Genetic Variant PYGB:p.Lys30Glu (chr20-25248266-A-G) – ACMG Classification: Uncertain_significance (1 pts)

Variant summary

Our verdict is Uncertain significance. The variant received 1 ACMG points: 2P and 1B. PM2BP4

The NM_002862.4(PYGB):c.88A>G(p.Lys30Glu) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00000658 in 151,992 control chromosomes in the GnomAD database, with no homozygous occurrence. 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. K30Q) has been classified as Uncertain significance.

Frequency

Genomes: 𝑓 0.0000066 ( 0 hom., cov: 34)

Consequence

PYGB
NM_002862.4 missense

Scores

Clinical Significance

Not reported in ClinVar

Conservation

PhyloP100: 1.60

Publications

3 publications found

Variant links:

Genes affected

PYGB (HGNC:9723): (glycogen phosphorylase B) The protein encoded by this gene is a glycogen phosphorylase found predominantly in the brain. The encoded protein forms homodimers which can associate into homotetramers, the enzymatically active form of glycogen phosphorylase. The activity of this enzyme is positively regulated by AMP and negatively regulated by ATP, ADP, and glucose-6-phosphate. This enzyme catalyzes the rate-determining step in glycogen degradation. [provided by RefSeq, Jul 2008]

PYGB links:

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ACMG classification

Classification was made for transcript

Our verdict: Uncertain_significance. The variant received 1 ACMG points.

PM2

Very rare variant in population databases, with high coverage;

BP4

Computational evidence support a benign effect (MetaRNN=0.37462032).

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_002862.4. 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
	PYGB	NM_002862.4	MANE Select	c.88A>G	p.Lys30Glu	missense	Exon 1 of 20	NP_002853.2

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
PYGB	ENST00000216962.9	TSL:1 MANE Select	c.88A>G	p.Lys30Glu	missense	Exon 1 of 20	ENSP00000216962.3	P11216
PYGB	ENST00000896654.1		c.88A>G	p.Lys30Glu	missense	Exon 1 of 21	ENSP00000566713.1
PYGB	ENST00000944638.1		c.88A>G	p.Lys30Glu	missense	Exon 1 of 21	ENSP00000614697.1

Frequencies

GnomAD3 genomes

AF:

0.00000658

AC:

AN:

151880

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.00

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.00

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.000195

Gnomad SAS

AF:

0.00

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.00

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.00000422

AC:

AN:

237060

AF XY:

0.00000776

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.00

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000589

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.00

Gnomad OTH exome

AF:

0.00

GnomAD4 exome

Cov.:

GnomAD4 genome

AF:

0.00000658

AC:

AN:

151992

Hom.:

Cov.:

AF XY:

0.0000135

AC XY:

AN XY:

74312

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41490

American (AMR)

AF:

0.00

AC:

AN:

15296

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.000196

AC:

AN:

5102

South Asian (SAS)

AF:

0.00

AC:

AN:

4816

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10578

Middle Eastern (MID)

AF:

0.00

AC:

AN:

290

European-Non Finnish (NFE)

AF:

0.00

AC:

AN:

67932

Other (OTH)

AF:

0.00

AC:

AN:

2106

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.475

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

AlphaMissense

Benign

0.24

BayesDel_addAF

Uncertain

0.036

BayesDel_noAF

Benign

-0.19

CADD

Uncertain

(source)

DANN

Benign

0.97

DEOGEN2

Benign

0.41

Eigen

Benign

-0.40

Eigen_PC

Benign

-0.29

FATHMM_MKL

Uncertain

0.92

LIST_S2

Uncertain

0.96

M_CAP

Pathogenic

0.43

MetaRNN

Benign

0.37

MetaSVM

Benign

-0.62

MutationAssessor

Benign

1.5

PhyloP100

1.6

PrimateAI

Pathogenic

0.81

PROVEAN

Benign

-1.7

REVEL

Uncertain

0.33

Sift

Benign

0.19

Sift4G

Benign

0.33

Polyphen

0.0

Vest4

0.53

MutPred

0.40

Loss of MoRF binding (P = 0.0139)

MVP

0.82

MPC

0.28

ClinPred

0.51

GERP RS

1.6

PromoterAI

-0.18

Neutral

(source)

RBP_binding_hub_radar

0.0

RBP_regulation_power_radar

1.0

Varity_R

0.41

gMVP

0.54

Mutation Taster

=66/34

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

You must be logged in to view publications. This limit was set because tens of millions (!) of queries from AI bots are generated daily.

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