanelApp
King-Denborough syndrome
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
malignant hyperthermia of anesthesia
Inheritance: AD Classification: SUPPORTIVE Submitted by: Orphanet
autosomal recessive centronuclear myopathy
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
benign Samaritan congenital myopathy
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
congenital myopathy with myasthenic-like onset
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet
lethal multiple pterygium syndrome
Inheritance: AR Classification: SUPPORTIVE Submitted by: Orphanet

RYR1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 4 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

PP3

MetaRNN computational evidence supports a deleterious effect, 0.899

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RYR1	NM_000540.3 link	c.2924G>C	p.Arg975Pro	missense_variant	Exon 24 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.2924G>C	p.Arg975Pro	missense_variant	Exon 24 of 106	5	NM_000540.3	ENSP00000352608.2		P21817-1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461004

Hom.:

Cov.:

AF XY:

0.00

AC XY:

AN XY:

726820

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33472

American (AMR)

AF:

0.00

AC:

AN:

44688

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26090

East Asian (EAS)

AF:

0.00

AC:

AN:

39688

South Asian (SAS)

AF:

0.00

AC:

AN:

86176

European-Finnish (FIN)

AF:

0.00

AC:

AN:

52974

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5766

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111806

Other (OTH)

AF:

0.00

AC:

AN:

60344

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

EpiCase

AF:

0.0000545

EpiControl

AF:

0.00

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Uncertain

0.42

BayesDel_addAF

Pathogenic

0.25

BayesDel_noAF

Uncertain

0.12

CADD

Benign

(source)

DANN

Uncertain

0.99

DEOGEN2

Uncertain

0.65

.;D

Eigen

Uncertain

0.47

Eigen_PC

Uncertain

0.41

FATHMM_MKL

Uncertain

0.89

LIST_S2

Uncertain

0.91

D;D

M_CAP

Uncertain

0.27

MetaRNN

Pathogenic

0.90

D;D

MetaSVM

Uncertain

0.21

MutationAssessor

Benign

1.4

L;L

PhyloP100

4.4

PrimateAI

Uncertain

0.61

PROVEAN

Uncertain

-3.0

D;D

REVEL

Pathogenic

0.71

Sift

Benign

0.081

T;T

Polyphen

1.0

D;D

Vest4

0.73

MutPred

0.57

Gain of glycosylation at S972 (P = 0.0498);Gain of glycosylation at S972 (P = 0.0498);

MVP

0.97

MPC

1.2

ClinPred

0.98

GERP RS

2.7

Varity_R

0.58

gMVP

0.73

Mutation Taster

=38/62

disease causing

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.020

Details are displayed if max score is > 0.2

Find out detailed SpliceAI scores and Pangolin per-transcript scores at spliceailookup.broadinstitute.org

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Transcripts

RefSeq

Ensembl

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over