20-25286264-G-A

Variant names:

• chr20-25286264-G-A
• rs139672965
• NM_002862.4:c.1768+2013G>A

Variant summary

Our verdict is Benign. The variant received -8 ACMG points: 0P and 8B. BP4_Strong BS2

The NM_002862.4(PYGB):​c.1768+2013G>A variant causes a intron change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00601 in 152,330 control chromosomes in the GnomAD database, including 2 homozygotes. In-silico tool predicts a benign outcome for this variant. No clinical diagnostic laboratories have submitted clinical-significance assessments for this variant to ClinVar.

• Frequency: Genomes: 𝑓 0.0060 (2 hom., cov: 33)
• Consequence: PYGB NM_002862.4 intron
• Clinical Significance: Not reported in ClinVar
• Conservation: PhyloP100: 0.238
• Publications: 4 publications found

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]

ACMG classification

Our verdict: Benign. The variant received -8 ACMG points.

• BP4: Computational evidence support a benign effect (BayesDel_noAF=-0.85).
• BS2: High Homozygotes in GnomAd4 at 2 AR gene

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

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PYGB	NM_002862.4	MANE Select	c.1768+2013G>A		intron	N/A	NP_002853.2

Ensembl Transcripts

Selected	Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
	PYGB	ENST00000216962.9	TSL:1 MANE Select	c.1768+2013G>A		intron	N/A	ENSP00000216962.3

Frequencies

GnomAD3 genomes AF: 0.00600 AC: 914 AN: 152212 Hom.: 2 Cov.: 33

Gnomad AFR AF: 0.00203

Gnomad AMI AF: 0.00

Gnomad AMR AF: 0.00714

Gnomad ASJ AF: 0.00778

Gnomad EAS AF: 0.00

Gnomad SAS AF: 0.000207

Gnomad FIN AF: 0.00377

Gnomad MID AF: 0.00

Gnomad NFE AF: 0.00936

Gnomad OTH AF: 0.00764

We have no GnomAD4 exomes data on this position. Probably position not covered by the project.

GnomAD4 genome AF: 0.00601 AC: 915 AN: 152330 Hom.: 2 Cov.: 33 AF XY: 0.00573 AC XY: 427 AN XY: 74488

African (AFR) AF: 0.00202 AC: 84 AN: 41572

American (AMR) AF: 0.00713 AC: 109 AN: 15294

Ashkenazi Jewish (ASJ) AF: 0.00778 AC: 27 AN: 3472

East Asian (EAS) AF: 0.00 AC: 0 AN: 5184

South Asian (SAS) AF: 0.000207 AC: 1 AN: 4826

European-Finnish (FIN) AF: 0.00377 AC: 40 AN: 10622

Middle Eastern (MID) AF: 0.00 AC: 0 AN: 294

European-Non Finnish (NFE) AF: 0.00936 AC: 637 AN: 68038

Other (OTH) AF: 0.00803 AC: 17 AN: 2116

Alfa AF: 0.00176 Hom.: 0

Bravo AF: 0.00615

Asia WGS AF: 0.000289 AC: 1 AN: 3478

ClinVar

Not reported in ClinVar

Computational scores

Source: dbNSFP v4.9

Name	Calibrated prediction	Score	Prediction
BayesDel_noAF	Benign	-0.85
CADD	Benign	3.1
DANN	Benign	0.57
PhyloP100		0.24
RBP_binding_hub_radar		0.0
RBP_regulation_power_radar		1.1

Splicing

Name	Calibrated prediction	Score	Prediction
SpliceAI score (max)		0.020		Details are displayed if max score is > 0.2

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

Other links and lift over

dbSNP: rs139672965; hg19: chr20-25266900;