rs193922790

Variant names:

• chr19-38494621-A-G
• rs193922790
• NM_000540.3:c.6544A>G

Your query was ambiguous. Multiple possible variants found:

• chr19-38494621-A-G
• chr19-38494621-A-T

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 5P and 1B. PM2 PM5 PP2 BP4

The NM_000540.3(RYR1):​c.6544A>G​(p.Ile2182Val) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a benign 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. I2182F) has been classified as Pathogenic.

• Frequency: Genomes: not found (cov: 31)
• Consequence: RYR1 NM_000540.3 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 2.60

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 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PM5: Other missense variant is known to change same aminoacid residue: Variant chr19-38494621-A-T is described in Lovd as [Pathogenic].
• 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=0.3853998).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
RYR1	NM_000540.3	c.6544A>G	p.Ile2182Val	missense_variant	Exon 39 of 106	ENST00000359596.8	NP_000531.2

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
RYR1	ENST00000359596.8	c.6544A>G	p.Ile2182Val	missense_variant	Exon 39 of 106	5	NM_000540.3	ENSP00000352608.2
RYR1	ENST00000355481.8	c.6544A>G	p.Ile2182Val	missense_variant	Exon 39 of 105	1		ENSP00000347667.3
RYR1	ENST00000599547.6	n.6544A>G		non_coding_transcript_exon_variant	Exon 39 of 80	2		ENSP00000471601.2

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 32

GnomAD4 genome Cov.: 31

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Uncertain	0.38
BayesDel_addAF	Uncertain	0.14	D
BayesDel_noAF	Uncertain	-0.040
CADD	Benign	21
DANN	Benign	0.92
DEOGEN2	Uncertain	0.66	.;D
Eigen	Benign	-0.24
Eigen_PC	Benign	-0.10
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Uncertain	0.97	D;D
M_CAP	Uncertain	0.089	D
MetaRNN	Benign	0.39	T;T
MetaSVM	Uncertain	0.17	D
MutationAssessor	Benign	0.34	N;N
PrimateAI	Uncertain	0.62	T
PROVEAN	Benign	-0.97	N;N
REVEL	Uncertain	0.56
Sift	Uncertain	0.0020	D;D
Polyphen		0.26	B;B
Vest4		0.47
MutPred		0.65		Gain of MoRF binding (P = 0.1374);Gain of MoRF binding (P = 0.1374);
MVP		0.95
MPC		0.28
ClinPred		0.75	D
GERP RS		4.4
Varity_R		0.32
gMVP		0.59

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

Other links and lift over

dbSNP: rs193922790; hg19: chr19-38985261;