19-48970606-G-C

Variant summary

Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2 PP3_Moderate

The NM_002103.5(GYS1):c.1749C>G(p.Ile583Met) variant causes a missense change. The variant was absent in control chromosomes in GnomAD project. In-silico tool predicts a pathogenic outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar. Synonymous variant affecting the same amino acid position (i.e. I583I) has been classified as Likely benign.

• Frequency: Genomes: not found (cov: 31)
• Consequence: GYS1 NM_002103.5 missense
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 4.71

Genes affected

GYS1 (HGNC:4706): (glycogen synthase 1) The protein encoded by this gene catalyzes the addition of glucose monomers to the growing glycogen molecule through the formation of alpha-1,4-glycoside linkages. Mutations in this gene are associated with muscle glycogen storage disease. Alternatively spliced transcript variants encoding different isoforms have been found for this gene.[provided by RefSeq, Sep 2009]

ACMG classification

Verdict is Uncertain_significance. Variant got 4 ACMG points.

• PM2: Very rare variant in population databases, with high coverage
• PP3: MetaRNN computational evidence supports a deleterious effect, 0.907

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	MANE	UniProt
GYS1	NM_002103.5	c.1749C>G	p.Ile583Met	missense_variant	14/16	ENST00000323798.8
GYS1	NM_001161587.2	c.1557C>G	p.Ile519Met	missense_variant	13/15
GYS1	NR_027763.2	n.1764C>G		non_coding_transcript_exon_variant	13/15

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	#exon/exons	TSL	MANE	Appris	UniProt
GYS1	ENST00000323798.8	c.1749C>G	p.Ile583Met	missense_variant	14/16	1	NM_002103.5	P1
GYS1	ENST00000263276.6	c.1557C>G	p.Ile519Met	missense_variant	13/15	1
GYS1	ENST00000594220.1	c.105C>G	p.Ile35Met	missense_variant	1/1

Frequencies

GnomAD3 genomes Cov.: 31

GnomAD4 exome Cov.: 31

GnomAD4 genome Cov.: 31

Bravo AF: 0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name	Calibrated prediction	Score	Prediction
AlphaMissense	Pathogenic	0.88
BayesDel_addAF	Pathogenic	0.18	D
BayesDel_noAF	Uncertain	0.020
Cadd	Uncertain	25
Dann	Uncertain	1.0
DEOGEN2	Uncertain	0.77	D;.
Eigen	Uncertain	0.66
Eigen_PC	Uncertain	0.59
FATHMM_MKL	Uncertain	0.88	D
LIST_S2	Pathogenic	0.98	D;D
M_CAP	Uncertain	0.093	D
MetaRNN	Pathogenic	0.91	D;D
MetaSVM	Uncertain	0.13	D
MutationAssessor	Pathogenic	3.0	M;.
MutationTaster	Benign	1.0	D;D;D;D
PrimateAI	Pathogenic	0.85	D
PROVEAN	Uncertain	-2.4	N;N
REVEL	Pathogenic	0.68
Sift	Pathogenic	0.0	D;D
Sift4G	Uncertain	0.0070	D;D
Polyphen		1.0	D;.
Vest4		0.65
MutPred		0.84		Gain of disorder (P = 0.0525);.;
MVP		0.83
MPC		1.3
ClinPred		0.99	D
GERP RS		4.1
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.7
Varity_R		0.74
gMVP		0.73

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.030		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: rs146698792; hg19: chr19-49473863;