Genetic Variant PRKAG2:p.Thr432Thr (chr7-151565823-C-T) – ACMG Classification: Benign (-21 pts)

Variant summary

Our verdict is Benign. The variant received -21 ACMG points: 0P and 21B. BP4_StrongBP6_Very_StrongBP7BS1BS2

The NM_016203.4(PRKAG2):c.1296G>A(p.Thr432Thr) variant causes a synonymous change involving the alteration of a non-conserved nucleotide. The variant allele was found at a frequency of 0.000538 in 1,612,402 control chromosomes in the GnomAD database, including 6 homozygotes. In-silico tool predicts a benign outcome for this variant. Variant has been reported in ClinVar as Likely benign (★★). Synonymous variant affecting the same amino acid position (i.e. T432T) has been classified as Likely benign.

Frequency

Genomes: 𝑓 0.0028 ( 4 hom., cov: 32)

Exomes 𝑓: 0.00030 ( 2 hom. )

Consequence

PRKAG2
NM_016203.4 synonymous

Scores

Clinical Significance

Benign/Likely benign criteria provided, multiple submitters, no conflicts B:17

Conservation

PhyloP100: -0.731

Publications

3 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: Labcorp Genetics (formerly Invitae), Genomics England PanelApp

PRKAG2 links:

Genome browser will be placed here

new If you want to explore the variant's impact on the transcript NM_016203.4, check out the Mutation Effect Viewer. This is especially useful for frameshift variants or if you want to visualize the effect of exon loss / intron retention.

ACMG classification

Classification was made for transcript

Our verdict: Benign. The variant received -21 ACMG points.

BP4

Computational evidence support a benign effect (BayesDel_noAF=-0.76).

BP6

Variant 7-151565823-C-T is Benign according to our data. Variant chr7-151565823-C-T is described in ClinVar as Benign/Likely_benign. ClinVar VariationId is 177715.Status of the report is criteria_provided_multiple_submitters_no_conflicts, 2 stars.

BP7

Synonymous conserved (PhyloP=-0.731 with no splicing effect.

BS1

Variant frequency is greater than expected in population afr. GnomAd4 allele frequency = 0.00282 (430/152272) while in subpopulation AFR AF = 0.00996 (414/41554). AF 95% confidence interval is 0.00917. There are 4 homozygotes in GnomAd4. There are 195 alleles in the male GnomAd4 subpopulation. Median coverage is 32. This position passed quality control check.

BS2

High AC in GnomAd4 at 430 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.1296G>A	p.Thr432Thr	synonymous	Exon 12 of 16	NP_057287.2
PRKAG2	NM_001407021.1		c.1296G>A	p.Thr432Thr	synonymous	Exon 12 of 15	NP_001393950.1
PRKAG2	NM_001407022.1		c.1293G>A	p.Thr431Thr	synonymous	Exon 12 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.1296G>A	p.Thr432Thr	synonymous	Exon 12 of 16	ENSP00000287878.3	Q9UGJ0-1
PRKAG2	ENST00000392801.6	TSL:1	c.1164G>A	p.Thr388Thr	synonymous	Exon 12 of 16	ENSP00000376549.2	Q9UGJ0-3
PRKAG2	ENST00000418337.6	TSL:1	c.573G>A	p.Thr191Thr	synonymous	Exon 8 of 12	ENSP00000387386.2	Q9UGJ0-2

Frequencies

GnomAD3 genomes

AF:

0.00284

AC:

432

AN:

152154

Hom.:

Cov.:

show subpopulations

Gnomad AFR

AF:

0.0100

Gnomad AMI

AF:

0.00

Gnomad AMR

AF:

0.000655

Gnomad ASJ

AF:

0.00

Gnomad EAS

AF:

0.00

Gnomad SAS

AF:

0.000207

Gnomad FIN

AF:

0.00

Gnomad MID

AF:

0.00

Gnomad NFE

AF:

0.0000441

Gnomad OTH

AF:

0.00143

GnomAD2 exomes

AF:

0.000740

AC:

186

AN:

251468

AF XY:

0.000471

show subpopulations

Gnomad AFR exome

AF:

0.00929

Gnomad AMR exome

AF:

0.000781

Gnomad ASJ exome

AF:

0.00

Gnomad EAS exome

AF:

0.00

Gnomad FIN exome

AF:

0.00

Gnomad NFE exome

AF:

0.0000352

Gnomad OTH exome

AF:

0.000489

GnomAD4 exome

AF:

0.000300

AC:

438

AN:

1460130

Hom.:

Cov.:

AF XY:

0.000248

AC XY:

180

AN XY:

726472

show subpopulations

African (AFR)

AF:

0.0101

AC:

338

AN:

33442

American (AMR)

AF:

0.000783

AC:

AN:

44720

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

26132

East Asian (EAS)

AF:

0.0000252

AC:

AN:

39690

South Asian (SAS)

AF:

0.0000812

AC:

AN:

86212

European-Finnish (FIN)

AF:

0.00

AC:

AN:

53418

Middle Eastern (MID)

AF:

0.000694

AC:

AN:

5762

European-Non Finnish (NFE)

AF:

0.0000153

AC:

AN:

1110408

Other (OTH)

AF:

0.000597

AC:

AN:

60346

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.481

Heterozygous variant carriers

118

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:

0.00282

AC:

430

AN:

152272

Hom.:

Cov.:

AF XY:

0.00262

AC XY:

195

AN XY:

74458

show subpopulations

African (AFR)

AF:

0.00996

AC:

414

AN:

41554

American (AMR)

AF:

0.000654

AC:

AN:

15294

Ashkenazi Jewish (ASJ)

AF:

0.00

AC:

AN:

3470

East Asian (EAS)

AF:

0.00

AC:

AN:

5190

South Asian (SAS)

AF:

0.00

AC:

AN:

4826

European-Finnish (FIN)

AF:

0.00

AC:

AN:

10594

Middle Eastern (MID)

AF:

0.00

AC:

AN:

294

European-Non Finnish (NFE)

AF:

0.0000441

AC:

AN:

68022

Other (OTH)

AF:

0.00142

AC:

AN:

2116

Allele Balance Distribution

Red line indicates average allele balance

Average allele balance: 0.504

Heterozygous variant carriers

109

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:

0.00156

Hom.:

Bravo

AF:

0.00330

Asia WGS

AF:

0.000866

AC:

AN:

3478

EpiCase

AF:

0.0000545

EpiControl

AF:

0.000119

ClinVar

ClinVar submissions

Significance:Benign/Likely benign

Revision:criteria provided, multiple submitters, no conflicts

View on ClinVar

Pathogenic

VUS

Benign

Condition

not specified (7)

not provided (5)

Cardiomyopathy (2)

Cardiovascular phenotype (1)

Hypertrophic cardiomyopathy (1)

Lethal congenital glycogen storage disease of heart (1)

Computational scores

Source: dbNSFP v4.9

Name

Calibrated prediction

Score

Prediction

BayesDel_noAF

Benign

-0.76

CADD

Benign

4.4

(source)

DANN

Benign

0.78

PhyloP100

-0.73

Mutation Taster

=98/2

polymorphism

(source)

Splicing

Name

Calibrated prediction

Score

Prediction

SpliceAI score (max)

0.010

Details are displayed if max score is > 0.2

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

MaxEntScan Visualizer can be used to analyze the impact of this mutation on the neighboring sequence.

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