Genetic Variant PRKAG2:p.Gly80Gly (chr7-151781378-G-T) – ACMG Classification: Benign (-14 pts)

Variant summary

Our verdict is Benign. The variant received -14 ACMG points: 0P and 14B. BP4_StrongBP6BP7BS1BS2

The NM_016203.4(PRKAG2):c.240C>A(p.Gly80Gly) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.00015 in 1,612,690 control chromosomes in the GnomAD database, including 4 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Conflicting classifications of pathogenicity (no stars). Synonymous variant affecting the same amino acid position (i.e. G80G) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.000092 ( 0 hom., cov: 32)

Exomes 𝑓: 0.00016 ( 4 hom. )

Consequence

PRKAG2
NM_016203.4 synonymous

Scores

Clinical Significance

Conflicting classifications of pathogenicity criteria provided, conflicting classifications U:2B:12

Conservation

PhyloP100: 0.269

Publications

2 publications found

Variant links:

Genes affected

PRKAG2 (HGNC:9386): (protein kinase AMP-activated non-catalytic subunit gamma 2) AMP-activated protein kinase (AMPK) is a heterotrimeric protein composed of a catalytic alpha subunit, a noncatalytic beta subunit, and a noncatalytic regulatory gamma subunit. Various forms of each of these subunits exist, encoded by different genes. AMPK is an important energy-sensing enzyme that monitors cellular energy status and functions by inactivating key enzymes involved in regulating de novo biosynthesis of fatty acid and cholesterol. This gene is a member of the AMPK gamma subunit family. Mutations in this gene have been associated with Wolff-Parkinson-White syndrome, familial hypertrophic cardiomyopathy, and glycogen storage disease of the heart. Alternate transcriptional splice variants, encoding different isoforms, have been characterized. [provided by RefSeq, Jan 2015]

PRKAG2 Gene-Disease associations (from GenCC):

hypertrophic cardiomyopathy 6
Inheritance: AD Classification: DEFINITIVE, STRONG Submitted by: G2P, Labcorp Genetics (formerly Invitae)
PRKAG2-related cardiomyopathy
Inheritance: AD Classification: DEFINITIVE Submitted by: ClinGen
lethal congenital glycogen storage disease of heart
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp
Wolff-Parkinson-White syndrome
Inheritance: AD Classification: STRONG Submitted by: Genomics England PanelApp, Labcorp Genetics (formerly Invitae)

PRKAG2 links:

Genome browser will be placed here

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -14 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.47).

BP6

Variant 7-151781378-G-T is Benign according to our data. Variant chr7-151781378-G-T is described in ClinVar as Conflicting_classifications_of_pathogenicity. ClinVar VariationId is 45710.

BP7

Synonymous conserved (PhyloP=0.269 with no splicing effect.

BS1

Variant frequency is greater than expected in population sas. GnomAd4 allele frequency = 0.0000919 (14/152306) while in subpopulation SAS AF = 0.000621 (3/4828). AF 95% confidence interval is 0.000169. There are 0 homozygotes in GnomAd4. There are 7 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 14 AD gene.

Variant Effect in Transcripts

ACMG analysis was done for transcript: NM_016203.4. You can select a different transcript below to see updated ACMG assignments.

RefSeq Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein
PRKAG2	NM_016203.4	MANE Select	c.240C>A	p.Gly80Gly	synonymous	Exon 3 of 16	NP_057287.2
PRKAG2	NM_001407021.1		c.240C>A	p.Gly80Gly	synonymous	Exon 3 of 15	NP_001393950.1
PRKAG2	NM_001407022.1		c.240C>A	p.Gly80Gly	synonymous	Exon 3 of 15	NP_001393951.1

Ensembl Transcripts

Gene	Transcript	Tags	HGVSc	HGVSp	Effect	Exon Rank	Protein	UniProt
PRKAG2	ENST00000287878.9	TSL:1 MANE Select	c.240C>A	p.Gly80Gly	synonymous	Exon 3 of 16	ENSP00000287878.3	Q9UGJ0-1
PRKAG2	ENST00000392801.6	TSL:1	c.108C>A	p.Gly36Gly	synonymous	Exon 3 of 16	ENSP00000376549.2	Q9UGJ0-3
PRKAG2	ENST00000488258.5	TSL:1	n.240C>A		non_coding_transcript_exon	Exon 3 of 10	ENSP00000420783.1	F8WDA1

Frequencies

GnomAD3 genomes

AF:

0.0000920

AC:

AN:

152188

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:

0.000193

Gnomad SAS

AF:

0.000621

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00316

Gnomad NFE

AF:

0.000132

Gnomad OTH

AF:

0.00

GnomAD2 exomes

AF:

0.000325

AC:

AN:

243194

AF XY:

0.000453

show subpopulations

Gnomad AFR exome

AF:

0.00

Gnomad AMR exome

AF:

0.0000292

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.0000551

Gnomad FIN exome

AF:

0.0000480

Gnomad NFE exome

AF:

0.000138

Gnomad OTH exome

AF:

0.000506

GnomAD4 exome

AF:

0.000156

AC:

228

AN:

1460384

Hom.:

Cov.:

AF XY:

0.000211

AC XY:

153

AN XY:

726434

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

33476

American (AMR)

AF:

0.0000224

AC:

AN:

44562

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26098

East Asian (EAS)

AF:

0.00

AC:

AN:

39680

South Asian (SAS)

AF:

0.00171

AC:

147

AN:

86172

European-Finnish (FIN)

AF:

0.0000189

AC:

AN:

52842

Middle Eastern (MID)

AF:

0.00279

AC:

AN:

5734

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

1111520

Other (OTH)

AF:

0.000232

AC:

AN:

60300

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.495

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Exome Het

Exome 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

GnomAD4 genome

AF:

0.0000919

AC:

AN:

152306

Hom.:

Cov.:

AF XY:

0.0000940

AC XY:

AN XY:

74486

show subpopulations

African (AFR)

AF:

0.00

AC:

AN:

41554

American (AMR)

AF:

0.00

AC:

AN:

15308

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3468

East Asian (EAS)

AF:

0.000193

AC:

AN:

5180

South Asian (SAS)

AF:

0.000621

AC:

AN:

4828

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10624

Middle Eastern (MID)

AF:

0.00340

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.000132

AC:

AN:

68022

Other (OTH)

AF:

0.00

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.479

Heterozygous variant carriers

0.00

0.20

0.40

0.60

0.80

0.95

Allele balance

Age Distribution

Genome Het

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:

0.000253

Hom.:

Bravo

AF:

0.0000907

Asia WGS

AF:

0.00289

AC:

AN:

3478

ClinVar

ClinVar submissions

Significance:Conflicting classifications of pathogenicity

Revision:criteria provided, conflicting classifications

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (4)

Cardiomyopathy (2)

not provided (2)

Cardiovascular phenotype (1)

Hypertrophic cardiomyopathy (1)

Hypertrophic cardiomyopathy 6 (1)

Lethal congenital glycogen storage disease of heart (1)

PRKAG2-related disorder (1)

Wolff-Parkinson-White pattern (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.47

CADD

Benign

5.6

(source)

DANN

Benign

0.74

PhyloP100

0.27

Mutation Taster

=100/0

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