Genetic Variant GYS1:p.Glu627Gln (chr19-48969786-C-G) – ACMG Classification: Uncertain_significance (0 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 0 ACMG points: 2P and 2B. PM2BP4_Moderate

The NM_002103.5(GYS1):c.1879G>C(p.Glu627Gln) variant causes a missense change. The variant allele was found at a frequency of 0.000000684 in 1,461,616 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a benign outcome for this variant. 14/22 in silico tools predict 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. E627K) has been classified as Uncertain significance.

Frequency

Genomes: not found (cov: 32)

Exomes 𝑓: 6.8e-7 ( 0 hom. )

Consequence

GYS1
NM_002103.5 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 4.23

Publications

0 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: Labcorp Genetics (formerly Invitae), PanelApp Australia, ClinGen, Genomics England PanelApp, Orphanet

GYS1 links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 0 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.21229324).

Transcripts

RefSeq

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	MANE	Protein	UniProt
GYS1	NM_002103.5 link	c.1879G>C	p.Glu627Gln	missense_variant	Exon 15 of 16	ENST00000323798.8	NP_002094.2	P13807-1
GYS1	NM_001161587.2 link	c.1687G>C	p.Glu563Gln	missense_variant	Exon 14 of 15		NP_001155059.1	P13807-2
GYS1	NR_027763.2 link	n.1894G>C		non_coding_transcript_exon_variant	Exon 14 of 15

Ensembl

Gene	Transcript	HGVSc	HGVSp	Effect	Exon rank	TSL	MANE	Protein	Appris	UniProt
GYS1	ENST00000323798.8 link	c.1879G>C	p.Glu627Gln	missense_variant	Exon 15 of 16	1	NM_002103.5	ENSP00000317904.3		P13807-1
GYS1	ENST00000263276.6 link	c.1687G>C	p.Glu563Gln	missense_variant	Exon 14 of 15	1		ENSP00000263276.6		P13807-2

Frequencies

GnomAD3 genomes

Cov.:

GnomAD4 exome

AF:

6.84e-7

AC:

AN:

1461616

Hom.:

Cov.:

AF XY:

0.00000138

AC XY:

AN XY:

727124

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33472

American (AMR)

AF:

0.00

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26136

East Asian (EAS)

AF:

0.00

AC:

AN:

39700

South Asian (SAS)

AF:

0.00

AC:

AN:

86254

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53292

Middle Eastern (MID)

AF:

0.00

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

8.99e-7

AC:

AN:

1111882

Other (OTH)

AF:

0.00

AC:

AN:

60392

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.425

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

GnomAD4 genome

Cov.:

Alfa

AF:

0.00

Hom.:

Bravo

AF:

0.00000378

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.3

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.098

BayesDel_addAF

Benign

-0.14

BayesDel_noAF

Benign

-0.44

CADD

Benign

(source)

DANN

Uncertain

0.98

DEOGEN2

Benign

0.39

T;.

Eigen

Benign

-0.23

Eigen_PC

Benign

-0.17

FATHMM_MKL

Uncertain

0.92

LIST_S2

Benign

0.74

T;T

M_CAP

Benign

0.024

MetaRNN

Benign

0.21

T;T

MetaSVM

Benign

-0.97

MutationAssessor

Benign

1.5

L;.

PhyloP100

4.2

PrimateAI

Uncertain

0.58

PROVEAN

Benign

-0.69

N;N

REVEL

Benign

0.089

Sift

Benign

0.20

T;T

Sift4G

Benign

0.39

T;T

Polyphen

0.68

P;.

Vest4

0.25

MutPred

0.51

Gain of catalytic residue at E627 (P = 0.1123);.;

MVP

0.72

MPC

1.1

ClinPred

0.79

GERP RS

3.3

Varity_R

0.071

gMVP

0.35

Mutation Taster

=88/12

polymorphism

(source)

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

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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