rs193922826

Positions:

• chr19-38504319-C-G
• chr19-38504319-C-T

Variant summary

Our verdict is Likely pathogenic. Variant got 6 ACMG points: 6P and 0B. PM2 PM5 PP2 PP3

The NM_000540.3(RYR1):​c.8026C>G​(p.Arg2676Gly) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000657 in 152,166 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. R2676W) has been classified as Likely pathogenic.

• Frequency: Genomes: 𝑓 0.0000066 (0 hom., cov: 31)
• Consequence: RYR1 NM_000540.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 1.02

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 Likely_pathogenic. Variant got 6 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr19-38504319-C-T is described in Lovd as [Likely_pathogenic].
• 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.
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.791

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	Protein	UniProt
RYR1	NM_000540.3	c.8026C>G	p.Arg2676Gly	missense_variant	50/106	ENST00000359596.8	NP_000531.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Protein	Appris	UniProt
RYR1	ENST00000359596.8	c.8026C>G	p.Arg2676Gly	missense_variant	50/106	5	NM_000540.3	ENSP00000352608	A2
RYR1	ENST00000355481.8	c.8026C>G	p.Arg2676Gly	missense_variant	50/105	1		ENSP00000347667	P4
RYR1	ENST00000594335.5	c.1480C>G	p.Arg494Gly	missense_variant, NMD_transcript_variant	11/49	1		ENSP00000470927
RYR1	ENST00000599547.6	c.8026C>G	p.Arg2676Gly	missense_variant, NMD_transcript_variant	50/80	2		ENSP00000471601

Frequencies

GnomAD3 genomes AF: 0.00000657 AC: 1 AN: 152166 Hom.: 0 Cov.: 31

Gnomad AFR AF: 0.00

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00

Gnomad ASJ AF: 0.00

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.00

Gnomad FIN AF: 0.00

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.0000147

Gnomad OTH AF: 0.00

GnomAD4 exome Cov.: 34

GnomAD4 genome AF: 0.00000657 AC: 1 AN: 152166 Hom.: 0 Cov.: 31 AF XY: 0.00 AC XY: 0 AN XY: 74312

Gnomad4 AFR AF: 0.00

Gnomad4 AMR AF: 0.00

Gnomad4 ASJ AF: 0.00

Gnomad4 EAS AF: 0.00

Gnomad4 SAS AF: 0.00

Gnomad4 FIN AF: 0.00

Gnomad4 NFE AF: 0.0000147

Gnomad4 OTH AF: 0.00

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.90
BayesDel_addAF	Pathogenic	0.26	D
BayesDel_noAF	Uncertain	0.13
CADD	Benign	21
DANN	Uncertain	0.99
DEOGEN2	Uncertain	0.78	.;D
Eigen	Benign	-0.18
Eigen_PC	Benign	-0.29
FATHMM_MKL	Benign	0.32	N
LIST_S2	Uncertain	0.96	D;D
M_CAP	Uncertain	0.13	D
MetaRNN	Pathogenic	0.79	D;D
MetaSVM	Benign	-0.35	T
MutationAssessor	Uncertain	2.0	M;M
MutationTaster	Benign	0.80	D;D;D
PrimateAI	Pathogenic	0.82	D
PROVEAN	Pathogenic	-5.0	D;D
REVEL	Uncertain	0.47
Sift	Benign	0.10	T;T
Polyphen		0.95	P;P
Vest4		0.84
MutPred		0.44		Gain of ubiquitination at K2677 (P = 0.0505);Gain of ubiquitination at K2677 (P = 0.0505);
MVP		0.91
MPC		0.44
ClinPred		0.90	D
GERP RS		2.9
Varity_R		0.49
gMVP		0.87

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: rs193922826; hg19: chr19-38994959;