20-25276693-C-G
Variant summary
Our verdict is Uncertain significance. Variant got 4 ACMG points: 4P and 0B. PM2PP3_Moderate
The NM_002862.4(PYGB):c.708C>G(p.Asn236Lys) variant causes a missense change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000000684 in 1,461,710 control chromosomes in the GnomAD database, with no homozygous occurrence. In-silico tool predicts a pathogenic outcome for this variant. Variant has been reported in ClinVar as Uncertain significance (★).
Frequency
Genomes: not found (cov: 33)
Exomes 𝑓: 6.8e-7 ( 0 hom. )
Consequence
PYGB
NM_002862.4 missense
NM_002862.4 missense
Scores
6
12
1
Clinical Significance
Conservation
PhyloP100: 1.39
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]
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ACMG classification
Classification made for transcript
Verdict is Uncertain_significance. Variant got 4 ACMG points.
PM2
?
Very rare variant in population databases, with high coverage;
PP3
?
MetaRNN computational evidence supports a deleterious effect, 0.862
Transcripts
RefSeq
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | MANE | UniProt |
---|---|---|---|---|---|---|---|
PYGB | NM_002862.4 | c.708C>G | p.Asn236Lys | missense_variant | 6/20 | ENST00000216962.9 | |
PYGB | XM_047440342.1 | c.708C>G | p.Asn236Lys | missense_variant | 6/16 |
Ensembl
Gene | Transcript | HGVSc | HGVSp | Effect | #exon/exons | TSL | MANE | Appris | UniProt |
---|---|---|---|---|---|---|---|---|---|
PYGB | ENST00000216962.9 | c.708C>G | p.Asn236Lys | missense_variant | 6/20 | 1 | NM_002862.4 | P1 |
Frequencies
GnomAD3 genomes ? Cov.: 33
GnomAD3 genomes
?
Cov.:
33
GnomAD3 exomes AF: 0.00000398 AC: 1AN: 251248Hom.: 0 AF XY: 0.00 AC XY: 0AN XY: 135820
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GnomAD4 exome AF: 6.84e-7 AC: 1AN: 1461710Hom.: 0 Cov.: 32 AF XY: 0.00 AC XY: 0AN XY: 727186
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GnomAD4 genome ? Cov.: 33
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Cov.:
33
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ClinVar
Significance: Uncertain significance
Submissions summary: Uncertain:1
Revision: criteria provided, single submitter
LINK: link
Submissions by phenotype
not specified Uncertain:1
Uncertain significance, criteria provided, single submitter | clinical testing | Ambry Genetics | Jun 28, 2022 | The c.708C>G (p.N236K) alteration is located in exon 6 (coding exon 6) of the PYGB gene. This alteration results from a C to G substitution at nucleotide position 708, causing the asparagine (N) at amino acid position 236 to be replaced by a lysine (K). Based on insufficient or conflicting evidence, the clinical significance of this alteration remains unclear. - |
Computational scores
Source:
Name
Calibrated prediction
Score
Prediction
AlphaMissense
Pathogenic
BayesDel_addAF
Uncertain
D
BayesDel_noAF
Uncertain
Cadd
Uncertain
Dann
Uncertain
DEOGEN2
Uncertain
D
Eigen
Uncertain
Eigen_PC
Uncertain
FATHMM_MKL
Uncertain
D
LIST_S2
Pathogenic
D
M_CAP
Uncertain
D
MetaRNN
Pathogenic
D
MetaSVM
Uncertain
D
MutationAssessor
Pathogenic
M
MutationTaster
Benign
D
PrimateAI
Uncertain
T
PROVEAN
Pathogenic
D
REVEL
Pathogenic
Sift
Uncertain
D
Sift4G
Uncertain
T
Polyphen
D
Vest4
MutPred
Gain of methylation at N236 (P = 0.0099);
MVP
MPC
ClinPred
D
GERP RS
Varity_R
gMVP
Splicing
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Prediction
SpliceAI score (max)
Details are displayed if max score is > 0.2
Find out detailed SpliceAI scores and Pangolin per-transcript scores at