chr12-21574245-C-T

Variant names:

Variant summary

Our verdict is Benign. The variant received -20 ACMG points: 0P and 20B. BP4_StrongBP6_Very_StrongBS1BS2

The NM_021957.4(GYS2):c.577G>A(p.Ala193Thr) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000755 in 1,613,666 control chromosomes in the GnomAD database, including 15 homozygotes. In-silico tool predicts a benign outcome for this variant. 14/21 in silico tools predict a benign outcome for this variant. Variant has been reported in ClinVar as Benign (★★).

Frequency

Genomes: 𝑓 0.0043 ( 7 hom., cov: 32)

Exomes 𝑓: 0.00039 ( 8 hom. )

Consequence

GYS2
NM_021957.4 missense

Scores

Clinical Significance

Benign criteria provided, multiple submitters, no conflicts B:6

Conservation

PhyloP100: 1.66

Publications

4 publications found

Variant links:

Genes affected

GYS2 (HGNC:4707): (glycogen synthase 2) The protein encoded by this gene, liver glycogen synthase, catalyzes the rate-limiting step in the synthesis of glycogen - the transfer of a glucose molecule from UDP-glucose to a terminal branch of the glycogen molecule. Mutations in this gene cause glycogen storage disease type 0 (GSD-0) - a rare type of early childhood fasting hypoglycemia with decreased liver glycogen content. [provided by RefSeq, Dec 2009]

GYS2 Gene-Disease associations (from GenCC):

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

GYS2 links:

ENSG00000285854 (HGNC:):

ENSG00000285854 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -20 ACMG points.

BP4

Computational evidence support a benign effect (MetaRNN=0.009910017).

BP6

Variant 12-21574245-C-T is Benign according to our data. Variant chr12-21574245-C-T is described in ClinVar as Benign. ClinVar VariationId is 261471.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00428 (651/152154) while in subpopulation AFR AF = 0.0148 (613/41534). AF 95% confidence interval is 0.0138. There are 7 homozygotes in GnomAd4. There are 306 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High Homozygotes in GnomAd4 at 7 AR gene

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_021957.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Sel.	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	GYS2	NM_021957.4	MANE Select	c.577G>A	p.Ala193Thr	missense	Exon 4 of 16	NP_068776.2	P54840

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
GYS2	ENST00000261195.3	TSL:1 MANE Select	c.577G>A	p.Ala193Thr	missense	Exon 4 of 16	ENSP00000261195.2	P54840
ENSG00000285854	ENST00000647960.1		n.*579G>A		non_coding_transcript_exon	Exon 11 of 23	ENSP00000497202.1	A0A3B3IS95
ENSG00000285854	ENST00000647960.1		n.*579G>A		3_prime_UTR	Exon 11 of 23	ENSP00000497202.1	A0A3B3IS95

Frequencies

GnomAD3 genomes

AF:

0.00428

AC:

651

AN:

152036

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0148

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00197

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:

0.0000294

Gnomad OTH

AF:

0.00287

GnomAD2 exomes

AF:

0.000916

AC:

230

AN:

251222

AF XY:

0.000678

show subpopulations

Gnomad AFR exome

AF:

0.0134

Gnomad AMR exome

AF:

0.000289

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00000881

Gnomad OTH exome

AF:

0.000163

GnomAD4 exome

AF:

0.000389

AC:

568

AN:

1461512

Hom.:

Cov.:

AF XY:

0.000322

AC XY:

234

AN XY:

727088

show subpopulations

African (AFR)

AF:

0.0148

AC:

496

AN:

33478

American (AMR)

AF:

0.000514

AC:

AN:

44724

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26130

East Asian (EAS)

AF:

0.00

AC:

AN:

39696

South Asian (SAS)

AF:

0.00

AC:

AN:

86248

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53416

Middle Eastern (MID)

AF:

0.000867

AC:

AN:

5768

European-Non Finnish (NFE)

AF:

0.00000180

AC:

AN:

1111672

Other (OTH)

AF:

0.000696

AC:

AN:

60380

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.474

Heterozygous variant carriers

119

149

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome Hom

Variant carriers

100

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

GnomAD4 genome

AF:

0.00428

AC:

651

AN:

152154

Hom.:

Cov.:

AF XY:

0.00411

AC XY:

306

AN XY:

74372

show subpopulations

African (AFR)

AF:

0.0148

AC:

613

AN:

41534

American (AMR)

AF:

0.00196

AC:

AN:

15286

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3472

East Asian (EAS)

AF:

0.00

AC:

AN:

5168

South Asian (SAS)

AF:

0.00

AC:

AN:

4818

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10560

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000294

AC:

AN:

67998

Other (OTH)

AF:

0.00284

AC:

AN:

2112

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.502

Heterozygous variant carriers

116

145

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

Genome Hom

Variant carriers

<30

30-35

35-40

40-45

45-50

50-55

55-60

60-65

65-70

70-75

75-80

>80

Age

Alfa

AF:

0.00173

Hom.:

Bravo

AF:

0.00489

ESP6500AA

AF:

0.0134

AC:

ESP6500EA

AF:

0.000116

AC:

ExAC

AF:

0.00120

AC:

146

Asia WGS

AF:

0.000866

AC:

AN:

3478

ClinVar

ClinVar submissions

Significance:Benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

Glycogen storage disorder due to hepatic glycogen synthase deficiency (2)

not provided (2)

not specified (2)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.074

BayesDel_addAF

Benign

-0.51

BayesDel_noAF

Benign

-0.50

CADD

Benign

(source)

DANN

Benign

0.97

DEOGEN2

Benign

0.20

Eigen

Benign

-0.31

Eigen_PC

Benign

-0.061

FATHMM_MKL

Benign

0.63

LIST_S2

Benign

0.78

MetaRNN

Benign

0.0099

MetaSVM

Benign

-0.99

MutationAssessor

Benign

0.46

PhyloP100

1.7

PrimateAI

Benign

0.41

PROVEAN

Benign

0.74

REVEL

Uncertain

0.30

Sift

Benign

0.48

Sift4G

Benign

0.59

Polyphen

0.0070

Vest4

0.078

MVP

0.76

MPC

0.17

ClinPred

0.010

GERP RS

4.4

Varity_R

0.045

gMVP

0.35

Mutation Taster

=80/20

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

Variant Effect in Transcripts

RefSeq Transcripts

Ensembl Transcripts

Frequencies

Age Distribution

Age Distribution

ClinVar

Computational scores

Splicing

Publications

Other links and lift over