Genetic Variant GYS1:p.Asn283Ser (chr19-48982813-T-C) – ACMG Classification: Uncertain_significance (2 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 2 ACMG points: 2P and 0B. PM2

The NM_002103.5(GYS1):c.848A>G(p.Asn283Ser) variant causes a missense change. The variant allele was found at a frequency of 0.00000137 in 1,458,734 control chromosomes in the GnomAD database, with no homozygous occurrence. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 0.0000014 ( 0 hom. )

Consequence

GYS1
NM_002103.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 6.26

Publications

7 publications found

Variant links:

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]

GYS1 Gene-Disease associations (from GenCC):

glycogen storage disease due to muscle and heart glycogen synthase deficiency
Inheritance: AR Classification: DEFINITIVE, STRONG, SUPPORTIVE Submitted by: Orphanet, ClinGen, Labcorp Genetics (formerly Invitae), Genomics England PanelApp

GYS1 links:

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new If you want to explore the variant's impact on the transcript NM_002103.5, check out the Mutation Effect Viewer. This is especially useful for frameshift variants or if you want to visualize the effect of exon loss / intron retention.

ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 2 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002103.5. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GYS1	NM_002103.5	MANE Select	c.848A>G	p.Asn283Ser	missense	Exon 6 of 16	NP_002094.2
GYS1	NM_001161587.2		c.656A>G	p.Asn219Ser	missense	Exon 5 of 15	NP_001155059.1	P13807-2
GYS1	NR_027763.2		n.863A>G		non_coding_transcript_exon	Exon 5 of 15

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GYS1	ENST00000323798.8	TSL:1 MANE Select	c.848A>G	p.Asn283Ser	missense	Exon 6 of 16	ENSP00000317904.3	P13807-1
GYS1	ENST00000263276.6	TSL:1	c.656A>G	p.Asn219Ser	missense	Exon 5 of 15	ENSP00000263276.6	P13807-2
GYS1	ENST00000960032.1		c.848A>G	p.Asn283Ser	missense	Exon 6 of 16	ENSP00000630091.1

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

0.00000137

AC:

AN:

1458734

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

725976

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33414

American (AMR)

AF:

0.00

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26114

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39678

South Asian (SAS)

AF:

0.00

AC:

AN:

86182

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.000173

AC:

AN:

5764

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

1109146

Other (OTH)

AF:

0.00

AC:

AN:

60300

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.450

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.0000162

Hom.:

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.20

BayesDel_addAF

Benign

-0.048

BayesDel_noAF

Benign

-0.31

CADD

Uncertain

(source)

DANN

Uncertain

1.0

DEOGEN2

Pathogenic

0.86

Eigen

Uncertain

0.42

Eigen_PC

Uncertain

0.46

FATHMM_MKL

Uncertain

0.95

LIST_S2

Uncertain

0.94

M_CAP

Benign

0.070

MetaRNN

Uncertain

0.58

MetaSVM

Uncertain

0.097

MutationAssessor

Uncertain

2.6

PhyloP100

6.3

PrimateAI

Uncertain

0.73

PROVEAN

Uncertain

-4.2

REVEL

Uncertain

0.46

Sift

Uncertain

0.018

Sift4G

Uncertain

0.031

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.7

Varity_R

0.40

gMVP

0.78

Mutation Taster

=64/36

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.12

Details are displayed if max score is > 0.2

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

Publications

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Variant summary

Frequency

Consequence

Scores

Clinical Significance

Conservation

Publications

ACMG classification

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

ClinVar

Computational scores

Splicing

Publications

Other links and lift over